android - How to keep broadcast recevier alive even after restarting the phone? -

i trying make app in using broadcast receiver. requirement keep broadcast receiver alive when install application in phone , exiting out after running it. able requirement,but when killing application use of task manager, broadcast receiver not triggering, , want keep broadcast receiver alive restarting phone.here code main activity:

    protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);              telephonymanager = (telephonymanager)     getsystemservice(context.telephony_service);         phonestatelistener psl = new phonestatelistener() {             @override             public void oncallstatechanged(int state, string incomingnumber) {                 // todo auto-generated method stub                  if (state == telephonymanager.call_state_ringing) {                     intent intent2open = new intent(mainactivity.this,                             mainactivity.class);                     intent2open.setflags(intent.flag_activity_brought_to_front                             | intent.flag_activity_new_task                             | intent.flag_activity_previous_is_top                             | intent.flag_activity_multiple_task);                     intent2open.setaction("android.intent.action.view");                     intent2open.addflags(intent.flag_activity_clear_top);                     intent2open.setaction(intent.action_main);                     intent2open.addcategory(intent.category_launcher);                     intent2open.setflags(0);          toast.make_text(context(),             "incoming call" + incomingnumber, toast.lengthlong)                             .show();                 }                 super.oncallstatechanged(state, incomingnumber);             }         };         telephony manager.listen(psl, phonestatelistener.listen_call_state);      } 

below broadcast receiver code:

@override     public void on receive(context context, intent intent) {         // auto-generated method stub          string state = intent.get string extra(telephony manager.action_phone_state_changed);          if(state.equals(telephony manager.call_state_ringing))         {             intent intent2 = new intent("com.example.app.activity");             intent2.putextras(intent2);             intent2.addflags(intent.flag_activity_new_task);             context.startactivity(intent2);          }      } 

below manifest.xml code:

    <application          <activity             android:name="com.example.app.activity"             android:label="@string/app_name" >             <intent-filter>                 <action android:name="android.intent.action.main" />                  <category android:name="android.intent.category.launcher" />             </intent-filter>         </activity>         <receiver android:name="com.example.app.receiver"             android:exported="true"             android:enabled="true">              <intent-filter>                 <action android:name="com.example.app.activity" />         </intent-filter>         </receiver>     </application> 

please me!!!..... thank in advance.

you can create service , register broadcast receiver in service. should start service using startservice runs always. running after reboot create broadcast receiver registered booting complete action , start ^service.