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    copied!<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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