Init push

.gitignore

+/build

build.gradle

+plugins {
+    id 'com.android.application'
+}
+
+android {
+
+
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        applicationId "com.example.erdbebensender"
+        minSdkVersion 29
+        targetSdkVersion 30
+        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
+    }
+}
+
+dependencies {
+
+    compileOnly "org.projectlombok:lombok:1.18.20"
+
+    implementation 'androidx.appcompat:appcompat:1.3.0'
+    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'androidx.navigation:navigation-fragment:2.3.5'
+    implementation 'androidx.navigation:navigation-ui:2.3.5'
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+
+    implementation 'com.android.volley:volley:1.2.0'
+
+}

proguard-rules.pro

+# 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

src/androidTest/java/com/example/erdbebensender/ExampleInstrumentedTest.java

+package com.example.erdbebensender;
+
+import android.content.Context;
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.example.erdbebensender", appContext.getPackageName());
+    }
+}

src/main/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.example.erdbebensender">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+
+
+    <application
+            android:allowBackup="true"
+            android:icon="@mipmap/ic_launcher"
+            android:label="@string/app_name"
+            android:roundIcon="@mipmap/ic_launcher_round"
+            android:supportsRtl="true"
+            android:theme="@style/Theme.ErdbebenSender">
+        <activity
+                android:name=".MainActivity"
+                android:label="@string/app_name"
+                android:theme="@style/Theme.ErdbebenSender.NoActionBar">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

src/main/java/com/example/erdbebensender/ErdbebenParameter.java

+package com.example.erdbebensender;
+
+
+
+
+public class ErdbebenParameter {
+
+    public String sender;
+    public String x;
+    public String y;
+    public String v;
+
+
+
+    public String getSender() {
+        return sender;
+    }
+
+    public void setSender(String sender) {
+        this.sender = sender;
+    }
+
+    public String getX() {
+        return x;
+    }
+
+    public void setX(String x) {
+        this.x = x;
+    }
+
+    public String getY() {
+        return y;
+    }
+
+    public void setY(String y) {
+        this.y = y;
+    }
+
+    public String getV() {
+        return v;
+    }
+
+    public void setV(String v) {
+        this.v = v;
+    }
+}

src/main/java/com/example/erdbebensender/FirstFragment.java

+package com.example.erdbebensender;
+
+import android.os.Bundle;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import com.android.volley.RequestQueue;
+import com.android.volley.toolbox.Volley;
+import lombok.SneakyThrows;
+
+public class FirstFragment extends Fragment {
+
+    private static final String TAG = "MessageSender";
+    MessageSender messageSender = new MessageSender();
+
+    @Override
+    public View onCreateView(
+            LayoutInflater inflater, ViewGroup container,
+            Bundle savedInstanceState
+    ) {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_first, container, false);
+    }
+
+    public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+
+        view.findViewById(R.id.button_first).setOnClickListener(new View.OnClickListener() {
+
+            @Override
+            public void onClick(View view) {
+                try {
+                    ErdbebenParameter erdbebebenParam = new ErdbebenParameter();
+                    erdbebebenParam.setX("200");
+                    erdbebebenParam.setY("200");
+                    erdbebebenParam.setV("10");
+                    erdbebebenParam.setSender("TOKEN");
+                    //messageSender.sendMessage(erdbebebenParam);
+                }
+                catch (Exception e)
+                {
+                    Log.i("ErdbebenMessage", "Fehler aufgetretten");
+                }
+
+            }
+        });
+    }
+}

src/main/java/com/example/erdbebensender/MainActivity.java

+package com.example.erdbebensender;
+
+import android.os.Bundle;
+import com.android.volley.RequestQueue;
+import com.android.volley.toolbox.Volley;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import android.view.View;
+
+import android.view.Menu;
+import android.view.MenuItem;
+
+import java.io.IOException;
+
+public class MainActivity extends AppCompatActivity {
+
+
+    public MainActivity() throws IOException {
+
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+
+        FloatingActionButton fab = findViewById(R.id.fab);
+        fab.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+
+                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
+                        .setAction("Action", null).show();
+            }
+        });
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // Inflate the menu; this adds items to the action bar if it is present.
+        getMenuInflater().inflate(R.menu.menu_main, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        // Handle action bar item clicks here. The action bar will
+        // automatically handle clicks on the Home/Up button, so long
+        // as you specify a parent activity in AndroidManifest.xml.
+        int id = item.getItemId();
+
+        //noinspection SimplifiableIfStatement
+        if (id == R.id.action_settings) {
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+}

