Unlock Android phone programmatically?

Question

I want to write the code on how to unlock the Android Phone programmatically.

I want lock or unlock the phone when the user taps the proximity sensor.

Answer 1

@Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
         IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);
            registerReceiver(mIntentReceiver, filter);
            System.out.println("BROADcast receiver registered****");
    }

     private BroadcastReceiver mIntentReceiver = new BroadcastReceiver(){

        @Override
        public void onReceive(Context context, Intent intent) {
            // TODO Auto-generated method stub

                System.out.println("phone locked"); 

        }