I would like to implement sending notifications to users from the server using AlarmManager at a time when the user previously set it. The code is as follows:
MainActivity:
public void set_Retrival_then_notifcation_Alarm(Context context, int year, int month, int day, int hour, int min, int sec) { Calendar updateTime = Calendar.getInstance(); updateTime.setTimeZone(TimeZone.getDefault()); updateTime.set(Calendar.YEAR, year); updateTime.set(Calendar.MONTH, month-1); updateTime.set(Calendar.DATE, day); updateTime.set(Calendar.HOUR_OF_DAY, hour); updateTime.set(Calendar.MINUTE, min); updateTime.set(Calendar.SECOND, sec); Intent downloader = new Intent(context, AlarmBroadcastReceiver.class); downloader.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, downloader, PendingIntent.FLAG_CANCEL_CURRENT); AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); alarmManager.set(AlarmManager.RTC_WAKEUP, updateTime.getTimeInMillis(), pendingIntent); }
ParseService:
public class ParseService extends IntentService { static String Parse_AppID = "abc"; static String Parse_ClientKey = "abckey"; String notification_next_price = ""; String notification_next_date = ""; SharedPreferences settings; public class LocalBinder extends Binder { public ParseService getService() { return ParseService.this; } } public ParseService() { super("ParseService"); } @Override public int onStartCommand(Intent intent, int flags, int startId) { super.onStartCommand(intent,flags,startId); return START_STICKY ; } @Override protected void onHandleIntent(Intent intent) { Log.d("MyService", "About to execute MyTask"); new MyTask().execute(); } private class MyTask extends AsyncTask<String, Void, Boolean> { @Override protected Boolean doInBackground(String... strings) { Log.d("MyService - MyTask", "Calling doInBackground within MyTask"); initParse(ParseService.this); get_notification_info(ParseService.this); return false; } } private void sendNotification(Context context, String title, String content) { Log.d("MyService - MyTask", "A - sendNotification"); settings = context.getSharedPreferences("MyApp",0); boolean notify_is_on = settings.getBoolean("notify_is_on", true); int saved_amount = settings.getInt("saved_amount", 800); NumberFormat numberFormat = NumberFormat.getInstance(); int k = 0; try { k = numberFormat.parse(notification_next_price).intValue(); if (notify_is_on && (k >= (saved_amount*10000))) { setNotificationContent(context, k, ""+title, content + ""); } else { Toast.makeText(getApplicationContext(), "No need notification", Toast.LENGTH_SHORT).show(); } } catch (Exception ex) { setNotificationContent(context, k, "Title2", "Content2"); } } public void setNotificationContent(Context context, int k, String title, String content) { Intent notificationIntent = new Intent(context, CurrentResult.class); PendingIntent pi = PendingIntent.getActivity(context, 0, notificationIntent, 0); Notification noti = new Notification.Builder(context) .setTicker("Hello") .setSmallIcon(R.drawable.b06) .setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_launcher)) .setAutoCancel(true) .setOngoing(true) .setOnlyAlertOnce(true) .setContentTitle(""+title) .setContentText(""+content) .setContentIntent(pi) .build(); startForeground(1337, noti); NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); notificationManager.notify(0, noti); stopSelf(); } @Override public void onCreate() { super.onCreate(); } @Override public void onDestroy() { super.onDestroy(); } @Override public IBinder onBind(Intent intent) { return null; } @Override public boolean onUnbind(Intent intent) { return super.onUnbind(intent); } public void initParse(Context context) { try { ...connection to Parse.com } catch (Exception e) { e.printStackTrace(); } } public void get_notification_info(Context context) { ParseQuery<ParseObject> query = ParseQuery.getQuery("Record_db");
AlarmBroadcastManager
public class AlarmBroadcastReceiver extends BroadcastReceiver { public AlarmBroadcastReceiver () { } @Override public void onReceive(Context context, Intent intent) { Intent dailyUpdater = new Intent(context, ParseService.class); context.startService(dailyUpdater); Log.d("AlarmReceiver", "Called context.startService from AlarmReceiver.onReceive"); } }
manifest:
<service android:name="com.abc.abc.ParseService" android:enabled="true" android:exported="true" /> <receiver android:name="com.abc.abc.AlarmBroadcastReceiver" android:enabled="true" android:exported="true" > <intent-filter> <action android:name="android.intent.action.BOOT_COMPLETED" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </receiver>
Question:
Retrieving records from the server and sending notifications work correctly when the application is on the list of recent tasks.
However, if the application is manually removed from the recent task list, the emergency manager and, therefore, the notification is canceled and the notification does not receive.
I have googled and most solutions should return START_STICKY in onStartCommand in order to register with Manifest, but I tried without success.
Could you help me figure out what the problem is? Why can’t the notification be restarted after the application is manually removed from the recent task list? Is there any example for this ParseService work for a user-specified time?
Thanks!