added maps fragment and location access

Code Android/Test/meinWald/.gitignore

@@ -0,0 +1,14 @@
+*.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

Code Android/Test/meinWald/.idea/codeStyles/Project.xml

@@ -0,0 +1,116 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <codeStyleSettings language="XML">
+      <indentOptions>
+        <option name="CONTINUATION_INDENT_SIZE" value="4" />
+      </indentOptions>
+      <arrangement>
+        <rules>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>xmlns:android</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>^$</XML_NAMESPACE>
+                </AND>
+              </match>
+            </rule>
+          </section>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>xmlns:.*</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>^$</XML_NAMESPACE>
+                </AND>
+              </match>
+              <order>BY_NAME</order>
+            </rule>
+          </section>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>.*:id</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                </AND>
+              </match>
+            </rule>
+          </section>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>.*:name</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                </AND>
+              </match>
+            </rule>
+          </section>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>name</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>^$</XML_NAMESPACE>
+                </AND>
+              </match>
+            </rule>
+          </section>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>style</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>^$</XML_NAMESPACE>
+                </AND>
+              </match>
+            </rule>
+          </section>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>.*</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>^$</XML_NAMESPACE>
+                </AND>
+              </match>
+              <order>BY_NAME</order>
+            </rule>
+          </section>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>.*</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                </AND>
+              </match>
+              <order>ANDROID_ATTRIBUTE_ORDER</order>
+            </rule>
+          </section>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>.*</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>.*</XML_NAMESPACE>
+                </AND>
+              </match>
+              <order>BY_NAME</order>
+            </rule>
+          </section>
+        </rules>
+      </arrangement>
+    </codeStyleSettings>
+  </code_scheme>
+</component>

Code Android/Test/meinWald/.idea/gradle.xml

@@ -0,0 +1,21 @@
+<?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="PLATFORM" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="1.8" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveModulePerSourceSet" value="false" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

Code Android/Test/meinWald/.idea/jarRepositories.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="BintrayJCenter" />
+      <option name="name" value="BintrayJCenter" />
+      <option name="url" value="https://jcenter.bintray.com/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="Google" />
+      <option name="name" value="Google" />
+      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
+    </remote-repository>
+  </component>
+</project>

Code Android/Test/meinWald/.idea/misc.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CMakeSettings">
+    <configurations>
+      <configuration PROFILE_NAME="Debug" CONFIG_NAME="Debug" />
+    </configurations>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>

Code Android/Test/meinWald/.idea/runConfigurations.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>

Code Android/Test/meinWald/.idea/vcs.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../../.." vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>

Code Android/Test/meinWald/app/.gitignore

@@ -0,0 +1 @@
+/build

Code Android/Test/meinWald/app/build.gradle

@@ -0,0 +1,43 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 29
+    buildToolsVersion "29.0.3"
+
+    defaultConfig {
+        applicationId "com.example.meinwald"
+        minSdkVersion 16
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: "libs", include: ["*.jar"])
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'com.google.android.material:material:1.0.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.lifecycle:lifecycle-extensions:2.1.0'
+    implementation 'com.google.android.gms:play-services-maps:17.0.0'
+    implementation "androidx.viewpager2:viewpager2:1.0.0"
+    implementation 'com.google.firebase:firebase-database:19.3.0'
+    implementation 'com.android.volley:volley:1.1.1'
+    implementation 'com.google.firebase:firebase-messaging:20.2.0'
+    implementation 'com.google.android.gms:play-services-maps:17.0.0'
+    implementation 'com.google.android.libraries.places:places:2.2.0'
+
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+
+}

Code Android/Test/meinWald/app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# 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

Code Android/Test/meinWald/app/src/androidTest/java/com/example/meinwald/ExampleInstrumentedTest.java

@@ -0,0 +1,26 @@
+package com.example.meinwald;
+
+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.meinwald", appContext.getPackageName());
+    }
+}

Code Android/Test/meinWald/app/src/main/AndroidManifest.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.meinwald">
+
+    <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/AppTheme">
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name"
+            android:theme="@style/AppTheme.NoActionBar">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <meta-data
+            android:name="com.google.android.geo.API_KEY"
+            android:value="@string/google_maps_key" />
+    </application>
+
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+
+</manifest>

