first commit

2020-05-24 17:41:44 +02:00 · 2020-05-24 17:41:44 +02:00 · 921ea4db20
commit 921ea4db20
49 changed files with 1550 additions and 0 deletions
--- a/fcm/.gitignore
+++ b/fcm/.gitignore
@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
--- a/fcm/.idea/codeStyles/Project.xml
+++ b/fcm/.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>^$</XML_NAMESPACE>
+                </AND>
+              </match>
+              <order>BY_NAME</order>
+            </rule>
+          </section>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>.*</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
+                </AND>
+              </match>
+              <order>ANDROID_ATTRIBUTE_ORDER</order>
+            </rule>
+          </section>
+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>.*</NAME>
+                  <XML_ATTRIBUTE />
+                  <XML_NAMESPACE>.*</XML_NAMESPACE>
+                </AND>
+              </match>
+              <order>BY_NAME</order>
+            </rule>
+          </section>
+        </rules>
+      </arrangement>
+    </codeStyleSettings>
+  </code_scheme>
+</component>
--- a/fcm/.idea/compiler.xml
+++ b/fcm/.idea/compiler.xml
@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel>
+      <module name="fcm.app" target="1.8" />
+    </bytecodeTargetLevel>
+  </component>
+</project>
--- a/fcm/.idea/gradle.xml
+++ b/fcm/.idea/gradle.xml
@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="testRunner" value="PLATFORM" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="JDK" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveModulePerSourceSet" value="false" />
+        <option name="useQualifiedModuleNames" value="true" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>
--- a/fcm/.idea/jarRepositories.xml
+++ b/fcm/.idea/jarRepositories.xml
@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="BintrayJCenter" />
+      <option name="name" value="BintrayJCenter" />
+      <option name="url" value="https://jcenter.bintray.com/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="Google" />
+      <option name="name" value="Google" />
+      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
+    </remote-repository>
+  </component>
+</project>
--- a/fcm/.idea/misc.xml
+++ b/fcm/.idea/misc.xml
@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="JDK" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>
--- a/fcm/.idea/modules/app/google-services.json
+++ b/fcm/.idea/modules/app/google-services.json
@ -0,0 +1,48 @@
+{
+  "project_info": {
+    "project_number": "977351283460",
+    "firebase_url": "https://fcmfirebaseproject-ececa.firebaseio.com",
+    "project_id": "fcmfirebaseproject-ececa",
+    "storage_bucket": "fcmfirebaseproject-ececa.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:977351283460:android:d8f7f379514a50463bf651",
+        "android_client_info": {
+          "package_name": "com.example.fcm"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "977351283460-2sd6lffgb0k9gqp6nl2hc7j89rctiqqq.apps.googleusercontent.com",
+          "client_type": 1,
+          "android_info": {
+            "package_name": "com.example.fcm",
+            "certificate_hash": "d633de2a71e90c6d587da6f5396a401f3e2eaded"
+          }
+        },
+        {
+          "client_id": "977351283460-31tkkuo092p3sl254kcsqinm7m6fvjei.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyB8-Lpyz6D1TNMZlMU9HrbvNWOvaAHY2gc"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": [
+            {
+              "client_id": "977351283460-31tkkuo092p3sl254kcsqinm7m6fvjei.apps.googleusercontent.com",
+              "client_type": 3
+            }
+          ]
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}
--- a/fcm/.idea/runConfigurations.xml
+++ b/fcm/.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>
--- a/fcm/app/.gitignore
+++ b/fcm/app/.gitignore
@ -0,0 +1 @@
+/build
--- a/fcm/app/build.gradle
+++ b/fcm/app/build.gradle
@ -0,0 +1,51 @@
+plugins {
+    id 'com.android.application'
+    id 'com.google.gms.google-services'
+}
+
+android {
+    compileSdkVersion 29
+    buildToolsVersion "29.0.3"
+
+    defaultConfig {
+        applicationId "com.example.fcm"
+        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'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    viewBinding {
+        enabled = true
+    }
+}