src/main/java/com/example/erdbebensender/MessageSender.java

+package com.example.erdbebensender;
+
+import android.content.Context;
+import android.nfc.Tag;
+import android.util.Log;
+import com.android.volley.*;
+import com.android.volley.toolbox.*;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.*;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+
+
+public class MessageSender {
+
+    private static final String FCM_API = "https://fcm.googleapis.com/fcm/send";
+    private static final String TOPIC = "erdbeben";
+    private static final String SERVER_KEY = "AAAA2pVhMk4:APA91bHeiZGBd0BZi-RqnlCqnMkD7ICFW7SKzft-j1RIm16LX4M0Jez8AUQOoGgKYhHsVDD1kDxfKnul9Xbcjwo6QDAnPNLqOnk3XViVI5HjxgL8mpyzDLZXFharMIaqPANqBiMs5Gm2";
+
+    private static final String TAG = "ErdbebenMessage";
+
+
+    public void sendMessage(ErdbebenParameter erdbebenParameter) throws IOException, JSONException {
+        URL url = new URL(FCM_API);
+        HttpURLConnection con = (HttpURLConnection) url.openConnection();
+        try {
+            Log.i(TAG, "Init HTTP Request");
+            con.setRequestMethod("POST");
+            con.setRequestProperty("Content-Type", "application/json");
+            //con.setRequestProperty("Accept", "application/json");
+            con.setRequestProperty("Authorization", "key=" + SERVER_KEY);
+            con.setDoOutput(true);
+            //con.setChunkedStreamingMode(0);
+            Log.i(TAG, "---Fehlerstelle kommt----");
+            OutputStream out = new BufferedOutputStream(con.getOutputStream());
+            Log.i(TAG, "---Fehler behoben---");
+            out.write("Test".getBytes(),0, "Test".getBytes().length);
+            out.flush();
+            out.close();
+
+            Log.i(TAG, "Request Erfolgreich gesendet");
+
+            try (BufferedReader br = new BufferedReader(
+                    new InputStreamReader(con.getInputStream(), "utf-8"))) {
+                StringBuilder response = new StringBuilder();
+                String responseLine = null;
+                while ((responseLine = br.readLine()) != null) {
+                    response.append(responseLine.trim());
+                }
+                Log.i(TAG, "Response erhalten: ");
+            }
+
+        } catch (Exception e) {
+            throw e;
+        }
+        finally {
+            con.disconnect();
+        }
+    }
+
+    private JSONObject generateJson(ErdbebenParameter erdbebenParameter) throws JSONException {
+        Log.i(TAG, "Erstelle JSON");
+        JSONObject json = new JSONObject();
+        JSONObject data = new JSONObject();
+        JSONObject notification = new JSONObject();
+
+        notification.put("title", "Erdbeben");
+        notification.put("body", "Neues Erdbebeben aufgetretten");
+        data.put("sender", erdbebenParameter.getSender());
+        data.put("x", erdbebenParameter.getX());
+        data.put("y", erdbebenParameter.getY());
+        data.put("v", erdbebenParameter.getV());
+
+        json.put("to", "/topics/" + TOPIC);
+        json.put("notification", notification);
+        json.put("data", data);
+
+        return json;
+    }
+}

src/main/java/com/example/erdbebensender/SecondFragment.java

+package com.example.erdbebensender;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.navigation.fragment.NavHostFragment;
+
+public class SecondFragment extends Fragment {
+
+    @Override
+    public View onCreateView(
+            LayoutInflater inflater, ViewGroup container,
+            Bundle savedInstanceState
+    ) {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_second, container, false);
+    }
+
+    public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+
+        view.findViewById(R.id.button_second).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                NavHostFragment.findNavController(SecondFragment.this)
+                        .navigate(R.id.action_SecondFragment_to_FirstFragment);
+            }
+        });
+    }
+}