Code Android/Test/meinWald/app/src/main/java/com/example/meinwald/MainActivity.java

@@ -0,0 +1,39 @@
+package com.example.meinwald;
+
+import android.os.Bundle;
+
+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 android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+
+import com.example.meinwald.ui.main.SectionsPagerAdapter;
+
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(this, getSupportFragmentManager());
+        ViewPager viewPager = findViewById(R.id.view_pager);
+        viewPager.setAdapter(sectionsPagerAdapter);
+        TabLayout tabs = findViewById(R.id.tabs);
+        tabs.setupWithViewPager(viewPager);
+//        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();
+//            }
+//        });
+    }
+}

Code Android/meinWald/app/src/main/java/com/example/meinwald/ui/main/SectionsPagerAdapter.java → Code Android/Test/meinWald/app/src/main/java/com/example/meinwald/ui/main/SectionsPagerAdapter.java

@@ -19,7 +19,8 @@ public class SectionsPagerAdapter extends FragmentStateAdapter {
 
     @NonNull
     @Override
-    public Fragment createFragment(int position) {
+    public Fragment createFragment(int position)
+    {
         return null;
     }
 

Code Android/meinWald/app/src/main/java/com/example/meinwald/ui/main/map/MapsFragment.java → Code Android/Test/meinWald/app/src/main/java/com/example/meinwald/ui/main/map/MapsFragment.java

@@ -34,5 +34,11 @@ public class MapsFragment extends Fragment implements OnMapReadyCallback {
             public void onMapReady(GoogleMap googleMap) {
                 ;
             }
+        });
+
+        return root;
     }
+
+    @Override
+    public void onMapReady(GoogleMap googleMap) { }
 }

Code Android/Test/meinWald/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>

Code Android/Test/meinWald/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>

Code Android/Test/meinWald/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,44 @@
+<?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">
+
+    <androidx.viewpager.widget.ViewPager
+        android:id="@+id/view_pager"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <TextView
+            android:id="@+id/title"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:gravity="center"
+            android:minHeight="?actionBarSize"
+            android:padding="@dimen/appbar_padding"
+            android:text="@string/app_name"
+            android:textAppearance="@style/TextAppearance.Widget.AppCompat.Toolbar.Title" />
+
+        <com.google.android.material.tabs.TabLayout
+            android:id="@+id/tabs"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:background="?attr/colorPrimary" />
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <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>

Code Android/Test/meinWald/app/src/main/res/layout/fragment_map.xml

@@ -0,0 +1,24 @@
+<?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"
+    app:layout_constraintBottom_toTopOf="@+id/nav_view"
+    app:layout_constraintLeft_toLeftOf="parent"
+    app:layout_constraintRight_toRightOf="parent"
+    app:layout_constraintTop_toTopOf="parent"
+    tools:context=".ui.main.map.MapsFragment">
+
+    <fragment xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:map="http://schemas.android.com/apk/res-auto"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:id="@+id/map"
+        android:name="com.google.android.gms.maps.SupportMapFragment"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

Code Android/Test/meinWald/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>

Code Android/Test/meinWald/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>

Code Android/Test/meinWald/app/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#6200EE</color>
+    <color name="colorPrimaryDark">#3700B3</color>
+    <color name="colorAccent">#03DAC5</color>
+</resources>

Code Android/Test/meinWald/app/src/main/res/values/dimens.xml

@@ -0,0 +1,8 @@
+<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="appbar_padding">16dp</dimen>
+    <dimen name="fab_margin">16dp</dimen>
+    <dimen name="appbar_padding_top">8dp</dimen>
+</resources>

Code Android/Test/meinWald/app/src/main/res/values/strings.xml

@@ -0,0 +1,6 @@
+<resources>
+    <string name="app_name">meinWald</string>
+    <string name="tab_text_1">Tab 1</string>
+    <string name="tab_text_2">Tab 2</string>
+    <string name="google_maps_key">AIzaSyCeqLO-a19avw8emsqNmCRkXx9IHeBbyW4</string>
+</resources>

Code Android/Test/meinWald/app/src/main/res/values/styles.xml

@@ -0,0 +1,19 @@
+<resources>
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+
+</resources>

Code Android/Test/meinWald/app/src/test/java/com/example/meinwald/ExampleUnitTest.java

