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    <p>Take a look for AlarmManager class <a href="http://developer.android.com/reference/android/app/AlarmManager.html" rel="nofollow">http://developer.android.com/reference/android/app/AlarmManager.html</a> It's something like "cron"</p> <p>Ok, here is a piece of working code - first comes the activity class:</p> <pre><code>import android.app.Activity; import android.app.AlarmManager; import android.app.PendingIntent; import android.content.Intent; import android.os.Bundle; import android.os.PowerManager; import android.os.PowerManager.WakeLock; public class MainActivity extends Activity { private WakeLock wl; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //acquire wake lock PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE); wl = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP|PowerManager.SCREEN_BRIGHT_WAKE_LOCK, "TAG"); wl.acquire(); // schedule alarm Intent i = new Intent(); i.setAction(WakeReciever.WAKE_INTENT); PendingIntent pIntent = PendingIntent.getBroadcast(this, 0, i, 0); AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE); am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 120000, pIntent); } @Override protected void onPause() { wl.release(); super.onPause(); } } </code></pre> <p>Next comes BroadcastReceiver:</p> <pre><code>package com.test; import android.content.BroadcastReceiver; import android.content.Intent; import android.content.Context; import android.os.PowerManager; import android.os.PowerManager.WakeLock; public class WakeReciever extends BroadcastReceiver { public static final String WAKE_INTENT = "com.test.WAKE"; /** * @see android.content.BroadcastReceiver#onReceive(Context,Intent) */ @Override public void onReceive(Context context, Intent intent) { //acquire wake lock PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "TAG"); wl.acquire(); //start activity Intent i = new Intent(); i.setClassName("com.test", "com.test.MainActivity"); i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(i); wl.release(); } } </code></pre> <p>And finally don't forget about the manifest file:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;manifest android:versionCode="1" android:versionName="1.0" package="com.test" xmlns:android="http://schemas.android.com/apk/res/android"&gt; &lt;uses-sdk android:minSdkVersion="8"/&gt; &lt;uses-permission android:name="android.permission.WAKE_LOCK"&gt;&lt;/uses-permission&gt; &lt;application android:icon="@drawable/icon" android:label="@string/app_name"&gt; &lt;activity android:label="@string/app_name" android:name=".MainActivity"&gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN"/&gt; &lt;category android:name="android.intent.category.LAUNCHER"/&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;receiver android:name=".WakeReciever" android:enabled="true"&gt; &lt;intent-filter&gt; &lt;action android:name="com.test.WAKE"&gt;&lt;/action&gt; &lt;/intent-filter&gt; &lt;/receiver&gt; &lt;/application&gt; &lt;/manifest&gt; </code></pre>
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    1. COMy alarm doesn't fire when the device goes into sleeping mode. Any specific alarm method you would suggest?
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    2. COI suggest you to use AlarmManager for generate sheduled intents and BroadcastReciever to aquire wake lock and start your application. This approach saves battery life much more than using handler. BTW - in your code I see try to wake up phone - did you set wake lock for keep phone in active state? Otherwise your application do not even run this code when phone is in sleep mode.
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    3. COYes, I've tried that one also, but it doesn't do anything. As I said, the alarm doesn't fire when the device sleeps. Please see the edited post. I attach the code.
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