Initialier Commit

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml

.idea/.name

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+XXX BDSM Game

.idea/compiler.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="11" />
+  </component>
+</project>

.idea/gradle.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="testRunner" value="GRADLE" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="Embedded JDK" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>

app/.gitignore

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+/build

app/build.gradle

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+plugins {
+    id 'com.android.application'
+}
+
+android {
+    namespace 'com.example.xxxbdsmgame'
+    compileSdk 33
+
+    defaultConfig {
+        applicationId "com.example.xxxbdsmgame"
+        minSdk 24
+        targetSdk 33
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    buildFeatures {
+        viewBinding true
+    }
+}
+
+dependencies {
+
+    implementation 'androidx.appcompat:appcompat:1.4.1'
+    implementation 'com.google.android.material:material:1.5.0'
+    implementation 'androidx.annotation:annotation:1.3.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
+    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.4.1'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1'
+    implementation 'androidx.navigation:navigation-fragment:2.4.1'
+    implementation 'androidx.navigation:navigation-ui:2.4.1'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.XXXBDSMGame"
+        android:usesCleartextTraffic="true"
+        tools:targetApi="31">
+        <activity
+            android:name="de.oaa.xxxbdsmgame.ui.gruppe.anzeige.GruppeAnzeigenActivity"
+            android:exported="false"
+            android:label="@string/title_activity_gruppe_anzeigen"
+            android:theme="@style/Theme.XXXBDSMGame.NoActionBar" />
+        <activity
+            android:name="de.oaa.xxxbdsmgame.ui.sets.SetsActivity"
+            android:exported="false"
+            android:label="@string/title_activity_sets" />
+        <activity
+            android:name="de.oaa.xxxbdsmgame.ui.menu.MenuActivity"
+            android:exported="false"
+            android:label="@string/title_activity_menu" />
+        <activity
+            android:name="de.oaa.xxxbdsmgame.ui.register.RegisterActivity"
+            android:exported="false"
+            android:label="@string/title_activity_register" />
+        <activity
+            android:name="de.oaa.xxxbdsmgame.ui.login.LoginActivity"
+            android:exported="true"
+            android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/de/oaa/xxxbdsmgame/Constants.java

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+package de.oaa.xxxbdsmgame;
+
+public class Constants {
+
+    public static final String SERVICE_HOST = "http://10.0.2.2:8080";
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/LoginRepository.java

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+package de.oaa.xxxbdsmgame.data;
+
+import java.util.concurrent.ExecutionException;
+
+import de.oaa.xxxbdsmgame.data.model.LoggedInUser;
+
+/**
+ * Class that requests authentication and user information from the remote data source and
+ * maintains an in-memory cache of login status and user credentials information.
+ */
+public class LoginRepository {
+
+    private static volatile LoginRepository instance;
+
+    // If user credentials will be cached in local storage, it is recommended it be encrypted
+    // @see https://developer.android.com/training/articles/keystore
+    private LoggedInUser user = null;
+
+    // private constructor : singleton access
+    private LoginRepository() {
+    }
+
+    public static LoginRepository getInstance() {
+        if (instance == null) {
+            instance = new LoginRepository();
+        }
+        return instance;
+    }
+
+    public boolean isLoggedIn() {
+        return user != null;
+    }
+
+    private void setLoggedInUser(LoggedInUser user) {
+        this.user = user;
+        // If user credentials will be cached in local storage, it is recommended it be encrypted
+        // @see https://developer.android.com/training/articles/keystore
+    }
+
+    public Result<LoggedInUser> login(String username, String password) {
+        // handle login
+        LoginTask task = new LoginTask();
+        task.execute(username, password);
+        try {
+            return task.get();
+        } catch (ExecutionException e) {
+            throw new RuntimeException(e);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/LoginTask.java

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+package de.oaa.xxxbdsmgame.data;
+
+import android.os.AsyncTask;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import de.oaa.xxxbdsmgame.Constants;
+import de.oaa.xxxbdsmgame.data.model.LoggedInUser;
+
+import de.oaa.xxxbdsmgame.util.PasswordHelper;
+
+public class LoginTask extends AsyncTask<String, Void, Result> {
+
+    @Override
+    protected Result<LoggedInUser> doInBackground(String[] strings) {
+
+        try {
+            String hash = PasswordHelper.hashPassword(strings[1]);
+            URL url = new URL(Constants.SERVICE_HOST +
+                    "/user-service/login?email=" + strings[0] + "&hash=" + hash);
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestMethod("GET");
+            int responseCode = connection.getResponseCode();
+            if (responseCode == 200) {
+                BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
+                StringBuffer response = new StringBuffer();
+                String inputLine;
+                while ((inputLine = in.readLine()) != null) {
+                    response.append(inputLine);
+                }
+                in.close();
+                LoggedInUser user = new LoggedInUser(response.toString());
+                return Result.success(user);
+            } else {
+                return Result.error(new IllegalArgumentException("Unknown User"));
+            }
+
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            return Result.error(new IOException("Error logging in", e));
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/RegisterRepository.java

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+package de.oaa.xxxbdsmgame.data;
+
+import java.util.concurrent.ExecutionException;
+
+/**
+ * Class that requests authentication and user information from the remote data source and
+ * maintains an in-memory cache of login status and user credentials information.
+ */
+public class RegisterRepository {
+
+    private static volatile RegisterRepository instance;
+
+    private RegisterRepository() {
+    }
+
+    public static RegisterRepository getInstance() {
+        if (instance == null) {
+            instance = new RegisterRepository();
+        }
+        return instance;
+    }
+
+    public Result<Boolean> register(String name, String email, String password) {
+        RegisterTask task = new RegisterTask();
+        task.execute(name, email, password);
+        try {
+            return task.get();
+        } catch (ExecutionException e) {
+            throw new RuntimeException(e);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/RegisterTask.java

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+package de.oaa.xxxbdsmgame.data;
+
+import android.os.AsyncTask;
+
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import de.oaa.xxxbdsmgame.Constants;
+import de.oaa.xxxbdsmgame.data.model.LoggedInUser;
+import de.oaa.xxxbdsmgame.util.PasswordHelper;
+
+public class RegisterTask extends AsyncTask<String, Void, Result> {
+
+    @Override
+    protected Result<Boolean> doInBackground(String... strings) {
+        try {
+            String hash = PasswordHelper.hashPassword(strings[2]);
+            URL url = new URL(Constants.SERVICE_HOST +
+                    "/registration-service/registration/");
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestMethod("POST");
+            connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
+            connection.setRequestProperty("Accept","application/json");
+            connection.setDoOutput(true);
+            connection.setDoInput(true);
+
+            JSONObject object = new JSONObject();
+            object.put("name", strings[0]);
+            object.put("email", strings[1]);
+            object.put("passwordHash", hash);
+
+            DataOutputStream os = new DataOutputStream(connection.getOutputStream());
+            //os.writeBytes(URLEncoder.encode(jsonParam.toString(), "UTF-8"));
+            os.writeBytes(object.toString());
+            os.flush();
+            os.close();
+
+            int responseCode = connection.getResponseCode();
+            if (responseCode == 202) {
+                return Result.success(Boolean.TRUE);
+            } else {
+                return Result.error(new IllegalArgumentException("Unknown User"));
+            }
+
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            return Result.error(new IOException("Error logging in", e));
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/Result.java

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+package de.oaa.xxxbdsmgame.data;
+
+import android.util.Log;
+
+/**
+ * A generic class that holds a result success w/ data or an error exception.
+ */
+public class Result<T> {
+
+    private T data;
+
+    private Exception error;
+
+    // hide the private constructor to limit subclass types (Success, Error)
+    private Result() {
+    }
+
+    public static <T> Result<T> success(T data) {
+        Result<T> result = new Result<>();
+        result.data = data;
+        return result;
+    }
+
+    public static <T> Result<T> error(Exception error) {
+        Result<T> result = new Result<>();
+        result.error = error;
+        return result;
+    }
+
+    public T getData() {
+        return data;
+    }
+
+    public Exception getError() {
+        return error;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/model/LoggedInUser.java

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+package de.oaa.xxxbdsmgame.data.model;
+
+/**
+ * Data class that captures user information for logged in users retrieved from LoginRepository
+ */
+public class LoggedInUser {
+
+    private final String token;
+
+    public LoggedInUser(String token) {
+        this.token = token;
+    }
+
+    public String getToken() {
+        return token;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/sets/AufgabenGruppeAbrufenTask.java

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+package de.oaa.xxxbdsmgame.data.sets;
+
+import android.os.AsyncTask;
+
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import de.oaa.xxxbdsmgame.Constants;
+import de.oaa.xxxbdsmgame.data.Result;
+
+public class AufgabenGruppeAbrufenTask extends AsyncTask<String, Void, Result> {
+    private String token;
+
+    public AufgabenGruppeAbrufenTask(String token) {
+        this.token = token;
+    }
+
+    @Override
+    protected Result<JSONObject> doInBackground(String... strings) {
+        JSONObject result = null;
+        BufferedReader br = null;
+        try {
+            URL url = new URL(Constants.SERVICE_HOST +
+                    "/aufgaben-service/gruppe/" + strings[0]);
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestProperty("token", token);
+            if (connection.getResponseCode() == 200) {
+                br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
+                StringBuilder sb = new StringBuilder();
+
+                String line;
+                while ((line = br.readLine()) != null) {
+                    sb.append(line + "\n");
+                }
+                br.close();
+                result = new JSONObject(sb.toString());
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+            return Result.error(new IOException("Request error", e));
+        } finally {
+            if (br != null) {
+                try {
+                    br.close();
+                } catch (IOException e) {
+                    return Result.error(new IOException("Request error", e));
+                }
+            }
+        }
+        return result != null ? Result.success(result) : null;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/sets/AufgabenGruppenAbrufenTask.java

