how to wake lock using powermanager class in android -

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Hi, I am trying to wake up the lock for a particular amount but I can not find the result, I have a power manager class But I'm not getting any results I'm using to lock this code 

  PowerManager.WakeLock wl; PowerManager pm = (PowerManager) getSystemService (event.pOWER_SERVICE); Wl = pm.newWakeLock (PowerManager.PARTIAL_WAKE_LOCK, "My tag"); Button B = (button) Find VVBIID (R.B. button 1); B.setOnClickListener (New OnClickListener () {@Override Click Public Zero (see ARG0) {wl.acquire (); wl.release ();}}); }   
 Here I am trying to invite lock when I click on the button but it is not working to stop me using special broad receiver Please thank me first   
 
 
 You should 1. First hold a wakelock; 2. Do something else; 3. Release the wakelock.  
 So you should test it:  
  button b1 = (button) findViewById (R.id.button1); B1.setOnClickListener (New OnClickListener () {@Override Click Public Zero (see ARG0) {wl.acquire ();}}); Button B2 = (button) Find VVBIID (R.B. button2); B2.setOnClickListener (New OnClickListener () {@Override Public Zero Click on (see ARG0) {wl.release ();}});  
  •  Press the press button  
  •  Lock the screen for a test  
  •  Press the button 2   
     What's more: < / P> 
       
    •  PARTIAL_WAKE_LOCK: Ensures that the CPU is running; Screen and keyboard  
    •  FULL_WAKE_LOCK (I think you want): This ensures that the screen and keyboard backlight are full brightness.    

       




  
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