Add WakeLock to an Android Project

How to add WakeLock to an Android Project, Step-By-Step

1. Add the WakeLock permission to the AndroidManifest.

<uses-permission android:name="android.permission.WAKE_LOCK" />

2. Add import for PowerManager to MainActivity file

          import android.os.PowerManager.WakeLock;

          import android.os.PowerManager;

          import android.content.Context;

3. Decleare WakeLock as wl in the MainActivity file.

.....
public class MainActivity extends Activity {

     protected PowerManager.WakeLock mWakeLock;

    @Override
    public void onCreate(Bundle savedInstanceState) {
....

3.Add the below code to the onCreatae method.

    final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); 
    this.mWakeLock = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag");
    this.mWakeLock.acquire();

4. Release the WakeLock in the onDestroy.

    @Override
    public void onDestroy() {
        super.onDestroy();
        this.mWakeLock.release();
    }

5. Compile and run!

Resources
http://developer.android.com/reference/android/os/PowerManager.html#newWakeLock(int, java.lang.String)