可能重复：   锁定Android设备编程

我如何以编程方式锁定屏幕在Android中？

How can I programmatically lock the screen in Android?

推荐答案

检查这个类：com.android.internal.policy.impl.LockScreen

从这里引用：http://stackoverflow.com/questions/3219950/can-you-lock-screen-from-your-app

另外，请检查code启用和禁用锁屏Android中。 （从here)

Also check code for enabling and disabling lock Screen in Android. (Referenced from here)

KeyguardManager keyguardManager = (KeyguardManager)getSystemService(Activity.KEYGUARD_SERVICE); 
KeyguardLock lock = keyguardManager.newKeyguardLock(KEYGUARD_SERVICE); 

对于锁定屏幕的使用，

lock.reenableKeyguard();

和禁用锁使用，

lock.disableKeyguard()