title: Display screen/activity on Unlock event?
body: <p>I essentially want to display a screen whenever the screen is unlocked regardless of the application already running.</p>
  
  <p>Can someone just tell me how to display text as soon as the phone gets unlocked. I can take it from then on.</p>
  
  <p>I have the following code up till now which I found on the net....</p>
  
  <p>Suppose I want to display <code>abc.xml</code> as soon as the phone gets unlocked. How will i add it in the ScreenReceiver Class ? </p>
  
  <p>Also I do not want to set any screen when the application runs.Do I need to run the code below as service ?</p>
  
  <pre><code>public class SampleActivity extends Activity {
  
  //Declare the necessary variables
  private BroadcastReceiver mReceiver;
  
  
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
  
       filter.addAction(Intent.ACTION_SCREEN_OFF);
       filter.addAction(Intent.ACTION_USER_PRESENT);
  
       mReceiver = new ScreenReceiver();
       registerReceiver(mReceiver, filter);
  
     }
  
  
      @Override
      public void onDestroy()
      {
          super.onDestroy();
          Log.v("$$$$$$", "In Method: onDestroy()");
  
          if (mReceiver != null)
          {
               unregisterReceiver(mReceiver);
               mReceiver = null;
          }          
  
      }
  
  }
  </code></pre>
  
  <p>where the Screen Reciever class is as follows</p>
  
  <pre><code>public class ScreenReceiver extends BroadcastReceiver {
  
     @Override
     public void onReceive(Context context, Intent intent)
     {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF))
        {    
              Log.v("$$$$$$", "In Method:  ACTION_SCREEN_OFF");
              // onPause() will be called.
        }
        else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON))
        {
              Log.v("$$$$$$", "In Method:  ACTION_SCREEN_ON");
              //onResume() will be called.
  
              //  Better check for whether the screen was already locked
              //if locked, do not take any resuming action in onResume()
  
              //Suggest you, not to take any resuming action here.       
        }
        else if(intent.getAction().equals(Intent.ACTION_USER_PRESENT))
        {
              Log.v("$$$$$$", "In Method:  ACTION_USER_PRESENT");
              //  Handle resuming events
  
        }
  
     }
  }
  </code></pre>