@@ -0,0 +1,17 @@
+package com.example.meinwald;
+
+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);
+    }
+}

Code Android/Test/meinWald/build.gradle

@@ -0,0 +1,24 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath "com.android.tools.build:gradle:4.0.0"
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

Code Android/Test/meinWald/gradle.properties

@@ -0,0 +1,19 @@
+# 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
+# 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
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=true

Code Android/Test/meinWald/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Mon Aug 31 15:11:39 CEST 2020
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip

Code Android/Test/meinWald/gradlew

@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  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 "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+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, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$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`="\"$arg\""
+        fi
+        i=$((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"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

Code Android/Test/meinWald/gradlew.bat

@@ -0,0 +1,84 @@
+@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 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=
+
+@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 init
+
+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 init
+
+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
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+: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 %CMD_LINE_ARGS%
+
+: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

Code Android/Test/meinWald/settings.gradle

@@ -0,0 +1,2 @@
+include ':app'
+rootProject.name = "meinWald"

Code Android/meinWald/app/build.gradle

@@ -24,20 +24,20 @@ android {
 
 dependencies {
     implementation fileTree(dir: "libs", include: ["*.jar"])
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'com.google.android.material:material:1.0.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    implementation 'androidx.lifecycle:lifecycle-extensions:2.1.0'
-    implementation 'com.google.android.gms:play-services-maps:17.0.0'
-    implementation "androidx.viewpager2:viewpager2:1.0.0"
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.2.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
+    implementation 'androidx.vectordrawable:vectordrawable:1.1.0'
+    implementation 'androidx.navigation:navigation-fragment:2.3.0'
+    implementation 'androidx.navigation:navigation-ui:2.3.0'
+    implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
     implementation 'com.google.firebase:firebase-database:19.3.0'
     implementation 'com.android.volley:volley:1.1.1'
     implementation 'com.google.firebase:firebase-messaging:20.2.0'
     implementation 'com.google.android.gms:play-services-maps:17.0.0'
     implementation 'com.google.android.libraries.places:places:2.2.0'
-
     testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
 
 }

Code Android/meinWald/app/src/main/AndroidManifest.xml

@@ -11,8 +11,7 @@
         android:theme="@style/AppTheme">
         <activity
             android:name=".MainActivity"
-            android:label="@string/app_name"
-            android:theme="@style/AppTheme.NoActionBar">
+            android:label="@string/app_name">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
@@ -26,5 +25,4 @@
     </application>
 
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
-
 </manifest>

Code Android/meinWald/app/src/main/java/com/example/meinwald/MainActivity.java

@@ -2,18 +2,13 @@ package com.example.meinwald;
 
 import android.os.Bundle;
 
-import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import com.google.android.material.snackbar.Snackbar;
-import com.google.android.material.tabs.TabLayout;
+import com.google.android.material.bottomnavigation.BottomNavigationView;
 
-import androidx.viewpager.widget.ViewPager;
 import androidx.appcompat.app.AppCompatActivity;
-
-import android.view.Menu;
-import android.view.MenuItem;
-import android.view.View;
-
-import com.example.meinwald.ui.main.SectionsPagerAdapter;
+import androidx.navigation.NavController;
+import androidx.navigation.Navigation;
+import androidx.navigation.ui.AppBarConfiguration;
+import androidx.navigation.ui.NavigationUI;
 
 public class MainActivity extends AppCompatActivity {
 
@@ -21,19 +16,15 @@ public class MainActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
-        SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(this, getSupportFragmentManager());
-        ViewPager viewPager = findViewById(R.id.view_pager);
-        viewPager.setAdapter(sectionsPagerAdapter);
-        TabLayout tabs = findViewById(R.id.tabs);
-        tabs.setupWithViewPager(viewPager);
-//        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();
-//            }
-//        });
+        BottomNavigationView navView = findViewById(R.id.nav_view);
+        // Passing each menu ID as a set of Ids because each
+        // menu should be considered as top level destinations.
+        AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(
+                R.id.navigation_map, R.id.navigation_areas, R.id.navigation_tasks)
+                .build();
+        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
+        NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
+        NavigationUI.setupWithNavController(navView, navController);
     }
+
 }