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+package de.oaa.xxxbdsmgame.data.sets;
+
+import android.os.AsyncTask;
+
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import de.oaa.xxxbdsmgame.Constants;
+import de.oaa.xxxbdsmgame.data.Result;
+import de.oaa.xxxbdsmgame.util.PasswordHelper;
+import de.oaa.xxxbdsmgame.util.TokenHelper;
+
+public class AufgabenGruppenAbrufenTask extends AsyncTask<String, Void, Result> {
+
+    private String token;
+
+    public AufgabenGruppenAbrufenTask(String token) {
+        this.token = token;
+    }
+
+    @Override
+    protected Result<JSONObject> doInBackground(String... strings) {
+        JSONObject result = null;
+        BufferedReader br = null;
+        try {
+            URL url = new URL(Constants.SERVICE_HOST +
+                    "/aufgaben-service/gruppe/" + strings[0] + (strings.length == 2 ? "?search=" + strings[1] : ""));
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestProperty("token", token);
+            if (connection.getResponseCode() == 200) {
+                br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
+                StringBuilder sb = new StringBuilder();
+
+                String line;
+                while ((line = br.readLine()) != null) {
+                    sb.append(line + "\n");
+                }
+                br.close();
+                result = new JSONObject(sb.toString());
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+            return Result.error(new IOException("Request error", e));
+        } finally {
+            if (br != null) {
+                try {
+                    br.close();
+                } catch (IOException e) {
+                    return Result.error(new IOException("Request error", e));
+                }
+            }
+        }
+        return result != null ? Result.success(result) : null;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/sets/FavoritEntfernenTask.java

@@ -0,0 +1,57 @@
+package de.oaa.xxxbdsmgame.data.sets;
+
+import android.os.AsyncTask;
+
+import org.json.JSONObject;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import de.oaa.xxxbdsmgame.Constants;
+import de.oaa.xxxbdsmgame.data.Result;
+
+public class FavoritEntfernenTask extends AsyncTask<String, Void, Result> {
+    private String token;
+
+    public FavoritEntfernenTask(String token) {
+        this.token = token;
+    }
+
+    @Override
+    protected Result<Boolean> doInBackground(String... strings) {
+        try {
+            URL url = new URL(Constants.SERVICE_HOST +
+                    "/aufgaben-service/favorit/");
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestMethod("DELETE");
+            connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
+            connection.setRequestProperty("Accept", "application/json");
+            connection.setDoOutput(true);
+            connection.setDoInput(false);
+
+            connection.setRequestProperty("token", token);
+
+            JSONObject object = new JSONObject();
+            object.put("aufgabenGruppeId", strings[0]);
+
+            DataOutputStream os = new DataOutputStream(connection.getOutputStream());
+            //os.writeBytes(URLEncoder.encode(jsonParam.toString(), "UTF-8"));
+            os.writeBytes(object.toString());
+            os.flush();
+            os.close();
+
+            int responseCode = connection.getResponseCode();
+            if (responseCode == 201) {
+                return Result.success(Boolean.TRUE);
+            } else {
+                return Result.error(new IllegalArgumentException("Unknown User"));
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            return Result.error(new IOException("Request error", e));
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/sets/FavoritErstellenTask.java

@@ -0,0 +1,59 @@
+package de.oaa.xxxbdsmgame.data.sets;
+
+import android.os.AsyncTask;
+
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import de.oaa.xxxbdsmgame.Constants;
+import de.oaa.xxxbdsmgame.data.Result;
+
+public class FavoritErstellenTask extends AsyncTask<String, Void, Result> {
+    private String token;
+
+    public FavoritErstellenTask(String token) {
+        this.token = token;
+    }
+
+    @Override
+    protected Result<Boolean> doInBackground(String... strings) {
+        try {
+            URL url = new URL(Constants.SERVICE_HOST +
+                    "/aufgaben-service/favorit/");
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestMethod("POST");
+            connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
+            connection.setRequestProperty("Accept","application/json");
+            connection.setDoOutput(true);
+            connection.setDoInput(false);
+
+            connection.setRequestProperty("token", token);
+
+            JSONObject object = new JSONObject();
+            object.put("aufgabenGruppeId", strings[0]);
+
+            DataOutputStream os = new DataOutputStream(connection.getOutputStream());
+            //os.writeBytes(URLEncoder.encode(jsonParam.toString(), "UTF-8"));
+            os.writeBytes(object.toString());
+            os.flush();
+            os.close();
+
+            int responseCode = connection.getResponseCode();
+            if (responseCode == 201) {
+                return Result.success(Boolean.TRUE);
+            } else {
+                return Result.error(new IllegalArgumentException("Unknown User"));
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            return Result.error(new IOException("Request error", e));
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/sets/FavoritenAbrufenTask.java

@@ -0,0 +1,60 @@
+package de.oaa.xxxbdsmgame.data.sets;
+
+import android.os.AsyncTask;
+
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import de.oaa.xxxbdsmgame.Constants;
+import de.oaa.xxxbdsmgame.data.Result;
+
+public class FavoritenAbrufenTask extends AsyncTask<String, Void, Result> {
+    private String token;
+
+    public FavoritenAbrufenTask(String token) {
+        this.token = token;
+    }
+
+    @Override
+    protected Result<JSONObject> doInBackground(String... strings) {
+        JSONObject result = null;
+        BufferedReader br = null;
+        try {
+            URL url = new URL(Constants.SERVICE_HOST +
+                    "/aufgaben-service/favorit/");
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestProperty("token", token);
+
+            if (connection.getResponseCode() == 200) {
+                br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
+                StringBuilder sb = new StringBuilder();
+
+                String line;
+                while ((line = br.readLine()) != null) {
+                    sb.append(line + "\n");
+                }
+                br.close();
+                result = new JSONObject(sb.toString());
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            return Result.error(new IOException("Request error", e));
+        } finally {
+            if (br != null) {
+                try {
+                    br.close();
+                } catch (IOException e) {
+                    return Result.error(new IOException("Request error", e));
+                }
+            }
+        }
+        return result != null ? Result.success(result) : null;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/sets/FavoritenRepository.java

@@ -0,0 +1,51 @@
+package de.oaa.xxxbdsmgame.data.sets;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+import de.oaa.xxxbdsmgame.data.Result;
+
+public class FavoritenRepository {
+
+    private static FavoritenRepository instance;
+
+    private String token;
+
+    private FavoritenRepository(String token) {
+        this.token = token;
+    }
+
+    public static FavoritenRepository getInstance(String token) {
+        if (instance == null) {
+            instance = new FavoritenRepository(token);
+        }
+        return instance;
+    }
+
+    public void add(String aufgabenGruppeId) {
+        new FavoritErstellenTask(token).execute(aufgabenGruppeId);
+    }
+
+    public void remove(String aufgabenGruppeId) {
+        new FavoritEntfernenTask(token).execute(aufgabenGruppeId);
+    }
+
+    public List<UUID> get() {
+        List<UUID> gruppen = new ArrayList<>();
+        try {
+            Result<JSONObject> result = new FavoritenAbrufenTask(token).execute().get();
+            JSONArray array = result.getData().getJSONArray("favoriten");
+            for (int i = 0; i < array.length(); i++) {
+                JSONObject jsonObject = array.getJSONObject(i);
+                gruppen.add(UUID.fromString(jsonObject.getString("aufgabenGruppeId")));
+            }
+        } catch (Exception exception) {
+            throw new RuntimeException(exception);
+        }
+        return gruppen;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/data/sets/SetsRepository.java

@@ -0,0 +1,64 @@
+package de.oaa.xxxbdsmgame.data.sets;
+
+import org.json.JSONObject;
+
+import java.util.concurrent.ExecutionException;
+
+import de.oaa.xxxbdsmgame.data.Result;
+
+public class SetsRepository {
+
+    private static SetsRepository instance;
+    private String token;
+
+    private SetsRepository(String token) {
+        this.token = token;
+    }
+
+    public static SetsRepository getInstance(String token) {
+        if (instance == null) {
+            instance = new SetsRepository(token);
+        }
+        return instance;
+    }
+
+    public Result<JSONObject> getAlle(String search) {
+        AufgabenGruppenAbrufenTask task = new AufgabenGruppenAbrufenTask(token);
+        if (search == null) {
+            task.execute("all");
+        } else {
+            task.execute("all", search);
+        }
+        try {
+            return task.get();
+        } catch (ExecutionException e) {
+            throw new RuntimeException(e);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public Result<JSONObject> getEigene() {
+        AufgabenGruppenAbrufenTask task = new AufgabenGruppenAbrufenTask(token);
+        task.execute("own");
+        try {
+            return task.get();
+        } catch (ExecutionException e) {
+            throw new RuntimeException(e);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public Result<JSONObject> getGruppe(String gruppeId) {
+        AufgabenGruppeAbrufenTask task = new AufgabenGruppeAbrufenTask(token);
+        task.execute(gruppeId);
+        try {
+            return task.get();
+        } catch (ExecutionException e) {
+            throw new RuntimeException(e);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/gruppe/anzeige/AufgabenAnzeigeFragment.java