+
+dependencies {
+
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'com.google.android.material:material:1.1.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'com.google.firebase:firebase-messaging:20.2.0'
+    implementation 'android.arch.work:work-runtime:2.0.1-rc01'
+    implementation 'com.google.firebase:firebase-database:19.3.0'
+    implementation 'com.firebase:firebase-client-android:2.5.0'
+    implementation 'com.android.volley:volley:1.1.0'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+}
+
+apply plugin: 'com.google.gms.google-services'
--- a/fcm/app/google-services.json
+++ b/fcm/app/google-services.json
@ -0,0 +1,48 @@
+{
+  "project_info": {
+    "project_number": "977351283460",
+    "firebase_url": "https://fcmfirebaseproject-ececa.firebaseio.com",
+    "project_id": "fcmfirebaseproject-ececa",
+    "storage_bucket": "fcmfirebaseproject-ececa.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:977351283460:android:d8f7f379514a50463bf651",
+        "android_client_info": {
+          "package_name": "com.example.fcm"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "977351283460-2sd6lffgb0k9gqp6nl2hc7j89rctiqqq.apps.googleusercontent.com",
+          "client_type": 1,
+          "android_info": {
+            "package_name": "com.example.fcm",
+            "certificate_hash": "d633de2a71e90c6d587da6f5396a401f3e2eaded"
+          }
+        },
+        {
+          "client_id": "977351283460-31tkkuo092p3sl254kcsqinm7m6fvjei.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyB8-Lpyz6D1TNMZlMU9HrbvNWOvaAHY2gc"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": [
+            {
+              "client_id": "977351283460-31tkkuo092p3sl254kcsqinm7m6fvjei.apps.googleusercontent.com",
+              "client_type": 3
+            }
+          ]
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}
--- a/fcm/app/proguard-rules.pro
+++ b/fcm/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
--- a/fcm/app/src/androidTest/java/com/example/fcm/ExampleInstrumentedTest.java
+++ b/fcm/app/src/androidTest/java/com/example/fcm/ExampleInstrumentedTest.java
@ -0,0 +1,26 @@
+package com.example.fcm;
+
+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.fcm", appContext.getPackageName());
+    }
+}
--- a/fcm/app/src/main.zip
+++ b/fcm/app/src/main.zip
--- a/fcm/app/src/main/AndroidManifest.xml
+++ b/fcm/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.fcm">
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
+    <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.App">
+
+
+        <service android:name=".MyFirebaseMessagingService"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="com.google.firebase.MESSAGING_EVENT" />
+            </intent-filter>
+        </service>
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
--- a/fcm/app/src/main/java/com/example/fcm/MainActivity.java
+++ b/fcm/app/src/main/java/com/example/fcm/MainActivity.java
@ -0,0 +1,149 @@
+package com.example.fcm;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.annotation.SuppressLint;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.os.Build;
+import android.os.Bundle;
+import android.util.Log;
+import android.widget.Button;
+import android.widget.Toast;
+import com.android.volley.toolbox.JsonObjectRequest;
+import com.example.fcm.databinding.ActivityMainBinding;
+import com.google.firebase.iid.FirebaseInstanceId;
+import com.google.firebase.messaging.FirebaseMessaging;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+
+
+public class MainActivity extends AppCompatActivity {
+
+    final private String FCM_API = "https://fcm.googleapis.com/fcm/send";
+    final private String serverKey = "key=" + "AAAA446tEwQ:APA91bEAqpEFQ0ufbp9WSFIGV68P8kUgNlnKzuEHIcWLeS1YlMwJewRdnAGRae0VpDzriag7ZQbMUMPDiT-LD1kTXLQFM73C9DC13iN4nn9gEYCPVp4MN8JHFm20m1BxS8zWZcKDYFcz";
+    final private String contentType = "application/json";
+    private static final String TAG = "MainActivity";
+
+    String NOTIFICATION_TITLE;
+    String NOTIFICATION_MESSAGE;
+    String TOPIC;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        ActivityMainBinding binding = ActivityMainBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+
+        Button buttonSend = findViewById(R.id.sendButton);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            // Create channel to show notifications.
