package com.example.service_m;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;

public class ServiceCode extends Service{

    @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

          for(int i=0;i<=10;i++){
              Toast.makeText(getApplicationContext(), "hello world",
                       Toast.LENGTH_LONG).show();
              try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
          }

        return Service.START_NOT_STICKY;
      }

}

package com.example.service_m;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class ServiceStarter extends BroadcastReceiver{

     @Override
        public void onReceive(Context _context, Intent _intent) {

            Intent i = new Intent("com.example.service_m");
            i.setClass(_context, ServiceCode.class);
            _context.startService(i);
        }


}

<application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.service_m.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
            </intent-filter>
        </activity>
                <receiver android:name="com.example.service_m.ServiceStarter" >
            <intent-filter >
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>
    </application>