@@ -0,0 +1,30 @@
+package de.oaa.xxxbdsmgame.ui.gruppe.anzeige;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+import com.example.xxxbdsmgame.R;
+
+import org.json.JSONObject;
+
+public class AufgabenAnzeigeFragment extends Fragment {
+
+    public AufgabenAnzeigeFragment(JSONObject gruppe) {
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater,
+                             @Nullable ViewGroup container,
+                             @Nullable Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.fragment_toys_anzeige, container, false);
+
+
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/gruppe/anzeige/AufgabenListViewAdapter.java

@@ -0,0 +1,163 @@
+package de.oaa.xxxbdsmgame.ui.gruppe.anzeige;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.drawable.Icon;
+import android.os.Build;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.CompoundButton;
+import android.widget.ImageView;
+import android.widget.Switch;
+import android.widget.TextView;
+
+import androidx.annotation.RequiresApi;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.example.xxxbdsmgame.R;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.Comparator;
+import java.util.List;
+import java.util.UUID;
+
+import de.oaa.xxxbdsmgame.ui.sets.SetsListViewAdapter;
+
+
+public class AufgabenListViewAdapter extends RecyclerView.Adapter<AufgabenListViewAdapter.ViewHolder> {
+
+
+    private final List<JSONObject> aufgaben;
+    private final List<JSONObject> strafen;
+    private final List<JSONObject> sperren;
+
+    private LayoutInflater mInflater;
+
+    private GruppeAnzeigenActivity parent;
+    private Bitmap aufgabeImage;
+    private Bitmap strafeImage;
+    private Bitmap sperreImage;
+
+    AufgabenListViewAdapter(Context context, JSONObject gruppe) {
+        this.mInflater = LayoutInflater.from(context);
+
+        this.aufgaben = new ArrayList<>();
+        this.strafen = new ArrayList<>();
+        this.sperren = new ArrayList<>();
+
+        initData(gruppe);
+    }
+
+    private void initData(JSONObject gruppe) {
+        try {
+            JSONArray aufgaben = gruppe.getJSONArray("aufgaben");
+            for (int i = 0; i < aufgaben.length(); i++) {
+                this.aufgaben.add(aufgaben.getJSONObject(i));
+            }
+            this.aufgaben.sort(levelAndNameComparator());
+            JSONArray strafen = gruppe.getJSONArray("strafen");
+            for (int i = 0; i < strafen.length(); i++) {
+                this.strafen.add(strafen.getJSONObject(i));
+            }
+            this.strafen.sort(levelAndNameComparator());
+            JSONArray sperren = gruppe.getJSONArray("sperren");
+            for (int i = 0; i < sperren.length(); i++) {
+                this.sperren.add(sperren.getJSONObject(i));
+            }
+
+            aufgabeImage = BitmapFactory.decodeStream(getClass().getResourceAsStream("aufgabe.png"));
+            strafeImage = BitmapFactory.decodeStream(getClass().getResourceAsStream("strafe.png"));
+            sperreImage = BitmapFactory.decodeStream(getClass().getResourceAsStream("sperre.png"));
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private Comparator<JSONObject> levelAndNameComparator() {
+        return new Comparator<JSONObject>() {
+            @Override
+            public int compare(JSONObject o1, JSONObject o2) {
+                try {
+                    int level = o1.getString("level").compareTo(o2.getString("level"));
+                    if (level == 0) {
+                        return o1.getString("kurzText").compareTo(o2.getString("kurzText"));
+                    } else {
+                        return level;
+                    }
+
+                } catch (Exception e) {
+                    throw new RuntimeException();
+                }
+            }
+        };
+    }
+
+    @Override
+    public int getItemCount() {
+        return aufgaben.size() + strafen.size() + sperren.size();
+    }
+
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    @Override
+    public void onBindViewHolder(AufgabenListViewAdapter.ViewHolder holder, int position) {
+        try {
+            if (position < aufgaben.size()) {
+                JSONObject aufgabe = aufgaben.get(position);
+                holder.bild.setImageIcon(Icon.createWithBitmap(aufgabeImage));
+                holder.name.setText(aufgabe.getString("kurzText") + " (" + aufgabe.getString("level") + ")");
+                holder.text.setText(aufgabe.getString("text"));
+            } else if (position < (aufgaben.size() + strafen.size())) {
+                JSONObject strafe = aufgaben.get(position - aufgaben.size());
+                holder.bild.setImageIcon(Icon.createWithBitmap(strafeImage));
+                holder.name.setText(strafe.getString("kurzText") + " (" + strafe.getString("level") + ")");
+                holder.text.setText(strafe.getString("text"));
+            } else {
+                JSONObject sperre = aufgaben.get(position - (aufgaben.size() - strafen.size()));
+                holder.bild.setImageIcon(Icon.createWithBitmap(sperreImage));
+                holder.name.setText(sperre.getString("kurzText"));
+                holder.text.setText(sperre.getString("text"));
+            }
+        } catch (Exception exception) {
+            throw new RuntimeException(exception);
+        }
+    }
+
+    @Override
+    public AufgabenListViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        View view = mInflater.inflate(R.layout.sets_row, parent, false);
+        return new AufgabenListViewAdapter.ViewHolder(view);
+    }
+
+    // stores and recycles views as they are scrolled off screen
+    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
+        ImageView bild;
+
+        TextView name;
+
+        TextView text;
+
+        JSONObject object;
+
+        ViewHolder(View itemView) {
+            super(itemView);
+            bild = itemView.findViewById(R.id.aufgabeBild);
+            name = itemView.findViewById(R.id.aufgabeName);
+            text = itemView.findViewById(R.id.aufgabeText);
+
+            itemView.setOnClickListener(this);
+        }
+
+        @Override
+        public void onClick(View view) {
+
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/gruppe/anzeige/GruppeAnzeigenActivity.java

@@ -0,0 +1,48 @@
+package de.oaa.xxxbdsmgame.ui.gruppe.anzeige;
+
+import android.content.Intent;
+import android.os.Bundle;
+
+import com.example.xxxbdsmgame.databinding.ActivityGruppeAnzeigenBinding;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
+import com.google.android.material.tabs.TabLayout;
+
+import androidx.viewpager.widget.ViewPager;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.viewpager2.widget.ViewPager2;
+
+import android.view.View;
+
+import org.json.JSONObject;
+
+import de.oaa.xxxbdsmgame.data.sets.SetsRepository;
+import de.oaa.xxxbdsmgame.util.TokenHelper;
+
+public class GruppeAnzeigenActivity extends AppCompatActivity {
+
+    private ActivityGruppeAnzeigenBinding binding;
+
+    private SetsRepository setsRepository;
+
+    private JSONObject gruppe;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        binding = ActivityGruppeAnzeigenBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+
+        Intent intent = getIntent();
+        setsRepository = SetsRepository.getInstance(TokenHelper.getToken(getApplicationContext()));
+
+        gruppe = setsRepository.getGruppe(intent.getStringExtra("gruppeId")).getData();
+
+        GruppeViewPagerAdapter gruppePagerAdapter = new GruppeViewPagerAdapter(this, gruppe);
+        ViewPager2 viewPager = binding.pager;
+        viewPager.setAdapter(gruppePagerAdapter);
+
+
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/gruppe/anzeige/GruppeViewPagerAdapter.java

@@ -0,0 +1,34 @@
+package de.oaa.xxxbdsmgame.ui.gruppe.anzeige;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.fragment.app.FragmentPagerAdapter;
+import androidx.viewpager.widget.ViewPager;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+
+import org.json.JSONObject;
+
+public class GruppeViewPagerAdapter extends FragmentStateAdapter {
+
+
+    private final AufgabenAnzeigeFragment aufgabeFragment;
+    private final ToysAnzeigeFragment toysFragment;
+
+    public GruppeViewPagerAdapter(@NonNull FragmentActivity fragmentActivity, JSONObject gruppe) {
+        super(fragmentActivity);
+        this.aufgabeFragment = new AufgabenAnzeigeFragment(gruppe);
+        this.toysFragment = new ToysAnzeigeFragment(gruppe);
+    }
+
+    @NonNull
+    @Override
+    public Fragment createFragment(int position) {
+        return position == 0 ? aufgabeFragment : toysFragment;
+    }
+
+    @Override
+    public int getItemCount() {
+        return 2;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/gruppe/anzeige/ToysAnzeigeFragment.java

@@ -0,0 +1,29 @@
+package de.oaa.xxxbdsmgame.ui.gruppe.anzeige;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.fragment.app.Fragment;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.example.xxxbdsmgame.R;
+
+import org.json.JSONObject;
+
+public class ToysAnzeigeFragment extends Fragment {
+
+    public ToysAnzeigeFragment(JSONObject gruppe) {
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater,
+                             @Nullable ViewGroup container,
+                             @Nullable Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.fragment_toys_anzeige, container, false);
+
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/login/LoggedInUserView.java

@@ -0,0 +1,17 @@
+package de.oaa.xxxbdsmgame.ui.login;
+
+/**
+ * Class exposing authenticated user details to the UI.
+ */
+class LoggedInUserView {
+    private String displayName;
+    //... other data fields that may be accessible to the UI
+
+    LoggedInUserView(String displayName) {
+        this.displayName = displayName;
+    }
+
+    String getDisplayName() {
+        return displayName;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/login/LoginActivity.java

