package com.example.iimanager;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.Menu;
import android.widget.Toast;

public class IIManagerActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_iimanager);
        AlarmManager mgr=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
        Intent i=new Intent(this, SampleService.class);
        PendingIntent pi=PendingIntent.getService(this, 0, i, 0);
        mgr.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,  SystemClock.elapsedRealtime(), AlarmManager.INTERVAL_FIFTEEN_MINUTES/900, pi);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_iimanager, menu);
        return true;
    }
}

package com.example.iimanager;

import android.app.IntentService;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class SampleService extends IntentService {

    public SampleService() {
        super("SimpleService");
        //Toast.makeText(getApplicationContext(), "this is my Toast message!!! =)", Toast.LENGTH_LONG).show();
    }

    @Override
    protected void onHandleIntent(Intent intent) {
         //do something
        Toast.makeText(getApplicationContext(), "this is my Toast message!!! =)", Toast.LENGTH_LONG).show();
    }
}

class CustomTimerTask extends TimerTask {
private Context context;
private Handler mHandler = new Handler();
        // Write Custom Constructor to pass Context
    public CustomTimerTask(Context con) {
        this.context = con;
    }

    @Override
    public void run() {
    new Thread(new Runnable() {
        @Override
        public void run() {
            mHandler.post(new Runnable() {
            @Override
            public void run() {
Toast.makeText(getApplicationContext(), "this is my Toast message!!! =)", Toast.LENGTH_LONG).show();
        }
    });
}
}).start();

}

    }

public class Toaster extends Thread{
    public void run(){
    //Your code to loop

    thread.sleep(60000)
         }
    }