Code Android/meinWald/app/src/main/java/com/example/meinwald/ui/area/AreaFragment.java

@@ -0,0 +1,35 @@
+package com.example.meinwald.ui.area;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProviders;
+
+import com.example.meinwald.R;
+
+public class AreaFragment extends Fragment {
+
+    private DashboardViewModel dashboardViewModel;
+
+    public View onCreateView(@NonNull LayoutInflater inflater,
+                             ViewGroup container, Bundle savedInstanceState) {
+        dashboardViewModel =
+                ViewModelProviders.of(this).get(DashboardViewModel.class);
+        View root = inflater.inflate(R.layout.fragment_areas, container, false);
+        final TextView textView = root.findViewById(R.id.text_areas);
+        dashboardViewModel.getText().observe(getViewLifecycleOwner(), new Observer<String>() {
+            @Override
+            public void onChanged(@Nullable String s) {
+                textView.setText(s);
+            }
+        });
+        return root;
+    }
+}

Code Android/meinWald/app/src/main/java/com/example/meinwald/ui/area/DashboardViewModel.java

@@ -0,0 +1,19 @@
+package com.example.meinwald.ui.area;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+public class DashboardViewModel extends ViewModel {
+
+    private MutableLiveData<String> mText;
+
+    public DashboardViewModel() {
+        mText = new MutableLiveData<>();
+        mText.setValue("This is dashboard fragment");
+    }
+
+    public LiveData<String> getText() {
+        return mText;
+    }
+}

Code Android/meinWald/app/src/main/java/com/example/meinwald/ui/map/MapsFragment.java

