<service
  android:name=".NotificationCollectorService"
  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>

public class NotificationCollectorService extends NotificationListenerService {
  @Override
  public void onNotificationPosted(StatusBarNotification sbn) {
    Log.i("xiaolong", "open" + "-----" + sbn.getPackageName());
    Log.i("xiaolong", "open" + "------" + sbn.getNotification().tickerText);
    Log.i("xiaolong", "open" + "-----" + sbn.getNotification().extras.get("android.title"));
    Log.i("xiaolong", "open" + "-----" + sbn.getNotification().extras.get("android.text"));
  }

  @Override
  public void onNotificationRemoved(StatusBarNotification sbn) {
    Log.i("xiaolong", "remove" + "-----" + sbn.getPackageName());

  }
}

public class MainActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    String string = Settings.Secure.getString(getContentResolver(),
        "enabled_notification_listeners");
    if (!string.contains(NotificationCollectorService.class.getName())) {
      startActivity(new Intent(
          "android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS"));
    }
  }
}