+            String channelId  = getString(R.string.default_notification_channel_id);
+            String channelName = getString(R.string.default_notification_channel_name);
+            NotificationManager notificationManager =
+                    getSystemService(NotificationManager.class);
+            notificationManager.createNotificationChannel(new NotificationChannel(channelId,
+                    channelName, NotificationManager.IMPORTANCE_LOW));
+        }
+
+        // If a notification message is tapped, any data accompanying the notification
+        // message is available in the intent extras. In this sample the launcher
+        // intent is fired when the notification is tapped, so any accompanying data would
+        // be handled here. If you want a different intent fired, set the click_action
+        // field of the notification message to the desired intent. The launcher intent
+        // is used when no click_action is specified.
+        //
+        // Handle possible data accompanying notification message.
+        // [START handle_data_extras]
+        if (getIntent().getExtras() != null) {
+            for (String key : getIntent().getExtras().keySet()) {
+                Object value = getIntent().getExtras().get(key);
+                Log.d(TAG, "Key: " + key + " Value: " + value);
+            }
+        }
+        // [END handle_data_extras]
+
+        binding.subscribeButton.setOnClickListener(v -> {
+            Log.d(TAG, "Subscribing to topic");
+            // [START subscribe_topics]
+            FirebaseMessaging.getInstance().subscribeToTopic("testForMDT")
+                    .addOnCompleteListener(task -> {
+                        String msg = getString(R.string.msg_subscribed);
+                        if (!task.isSuccessful()) {
+                            msg = getString(R.string.msg_subscribe_failed);
+                        }
+                        Log.d(TAG, msg);
+                        Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
+                    });
+            // [END subscribe_topics]
+        });
+
+        binding.logTokenButton.setOnClickListener(v -> {
+            // Get token
+            // [START retrieve_current_token]
+            FirebaseInstanceId.getInstance().getInstanceId()
+                    .addOnCompleteListener(task -> {
+                        if (!task.isSuccessful()) {
+                            Log.w(TAG, "getInstanceId failed", task.getException());
+                            return;
+                        }
+
+                        // Get new Instance ID token
+                        String token = Objects.requireNonNull(task.getResult()).getToken();
+
+                        // Log and toast
+                        @SuppressLint({"StringFormatInvalid", "LocalSuppress"}) String msg = getString(R.string.msg_token_fmt, token);
+                        Log.d(TAG, msg);
+                        Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
+                    });
+            // [END retrieve_current_token]
+        });
+
+        buttonSend.setOnClickListener(v -> {
+        TOPIC = "/topics/testForMDT"; //topic must match with what the receiver subscribed to
+        NOTIFICATION_TITLE = "Test";
+        NOTIFICATION_MESSAGE = "Hello World";
+
+        JSONObject notification = new JSONObject();
+        JSONObject notifcationBody = new JSONObject();
+        try {
+            notifcationBody.put("title", NOTIFICATION_TITLE);
+            notifcationBody.put("message", NOTIFICATION_MESSAGE);
+
+            notification.put("to", TOPIC);
+            notification.put("data", notifcationBody);
+        } catch (JSONException e) {
+            Log.e(TAG, "onCreate: " + e.getMessage() );
+        }
+        sendNotification(notification);
+        });
+    }
+
+    private void sendNotification(JSONObject notification) {
+        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(FCM_API, notification,
+                response -> {
+                    Log.i(TAG, "onResponse: " + response.toString());
+                    //edtTitle.setText("");
+                    //edtMessage.setText("");
+                },
+                error -> {
+                    Toast.makeText(MainActivity.this, "Request error", Toast.LENGTH_LONG).show();
+                    Log.i(TAG, "onErrorResponse: Didn't work");
+                }){
+            @Override
+            public Map<String, String> getHeaders() {
+                Map<String, String> params = new HashMap<>();
+                params.put("Authorization", serverKey);
+                params.put("Content-Type", contentType);
+                return params;
+            }
+        };
+        MySingleton.getInstance(getApplicationContext()).addToRequestQueue(jsonObjectRequest);
+    }
+}
--- a/fcm/app/src/main/java/com/example/fcm/MyFirebaseMessagingService.java
+++ b/fcm/app/src/main/java/com/example/fcm/MyFirebaseMessagingService.java
@ -0,0 +1,219 @@
+package com.example.fcm;
+
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Color;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Build;
+import android.util.Log;
+
+import androidx.annotation.RequiresApi;
+import androidx.core.app.NotificationCompat;
+import androidx.work.OneTimeWorkRequest;
+import androidx.work.WorkManager;
+
+import com.google.firebase.messaging.FirebaseMessagingService;
+import com.google.firebase.messaging.RemoteMessage;
+
+import java.util.Random;
+
+public class MyFirebaseMessagingService extends FirebaseMessagingService {
+    private final String ADMIN_CHANNEL_ID ="admin_channel";
+    private static final String TAG = "MyFirebaseMsgService";
+    private static final String FIREBASE_URL = "https://fcmfirebaseproject-ececa.firebaseio.com";
+
+    /**
+     * Called when message is received.
