Create Repeating Alarm Start After Each 2 Minutes

In This example creating a simple repeating alarm system with the use of AlarmManager. Alarm will start after each 2 mins.

Steps :

   1. Using AlarmManager class to repeating and called a PendingIntent after each 2 min.
   2. Call a media file on PendingIntent and start media file.
   3. So after each 2 min AlarmManager will call PendingIntent a media file start.

Project Structure :

File : AndroidMainifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.alarmmanagerexample"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

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

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".RingAlarm"
            android:label="@string/app_name" />
    </application>

</manifest>

File : src/AlarmManagerExample.java

Create a alarm with the use of AlarmManager which will call a pending indent RingAlarm after each 2 minutes.

import android.os.Bundle;
import android.os.SystemClock;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;

public class AlarmManagerExample extends Activity {
    
    @Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_alarm_manager_example);
		
		
		try {
			
	        //Create a new PendingIntent and add it to the AlarmManager
	        Intent intent = new Intent(this, RingAlarm.class);
	        PendingIntent pendingIntent = PendingIntent.getActivity(this,
	            12345, intent, PendingIntent.FLAG_CANCEL_CURRENT);
	        AlarmManager am =
	            (AlarmManager)getSystemService(Activity.ALARM_SERVICE);
	        am.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(),
	        		2*60*60,pendingIntent);
			
		  } catch (Exception e) {}
	}
}

File : src/RingAlarm.java

RingAlarm class create media player and start a audio file after each 2 minutes.

import android.app.Activity;
import android.content.Context;
import android.media.MediaPlayer;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;

public class RingAlarm extends Activity {
	    
	   MediaPlayer mp=null ;
	  
		@Override
		protected void onCreate(Bundle savedInstanceState) {
			
			        super.onCreate(savedInstanceState);
			        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
			        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
			                WindowManager.LayoutParams.FLAG_FULLSCREEN);
			        
			        setContentView(R.layout.alarm);
			        Button stopAlarm = (Button) findViewById(R.id.stopAlarm);
			        
			        mp = MediaPlayer.create(getBaseContext(),R.raw.audio);
			        
			        
			        stopAlarm.setOnTouchListener(new OnTouchListener() {
			            
						@Override
						public boolean onTouch(View arg0, MotionEvent arg1) {
							// TODO Auto-generated method stub
							mp.stop();
			                finish();
			                return false;
						}
			        });
			 
			        playSound(this, getAlarmUri());
			    }
			 
			    private void playSound(final Context context, Uri alert) {
			         
			        
			        Thread background = new Thread(new Runnable() {
						public void run() {
							try {
								
	    		               mp.start();
	    		               
							} catch (Throwable t) {
								Log.i("Animation", "Thread  exception "+t);
							}	
				        }
	        	 });
	        	 background.start();
			   }
			 
			    @Override
				protected void onDestroy() {
					super.onDestroy();
					mp.stop();
				}		        //Get an alarm sound. Try for an alarm. If none set, try notification,
			        //Otherwise, ringtone.
			    private Uri getAlarmUri() {
			    	
			        Uri alert = RingtoneManager
			                .getDefaultUri(RingtoneManager.TYPE_ALARM);
			        if (alert == null) {
			            alert = RingtoneManager
			                    .getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
			            if (alert == null) {
			                alert = RingtoneManager
			                        .getDefaultUri(RingtoneManager.TYPE_RINGTONE);
			            }
			        }
			        return alert;
			    }
			
}