@@ -0,0 +1,150 @@
+package de.oaa.xxxbdsmgame.ui.login;
+
+import android.app.Activity;
+
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+
+import android.content.Intent;
+import android.os.Bundle;
+
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.inputmethod.EditorInfo;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+
+import com.example.xxxbdsmgame.databinding.ActivityLoginBinding;
+
+import de.oaa.xxxbdsmgame.ui.menu.MenuActivity;
+import de.oaa.xxxbdsmgame.util.TokenHelper;
+
+public class LoginActivity extends AppCompatActivity {
+
+    private LoginViewModel loginViewModel;
+    private ActivityLoginBinding binding;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        String token = TokenHelper.getToken(getApplicationContext());
+        if (token != null) {
+            openMenu();
+        } else {
+            initUi();
+        }
+
+    }
+
+    private void initUi() {
+        binding = ActivityLoginBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+
+        loginViewModel = new ViewModelProvider(this, new LoginViewModelFactory())
+                .get(LoginViewModel.class);
+
+        Intent intent = getIntent();
+
+        final EditText emailEditText = binding.email;
+        final EditText passwordEditText = binding.password;
+        final Button loginButton = binding.login;
+        final ProgressBar loadingProgressBar = binding.loading;
+        emailEditText.setText(intent.getStringExtra("email"));
+        passwordEditText.setText(intent.getStringExtra("password"));
+
+        loginViewModel.getLoginFormState().observe(this, new Observer<LoginFormState>() {
+            @Override
+            public void onChanged(@Nullable LoginFormState loginFormState) {
+                if (loginFormState == null) {
+                    return;
+                }
+                loginButton.setEnabled(loginFormState.isDataValid());
+                if (loginFormState.getUsernameError() != null) {
+                    emailEditText.setError(getString(loginFormState.getUsernameError()));
+                }
+                if (loginFormState.getPasswordError() != null) {
+                    passwordEditText.setError(getString(loginFormState.getPasswordError()));
+                }
+            }
+        });
+
+        loginViewModel.getLoginResult().observe(this, new Observer<LoginResult>() {
+            @Override
+            public void onChanged(@Nullable LoginResult loginResult) {
+                if (loginResult == null) {
+                    return;
+                }
+                loadingProgressBar.setVisibility(View.GONE);
+                if (loginResult.getError() != null) {
+                    showLoginFailed(loginResult);
+                }
+                if (loginResult.getToken() != null) {
+                    TokenHelper.storeToken(loginResult.getToken(), getApplicationContext());
+                    openMenu();
+                }
+                setResult(Activity.RESULT_OK);
+
+                //Complete and destroy login activity once successful
+                finish();
+            }
+        });
+
+        TextWatcher afterTextChangedListener = new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+                // ignore
+            }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                // ignore
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) {
+                loginViewModel.loginDataChanged(emailEditText.getText().toString(),
+                        passwordEditText.getText().toString());
+            }
+        };
+        emailEditText.addTextChangedListener(afterTextChangedListener);
+        passwordEditText.addTextChangedListener(afterTextChangedListener);
+        passwordEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
+
+            @Override
+            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+                if (actionId == EditorInfo.IME_ACTION_DONE) {
+                    loginViewModel.login(emailEditText.getText().toString(),
+                            passwordEditText.getText().toString());
+                }
+                return false;
+            }
+        });
+
+        loginButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                loadingProgressBar.setVisibility(View.VISIBLE);
+                loginViewModel.login(emailEditText.getText().toString(),
+                        passwordEditText.getText().toString());
+            }
+        });
+    }
+
+    private void openMenu() {
+        Intent intent = new Intent(this, MenuActivity.class);
+        startActivity(intent);
+    }
+
+    private void showLoginFailed(LoginResult loginResult) {
+        LoginFailedDialog dialog = new LoginFailedDialog(loginResult.getEingabeEmail(), loginResult.getEingabePasswort());
+        dialog.showNow(getSupportFragmentManager(), "test");
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/login/LoginFailedDialog.java

@@ -0,0 +1,46 @@
+package de.oaa.xxxbdsmgame.ui.login;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.DialogFragment;
+
+import com.example.xxxbdsmgame.R;
+
+import de.oaa.xxxbdsmgame.ui.register.RegisterActivity;
+
+public class LoginFailedDialog extends DialogFragment {
+
+    private String email;
+    private String password;
+
+    public LoginFailedDialog(String email, String password) {
+
+        this.email = email;
+        this.password = password;
+    }
+
+    @NonNull
+    @Override
+    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+        builder.setMessage(R.string.login_failed).setPositiveButton(R.string.back, (dialog, which) -> {
+                    Intent intent = new Intent(getActivity(), LoginActivity.class);
+                    intent.putExtra("email", email);
+                    intent.putExtra("password", "");
+                    startActivity(intent);
+                }).setNegativeButton(R.string.action_register, (dialog, which) -> {
+                    Intent intent = new Intent(getActivity(), RegisterActivity.class);
+                    intent.putExtra("email", email);
+                    intent.putExtra("password", password);
+                    startActivity(intent);
+        });
+        return builder.create();
+    }
+}
+

app/src/main/java/de/oaa/xxxbdsmgame/ui/login/LoginFormState.java

@@ -0,0 +1,40 @@
+package de.oaa.xxxbdsmgame.ui.login;
+
+import androidx.annotation.Nullable;
+
+/**
+ * Data validation state of the login form.
+ */
+class LoginFormState {
+    @Nullable
+    private Integer usernameError;
+    @Nullable
+    private Integer passwordError;
+    private boolean isDataValid;
+
+    LoginFormState(@Nullable Integer usernameError, @Nullable Integer passwordError) {
+        this.usernameError = usernameError;
+        this.passwordError = passwordError;
+        this.isDataValid = false;
+    }
+
+    LoginFormState(boolean isDataValid) {
+        this.usernameError = null;
+        this.passwordError = null;
+        this.isDataValid = isDataValid;
+    }
+
+    @Nullable
+    Integer getUsernameError() {
+        return usernameError;
+    }
+
+    @Nullable
+    Integer getPasswordError() {
+        return passwordError;
+    }
+
+    boolean isDataValid() {
+        return isDataValid;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/login/LoginResult.java

@@ -0,0 +1,53 @@
+package de.oaa.xxxbdsmgame.ui.login;
+
+import androidx.annotation.Nullable;
+
+/**
+ * Authentication result : success (user details) or error message.
+ */
+class LoginResult {
+    @Nullable
+    private String token;
+    @Nullable
+    private Integer error;
+
+    @Nullable
+    private String eingabeEmail;
+
+    @Nullable
+    private String eingabePasswort;
+
+    LoginResult(@Nullable Integer error, String eingabeEmail, String eingabePasswort) {
+        this.error = error;
+        this.eingabeEmail = eingabeEmail;
+        this.eingabePasswort = eingabePasswort;
+    }
+
+    LoginResult(@Nullable String token) {
+        this.token = token;
+    }
+
+    @Nullable
+    String getToken() {
+        return token;
+    }
+
+    @Nullable
+    Integer getError() {
+        return error;
+    }
+
+    @Nullable
+    public String getEingabeEmail() {
+        return eingabeEmail;
+    }
+
+    @Nullable
+    public String getEingabePasswort() {
+        return eingabePasswort;
+    }
+
+    public void setEingabePasswort(@Nullable String eingabePasswort) {
+        this.eingabePasswort = eingabePasswort;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/login/LoginViewModel.java

@@ -0,0 +1,74 @@
+package de.oaa.xxxbdsmgame.ui.login;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import android.content.Intent;
+import android.util.Patterns;
+
+import de.oaa.xxxbdsmgame.data.LoginRepository;
+import de.oaa.xxxbdsmgame.data.Result;
+import de.oaa.xxxbdsmgame.data.model.LoggedInUser;
+import de.oaa.xxxbdsmgame.ui.register.RegisterActivity;
+import de.oaa.xxxbdsmgame.util.TokenHelper;
+
+import com.example.xxxbdsmgame.R;
+
+public class LoginViewModel extends ViewModel {
+
+    private MutableLiveData<LoginFormState> loginFormState = new MutableLiveData<>();
+    private MutableLiveData<LoginResult> loginResult = new MutableLiveData<>();
+    private LoginRepository loginRepository;
+
+    LoginViewModel(LoginRepository loginRepository) {
+        this.loginRepository = loginRepository;
+    }
+
+    LiveData<LoginFormState> getLoginFormState() {
+        return loginFormState;
+    }
+
+    LiveData<LoginResult> getLoginResult() {
+        return loginResult;
+    }
+
+    public void login(String username, String password) {
+        // can be launched in a separate asynchronous job
+        Result<LoggedInUser> result = loginRepository.login(username, password);
+
+        if (result.getData() != null) {
+            LoggedInUser data = result.getData();
+            loginResult.setValue(new LoginResult(data.getToken()));
+        } else {
+            loginResult.setValue(new LoginResult(R.string.login_failed, username, password));
+        }
+    }
+
+    public void loginDataChanged(String username, String password) {
+        if (!isUserNameValid(username)) {
+            loginFormState.setValue(new LoginFormState(R.string.invalid_name, null));
+        } else if (!isPasswordValid(password)) {
+            loginFormState.setValue(new LoginFormState(null, R.string.invalid_password));
+        } else {
+            loginFormState.setValue(new LoginFormState(true));
+        }
+    }
+
+    // A placeholder username validation check
+    private boolean isUserNameValid(String username) {
+        if (username == null) {
+            return false;
+        }
+        if (username.contains("@")) {
+            return Patterns.EMAIL_ADDRESS.matcher(username).matches();
+        } else {
+            return !username.trim().isEmpty();
+        }
+    }
+
+    // A placeholder password validation check
+    private boolean isPasswordValid(String password) {
+        return password != null && password.trim().length() > 5;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/login/LoginViewModelFactory.java

