How to detect a new Android notification?

This example demonstrate about How to detect a new Android notification

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to src/MyListener.java

public interface MyListener {    void setValue (String packageName) ; }

Step 3 − Add the following code to src/MyListener.java

package app.tutorialspoint.com.notifyme ; import android.content.Context ; import android.service.notification.NotificationListenerService ; import android.service.notification.StatusBarNotification ; import android.util.Log ; public class NotificationService extends NotificationListenerService {    private String TAG = this .getClass().getSimpleName() ;    Context context ;    static MyListener myListener ;    @Override    public void onCreate () {       super .onCreate() ;       context = getApplicationContext() ;    }    @Override    public void onNotificationPosted (StatusBarNotification sbn) {       Log. i ( TAG , "********** onNotificationPosted" ) ;       Log. i ( TAG , "ID :" + sbn.getId() + " \t " + sbn.getNotification(). tickerText + " \t " + sbn.getPackageName()) ;       myListener .setValue( "Post: " + sbn.getPackageName()) ;    }    @Override    public void onNotificationRemoved (StatusBarNotification sbn) {       Log. i ( TAG , "********** onNotificationRemoved" ) ;       Log. i ( TAG , "ID :" + sbn.getId() + " \t " + sbn.getNotification(). tickerText + " \t " + sbn.getPackageName()) ;       myListener .setValue( "Remove: " + sbn.getPackageName()) ;    }    public void setListener (MyListener myListener) {       NotificationService. myListener = myListener ;    } }

Step 4 − Add the following code to res/menu/menu_main.xml.

<? xml version = "1.0" encoding = "utf-8" ?> <menu xmlns: android = "http://schemas.android.com/apk/res/android"    xmlns: app = "http://schemas.android.com/apk/res-auto"    xmlns: tools = "http://schemas.android.com/tools"    tools :context = ".MainActivity" >    <item       android :id = "@+id/action_settings"       android :orderInCategory = "100"       android :title = "Settings"       app :showAsAction = "never" /> </menu>

Step 5 − Add the following code to res/layout/activity_main.xml.

<? xml version = "1.0" encoding = "utf-8" ?> <RelativeLayout xmlns: android = "http://schemas.android.com/apk/res/android"    xmlns: tools = "http://schemas.android.com/tools"    android :layout_width = "match_parent"    android :layout_height = "match_parent"    android :padding = "16dp"    tools :context = ".MainActivity" >    <Button       android :id = "@+id/btnCreateNotification"       android :layout_width = "wrap_content"       android :layout_height = "wrap_content"       android :layout_alignParentStart = "true"       android :layout_alignParentTop = "true"       android :layout_alignParentEnd = "true"       android :text = "Create Notification" />    <ScrollView       android :layout_width = "match_parent"       android :layout_height = "match_parent"       android :layout_below = "@+id/btnCreateNotification"       android :layout_alignStart = "@+id/btnCreateNotification"       android :layout_alignEnd = "@+id/btnCreateNotification"       android :layout_alignParentBottom = "true" >       <TextView          android :id= "@+id/textView"          android :layout_width= "match_parent"          android :layout_height= "wrap_content"          android :text= "NotificationListenerService Example"          android :textAppearance= "?android:attr/textAppearanceMedium" />    </ScrollView> </RelativeLayout>

Step 6 − Add the following code to src/MainActivity.java

package app.tutorialspoint.com.notifyme ; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.content.Intent ; import android.os.Bundle ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.view.Menu ; import android.view.MenuItem ; import android.view.View ; import android.widget.Button ; import android.widget.TextView ; public class MainActivity extends AppCompatActivity implements MyListener {    private TextView txtView ;    public static final String NOTIFICATION_CHANNEL_ID = "10001" ;    private final static String default_notification_channel_id = "default" ;    @Override    protected void onCreate (Bundle savedInstanceState) {       super .onCreate(savedInstanceState) ;       setContentView(R.layout. activity_main ) ;       new NotificationService().setListener( this ) ;       txtView = findViewById(R.id. textView ) ;       Button btnCreateNotification = findViewById(R.id. btnCreateNotification ) ;       btnCreateNotification.setOnClickListener( new View.OnClickListener() {          @Override          public void onClick (View v) {             NotificationManager mNotificationManager = (NotificationManager) getSystemService( NOTIFICATION_SERVICE ) ;             NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(MainActivity. this, default_notification_channel_id ) ;             mBuilder.setContentTitle( "My Notification" ) ;             mBuilder.setContentText( "Notification Listener Service Example" ) ;             mBuilder.setTicker( "Notification Listener Service Example" ) ;             mBuilder.setSmallIcon(R.drawable. ic_launcher_foreground ) ;             mBuilder.setAutoCancel( true ) ;             if (android.os.Build.VERSION. SDK_INT >= android.os.Build.VERSION_CODES. O ) {                int importance = NotificationManager. IMPORTANCE_HIGH ;                NotificationChannel notificationChannel = new NotificationChannel( NOTIFICATION_CHANNEL_ID , "NOTIFICATION_CHANNEL_NAME" , importance) ;                mBuilder.setChannelId( NOTIFICATION_CHANNEL_ID ) ;                assert mNotificationManager != null;                mNotificationManager.createNotificationChannel(notificationChannel) ;             }             assert mNotificationManager != null;             mNotificationManager.notify(( int ) System. currentTimeMillis () , mBuilder.build()) ;          }       }) ;    }    @Override    public boolean onCreateOptionsMenu (Menu menu) {       getMenuInflater().inflate(R.menu. menu_main , menu) ; //Menu Resource, Menu       return true;    }    @Override    public boolean onOptionsItemSelected (MenuItem item) {       switch (item.getItemId()) {          case R.id. action_settings :             Intent intent = new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS" ) ;             startActivity(intent) ;             return true;          default :             return super .onOptionsItemSelected(item) ;       }    }    @Override    public void setValue (String packageName) {       txtView .append( " 
 " + packageName) ;    } }

Step 7 − Add the following code to AndroidManifest.xml

<? xml version = "1.0" encoding = "utf-8" ?> <manifest xmlns: android = "http://schemas.android.com/apk/res/android"    package = "app.tutorialspoint.com.notifyme" >    <uses-permission android :name = "android.permission.VIBRATE" />    <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" >          <intent-filter>             <action android :name = "android.intent.action.MAIN" />             <category android :name = "android.intent.category.LAUNCHER" />          </intent-filter>       </activity>       <service          android :name = ".NotificationService"          android :label = "@string/app_name"          android :permission = "android.permission.BIND_NOTIFICATION_LISTENER_SERVICE" >          <intent-filter>             <action android :name = "android.service.notification.NotificationListenerService" />          </intent-filter>       </service>    </application> </manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

Click  here  to download the project code