notification manager android

1NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(yourContext.getApplicationContext(), "notify_001");
2Intent ii = new Intent(yourContext.getApplicationContext(), YourMainActivty.class);
3PendingIntent pendingIntent = PendingIntent.getActivity(yourContext, 0, ii, 0);
4
5NotificationCompat.BigTextStyle bigText = new NotificationCompat.BigTextStyle();
6bigText.bigText(notificationsTextDetailMode); //detail mode is the "expanded" notification
7bigText.setBigContentTitle(notificationTitleDetailMode);
8bigText.setSummaryText(usuallyAppVersionOrNumberOfNotifications); //small text under notification
9
10mBuilder.setContentIntent(pendingIntent);
11mBuilder.setSmallIcon(R.mipmap.ic_launcher); //notification icon
12mBuilder.setContentTitle(notificationTitle); //main title
13mBuilder.setContentText(notificationText); //main text when you "haven't expanded" the notification yet
14mBuilder.setPriority(Notification.PRIORITY_MAX);
15mBuilder.setStyle(bigText);
16
17NotificationManager mNotificationManager = (NotificationManager) yourContext.getSystemService(Context.NOTIFICATION_SERVICE);
18
19NotificationChannel channel = new NotificationChannel("notify_001",
20                                                      "Channel human readable title",
21                                                      NotificationManager.IMPORTANCE_DEFAULT);
22if (mNotificationManager != null) {
23  mNotificationManager.createNotificationChannel(channel);
24}
25
26if (mNotificationManager != null) {
27  mNotificationManager.notify(0, mBuilder.build());
28}

1package com.example.notificationdemo;
2
3import android.app.Activity;
4import android.app.NotificationManager;
5import android.app.PendingIntent;
6import android.content.Context;
7import android.content.Intent;
8import android.support.v4.app.NotificationCompat;
9import android.os.Bundle;
10import android.view.View;
11import android.widget.Button;
12
13public class MainActivity extends Activity {
14   Button b1;
15   @Override
16   protected void onCreate(Bundle savedInstanceState) {
17      super.onCreate(savedInstanceState);
18      setContentView(R.layout.activity_main);
19
20      b1 = (Button)findViewById(R.id.button);
21      b1.setOnClickListener(new View.OnClickListener() {
22         @Override
23         public void onClick(View v) {
24            addNotification();
25         }
26      });
27   }
28
29   private void addNotification() {
30      NotificationCompat.Builder builder =
31         new NotificationCompat.Builder(this)
32         .setSmallIcon(R.drawable.abc)
33         .setContentTitle("Notifications Example")
34         .setContentText("This is a test notification");
35
36      Intent notificationIntent = new Intent(this, MainActivity.class);
37      PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent,
38         PendingIntent.FLAG_UPDATE_CURRENT);
39      builder.setContentIntent(contentIntent);
40
41      // Add as notification
42      NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
43      manager.notify(0, builder.build());
44   }
45}