@@ -0,0 +1,25 @@
+package de.oaa.xxxbdsmgame.ui.login;
+
+import androidx.lifecycle.ViewModel;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.annotation.NonNull;
+
+import de.oaa.xxxbdsmgame.data.LoginRepository;
+
+/**
+ * ViewModel provider factory to instantiate LoginViewModel.
+ * Required given LoginViewModel has a non-empty constructor
+ */
+public class LoginViewModelFactory implements ViewModelProvider.Factory {
+
+    @NonNull
+    @Override
+    @SuppressWarnings("unchecked")
+    public <T extends ViewModel> T create(@NonNull Class<T> modelClass) {
+        if (modelClass.isAssignableFrom(LoginViewModel.class)) {
+            return (T) new LoginViewModel(LoginRepository.getInstance());
+        } else {
+            throw new IllegalArgumentException("Unknown ViewModel class");
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/menu/MenuActivity.java

@@ -0,0 +1,71 @@
+package de.oaa.xxxbdsmgame.ui.menu;
+
+import android.app.Activity;
+
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.StringRes;
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.inputmethod.EditorInfo;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.example.xxxbdsmgame.databinding.ActivityMenuBinding;
+
+import java.util.Map;
+
+import de.oaa.xxxbdsmgame.ui.sets.SetsActivity;
+import de.oaa.xxxbdsmgame.util.TokenHelper;
+
+
+public class MenuActivity extends AppCompatActivity {
+    private ActivityMenuBinding binding;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        TokenHelper.getToken(getApplicationContext());
+
+        binding = ActivityMenuBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+
+        binding.buttonProfile.setOnClickListener((v) -> {
+
+        });
+
+        binding.buttonSettings.setOnClickListener((v) -> {
+
+        });
+
+        binding.buttonSets.setOnClickListener((v) -> {
+            Intent intent = new Intent(this, SetsActivity.class);
+            intent.putExtra("all", Boolean.TRUE);
+            startActivity(intent);
+        });
+
+        binding.buttonOwnSets.setOnClickListener((v) -> {
+            Intent intent = new Intent(this, SetsActivity.class);
+            intent.putExtra("all", Boolean.FALSE);
+            startActivity(intent);
+        });
+
+        binding.buttonNewGame.setOnClickListener((v) -> {
+
+        });
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/register/RegisterActivity.java

@@ -0,0 +1,139 @@
+package de.oaa.xxxbdsmgame.ui.register;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.inputmethod.EditorInfo;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.StringRes;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+
+import com.example.xxxbdsmgame.R;
+import com.example.xxxbdsmgame.databinding.ActivityRegisterBinding;
+
+import de.oaa.xxxbdsmgame.ui.login.LoginActivity;
+
+public class RegisterActivity extends AppCompatActivity {
+
+    private RegisterViewModel viewModel;
+    private ActivityRegisterBinding binding;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        Intent intent = getIntent();
+
+        binding = ActivityRegisterBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+
+        viewModel = new ViewModelProvider(this, new RegisterViewModelFactory())
+                .get(RegisterViewModel.class);
+
+        final EditText nameEditText = binding.name;
+        final EditText emailEditText = binding.email;
+        emailEditText.setText(intent.getStringExtra("email"));
+        final EditText passwordEditText = binding.password;
+        passwordEditText.setText(intent.getStringExtra("password"));
+        final Button loginButton = binding.login;
+
+        viewModel.getRegisterFormState().observe(this, new Observer<RegisterFormState>() {
+            @Override
+            public void onChanged(@Nullable RegisterFormState loginFormState) {
+                if (loginFormState == null) {
+                    return;
+                }
+                loginButton.setEnabled(loginFormState.isDataValid());
+                if (loginFormState.getNameError() != null) {
+                    nameEditText.setError(getString(loginFormState.getNameError()));
+                }
+                if (loginFormState.getEmailError() != null) {
+                    emailEditText.setError(getString(loginFormState.getEmailError()));
+                }
+                if (loginFormState.getPasswordError() != null) {
+                    passwordEditText.setError(getString(loginFormState.getPasswordError()));
+                }
+            }
+        });
+
+        viewModel.getRegisterResult().observe(this, new Observer<RegisterResult>() {
+            @Override
+            public void onChanged(@Nullable RegisterResult result) {
+                if (result == null) {
+                    return;
+                }
+               if (result.getError() != null) {
+                    updateAfterError(result.getError());
+                } else {
+                    updateAfterSuccess(result);
+                }
+                setResult(Activity.RESULT_OK);
+            }
+        });
+
+        TextWatcher afterTextChangedListener = new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+                // ignore
+            }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                // ignore
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) {
+                viewModel.registerDataChanged(nameEditText.getText().toString(),
+                        emailEditText.getText().toString(),
+                        passwordEditText.getText().toString());
+            }
+        };
+        nameEditText.addTextChangedListener(afterTextChangedListener);
+        emailEditText.addTextChangedListener(afterTextChangedListener);
+        passwordEditText.addTextChangedListener(afterTextChangedListener);
+        passwordEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
+
+            @Override
+            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+                if (actionId == EditorInfo.IME_ACTION_DONE) {
+                    viewModel.register(nameEditText.getText().toString(),
+                            emailEditText.getText().toString(),
+                            passwordEditText.getText().toString());
+                }
+                return false;
+            }
+        });
+
+        loginButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                viewModel.register(nameEditText.getText().toString(),
+                        emailEditText.getText().toString(),
+                        passwordEditText.getText().toString());
+            }
+        });
+    }
+
+    private void updateAfterSuccess(RegisterResult result) {
+        RegisterSuccessDialog dialog = new RegisterSuccessDialog(result);
+        dialog.showNow(getSupportFragmentManager(), "test");
+    }
+
+    private void updateAfterError(@StringRes Integer errorString) {
+        Toast.makeText(getApplicationContext(), errorString, Toast.LENGTH_SHORT).show();
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/register/RegisterFormState.java

@@ -0,0 +1,50 @@
+package de.oaa.xxxbdsmgame.ui.register;
+
+import androidx.annotation.Nullable;
+
+/**
+ * Data validation state of the login form.
+ */
+class RegisterFormState {
+    @Nullable
+    private Integer nameError;
+    @Nullable
+    private Integer emailError;
+    @Nullable
+    private Integer passwordError;
+    private boolean isDataValid;
+
+    RegisterFormState(@Nullable Integer nameError, @Nullable Integer emailError, @Nullable Integer passwordError) {
+        this.nameError = nameError;
+        this.emailError = emailError;
+        this.passwordError = passwordError;
+        this.isDataValid = false;
+    }
+
+    RegisterFormState(boolean isDataValid) {
+        this.nameError = null;
+        this.emailError = null;
+        this.passwordError = null;
+        this.isDataValid = isDataValid;
+    }
+
+    @Nullable
+    Integer getNameError() {
+
+        return nameError;
+    }
+
+    @Nullable
+    public Integer getEmailError() {
+        return emailError;
+    }
+
+    @Nullable
+    public Integer getPasswordError() {
+        return passwordError;
+    }
+
+    boolean isDataValid() {
+        return isDataValid;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/register/RegisterResult.java

@@ -0,0 +1,36 @@
+package de.oaa.xxxbdsmgame.ui.register;
+
+import androidx.annotation.Nullable;
+
+/**
+ * Authentication result : success (user details) or error message.
+ */
+class RegisterResult {
+
+    private String email;
+    private String password;
+    @Nullable
+    private Integer error;
+
+    RegisterResult(@Nullable Integer error) {
+        this.error = error;
+    }
+
+    RegisterResult(String email, String password) {
+        this.email = email;
+        this.password = password;
+    }
+
+    @Nullable
+    Integer getError() {
+        return error;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/register/RegisterSuccessDialog.java

@@ -0,0 +1,41 @@
+package de.oaa.xxxbdsmgame.ui.register;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.DialogFragment;
+
+import com.example.xxxbdsmgame.R;
+
+import de.oaa.xxxbdsmgame.ui.login.LoginActivity;
+
+public class RegisterSuccessDialog extends DialogFragment {
+
+    private RegisterResult result;
+
+    public RegisterSuccessDialog(RegisterResult result) {
+        this.result = result;
+    }
+
+    @NonNull
+    @Override
+    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+        builder.setMessage(R.string.check_email).setPositiveButton(R.string.ok,
+                new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        Intent intent = new Intent(getActivity(), LoginActivity.class);
+                        intent.putExtra("email", result.getEmail());
+                        intent.putExtra("password", result.getPassword());
+                        startActivity(intent);
+                    }
+                });
+        return builder.create();
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/register/RegisterUserView.java

