Android: Screen lock source code (Locks the screen to turn on)

AndroidManifest.xml

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

Source:

       private PowerManager.WakeLock mWLock;

       @Override

       protected void onStart() {

             super.onStart();

             try {

                    PowerManager pm =

                                  (PowerManager)getSystemService(Context.POWER_SERVICE);

                    mWLock = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK

                                 | PowerManager.FULL_WAKE_LOCK

                                 | PowerManager.ACQUIRE_CAUSES_WAKEUP, "Lock Name");

                    mWLock.acquire();

             } catch(Exception e) {

                    Log.e("ScreenLock", "onStart()::acquire() failed " + e.toString());

             }

       }

       @Override

       protected void onStop() {

             try {

                    mWLock.release();

            } catch(Exception e) {}

     }