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                            1、Android屏幕常亮/点亮 代码如下: 
//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();  
代码如下: 
//释放屏幕常亮锁 
if(null != mWakeLock) { 
    mWakeLock.release(); 
}  
2、Android屏幕解锁和锁定 代码如下: 
//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 代码如下: 
uses-permission android:name="android.permission.DISABLE_KEYGUARD" / 
uses-permission android:name="android.permission.WAKE_LOCK" /