@@ -0,0 +1,17 @@
+package de.oaa.xxxbdsmgame.ui.register;
+
+/**
+ * Class exposing authenticated user details to the UI.
+ */
+class RegisterUserView {
+    private String displayName;
+    //... other data fields that may be accessible to the UI
+
+    RegisterUserView(String displayName) {
+        this.displayName = displayName;
+    }
+
+    String getDisplayName() {
+        return displayName;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/register/RegisterViewModel.java

@@ -0,0 +1,76 @@
+package de.oaa.xxxbdsmgame.ui.register;
+
+import android.util.Patterns;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import com.example.xxxbdsmgame.R;
+
+import de.oaa.xxxbdsmgame.data.RegisterRepository;
+import de.oaa.xxxbdsmgame.data.Result;
+
+
+public class RegisterViewModel extends ViewModel {
+
+    private MutableLiveData<RegisterFormState> registerFormState = new MutableLiveData<>();
+    private MutableLiveData<RegisterResult> registerResult = new MutableLiveData<>();
+    private RegisterRepository repository;
+
+    RegisterViewModel(RegisterRepository loginRepository) {
+        this.repository = loginRepository;
+    }
+
+    LiveData<RegisterFormState> getRegisterFormState() {
+        return registerFormState;
+    }
+
+    LiveData<RegisterResult> getRegisterResult() {
+        return registerResult;
+    }
+
+    public void register(String name, String email, String password) {
+        // can be launched in a separate asynchronous job
+        Result<Boolean> result = repository.register(name, email, password);
+
+        if (result.getData() != null && result.getData()) {
+            registerResult.setValue(new RegisterResult(email, password));
+        } else {
+            registerResult.setValue(new RegisterResult(R.string.register_failed));
+        }
+    }
+
+    public void registerDataChanged(String name, String email, String password) {
+        if (!isNameValid(name)) {
+            registerFormState.setValue(new RegisterFormState(R.string.invalid_name, null, null));
+        } else if (!isEmailValid(email)) {
+            registerFormState.setValue(new RegisterFormState(null, R.string.invalid_email, null));
+        } else if (!isPasswordValid(password)) {
+            registerFormState.setValue(new RegisterFormState(null, null, R.string.invalid_password));
+        } else {
+            registerFormState.setValue(new RegisterFormState(true));
+        }
+    }
+
+    // A placeholder username validation check
+    private boolean isEmailValid(String email) {
+        if (email == null) {
+            return false;
+        }
+        if (email.contains("@")) {
+            return Patterns.EMAIL_ADDRESS.matcher(email).matches();
+        } else {
+            return !email.trim().isEmpty();
+        }
+    }
+
+    private boolean isNameValid(String name) {
+        return name != null && name.length() > 6;
+    }
+
+    // A placeholder password validation check
+    private boolean isPasswordValid(String password) {
+        return password != null && password.trim().length() > 6;
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/register/RegisterViewModelFactory.java

@@ -0,0 +1,25 @@
+package de.oaa.xxxbdsmgame.ui.register;
+
+import androidx.lifecycle.ViewModel;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.annotation.NonNull;
+
+import de.oaa.xxxbdsmgame.data.RegisterRepository;
+
+/**
+ * ViewModel provider factory to instantiate LoginViewModel.
+ * Required given LoginViewModel has a non-empty constructor
+ */
+public class RegisterViewModelFactory implements ViewModelProvider.Factory {
+
+    @NonNull
+    @Override
+    @SuppressWarnings("unchecked")
+    public <T extends ViewModel> T create(@NonNull Class<T> modelClass) {
+        if (modelClass.isAssignableFrom(RegisterViewModel.class)) {
+            return (T) new RegisterViewModel(RegisterRepository.getInstance());
+        } else {
+            throw new IllegalArgumentException("Unknown ViewModel class");
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/sets/SetsActivity.java

@@ -0,0 +1,164 @@
+package de.oaa.xxxbdsmgame.ui.sets;
+
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.view.View;
+import android.widget.CompoundButton;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.example.xxxbdsmgame.R;
+import com.example.xxxbdsmgame.databinding.ActivitySetsBinding;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.oaa.xxxbdsmgame.data.Result;
+import de.oaa.xxxbdsmgame.data.sets.FavoritenRepository;
+import de.oaa.xxxbdsmgame.data.sets.SetsRepository;
+import de.oaa.xxxbdsmgame.ui.gruppe.anzeige.GruppeAnzeigenActivity;
+import de.oaa.xxxbdsmgame.util.TokenHelper;
+
+
+public class SetsActivity extends AppCompatActivity implements SetsListViewAdapter.ItemClickListener {
+    private SetsRepository setsRepository;
+    private FavoritenRepository favoritenRepository;
+
+    private ActivitySetsBinding binding;
+    private SetsListViewAdapter adapter;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        boolean all = getIntent().getBooleanExtra("all", Boolean.FALSE);
+
+        binding = ActivitySetsBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+
+        String token = TokenHelper.getToken(getApplicationContext());
+        setsRepository = SetsRepository.getInstance(token);
+        favoritenRepository = FavoritenRepository.getInstance(token);
+        RecyclerView listView = findViewById(R.id.listView);
+
+        Result<JSONObject> result = all ? setsRepository.getAlle(null) : setsRepository.getEigene();
+        List<JSONObject> gruppen = new ArrayList<>();
+        if (result.getData() != null) {
+            try {
+                JSONArray gruppenJson = result.getData().getJSONArray("gruppen");
+                for (int i = 0; i < gruppenJson.length(); i++) {
+                    JSONObject jsonObject = gruppenJson.getJSONObject(i);
+                    gruppen.add(jsonObject);
+                }
+            } catch (JSONException e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        listView.setLayoutManager(new LinearLayoutManager(this));
+        adapter = new SetsListViewAdapter(this, gruppen, favoritenRepository.get());
+        adapter.setClickListener(this);
+        adapter.setParent(this);
+        listView.setAdapter(adapter);
+
+        EditText searchField = binding.searchField;
+        searchField.addTextChangedListener(new TextWatcher() {
+
+            private long letzteBeabeitung;
+
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+
+            }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) {
+                letzteBeabeitung = System.currentTimeMillis();
+                new Thread(() -> {
+                    try {
+                        Thread.sleep(1000);
+                        if (letzteBeabeitung + 1000 > System.currentTimeMillis()) {
+                            doSearch();
+                        }
+                    } catch (InterruptedException e) {
+                        throw new RuntimeException(e);
+                    }
+                }).start();
+            }
+
+            private void doSearch() {
+                SetsActivity.this.runOnUiThread(new Runnable() {
+                    public void run() {
+                        Result<JSONObject> filtered = all ? setsRepository.getAlle(searchField.getText().toString()) : setsRepository.getEigene();
+                        List<JSONObject> gruppen = new ArrayList<>();
+                        if (filtered.getData() != null) {
+                            try {
+                                JSONArray gruppenJson = filtered.getData().getJSONArray("gruppen");
+                                for (int i = 0; i < gruppenJson.length(); i++) {
+                                    JSONObject jsonObject = gruppenJson.getJSONObject(i);
+                                    gruppen.add(jsonObject);
+                                }
+                            } catch (JSONException e) {
+                                throw new RuntimeException(e);
+                            }
+                        }
+
+                        listView.setLayoutManager(new LinearLayoutManager(SetsActivity.this));
+                        adapter = new SetsListViewAdapter(SetsActivity.this, gruppen, favoritenRepository.get());
+                        adapter.setClickListener(SetsActivity.this);
+                        adapter.setParent(SetsActivity.this);
+                        listView.setAdapter(adapter);
+                    }
+                });
+            }
+        });
+    }
+
+    @Override
+    public void onItemClick(View view, int position) {
+
+    }
+
+    @Override
+    public void onPointerCaptureChanged(boolean hasCapture) {
+        super.onPointerCaptureChanged(hasCapture);
+    }
+
+    void favoritChanged(JSONObject object, boolean isChecked) {
+        try {
+            if (isChecked) {
+                favoritenRepository.add(object.getString("gruppenId"));
+            } else {
+                favoritenRepository.remove(object.getString("gruppenId"));
+            }
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    void gruppeCliecked(JSONObject object) {
+        try {
+            Intent intent =new Intent(this, GruppeAnzeigenActivity.class);
+            intent.putExtra("gruppeId", object.getString("gruppenId"));
+            startActivity(intent);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/ui/sets/SetsListViewAdapter.java