@@ -0,0 +1,281 @@
+package com.example.meinwald.ui.main.map;
+
+import android.content.pm.PackageManager;
+import android.location.Location;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.example.meinwald.BuildConfig;
+import com.example.meinwald.R;
+import com.google.android.gms.location.FusedLocationProviderClient;
+import com.google.android.gms.location.LocationServices;
+import com.google.android.gms.maps.CameraUpdateFactory;
+import com.google.android.gms.maps.GoogleMap;
+import com.google.android.gms.maps.OnMapReadyCallback;
+import com.google.android.gms.maps.SupportMapFragment;
+import com.google.android.gms.maps.model.CameraPosition;
+import com.google.android.gms.maps.model.LatLng;
+import com.google.android.gms.tasks.OnCompleteListener;
+import com.google.android.gms.tasks.Task;
+
+import androidx.annotation.NonNull;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentTransaction;
+
+import static com.example.meinwald.R.layout.fragment_map;
+
+public class MapsFragment extends Fragment implements OnMapReadyCallback {
+
+    /**
+     * ______________________________________________________________________________________________
+     * MAPS
+     */
+    // A default location and default zoom to use when location permission is not granted.
+    private static final LatLng M_DEFAULT_LOCATION = new LatLng(49.5, 11.0); //Nuremberg
+    private static final int DEFAULT_ZOOM = 1;
+    private static final float MAX_ZOOM = (float) 20.0;
+
+
+    private static final int PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1;
+    private static final String TAG = MapsFragment.class.getSimpleName();
+    // Keys for storing activity state.
+    private static final String KEY_CAMERA_POSITION = "camera_position";
+    private static final String KEY_LOCATION = "location";
+
+    private GoogleMap mMap;
+    private CameraPosition mCameraPosition;
+
+    /**
+     * The entry point to the Fused Location Provider.
+     */
+    private FusedLocationProviderClient mFusedLocationProviderClient;
+    private boolean mLocationPermissionGranted;
+    /**
+     * The geographical location where the device is currently located.
+     * That is the last-known location retrieved by the Fused Location Provider.
+     */
+    private Location mLastKnownLocation;
+
+    /**
+     * Is called when the MapsFragment view is created. Initializes all service connections, the location client and map itself.
+     * @param inflater Calling LayoutInflater
+     * @param container ViewGroup
+     * @param savedInstanceState Applications savedInstanceState
+     * @return
+     */
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+
+        //get view to inflate
+        View root = inflater.inflate(fragment_map, container, false);
+
+        //display map fragment
+        SupportMapFragment mapFragment = new SupportMapFragment();
+        FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
+        transaction.add(R.id.map, mapFragment).commit();
+
+        //construct a FusedLocationProviderClient.
+        mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(getActivity());
+
+        //wait for map is ready
+        mapFragment.getMapAsync(new OnMapReadyCallback() {
+            @Override
+            public void onMapReady(GoogleMap googleMap) {
+                //save map instance locally
+                mMap = googleMap;
+                //set max zoom level
+                mMap.setMaxZoomPreference(MAX_ZOOM);
+
+                //retrieve saved instance state
+                mCameraPosition  = parseCameraPosition(PreferenceManager.getDefaultSharedPreferences(getContext()).getString(KEY_CAMERA_POSITION, new CameraPosition(new LatLng(45.0,11.0), (float) 1.0, (float) 0.0,(float) 0.0).toString()));
+                mLastKnownLocation  = new Location(PreferenceManager.getDefaultSharedPreferences(getContext()).getString(KEY_LOCATION, new LatLng(45.0,11.0).toString()));
+                mCameraPosition  = parseCameraPosition(PreferenceManager.getDefaultSharedPreferences(getContext()).getString(KEY_CAMERA_POSITION, new CameraPosition(new LatLng(45.0,11.0), (float) 1.0, (float) 0.0,(float) 0.0).toString()));
+
+                //move camera to last position
+                mMap.moveCamera(CameraUpdateFactory.newCameraPosition(mCameraPosition));
+
+                //get permission
+                getLocationPermission();
+
+                //turn on the My Location layer and the related control on the map.
+                updateLocationUI();
+
+                // Get the current location of the device and set the position of the map.
+                getDeviceLocation();
+            }
+        });
+
+        return root;
+    }
+
+    @Override
+    public void onPause() {
+
+        //save current location and camera position to shared preferences
+        if (mMap.getCameraPosition() != null && mLastKnownLocation != null) {
+            PreferenceManager.getDefaultSharedPreferences(getContext()).edit().putString(KEY_CAMERA_POSITION, mMap.getCameraPosition().toString()).commit();
+            PreferenceManager.getDefaultSharedPreferences(getContext()).edit().putString(KEY_LOCATION, mLastKnownLocation.toString()).commit();
+        }
+
+        super.onPause();
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+    }
+
+    /**
+     * Parses a string and creates a new CameraPosition from it.
+     * Use CameraPosition.toString() to get corresponding string.
+     * @param posString String which includes a camera position.
+     * @return The parsed position of type CameraPosition.
+     */
+    private CameraPosition parseCameraPosition(String posString) {
+        //parse string from shared preferences (CameraPosition.toString())
+        String[] stringsplit = posString.split(" ");