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

+<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:startY="49.59793"
+                    android:startX="42.9492"
+                    android:endY="92.4963"
+                    android:endX="85.84757"
+                    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: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:fillColor="#FFFFFF"
+            android:fillType="nonZero"
+            android:strokeWidth="1"
+            android:strokeColor="#00000000"/>
+</vector>

src/main/res/drawable/ic_launcher_background.xml

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

src/main/res/layout/activity_main.xml

+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout
+        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="match_parent"
+        tools:context=".MainActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+            android:layout_height="wrap_content"
+            android:layout_width="match_parent"
+            android:theme="@style/Theme.ErdbebenSender.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+                android:id="@+id/toolbar"
+                android:layout_width="match_parent"
+                android:layout_height="?attr/actionBarSize"
+                android:background="?attr/colorPrimary"
+                app:popupTheme="@style/Theme.ErdbebenSender.PopupOverlay"/>
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <include layout="@layout/content_main"/>
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+            android:id="@+id/fab"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="bottom|end"
+            android:layout_margin="@dimen/fab_margin"
+            app:srcCompat="@android:drawable/ic_dialog_email"/>
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

src/main/res/layout/content_main.xml

+<?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"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
+    <fragment
+            android:id="@+id/nav_host_fragment"
+            android:name="androidx.navigation.fragment.NavHostFragment"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            app:layout_constraintLeft_toLeftOf="parent"
+            app:layout_constraintRight_toRightOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:defaultNavHost="true"
+            app:navGraph="@navigation/nav_graph"/>
+</androidx.constraintlayout.widget.ConstraintLayout>

src/main/res/layout/fragment_first.xml

+<?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:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:context=".FirstFragment">
+
+    <TextView
+            android:id="@+id/textview_first"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/hello_first_fragment"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintBottom_toTopOf="@id/button_first"
+    />
+
+    <Button
+            android:id="@+id/button_first"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/next"
+            app:layout_constraintTop_toBottomOf="@id/textview_first"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"
+    />
+</androidx.constraintlayout.widget.ConstraintLayout>

src/main/res/layout/fragment_second.xml

+<?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:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:context=".SecondFragment">
+
+    <TextView
+            android:id="@+id/textview_second"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintBottom_toTopOf="@id/button_second"
+    />
+
+    <Button
+            android:id="@+id/button_second"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/previous"
+            app:layout_constraintTop_toBottomOf="@id/textview_second"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"
+    />
+</androidx.constraintlayout.widget.ConstraintLayout>

src/main/res/menu/menu_main.xml

+<menu 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"
+      tools:context="com.example.erdbebensender.MainActivity">
+    <item android:id="@+id/action_settings"
+          android:title="@string/action_settings"
+          android:orderInCategory="100"
+          app:showAsAction="never"/>
+</menu>

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

+<?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>

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

+<?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>

src/main/res/navigation/nav_graph.xml

+<?xml version="1.0" encoding="utf-8"?>
+<navigation 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/nav_graph"
+            app:startDestination="@id/FirstFragment">
+
+    <fragment
+            android:id="@+id/FirstFragment"
+            android:name="com.example.erdbebensender.FirstFragment"
+            android:label="@string/first_fragment_label"
+            tools:layout="@layout/fragment_first">
+
+        <action
+                android:id="@+id/action_FirstFragment_to_SecondFragment"
+                app:destination="@id/SecondFragment"/>
+    </fragment>
+    <fragment
+            android:id="@+id/SecondFragment"
+            android:name="com.example.erdbebensender.SecondFragment"
+            android:label="@string/second_fragment_label"
+            tools:layout="@layout/fragment_second">
+
+        <action
+                android:id="@+id/action_SecondFragment_to_FirstFragment"
+                app:destination="@id/FirstFragment"/>
+    </fragment>
+</navigation>

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

+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.ErdbebenSender" 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" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

src/main/res/values/colors.xml

+<?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>
+</resources>

src/main/res/values/dimens.xml

+<resources>
+    <dimen name="fab_margin">16dp</dimen>
+</resources>

src/main/res/values/strings.xml

+<resources>
+    <string name="app_name">ErdbebenSender</string>
+    <string name="action_settings">Settings</string>
+    <!-- Strings used for fragments for navigation -->
+    <string name="first_fragment_label">First Fragment</string>
+    <string name="second_fragment_label">Second Fragment</string>
+    <string name="next">Erdbeben</string>
+    <string name="previous">Previous</string>
+
+    <string name="hello_first_fragment">Hier kann ein Erdbeben ausgelöst werden</string>
+    <string name="hello_second_fragment">Hello second fragment. Arg: %1$s</string>
+</resources>

src/main/res/values/themes.xml

+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.ErdbebenSender" 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" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+    <style name="Theme.ErdbebenSender.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+    <style name="Theme.ErdbebenSender.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar"/>
+    <style name="Theme.ErdbebenSender.PopupOverlay" parent="ThemeOverlay.AppCompat.Light"/>
+</resources>

src/test/java/com/example/erdbebensender/ExampleUnitTest.java

+package com.example.erdbebensender;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}