Android keeps the screen bright and awake

Step 1: First add permissions:

Step 2: implement the Code as follows:

public class ScreenActivity extends Activity   {        PowerManager powerManager = null;        WakeLock wakeLock = null;        @Override        protected void onCreate(Bundle savedInstanceState) {            super.onCreate(savedInstanceState);            this.setContentView(R.layout.main);            powerManager = (PowerManager)this.getSystemService(this.POWER_SERVICE);            wakeLock = this.powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, "My Lock");       }       @Override       protected void onResume() {           super.onResume();           wakeLock.acquire();       }       @Override       protected void onPause() {           super.onPause();           wakeLock.release();       }   }

Note: calling the WakeLock function at different lifecycles can make the system run normally (if the Activity ends without calling WakeLock. release, the screen will always be on ).