+        float lat = Float.parseFloat(stringsplit[1].split(",")[0].substring(1));
+        float lng = Float.parseFloat(stringsplit[1].split(",")[1].substring(0,stringsplit[1].split(",")[1].length()-1));
+        float zoom = Float.parseFloat(stringsplit[2].split("=")[1].substring(0,stringsplit[2].split("=")[1].length()-1));
+        float tilt = Float.parseFloat(stringsplit[3].split("=")[1].substring(0,stringsplit[3].split("=")[1].length()-1));
+        float bearing = Float.parseFloat(stringsplit[4].split("=")[1].substring(0,stringsplit[4].split("=")[1].length()-1));
+
+        return new CameraPosition(new LatLng(lat,lng),zoom,tilt,bearing);
+    }
+
+    /**
+     * Request location permission, so that we can get the location of the device.
+     * The result of the permission request is handled by a callback,
+     * onRequestPermissionsResult.
+     *
+     */
+    private void getLocationPermission() {
+        if (ContextCompat.checkSelfPermission(getActivity().getApplicationContext(),
+                android.Manifest.permission.ACCESS_FINE_LOCATION)
+                == PackageManager.PERMISSION_GRANTED) {
+            mLocationPermissionGranted = true;
+        } else {
+            ActivityCompat.requestPermissions(getActivity(),
+                    new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
+                    PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
+        }
+    }
+
+    /**
+     * DOCU ME!
+     * TOOD: What are grant results etc for?
+     * @param requestCode
+     * @param permissions
+     * @param grantResults
+     */
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
+    {
+        mLocationPermissionGranted = false;
+        switch (requestCode) {
+            case PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION: {
+                // If request is cancelled, the result arrays are empty.
+                if (grantResults.length > 0
+                        && grantResults[0] == PackageManager.PERMISSION_GRANTED)
+                {
+                    updateLocationUI();
+                    mLocationPermissionGranted = true;
+                }
+            }
+        }
+    }
+
+    /**
+     * Get the best and most recent location of the device, which may be null in rare
+     * cases when a location is not available.
+     *
+     */
+    private void getDeviceLocation() {
+        try {
+            if (mLocationPermissionGranted) {
+                Task<Location> locationResult = mFusedLocationProviderClient.getLastLocation();
+                locationResult.addOnCompleteListener(getActivity(), new OnCompleteListener<Location>() {
+                    @Override
+                    public void onComplete(@NonNull Task<Location> task) {
+                        if (task.isSuccessful()) {
+                            // Set the last known position to the current location of the device.
+                            mLastKnownLocation = task.getResult();
+                            if (BuildConfig.DEBUG) {
+
+                                if (task.getResult() != null)
+                                {
+                                    Log.d(TAG, "getDeviceLocation " + task.getResult().toString());
+
+                                }
+                            }
+                        } else {
+                            if (BuildConfig.DEBUG) {
+                                Log.d(TAG, "Current location is null. Using defaults.");
+                                Log.e(TAG, "Exception: %s", task.getException());
+                            }
+                            mMap.moveCamera(CameraUpdateFactory
+                                    .newLatLngZoom(M_DEFAULT_LOCATION, DEFAULT_ZOOM));
+                            //mMap.getUiSettings().setMyLocationButtonEnabled(false);
+                            if (BuildConfig.DEBUG) {
+                                Log.d(TAG, "getDeviceLocation: task not successful");
+                            }
+                        }
+                    }
+                });
+            }
+        } catch (SecurityException e)  {
+            if (BuildConfig.DEBUG) {
+                Log.e(TAG, "Exception occurred: ");
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private void updateLocationUI() {
+        if (mMap == null) {
+            if (BuildConfig.DEBUG) {
+                Log.d(TAG, "Permission: Map not ready!");
+            }
+            return;
+        }
+        try {
+            if (mLocationPermissionGranted) {
+                mMap.setMyLocationEnabled(true);
+                mMap.getUiSettings().setMapToolbarEnabled(true);
+                mMap.getUiSettings().setMyLocationButtonEnabled(true);
+                mMap.getUiSettings().setCompassEnabled(true);
+                mMap.getUiSettings().setZoomControlsEnabled(true);
+
+                if (BuildConfig.DEBUG) {
+                    Log.d(TAG, "Permission: Granted!");
+                }
+            } else {
+                mMap.setMyLocationEnabled(false);
+                mMap.getUiSettings().setMyLocationButtonEnabled(false);
+                mMap.getUiSettings().setZoomControlsEnabled(false);
+                mMap.getUiSettings().setCompassEnabled(false);
+                mMap.getUiSettings().setMapToolbarEnabled(false);
+                mLastKnownLocation = null;
+
+                if (BuildConfig.DEBUG) {
+                    Log.d(TAG, "Permission: Denied!");
+                }
+
+                getLocationPermission();
+            }
+        } catch (SecurityException e)  {
+            if (BuildConfig.DEBUG) {
+                Log.e(TAG, "Exception occurred: ");
+                e.printStackTrace();
+            }
+        }
+    }
+
+    @Override
+    public void onMapReady(GoogleMap googleMap) { }
+}

