How to setUp a repeating Alarm in Android?

Today I am going to show you how to set up a repeating alarm in android. In the previous post I showed you how to set up a simple alarm. An in this post I will show you how to set Up a Repeating Alarm.

For this you need an extra class just to notify that the repeating alarm is called.
Let’a look at the java code.

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package pack.coderzheaven;   import java.util.Calendar;   import android.app.Activity; import android.app.AlarmManager; import android.app.PendingIntent; import android.content.Intent; import android.os.Bundle; import android.os.SystemClock; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast;   public class AlarmDemo extends Activity {     Toast mToast;       @Override         protected void onCreate(Bundle savedInstanceState) {             super.onCreate(savedInstanceState);             setContentView(R.layout.main);               Button button = (Button)findViewById(R.id.one_shot);             button.setOnClickListener(mOneShotListener);             button = (Button)findViewById(R.id.start_repeating);             button.setOnClickListener(mStartRepeatingListener);             button = (Button)findViewById(R.id.stop_repeating);             button.setOnClickListener(mStopRepeatingListener);         }           private OnClickListener mOneShotListener = new OnClickListener() {             public void onClick(View v) {                   Intent intent = new Intent(AlarmDemo.this, MyAlarmReceiver.class);                 PendingIntent sender = PendingIntent.getBroadcast(AlarmDemo.this,                         0, intent, 0);                   // We want the alarm to go off 10 seconds from now.                 Calendar calendar = Calendar.getInstance();                 calendar.setTimeInMillis(System.currentTimeMillis());                 calendar.add(Calendar.SECOND, 10);                   // Schedule the alarm!                 AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);                 am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);                   // Tell the user about what we did.                 if (mToast != null) {                     mToast.cancel();                 }                 mToast = Toast.makeText(AlarmDemo.this,"Alarm Started",                         Toast.LENGTH_LONG);                 mToast.show();             }         };           private OnClickListener mStartRepeatingListener = new OnClickListener() {             public void onClick(View v) {                   Intent intent = new Intent(AlarmDemo.this, RepeatingAlarm.class);                 PendingIntent sender = PendingIntent.getBroadcast(AlarmDemo.this,                         0, intent, 0);                   // We want the alarm to go off 5 seconds from now.                 long firstTime = SystemClock.elapsedRealtime();                 firstTime += 5*1000;                   // Schedule the alarm!                 AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);                 am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,                                 firstTime, 5*1000, sender);                   // Tell the user about what we did.                 if (mToast != null) {                     mToast.cancel();                 }                 mToast = Toast.makeText(AlarmDemo.this, "Rescheduled",                         Toast.LENGTH_LONG);                 mToast.show();             }         };           private OnClickListener mStopRepeatingListener = new OnClickListener() {             public void onClick(View v) {                 // Create the same intent, and thus a matching IntentSender, for                 // the one that was scheduled.                 Intent intent = new Intent(AlarmDemo.this, RepeatingAlarm.class);                 PendingIntent sender = PendingIntent.getBroadcast(AlarmDemo.this,                         0, intent, 0);                   // And cancel the alarm.                 AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);                 am.cancel(sender);                   // Tell the user about what we did.                 if (mToast != null) {                     mToast.cancel();                 }                 mToast = Toast.makeText(AlarmDemo.this,"Repeating Alarm Unscheduled.",                         Toast.LENGTH_LONG);                 mToast.show();             }         };     }

Here we have three buttons one to set up a simple Alarm that is a one shot alarm and other button is for starting a repeating alarm and the third button for stopping the repeating alarm.
Now let’s see how the layout looks like. 

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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical" android:padding="4dip"     android:gravity="center_horizontal"     android:layout_width="fill_parent" android:layout_height="fill_parent">       <TextView         android:layout_width="fill_parent" android:layout_height="wrap_content"         android:layout_weight="0"         android:paddingBottom="4dip"         android:text="Alarm Demo from CoderzHeaven"/>       <Button android:id="@+id/one_shot"         android:layout_width="wrap_content" android:layout_height="wrap_content"         android:text="Start Alarm">         <requestFocus />     </Button>       <Button android:id="@+id/start_repeating"         android:layout_width="wrap_content" android:layout_height="wrap_content"         android:text="Start Repeating Alarm" />        <Button android:id="@+id/stop_repeating"         android:layout_width="wrap_content" android:layout_height="wrap_content"         android:text="Stop Repeating Alarm" />   </LinearLayout>

Now create a new class named “RepeatingAlarm.java” and copy this code into it. This class receives the repeating alarm intent.
The “MyAlarmReceiver.java” file is included in this post. Please copy that also

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package pack.coderzheaven;   import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.widget.Toast;   public class RepeatingAlarm extends BroadcastReceiver {     @Override     public void onReceive(Context context, Intent intent)     {         Toast.makeText(context,"Repeating Alarm Received", Toast.LENGTH_SHORT).show();     } }

Here is the AndroidManifest file

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<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"       package="pack.coderzheaven"       android:versionCode="1"       android:versionName="1.0">     <application android:icon="@drawable/icon" android:label="@string/app_name">         <activity android:name=".AlarmDemo"                   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=".MyAlarmReceiver" android:process=":remote" />     <receiver android:name=".RepeatingAlarm" android:process=":remote" />     </application> </manifest>

Now run it and see the result.