+     *
+     * @param remoteMessage Object representing the message received from Firebase Cloud Messaging.
+     */
+    // [START receive_message]
+    @Override
+    public void onMessageReceived(RemoteMessage remoteMessage) {
+        // [START_EXCLUDE]
+        // There are two types of messages data messages and notification messages. Data messages
+        // are handled
+        // here in onMessageReceived whether the app is in the foreground or background. Data
+        // messages are the type
+        // traditionally used with GCM. Notification messages are only received here in
+        // onMessageReceived when the app
+        // is in the foreground. When the app is in the background an automatically generated
+        // notification is displayed.
+        // When the user taps on the notification they are returned to the app. Messages
+        // containing both notification
+        // and data payloads are treated as notification messages. The Firebase console always
+        // sends notification
+        // messages. For more see: https://firebase.google.com/docs/cloud-messaging/concept-options
+        // [END_EXCLUDE]
+
+        // TODO(developer): Handle FCM messages here.
+        // Not getting messages here? See why this may be: https://goo.gl/39bRNJ
+        final Intent intent = new Intent(this, MainActivity.class);
+        NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
+        int notificationID = new Random().nextInt(3000);
+
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+            setupChannels(notificationManager);
+        }
+
+        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+        PendingIntent pendingIntent = PendingIntent.getActivity(this , 0, intent,
+                PendingIntent.FLAG_ONE_SHOT);
+
+
+        Uri notificationSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
+        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, ADMIN_CHANNEL_ID)
+                .setSmallIcon(R.drawable.ic_stat_ic_notification)
+                .setContentTitle(remoteMessage.getData().get("title"))
+                .setContentText(remoteMessage.getData().get("message"))
+                .setAutoCancel(true)
+                .setSound(notificationSoundUri)
+                .setContentIntent(pendingIntent);
+
+        notificationManager.notify(notificationID, notificationBuilder.build());
+
+        Log.d(TAG, "From: " + remoteMessage.getFrom());
+
+        // Check if message contains a data payload.
+        if (remoteMessage.getData().size() > 0) {
+            Log.d(TAG, "Message data payload: " + remoteMessage.getData());
+
+            if (/* Check if data needs to be processed by long running job */ true) {
+                // For long-running tasks (10 seconds or more) use WorkManager.
+                scheduleJob();
+            } else {
+                // Handle message within 10 seconds
+                handleNow();
+            }
+
+        }
+
+        // Check if message contains a notification payload.
+        if (remoteMessage.getNotification() != null) {
+            Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
+        }
+
+        // Also if you intend on generating your own notifications as a result of a received FCM
+        // message, here is where that should be initiated. See sendNotification method below.
+    }
+    // [END receive_message]
+
+
+    // [START on_new_token]
+
+    /**
+     * Called if InstanceID token is updated. This may occur if the security of
+     * the previous token had been compromised. Note that this is called when the InstanceID token
+     * is initially generated so this is where you would retrieve the token.
+     */
+    @Override
+    public void onNewToken(String token) {
+        Log.d(TAG, "Refreshed token: " + token);
+
+        // If you want to send messages to this application instance or
+        // manage this apps subscriptions on the server side, send the
+        // Instance ID token to your app server.
+        sendRegistrationToServer(token);
+    }
+    // [END on_new_token]
+
+    /**
+     * Schedule async work using WorkManager.
