I am implementing Service for receiving push notifications in Android device. The notifications are successfully received when app is in foreground. When app is closed and its instance is cleared from task manager, notifications are not received.
I want to keep the service running at all the times and it should not stop even if the app is cleared from the task manager.
I start the service from my activity in a button click. When i click the button my service starts and it gives me Toast notification every one minute but if I press the back button then also my service is running but , as soon as i clear my app from the recent activity list which is shown on long press of home button my service is stoped and if again i start my app and check the status of the service but its not running.
I want my service to run even if my app is closed.
This is my activity class
package com.example.hello;
import java.util.ArrayList;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningServiceInfo;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
public class MainActivity extends Activity {
Button btnSer;
int Pointer=0;
ListView lv;
ArrayList<String> alist=new ArrayList<String>();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnSer=(Button) findViewById(R.id.btnstart);
btnSer.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
//start the service when the button is clicked
Log.e("","status of service : "+isMyServiceRunning(MyService.class));
//if(!isMyServiceRunning(MyService.class))
startService(new Intent(getApplicationContext(), MyService.class));
}
});
}
//check if the service is running
private boolean isMyServiceRunning(Class<?> serviceClass) {
ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
if (serviceClass.getName().equals(service.service.getClassName())) {
return true;
}
}
return false;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
This is my Service class.
package com.example.hello;
import java.util.Calendar;
import android.app.Service;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Handler;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class MyService extends Service{
private Handler handlerList = new Handler();
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
//TODO do something useful
Toast.makeText(getApplicationContext(), "On start command called", Toast.LENGTH_LONG).show();
return Service.START_STICKY;
}
public void updateLists(){
handlerList.postDelayed(mUpdateListTask, 1000*60);
}
private Runnable mUpdateListTask = new Runnable() {
public void run() { //will make a toast notification every 1 minute.
Calendar cal = Calendar.getInstance();
Log.e("","Thread executed at "+cal.get(Calendar.HOUR_OF_DAY)+":"+cal.get(Calendar.MINUTE)+":"+cal.get(Calendar.SECOND)+":");
Toast.makeText(getApplicationContext(), "Thread executed at "+cal.get(Calendar.HOUR_OF_DAY)+":"+cal.get(Calendar.MINUTE)+":"+cal.get(Calendar.SECOND)+":", Toast.LENGTH_LONG).show();
handlerList.postDelayed(this, 1000*60);
}};
@Override
public void onCreate() {
updateLists();
Toast.makeText(this, "Congrats! MyService Created", Toast.LENGTH_LONG).show();
Log.d("", "onCreate in service");
}
@Override
public void onStart(Intent intent, int startId) {
Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
Log.d("", "onStart in service");
}
@Override
public void onDestroy() {
Toast.makeText(this, "MyService Stopped", Toast.LENGTH_LONG).show();
Log.d("", "onDestroy in service");
}
}
also added the permission in manifest file
<uses-permission android:name="android.permission.WAKE_LOCK" />