Code Android/meinWald/app/src/main/java/com/example/meinwald/ui/task/NotificationsViewModel.java

@@ -0,0 +1,19 @@
+package com.example.meinwald.ui.task;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+public class NotificationsViewModel extends ViewModel {
+
+    private MutableLiveData<String> mText;
+
+    public NotificationsViewModel() {
+        mText = new MutableLiveData<>();
+        mText.setValue("This is notifications fragment");
+    }
+
+    public LiveData<String> getText() {
+        return mText;
+    }
+}

Code Android/meinWald/app/src/main/java/com/example/meinwald/ui/task/TasksFragment.java

@@ -0,0 +1,47 @@
+package com.example.meinwald.ui.task;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProviders;
+
+import com.example.meinwald.R;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
+
+public class TasksFragment extends Fragment {
+
+    private NotificationsViewModel notificationsViewModel;
+
+    public View onCreateView(@NonNull LayoutInflater inflater,
+                             ViewGroup container, Bundle savedInstanceState) {
+        notificationsViewModel = ViewModelProviders.of(this).get(NotificationsViewModel.class);
+        View root = inflater.inflate(R.layout.fragment_tasks, container, false);
+        final TextView textView = root.findViewById(R.id.text_tasks);
+        notificationsViewModel.getText().observe(getViewLifecycleOwner(), new Observer<String>() {
+            @Override
+            public void onChanged(@Nullable String s) {
+                textView.setText(s);
+            }
+        });
+
+        FloatingActionButton fab = root.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();
+            }
+        });
+
+        return root;
+    }
+}

Code Android/meinWald/app/src/main/res/drawable/ic_dashboard_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M3,13h8L11,3L3,3v10zM3,21h8v-6L3,15v6zM13,21h8L21,11h-8v10zM13,3v6h8L21,3h-8z" />
+</vector>

Code Android/meinWald/app/src/main/res/drawable/ic_home_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M10,20v-6h4v6h5v-8h3L12,3 2,12h3v8z" />
+</vector>

Code Android/meinWald/app/src/main/res/drawable/ic_notifications_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M12,22c1.1,0 2,-0.9 2,-2h-4c0,1.1 0.89,2 2,2zM18,16v-5c0,-3.07 -1.64,-5.64 -4.5,-6.32L13.5,4c0,-0.83 -0.67,-1.5 -1.5,-1.5s-1.5,0.67 -1.5,1.5v0.68C7.63,5.36 6,7.92 6,11v5l-2,2v1h16v-1l-2,-2z" />
+</vector>

Code Android/meinWald/app/src/main/res/layout/activity_main.xml

@@ -1,44 +1,36 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<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/container"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".MainActivity">
+    app:layout_constraintBottom_toTopOf="@+id/nav_view"
+    app:layout_constraintLeft_toLeftOf="parent"
+    app:layout_constraintRight_toRightOf="parent"
+    app:layout_constraintTop_toTopOf="parent">
 
-    <androidx.viewpager.widget.ViewPager
-        android:id="@+id/view_pager"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
-
-    <com.google.android.material.appbar.AppBarLayout
-        android:layout_width="match_parent"
+    <com.google.android.material.bottomnavigation.BottomNavigationView
+        android:id="@+id/nav_view"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
-        android:theme="@style/AppTheme.AppBarOverlay">
+        android:layout_marginStart="0dp"
+        android:layout_marginEnd="0dp"
+        android:background="?android:attr/windowBackground"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:menu="@menu/bottom_nav_menu" />
 
-        <TextView
-            android:id="@+id/title"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:gravity="center"
-            android:minHeight="?actionBarSize"
-            android:padding="@dimen/appbar_padding"
-            android:text="@string/app_name"
-            android:textAppearance="@style/TextAppearance.Widget.AppCompat.Toolbar.Title" />
-
-        <com.google.android.material.tabs.TabLayout
-            android:id="@+id/tabs"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:background="?attr/colorPrimary" />
-    </com.google.android.material.appbar.AppBarLayout>
+    <fragment
+        android:id="@+id/nav_host_fragment"
+        android:name="androidx.navigation.fragment.NavHostFragment"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        app:defaultNavHost="true"
+        app:layout_constraintBottom_toTopOf="@+id/nav_view"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:navGraph="@navigation/mobile_navigation" />
 
-    <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>
+</androidx.constraintlayout.widget.ConstraintLayout>

Code Android/meinWald/app/src/main/res/layout/fragment_areas.xml

@@ -0,0 +1,33 @@
+<?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=".ui.area.AreaFragment">
+
+    <TextView
+        android:id="@+id/text_areas"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="8dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="8dp"
+        android:textAlignment="center"
+        android:textSize="20sp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        android:gravity="center_horizontal" />
+
+    <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:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:srcCompat="@android:drawable/ic_dialog_email" />
+</androidx.constraintlayout.widget.ConstraintLayout>

