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POHow to run a application always in background to show a notification in android
 

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  1. POHow to run a application always in background to show a notification in android
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    <p>I am trying to show a notification whenever any new data come into server. But I am facing a problem. It is only showing notification when i am opening the activity. But it is not running in background. I am using service to run the functionality in background. Can any one tell me how to run this application always in background, if the app closed then also?</p> <p>I am calling the service in onCreate method of the main activity like this:</p> <pre><code> public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.dashboard); startService(new Intent(this, ReviewUpdateService.class)); ..... } </code></pre> <p>and in ReviewUpdateService.class i have written this code: </p> <pre><code> public class ReviewUpdateService extends IntentService{ private Notification.Builder earthquakeNotificationBuilder; public static final int NOTIFICATION_ID = 1; public static String QUAKES_REFRESHED = "com.example.androidhive.QUAKES_REFRESHED"; private String user_id; JSONObject jsonData; private static String share_pref_file = "json_file"; JSONArray service_notification; int no_of_notify; public ReviewUpdateService() { super("ReviewUpdateService"); } private AlarmManager alarmManager; private PendingIntent alarmIntent; public void onCreate() { super.onCreate(); alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE); SharedPreferences prefs = getSharedPreferences(share_pref_file, Context.MODE_PRIVATE); String strJson = prefs.getString("jsondata", ""); if (!strJson.equals("")) { try { jsonData = new JSONObject(strJson); user_id = jsonData.getString(LoginActivity.KEY_UID); } catch (JSONException e) { e.printStackTrace(); } } String ALARM_ACTION = ReviewAlarmReceiver.ACTION_REFRESH_DASHBOARD_ALARM; Intent intentToFire = new Intent(ALARM_ACTION); alarmIntent = PendingIntent.getBroadcast(this, 0, intentToFire, 0); earthquakeNotificationBuilder = new Notification.Builder(this); earthquakeNotificationBuilder .setAutoCancel(true) .setTicker("New Review detected") .setSmallIcon(R.drawable.icon_1); } public void refreshEarthquakes(String formattedDate) { // Get the XML //URL url; UserFunctions userFunctions = new UserFunctions();; try { Log.d("user_id", user_id); JSONObject json_city = userFunctions .getNotification(user_id, formattedDate); if(json_city!=null){ { try { String notify_get_id = json_city.getString(LoginActivity.KEY_NO_NOTIFY); no_of_notify = Integer.parseInt(notify_get_id); service_notification = json_city .getJSONArray(LoginActivity.KEY_SERVICE_NOTIFY); } catch (JSONException e) { e.printStackTrace(); } } } if(service_notification!=null) { // looping through all item nodes &lt;item&gt; for (int i = 0; i &lt; service_notification.length(); i++) { try { JSONObject c = service_notification.getJSONObject(i); String dealer = c.getString("Dealer Rater"); String google = c.getString("Google+ Local"); String car = c.getString("Cars.com"); String edmunds = c.getString("Edmunds.com"); String yelp = c.getString("Yelp"); String yahoo = c.getString("Yahoo! Local"); String insider = c.getString("Insider Pages"); String city = c.getString("City Search"); int dealer2 = Integer.parseInt(dealer); int google2 = Integer.parseInt(google); int car2 = Integer.parseInt(car); int edmunds2 = Integer.parseInt(edmunds); int yelp2 = Integer.parseInt(yelp); int yahoo2 = Integer.parseInt(yahoo); int insider2 = Integer.parseInt(insider); int city2 = Integer.parseInt(city); String service_unit1 = "Dealer Rater"; String service_unit2 = "Google+ Local"; String service_unit3 = "Cars.com"; String