Send a notification when the app is closed
You can use this service all you need to do is Start this service onStop() in your activity lifecycle. With this code:
startService(new Intent(this, NotificationService.class));
then you can create a new Java Class and paste this code in it:
public class NotificationService extends Service {
Timer timer;
TimerTask timerTask;
String TAG = "Timers";
int Your_X_SECS = 5;
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.e(TAG, "onStartCommand");
super.onStartCommand(intent, flags, startId);
startTimer();
return START_STICKY;
}
@Override
public void onCreate() {
Log.e(TAG, "onCreate");
}
@Override
public void onDestroy() {
Log.e(TAG, "onDestroy");
stoptimertask();
super.onDestroy();
}
//we are going to use a handler to be able to run in our TimerTask
final Handler handler = new Handler();
public void startTimer() {
//set a new Timer
timer = new Timer();
//initialize the TimerTask's job
initializeTimerTask();
//schedule the timer, after the first 5000ms the TimerTask will run every 10000ms
timer.schedule(timerTask, 5000, Your_X_SECS * 1000); //
//timer.schedule(timerTask, 5000,1000); //
}
public void stoptimertask() {
//stop the timer, if it's not already null
if (timer != null) {
timer.cancel();
timer = null;
}
}
public void initializeTimerTask() {
timerTask = new TimerTask() {
public void run() {
//use a handler to run a toast that shows the current timestamp
handler.post(new Runnable() {
public void run() {
//TODO CALL NOTIFICATION FUNC
YOURNOTIFICATIONFUNCTION();
}
});
}
};
}
}
After this you only need to combine the service with the manifest.xml:
<service
android:name=".NotificationService"
android:label="@string/app_name">
<intent-filter>
<action android:name="your.app.domain.NotificationService" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</service>
You can use alarm manager to do this [Not tested on latest Android versions and releases and is a pretty old answer]. Follow below steps :
Use alarmmanager to create an alarm of after X seconds.
Intent intent = new Intent(this, AlarmReceiver.class); intent.putExtra("NotificationText", "some text"); PendingIntent pendingIntent = PendingIntent.getBroadcast(this, ledgerId, intent, PendingIntent.FLAG_UPDATE_CURRENT); AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE); alarmManager.set(AlarmManager.RTC_WAKEUP, 'X seconds in milliseconds', pendingIntent);
Use a AlarmBroadCast receiver in your app.
Declare in manifest file :
<receiver android:name=".utils.AlarmReceiver">
<intent-filter>
<action android:name="android.media.action.DISPLAY_NOTIFICATION" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
In the broadcast receiver's on receive, you can create the notification.
public class AlarmReceiver extends BroadcastReceiver {
@Override public void onReceive(Context context, Intent intent) { // create notification here }
}