+     */
+    private void scheduleJob() {
+        // [START dispatch_job]
+        OneTimeWorkRequest work = new OneTimeWorkRequest.Builder(MyWorker.class)
+                .build();
+        WorkManager.getInstance().beginWith(work).enqueue();
+        // [END dispatch_job]
+    }
+
+    /**
+     * Handle time allotted to BroadcastReceivers.
+     */
+    private void handleNow() {
+        Log.d(TAG, "Short lived task is done.");
+    }
+
+    /**
+     * Persist token to third-party servers.
+     *
+     * Modify this method to associate the user's FCM InstanceID token with any server-side account
+     * maintained by your application.
+     *
+     * @param token The new token.
+     */
+    private void sendRegistrationToServer(String token) {
+        // TODO: Implement this method to send token to your app server.
+    }
+
+    /**
+     * Create and show a simple notification containing the received FCM message.
+     *
+     * @param messageBody FCM message body received.
+     */
+    private void sendNotification(String messageBody) {
+        Intent intent = new Intent(this, MainActivity.class);
+        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
+                PendingIntent.FLAG_ONE_SHOT);
+
+        String channelId = getString(R.string.default_notification_channel_id);
+        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
+        NotificationCompat.Builder notificationBuilder =
+                new NotificationCompat.Builder(this, channelId)
+                        .setSmallIcon(R.drawable.ic_stat_ic_notification)
+                        .setContentTitle(getString(R.string.fcm_message))
+                        .setContentText(messageBody)
+                        .setAutoCancel(true)
+                        .setSound(defaultSoundUri)
+                        .setContentIntent(pendingIntent);
+
+        NotificationManager notificationManager =
+                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+
+        // Since android Oreo notification channel is needed.
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            NotificationChannel channel = new NotificationChannel(channelId,
+                    "Channel human readable title",
+                    NotificationManager.IMPORTANCE_DEFAULT);
+            notificationManager.createNotificationChannel(channel);
+        }
+
+        notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
+    }
+
+    //public static void sendNotificationToUser(String user, final String message) {
+    //   Firebase ref = new Firebase(FIREBASE_URL);
+    //    final Firebase notifications = ref.child("notificationRequests");
+
+    //Map notification = new HashMap<>();
+    //    notification.put("username", user);
+    //    notification.put("message", message);
+
+    //   notifications.push().setValue(notification);
+    //}
+
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    private void setupChannels(NotificationManager notificationManager){
+        CharSequence adminChannelName = "New notification";
+        String adminChannelDescription = "Device to devie notification";
+
+        NotificationChannel adminChannel;
+        adminChannel = new NotificationChannel(ADMIN_CHANNEL_ID, adminChannelName, NotificationManager.IMPORTANCE_HIGH);
+        adminChannel.setDescription(adminChannelDescription);
+        adminChannel.enableLights(true);
+        adminChannel.setLightColor(Color.RED);
+        adminChannel.enableVibration(true);
+        if (notificationManager != null) {
+            notificationManager.createNotificationChannel(adminChannel);
+        }
+    }
+
+
+
+}
--- a/fcm/app/src/main/java/com/example/fcm/MySingleton.java
+++ b/fcm/app/src/main/java/com/example/fcm/MySingleton.java
@ -0,0 +1,41 @@
+package com.example.fcm;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+
+import com.android.volley.Request;
+import com.android.volley.RequestQueue;
+import com.android.volley.toolbox.Volley;
+
+public class MySingleton {
+    @SuppressLint("StaticFieldLeak")
+    private static MySingleton instance;
+    private RequestQueue requestQueue;
+    private Context ctx;
+
+    private MySingleton(Context context) {
+        ctx = context;
+        requestQueue = getRequestQueue();
+    }
+
+    public static synchronized MySingleton getInstance(Context context) {
+        if (instance == null) {
+            instance = new MySingleton(context);
+        }
+        return instance;
+    }
+
+    public RequestQueue getRequestQueue() {
+        if (requestQueue == null) {
+            // getApplicationContext() is key, it keeps you from leaking the
+            // Activity or BroadcastReceiver if someone passes one in.
+            requestQueue = Volley.newRequestQueue(ctx.getApplicationContext());
+        }
+        return requestQueue;
+    }
+
+    public <T> void addToRequestQueue(Request<T> req) {
+        getRequestQueue().add(req);
+    }
+
+}
--- a/fcm/app/src/main/java/com/example/fcm/MyWorker.java
+++ b/fcm/app/src/main/java/com/example/fcm/MyWorker.java
@ -0,0 +1,26 @@
+package com.example.fcm;
+
+import android.content.Context;
+import androidx.annotation.NonNull;
+import android.util.Log;
+
+import androidx.work.Worker;
+import androidx.work.WorkerParameters;
+
+
+public class MyWorker extends Worker {
+    private static final String TAG = "MyWorker";
+
+    public MyWorker(@NonNull Context appContext, @NonNull WorkerParameters workerParams) {
+        super(appContext, workerParams);
+    }
+
+    @NonNull
+    @Override
+    public Result doWork() {
+        Log.d(TAG, "Performing long running task in scheduled job");
+        // TODO(developer): add long running task here.
+        return Result.success();
+    }
+
+}
--- a/fcm/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
+++ b/fcm/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>
--- a/fcm/app/src/main/res/drawable/ic_launcher_background.xml
+++ b/fcm/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>
--- a/fcm/app/src/main/res/drawable/ic_stat_ic_notification.png
+++ b/fcm/app/src/main/res/drawable/ic_stat_ic_notification.png
--- a/fcm/app/src/main/res/layout/activity_main.xml
+++ b/fcm/app/src/main/res/layout/activity_main.xml
@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context=".MainActivity">
+
+    <TextView
+        android:id="@+id/informationTextView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal"
+        android:gravity="center_horizontal"
+        android:text="@string/quickstart_message" />
+
+    <Button
+        android:id="@+id/subscribeButton"
+        android:layout_width="@dimen/standard_field_width"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal"
+        android:layout_marginTop="20dp"
+        android:text="@string/subscribe" />
+
+    <Button
+        android:id="@+id/logTokenButton"
+        android:layout_width="@dimen/standard_field_width"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal"
+        android:text="@string/log_token" />
+
+    <Button
+        android:id="@+id/sendButton"
+        android:layout_width="@dimen/standard_field_width"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal"
+        android:text="Send message" />
+
+
+</LinearLayout>
--- a/fcm/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
+++ b/fcm/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>
--- a/fcm/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
+++ b/fcm/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>
--- a/fcm/app/src/main/res/mipmap-hdpi/ic_launcher.png
+++ b/fcm/app/src/main/res/mipmap-hdpi/ic_launcher.png
--- a/fcm/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
+++ b/fcm/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
--- a/fcm/app/src/main/res/mipmap-mdpi/ic_launcher.png
+++ b/fcm/app/src/main/res/mipmap-mdpi/ic_launcher.png
--- a/fcm/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
+++ b/fcm/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
--- a/fcm/app/src/main/res/mipmap-xhdpi/ic_launcher.png
+++ b/fcm/app/src/main/res/mipmap-xhdpi/ic_launcher.png
--- a/fcm/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
+++ b/fcm/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
--- a/fcm/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
+++ b/fcm/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
--- a/fcm/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
+++ b/fcm/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
--- a/fcm/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
+++ b/fcm/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
--- a/fcm/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
+++ b/fcm/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
--- a/fcm/app/src/main/res/values-night/styles.xml
+++ b/fcm/app/src/main/res/values-night/styles.xml
@ -0,0 +1,10 @@
+<resources>
+    <!-- Application theme for dark theme. -->
+    <style name="Theme.App" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/purple200</item>
+        <item name="colorPrimaryDark">@color/purple700</item>
+        <item name="colorAccent">@color/teal200</item>
+    </style>
+
+</resources>
--- a/fcm/app/src/main/res/values/colors.xml
+++ b/fcm/app/src/main/res/values/colors.xml
@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple200">#BB86FC</color>
+    <color name="purple500">#6200EE</color>
+    <color name="purple700">#3700B3</color>
+    <color name="teal200">#03DAC5</color>
+</resources>
--- a/fcm/app/src/main/res/values/dimens.xml
+++ b/fcm/app/src/main/res/values/dimens.xml
@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-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="standard_field_width">200dp</dimen>
+</resources>
--- a/fcm/app/src/main/res/values/strings.xml
+++ b/fcm/app/src/main/res/values/strings.xml
@ -0,0 +1,20 @@
+<resources>
+    <string name="app_name">fcm</string>
+    <string name="quickstart_message">Quickstart message</string>
+    <string name="log_token">Log token</string>
+    <string name="subscribe_to_weather">Subscribe</string>
+    <string name="msg_subscribed">Subscribed to testForMDT topic</string>
+    <string name="msg_token_fmt" translatable="false">InstanceID Token: %s</string>
+
+    <string name="default_notification_channel_id" translatable="false">fcm_default_channel</string>
+    <!--
+        This is the name that users will see when interacting with this channel.
