Android屏幕点亮(常亮)及屏幕解锁和锁定

在程序开发时，有时候需要屏幕保持点亮/常亮及解锁状态。比方说，闹钟响起时需要点亮和解锁屏幕或者实现一个一键实现屏幕锁屏（锁定）效果。具体代码如下：

1、Android屏幕常亮/点亮

//保持屏幕常亮
PowerManager pm  =  (PowerManager ) getSystemService ( Context. POWER_SERVICE ) ;
mWakeLock  = pm. newWakeLock (PowerManager. FULL_WAKE_LOCK  | PowerManager. ACQUIRE_CAUSES_WAKEUP, LOCK_TAG ) ;  
mWakeLock. acquire ( ) ;

//释放屏幕常亮锁
if ( null  != mWakeLock )  {
    mWakeLock. release ( ) ;
}

2、Android屏幕解锁和锁定

//屏幕解锁
KeyguardManager keyguardManager  =  (KeyguardManager )getSystemService (KEYGUARD_SERVICE ) ;
KeyguardLock keyguardLock  = keyguardManager. newKeyguardLock (LOCK_TAG ) ;
keyguardLock. disableKeyguard ( ) ;

//屏幕锁定
keyguardLock. reenableKeyguard ( ) ;

3、相关权限

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