This demo will show how to
1. Create and add a new Notification,
2. How many notifications are active in the current Application?
3. Delegate method for Notification Deletion.
For Adding a Notification we can use the following snippet.
// Create a Notification and notify the system.final Notification.Builder builder = new Notification.Builder(getActivity()) .setSmallIcon(R.mipmap.ic_notification) .setContentTitle(getString(R.string.app_name)) .setContentText(getString(R.string.sample_notification_content)) .setAutoCancel(true) .setDeleteIntent(mDeletePendingIntent);final Notification notification = builder.build();mNotificationManager.notify(++mNotificationId, notification); |
For reading the number of currently Active notifications we can use
// Query the currently displayed notifications.final StatusBarNotification[] activeNotifications = mNotificationManager .getActiveNotifications();final int numberOfNotifications = activeNotifications.length;mNumberOfNotifications.setText(getString(R.string.active_notifications, numberOfNotifications)); |
To know when a Notification is deleted.
// Create a PendingIntent to be fired upon deletion of a Notification.Intent deleteIntent = new Intent(ActiveNotificationActivity.ACTION_NOTIFICATION_DELETE);mDeletePendingIntent = PendingIntent.getBroadcast(getActivity(), 2323 /* requestCode */, deleteIntent, 0); |
ActiveNotificationActivity.java (Activity when notification is clicked).
package com.example.android.activenotifications;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.os.PersistableBundle;public class ActiveNotificationActivity extends MainActivity { private ActiveNotificationFragment mFragment; protected static final String ACTION_NOTIFICATION_DELETE = "com.example.android.activenotifications.delete"; private BroadcastReceiver mDeleteReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (mFragment == null) { findFragment(); } mFragment.updateNumberOfNotifications(); } }; @Override public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) { super.onCreate(savedInstanceState, persistentState); findFragment(); mFragment.updateNumberOfNotifications(); } private void findFragment() { mFragment = (ActiveNotificationFragment) getSupportFragmentManager() .findFragmentById(R.id.sample_content_fragment); } @Override protected void onResume() { super.onResume(); registerReceiver(mDeleteReceiver, new IntentFilter(ACTION_NOTIFICATION_DELETE)); } @Override protected void onPause() { super.onPause(); unregisterReceiver(mDeleteReceiver); }} |
You can download the complete source Code from here.