Code Android/meinWald/app/src/main/res/layout/fragment_map.xml

@@ -8,7 +8,7 @@
     app:layout_constraintLeft_toLeftOf="parent"
     app:layout_constraintRight_toRightOf="parent"
     app:layout_constraintTop_toTopOf="parent"
-    tools:context=".ui.main.map.MapsFragment">
+    tools:context=".ui.home.MapsFragment">
 
     <fragment xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:map="http://schemas.android.com/apk/res-auto"
@@ -17,6 +17,7 @@
         android:name="com.google.android.gms.maps.SupportMapFragment"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        app:layout_constraintBottom_toTopOf="@+id/nav_view"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent"/>

Code Android/meinWald/app/src/main/res/layout/fragment_tasks.xml

@@ -0,0 +1,33 @@
+<?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=".ui.task.TasksFragment">
+
+    <TextView
+        android:id="@+id/text_tasks"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="8dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="8dp"
+        android:textAlignment="center"
+        android:layout_gravity="center_horizontal"
+        android:textSize="20sp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <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:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:srcCompat="@android:drawable/ic_dialog_email" />
+</androidx.constraintlayout.widget.ConstraintLayout>

Code Android/meinWald/app/src/main/res/menu/bottom_nav_menu.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@+id/navigation_map"
+        android:icon="@drawable/ic_home_black_24dp"
+        android:title="@string/title_map" />
+
+    <item
+        android:id="@+id/navigation_areas"
+        android:icon="@drawable/ic_dashboard_black_24dp"
+        android:title="@string/title_areas" />
+
+    <item
+        android:id="@+id/navigation_tasks"
+        android:icon="@drawable/ic_notifications_black_24dp"
+        android:title="@string/title_tasks" />
+
+</menu>

Code Android/meinWald/app/src/main/res/navigation/mobile_navigation.xml

@@ -0,0 +1,25 @@
+<?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/mobile_navigation"
+    app:startDestination="@+id/navigation_map">
+
+    <fragment
+        android:id="@+id/navigation_map"
+        android:name="com.example.meinwald.ui.main.map.MapsFragment"
+        android:label="@string/title_map"
+        tools:layout="@layout/fragment_map" />
+
+    <fragment
+        android:id="@+id/navigation_areas"
+        android:name="com.example.meinwald.ui.area.AreaFragment"
+        android:label="@string/title_areas"
+        tools:layout="@layout/fragment_areas" />
+
+    <fragment
+        android:id="@+id/navigation_tasks"
+        android:name="com.example.meinwald.ui.task.TasksFragment"
+        android:label="@string/title_tasks"
+        tools:layout="@layout/fragment_tasks" />
+</navigation>

Code Android/meinWald/app/src/main/res/values/dimens.xml

@@ -2,7 +2,5 @@
     <!-- Default screen margins, per the Android Design guidelines. -->
     <dimen name="activity_horizontal_margin">16dp</dimen>
     <dimen name="activity_vertical_margin">16dp</dimen>
-    <dimen name="appbar_padding">16dp</dimen>
     <dimen name="fab_margin">16dp</dimen>
-    <dimen name="appbar_padding_top">8dp</dimen>
 </resources>

Code Android/meinWald/app/src/main/res/values/strings.xml

@@ -1,6 +1,7 @@
 <resources>
     <string name="app_name">meinWald</string>
-    <string name="tab_text_1">Tab 1</string>
-    <string name="tab_text_2">Tab 2</string>
+    <string name="title_map">Karte</string>
+    <string name="title_areas">Grundstücke</string>
+    <string name="title_tasks">Aufgaben</string>
     <string name="google_maps_key">AIzaSyCeqLO-a19avw8emsqNmCRkXx9IHeBbyW4</string>
 </resources>

Code Android/meinWald/app/src/main/res/values/styles.xml

@@ -7,13 +7,4 @@
         <item name="colorAccent">@color/colorAccent</item>
     </style>
 
-    <style name="AppTheme.NoActionBar">
-        <item name="windowActionBar">false</item>
-        <item name="windowNoTitle">true</item>
-    </style>
-
-    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
-
-    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
-
 </resources>

Code Android/meinWald/gradle/wrapper/gradle-wrapper.properties

@@ -1,4 +1,4 @@
-#Mon Aug 31 15:11:39 CEST 2020
+#Mon Aug 31 20:51:06 CEST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME