message body

fcm/.idea/vcs.xml

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

fcm/app/src/main/AndroidManifest.xml

         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.App">
-
-
         <service android:name=".MyFirebaseMessagingService"
             android:exported="false">
             <intent-filter>
             </intent-filter>
         </activity>
     </application>
-
 </manifest>

fcm/app/src/main/java/com/example/fcm/MainActivity.java

         buttonSend.setOnClickListener(v -> {
         TOPIC = "/topics/testForMDT"; //topic must match with what the receiver subscribed to
         NOTIFICATION_TITLE = "Test";
-        NOTIFICATION_MESSAGE = "Hello World";
+        NOTIFICATION_MESSAGE = "Gregor";
 
         JSONObject notification = new JSONObject();
         JSONObject notifcationBody = new JSONObject();

fcm/app/src/main/res/values-night/styles.xml

         <item name="colorPrimaryDark">@color/purple700</item>
         <item name="colorAccent">@color/teal200</item>
     </style>
-
 </resources>