@@ -0,0 +1,139 @@
+package de.oaa.xxxbdsmgame.ui.sets;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.drawable.Icon;
+import android.os.Build;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.CompoundButton;
+import android.widget.ImageView;
+import android.widget.Switch;
+import android.widget.TextView;
+
+import androidx.annotation.RequiresApi;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.example.xxxbdsmgame.R;
+
+import org.json.JSONObject;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.util.Base64;
+import java.util.List;
+import java.util.UUID;
+
+public class SetsListViewAdapter extends RecyclerView.Adapter<SetsListViewAdapter.ViewHolder> {
+
+    private List<JSONObject> mData;
+
+    private List<UUID> favoriten;
+    private LayoutInflater mInflater;
+    private ItemClickListener mClickListener;
+    private SetsActivity parent;
+
+    // data is passed into the constructor
+    SetsListViewAdapter(Context context, List<JSONObject> data, List<UUID> favoriten) {
+        this.mInflater = LayoutInflater.from(context);
+        this.mData = data;
+        this.favoriten = favoriten;
+    }
+
+    // inflates the row layout from xml when needed
+    @Override
+    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        View view = mInflater.inflate(R.layout.sets_row, parent, false);
+        return new ViewHolder(view);
+    }
+
+    // binds the data to the TextView in each row
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    @Override
+    public void onBindViewHolder(ViewHolder holder, int position) {
+        try {
+            JSONObject object = mData.get(position);
+            holder.name.setText(object.getString("name"));
+            holder.beschreibung.setText(object.getString("beschreibung"));
+            byte[] blob = Base64.getDecoder().decode(object.getString("bild"));
+            Bitmap bmp= BitmapFactory.decodeByteArray(blob,0,blob.length);
+            holder.bild.setImageIcon(Icon.createWithBitmap(bmp));
+            holder.object = object;
+            if (favoriten.contains(UUID.fromString(object.getString("gruppenId")))) {
+                holder.fav.setChecked(true);
+            }
+            holder.von.setText(object.getString("von"));
+        } catch (Exception exception) {
+            throw new RuntimeException(exception);
+        }
+    }
+
+    // total number of rows
+    @Override
+    public int getItemCount() {
+        return mData.size();
+    }
+
+    public JSONObject getItem(int position) {
+        return mData.get(position);
+    }
+
+    public void setParent(SetsActivity parent) {
+        this.parent = parent;
+    }
+
+
+    // stores and recycles views as they are scrolled off screen
+    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, CompoundButton.OnCheckedChangeListener {
+        ImageView bild;
+
+        TextView name;
+
+        TextView beschreibung;
+
+        TextView von;
+
+        Switch fav;
+
+        JSONObject object;
+
+        ViewHolder(View itemView) {
+            super(itemView);
+            bild = itemView.findViewById(R.id.gruppeBild);
+            name = itemView.findViewById(R.id.gruppeName);
+            fav = itemView.findViewById(R.id.favSwitch);
+            beschreibung = itemView.findViewById((R.id.gruppeText));
+            von = itemView.findViewById(R.id.gruppeVonText);
+
+            itemView.setOnClickListener(this);
+            fav.setOnCheckedChangeListener(this);
+        }
+
+        @Override
+        public void onClick(View view) {
+            if (mClickListener != null) {
+                parent.gruppeCliecked(object);
+            }
+        }
+
+        @Override
+        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+            if(buttonView.isPressed()) {
+                parent.favoritChanged(object, isChecked);
+            }
+        }
+    }
+
+    // allows clicks events to be caught
+    void setClickListener(ItemClickListener itemClickListener) {
+        this.mClickListener = itemClickListener;
+    }
+
+
+    // parent activity will implement this method to respond to click events
+    public interface ItemClickListener {
+        void onItemClick(View view, int position);
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/util/PasswordHelper.java

@@ -0,0 +1,22 @@
+package de.oaa.xxxbdsmgame.util;
+
+import java.security.MessageDigest;
+
+public class PasswordHelper {
+
+    public static String hashPassword(String password) {
+        try {
+            MessageDigest md = MessageDigest.getInstance("MD5");
+            md.update(password.getBytes());
+            byte[] bytes = md.digest();
+
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < bytes.length; i++) {
+                sb.append(Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1));
+            }
+            return sb.toString();
+        } catch (Exception exception) {
+            return null;
+        }
+    }
+}

app/src/main/java/de/oaa/xxxbdsmgame/util/TokenHelper.java

@@ -0,0 +1,36 @@
+package de.oaa.xxxbdsmgame.util;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+
+public class TokenHelper {
+
+    private TokenHelper() {
+    }
+
+    public static String getToken(Context context) {
+        SharedPreferences prefs = context.getSharedPreferences("XXXTOKEN", 0);
+        Map<String, ?> map= prefs.getAll();
+        Optional<? extends Map.Entry<String, ?>> first =
+                map.entrySet().stream().filter(entry -> entry.getKey().equals("token")).findFirst();
+        return first.isPresent() ? first.get().getValue().toString() : null;
+    }
+
+    public static void storeToken(String token, Context context) {
+        SharedPreferences prefs = context.getSharedPreferences("XXXTOKEN", 0);
+        SharedPreferences.Editor editor = prefs.edit();
+        editor.putString("token", token);
+        editor.apply();
+    }
+
+    public static void deleteToken(Context context) {
+        SharedPreferences prefs = context.getSharedPreferences("XXXTOKEN", 0);
+        SharedPreferences.Editor editor = prefs.edit();
+        editor.remove("token");
+        editor.apply();
+    }
+}

app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

app/src/main/res/layout/activity_gruppe_anzeigen.xml

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical" >
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:padding="0dp">
+
+        <ImageView
+            android:id="@+id/aufgabeBild"
+            android:layout_width="128px"
+            android:layout_height="128px"
+            android:layout_marginTop="20dp"
+            android:layout_marginBottom="20dp"
+            android:layout_weight="0"
+            tools:srcCompat="@tools:sample/avatars" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical">
+
+            <TextView
+                android:id="@+id/aufgabeName"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_vertical"
+                android:layout_marginLeft="10dp"
+                android:layout_marginRight="10dp"
+                android:layout_weight="1"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/aufgabeText"
+                android:layout_width="match_parent"
+                android:layout_height="63dp"
+                android:layout_marginLeft="10dp"
+                android:layout_marginRight="10dp"
+                android:layout_weight="1" />
+        </LinearLayout>
+
+        <Space
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="0" />
+
+    </LinearLayout>
+
+    <androidx.viewpager2.widget.ViewPager2
+        android:id="@+id/pager"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+
+</LinearLayout>

app/src/main/res/layout/activity_login.xml

@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/list"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    tools:context="de.oaa.xxxbdsmgame.ui.login.LoginActivity">
+
+    <EditText
+        android:id="@+id/email"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="96dp"
+        android:hint="@string/prompt_email"
+        android:inputType="textEmailAddress"
+        android:selectAllOnFocus="true"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <EditText
+        android:id="@+id/password"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:hint="@string/prompt_password"
+        android:imeActionLabel="@string/action_sign_in_short"
+        android:imeOptions="actionDone"
+        android:inputType="textPassword"
+        android:selectAllOnFocus="true"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/email" />
+
+    <Button
+        android:id="@+id/login"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="start"
+        android:layout_marginTop="16dp"
+        android:layout_marginBottom="64dp"
+        android:enabled="false"
+        android:text="@string/action_sign_in"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/password"
+        app:layout_constraintVertical_bias="0.2" />
+
+    <ProgressBar
+        android:id="@+id/loading"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:layout_marginTop="64dp"
+        android:layout_marginBottom="64dp"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="@+id/password"
+        app:layout_constraintStart_toStartOf="@+id/password"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.3" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_menu.xml

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/list"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:textAlignment="center"
+    tools:context="de.oaa.xxxbdsmgame.ui.menu.MenuActivity">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/menuLbl"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/title_activity_menu"
+            android:textAlignment="center"
+            android:textSize="20sp" />
+
+        <Button
+            android:id="@+id/buttonProfile"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:text="@string/action_profile" />
+
+        <Button
+            android:id="@+id/buttonSettings"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/action_settings" />
+
+        <Button
+            android:id="@+id/buttonSets"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/action_sets" />
+
+        <Button
+            android:id="@+id/buttonOwnSets"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/action_own_sets" />
+
+        <Button
+            android:id="@+id/buttonNewGame"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:text="@string/action_newgame" />
+    </LinearLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_register.xml

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/list"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    tools:context="de.oaa.xxxbdsmgame.ui.register.RegisterActivity">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginTop="96dp"
+        android:orientation="vertical"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:layout_editor_absoluteX="16dp">
+
+        <EditText
+            android:id="@+id/name"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="@string/promt_name"
+            android:inputType="text"
+            android:selectAllOnFocus="true" />
+
+        <EditText
+            android:id="@+id/email"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="@string/prompt_email"
+            android:inputType="textEmailAddress"
+            android:selectAllOnFocus="true" />
+
+        <EditText
+            android:id="@+id/password"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="@string/prompt_password"
+            android:imeActionLabel="@string/action_sign_in_short"
+            android:imeOptions="actionDone"
+            android:inputType="textPassword"
+            android:selectAllOnFocus="true" />
+
+        <Button
+            android:id="@+id/login"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal|center_vertical"
+            android:layout_marginTop="80dp"
+            android:layout_marginBottom="64dp"
+            android:enabled="false"
+            android:text="@string/action_register" />
+
+    </LinearLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_sets.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/list"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    tools:context="de.oaa.xxxbdsmgame.ui.sets.SetsActivity">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <EditText
+            android:id="@+id/searchField"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:ems="10"
+            android:hint="@string/promt_search"
+            android:inputType="text" />
+
+        <ScrollView
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical">
+
+                <androidx.recyclerview.widget.RecyclerView
+                    android:id="@+id/listView"
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent" />
+            </LinearLayout>
+        </ScrollView>
+    </LinearLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_sets/sets_view_row.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/fragment_aufgaben_anzeige.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/list"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    tools:context="de.oaa.xxxbdsmgame.ui.gruppe.anzeige.GruppeAnzeigenActivity">
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical" >
+
+            <androidx.recyclerview.widget.RecyclerView
+                android:layout_width="match_parent"
+                android:layout_height="match_parent" />
+        </LinearLayout>
+    </ScrollView>
+
+</LinearLayout>