+        It should describe the category of notifications that will be sent through this channel
+     -->
+    <!-- [START fcm_default_icon_string] -->
+    <string name="default_notification_channel_name" translatable="true">testForMDT</string>
+    <!-- [END fcm_default_icon_string] -->
+    <string name="msg_subscribe_failed">Failed to subscribe to testForMDT topic</string>
+    <string name="fcm_message">FCM Message</string>
+    <string name="subscribe">Subscribe</string>
+</resources>
--- a/fcm/app/src/main/res/values/styles.xml
+++ b/fcm/app/src/main/res/values/styles.xml
@ -0,0 +1,10 @@
+<resources>
+    <!-- Base application theme. -->
+    <style name="Theme.App" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/purple500</item>
+        <item name="colorPrimaryDark">@color/purple700</item>
+        <item name="colorAccent">@color/teal200</item>
+    </style>
+
+</resources>
--- a/fcm/app/src/test/java/com/example/fcm/ExampleUnitTest.java
+++ b/fcm/app/src/test/java/com/example/fcm/ExampleUnitTest.java
@ -0,0 +1,17 @@
+package com.example.fcm;
+
+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);
+    }
+}
--- a/fcm/build.gradle
+++ b/fcm/build.gradle
@ -0,0 +1,25 @@
+// 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:4.1.0-alpha05"
+        classpath 'com.google.gms:google-services:4.3.3'
+
+        // 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
+}
--- a/fcm/google-services.json
+++ b/fcm/google-services.json
@ -0,0 +1,48 @@
+{
+  "project_info": {
+    "project_number": "977351283460",
+    "firebase_url": "https://fcmfirebaseproject-ececa.firebaseio.com",
+    "project_id": "fcmfirebaseproject-ececa",
+    "storage_bucket": "fcmfirebaseproject-ececa.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:977351283460:android:d8f7f379514a50463bf651",
+        "android_client_info": {
+          "package_name": "com.example.fcm"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "977351283460-2sd6lffgb0k9gqp6nl2hc7j89rctiqqq.apps.googleusercontent.com",
+          "client_type": 1,
+          "android_info": {
+            "package_name": "com.example.fcm",
+            "certificate_hash": "d633de2a71e90c6d587da6f5396a401f3e2eaded"
+          }
+        },
+        {
+          "client_id": "977351283460-31tkkuo092p3sl254kcsqinm7m6fvjei.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyB8-Lpyz6D1TNMZlMU9HrbvNWOvaAHY2gc"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": [
+            {
+              "client_id": "977351283460-31tkkuo092p3sl254kcsqinm7m6fvjei.apps.googleusercontent.com",
+              "client_type": 3
+            }
+          ]
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}
--- a/fcm/gradle.properties
+++ b/fcm/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
--- a/fcm/gradle/wrapper/gradle-wrapper.jar
+++ b/fcm/gradle/wrapper/gradle-wrapper.jar
--- a/fcm/gradle/wrapper/gradle-wrapper.properties
+++ b/fcm/gradle/wrapper/gradle-wrapper.properties
@ -0,0 +1,6 @@
+#Sat May 23 12:50:08 CEST 2020
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
--- a/fcm/gradlew
+++ b/fcm/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" "$@"
--- a/fcm/gradlew.bat
+++ b/fcm/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
--- a/fcm/settings.gradle
+++ b/fcm/settings.gradle
@ -0,0 +1,2 @@
+include ':app'
+rootProject.name = "fcm"