service_unit4 = "Edmunds.com"; String service_unit5 = "Yelp"; String service_unit6 = "Yahoo! Local"; String service_unit7 = "Insider Pages"; String service_unit8 = "City Search"; if(dealer2 &gt; 0 ) { if(no_of_notify &gt; 0){ broadcastNotification(no_of_notify,service_unit1); } }else if(google2 &gt; 0 ) { if(no_of_notify &gt; 0){ broadcastNotification(no_of_notify,service_unit2); } }else if(car2 &gt; 0 ) { if(no_of_notify &gt; 0){ broadcastNotification(no_of_notify,service_unit3); } }else if(edmunds2 &gt; 0 ) { if(no_of_notify &gt; 0){ broadcastNotification(no_of_notify,service_unit4); } }else if(yelp2 &gt; 0 ) { if(no_of_notify &gt; 0){ broadcastNotification(no_of_notify,service_unit5); } }else if(yahoo2 &gt; 0 ) { if(no_of_notify &gt; 0){ broadcastNotification(no_of_notify,service_unit6); } }else if(insider2 &gt; 0 ) { if(no_of_notify &gt; 0){ broadcastNotification(no_of_notify,service_unit7); } }else if(city2 &gt; 0 ) { if(no_of_notify &gt; 0){ broadcastNotification(no_of_notify,service_unit8); } } } catch (JSONException e) { e.printStackTrace(); } } } // } } finally { } } @Override protected void onHandleIntent(Intent intent) { int updateFreq = 60; Calendar calender = Calendar.getInstance(); System.out.println("Current time =&gt; "+calender.getTime()); SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm"); String formattedDate = df.format(calender.getTime()); Log.d("time", formattedDate); int alarmType = AlarmManager.ELAPSED_REALTIME_WAKEUP; long timeToRefresh = SystemClock.elapsedRealtime() + updateFreq*60*1000; alarmManager.setInexactRepeating(alarmType, timeToRefresh, updateFreq*60*1000, alarmIntent); refreshEarthquakes(formattedDate); sendBroadcast(new Intent(QUAKES_REFRESHED)); } private void broadcastNotification(int no_of_review, String service_name ) { Intent startActivityIntent = new Intent(this, DashboardActivity.class); PendingIntent launchIntent = PendingIntent.getActivity(this, 0, startActivityIntent, 0); earthquakeNotificationBuilder .setContentIntent(launchIntent) .setContentTitle( no_of_review+" "+"new review is there" ) .setContentText(service_name); if (no_of_review &gt; 10) { Uri ringURI = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION); earthquakeNotificationBuilder.setSound(ringURI); } double vibrateLength = 100*Math.exp(0.53*no_of_review); long[] vibrate = new long[] {100, 100, (long)vibrateLength }; earthquakeNotificationBuilder.setVibrate(vibrate); int color; if (no_of_review &lt; 2) color = Color.GREEN; else if (no_of_review &lt; 5) color = Color.YELLOW; else color = Color.RED; earthquakeNotificationBuilder.setLights( color, (int)vibrateLength, (int)vibrateLength); NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE); notificationManager.notify(NOTIFICATION_ID, earthquakeNotificationBuilder.getNotification()); } } </code></pre> <p>And In a reciver method i have added a class like this:</p> <pre><code> public class ReviewAlarmReceiver extends BroadcastReceiver{ public static final String ACTION_REFRESH_DASHBOARD_ALARM = "com.example.androidhive.ACTION_REFRESH_EARTHQUAKE_ALARM"; @Override public void onReceive(Context context, Intent intent) { // TODO Auto-generated method stub Intent startIntent = new Intent(context, ReviewUpdateService.class); context.startService(startIntent); } </code></pre> <p>}</p> <p>And in Android.manifest file i have modified like this:</p> <pre><code> ......... &lt;service android:enabled="true" android:name=".ReviewUpdateService"/&gt; &lt;receiver android:name=".ReviewAlarmReceiver"&gt; &lt;intent-filter&gt; &lt;action android:name="com.example.androidhive.ACTION_REFRESH_EARTHQUAKE_ALARM" /&gt; &lt;/intent-filter&gt; &lt;/receiver&gt; ........ </code></pre> <p>I don't know what is the problem running on. Can anyone help me? Thanks in advance.</p>
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