app/src/main/res/layout/fragment_toys_anzeige.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="de.oaa.xxxbdsmgame.ui.gruppe.anzeige.GruppeAnzeigenActivity">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/text_margin"
+        android:text="Text" />
+</androidx.core.widget.NestedScrollView>

app/src/main/res/layout/sets_aufgaben_anzeigen.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="horizontal"
+    android:padding="0dp">
+
+    <ImageView
+        android:id="@+id/aufgabeBild"
+        android:layout_width="128px"
+        android:layout_height="128px"
+        android:layout_marginTop="20dp"
+        android:layout_marginBottom="20dp"
+        android:layout_weight="0"
+        tools:srcCompat="@tools:sample/avatars" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/aufgabeName"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:layout_marginLeft="10dp"
+            android:layout_marginRight="10dp"
+            android:layout_weight="1"
+            android:textSize="20sp" />
+
+        <TextView
+            android:id="@+id/aufgabeText"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="10dp"
+            android:layout_marginRight="10dp"
+            android:layout_weight="1" />
+    </LinearLayout>
+
+    <Space
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_weight="0" />
+
+</LinearLayout>

app/src/main/res/layout/sets_row.xml

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="horizontal"
+    android:padding="0dp">
+
+    <ImageView
+        android:id="@+id/gruppeBild"
+        android:layout_width="128px"
+        android:layout_height="128px"
+        android:layout_marginTop="20dp"
+        android:layout_marginBottom="20dp"
+        android:layout_weight="0"
+        tools:srcCompat="@tools:sample/avatars" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:orientation="vertical"
+        tools:layout_gravity="fill">
+
+        <TextView
+            android:id="@+id/gruppeName"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:layout_marginLeft="10dp"
+            android:layout_marginRight="10dp"
+            android:layout_weight="0"
+            android:textSize="20sp" />
+
+        <TextView
+            android:id="@+id/gruppeText"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="10dp"
+            android:layout_marginRight="10dp"
+            android:layout_weight="1" />
+
+        <TextView
+            android:id="@+id/gruppeVonText"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="10dp"
+            android:layout_marginRight="10dp"
+            android:layout_weight="1"
+            android:textAlignment="textEnd" />
+    </LinearLayout>
+
+    <Switch
+        android:id="@+id/favSwitch"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal|center_vertical"
+        android:layout_weight="0"
+        android:textAlignment="center" />
+
+    <Space
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_weight="0" />
+
+</LinearLayout>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v33/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/values-land/dimens.xml

@@ -0,0 +1,5 @@
+<resources>
+    <dimen name="activity_horizontal_margin">48dp</dimen>
+    <dimen name="fab_margin">48dp</dimen>
+    <dimen name="text_margin">48dp</dimen>
+</resources>

app/src/main/res/values-night/themes.xml

@@ -0,0 +1,21 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.XXXBDSMGame" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+
+    <style name="ThemeOverlay.XXXBDSMGame.FullscreenContainer" parent="">
+        <item name="fullscreenBackgroundColor">@color/light_blue_900</item>
+        <item name="fullscreenTextColor">@color/light_blue_A400</item>
+    </style>
+</resources>

app/src/main/res/values-w1240dp/dimens.xml

@@ -0,0 +1,4 @@
+<resources>
+    <dimen name="activity_horizontal_margin">200dp</dimen>
+    <dimen name="fab_margin">200dp</dimen>
+</resources>

app/src/main/res/values-w600dp/dimens.xml

@@ -0,0 +1,5 @@
+<resources>
+    <dimen name="activity_horizontal_margin">48dp</dimen>
+    <dimen name="fab_margin">48dp</dimen>
+    <dimen name="text_margin">48dp</dimen>
+</resources>

app/src/main/res/values-w820dp/dimens.xml

@@ -0,0 +1,6 @@
+<resources>
+    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>

app/src/main/res/values/attrs.xml

@@ -0,0 +1,6 @@
+<resources>
+    <declare-styleable name="FullscreenAttrs">
+        <attr name="fullscreenBackgroundColor" format="color" />
+        <attr name="fullscreenTextColor" format="color" />
+    </declare-styleable>
+</resources>

app/src/main/res/values/colors.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+    <color name="light_blue_600">#FF039BE5</color>
+    <color name="light_blue_900">#FF01579B</color>
+    <color name="light_blue_A200">#FF40C4FF</color>
+    <color name="light_blue_A400">#FF00B0FF</color>
+    <color name="black_overlay">#66000000</color>
+</resources>

app/src/main/res/values/dimens.xml

@@ -0,0 +1,10 @@
+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+    <dimen name="fab_margin">16dp</dimen>
+    <dimen name="app_bar_height">180dp</dimen>
+    <dimen name="text_margin">16dp</dimen>
+    <dimen name="appbar_padding">16dp</dimen>
+    <dimen name="appbar_padding_top">8dp</dimen>
+</resources>

app/src/main/res/values/strings.xml

@@ -0,0 +1,38 @@
+<resources>
+    <string name="app_name">XXX BDSM-Game</string>
+    <!-- Strings related to login-->
+    <string name="promt_name">Nickname</string>
+    <string name="prompt_email">E-Mail</string>
+    <string name="prompt_password">Passwort</string>
+    <string name="action_sign_in">Anmelden oder Registrieren</string>
+    <string name="action_sign_in_short">Anmeldung</string>
+    <string name="welcome">"Welcome !"</string>
+    <string name="invalid_name">Kein valider Name</string>
+    <string name="invalid_email">Keine valide E-Mail-Adresse</string>
+    <string name="invalid_password">Das Passwort muss aus mindestens 6 Zeichen bestehen</string>
+    <string name="login_failed">"Login gescheitert"</string>
+    <string name="register_failed">Registrierung gescheitert, bitte versuche es später noch einmal.</string>
+    <string name="title_activity_register">Registrierung</string>
+    <string name="action_register">Registrieren</string>
+    <string name="dummy_button">Dummy Button</string>
+    <string name="dummy_content">DUMMY\nCONTENT</string>
+    <string name="check_email">Wir haben dir eine E-Mail gesendet. Bitte prüfe deine E-Mails und bestätige deine E-Mail-Adresse.</string>
+    <string name="ok">OK</string>
+    <string name="back">Zurück</string>
+    <string name="title_activity_menu">Hauptmenü</string>
+    <string name="action_profile">Profil</string>
+    <string name="action_settings">Einstellungen</string>
+    <string name="action_sets">Aufgabensets</string>
+    <string name="action_own_sets">Eigene Sets</string>
+    <string name="action_newgame">Neues Spiel</string>
+    <string name="title_activity_sets">Aufgabensets</string>
+    <string name="promt_search">Suche</string>
+    <string name="invalid_username">Not a valid username</string>
+    <string name="title_activity_gruppe_anzeigen">GruppeAnzeigenActivity</string>
+    <string name="tab_text_toys">Toys</string>
+    <string name="tab_text_tasks">Aufgaben</string>
+    <string name="hello_blank_fragment">Hello blank fragment</string>
+
+
+
+</resources>

app/src/main/res/values/styles.xml

@@ -0,0 +1,11 @@
+<resources>
+
+    <style name="Widget.Theme.XXXBDSMGame.ActionBar.Fullscreen" parent="Widget.AppCompat.ActionBar">
+        <item name="android:background">@color/black_overlay</item>
+    </style>
+
+    <style name="Widget.Theme.XXXBDSMGame.ButtonBar.Fullscreen" parent="">
+        <item name="android:background">@color/black_overlay</item>
+        <item name="android:buttonBarStyle">?android:attr/buttonBarStyle</item>
+    </style>
+</resources>

app/src/main/res/values/themes.xml

@@ -0,0 +1,37 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.XXXBDSMGame" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+
+    <style name="Theme.XXXBDSMGame.Fullscreen" parent="Theme.XXXBDSMGame">
+        <item name="android:actionBarStyle">@style/Widget.Theme.XXXBDSMGame.ActionBar.Fullscreen
+        </item>
+        <item name="android:windowActionBarOverlay">true</item>
+        <item name="android:windowBackground">@null</item>
+    </style>
+
+    <style name="ThemeOverlay.XXXBDSMGame.FullscreenContainer" parent="">
+        <item name="fullscreenBackgroundColor">@color/light_blue_600</item>
+        <item name="fullscreenTextColor">@color/light_blue_A200</item>
+    </style>
+
+    <style name="Theme.XXXBDSMGame.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="Theme.XXXBDSMGame.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+
+    <style name="Theme.XXXBDSMGame.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+</resources>

app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older that API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>

app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>

app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="true">10.0.2.2</domain>
+    </domain-config>
+</network-security-config>

build.gradle

@@ -0,0 +1,5 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+plugins {
+    id 'com.android.application' version '7.4.2' apply false
+    id 'com.android.library' version '7.4.2' apply false
+}

gradle.properties

@@ -0,0 +1,21 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app's APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Enables namespacing of each library's R class so that its R class includes only the
+# resources declared in the library itself and none from the library's dependencies,
+# thereby reducing the size of the R class for that library
+android.nonTransitiveRClass=true

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Mon Mar 27 19:24:03 CEST 2023
+distributionBase=GRADLE_USER_HOME
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
+distributionPath=wrapper/dists
+zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,16 @@
+pluginManagement {
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+rootProject.name = "XXX BDSM Game"
+include ':app'