如何锁定android编程

Question

我想锁定手机，当我点击锁按钮。任何人请帮助简单code.i尝试使用API​​_Demos部分代码，但它显示一些错误。

Answer 1

程序可以用锁屏类，像这样锁定Android的屏幕：

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

看看锁屏类here。

Answer 2

代码：

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

不会锁定屏幕。它只是启用了键盘锁。当你运行

lock.disableKeyguard(); 

并按下设备上的锁定按钮它不会锁定键盘锁。 要以编程方式锁定屏幕，您必须参考Device Admin并使用locknow（）方法锁定设备。

Answer 3

@Bhupinder请检查以下链接。

http://musicm122.blogspot.in/2011/10/locking-and-unlocking-android-phone.html

//Get the window from the context 

    WindowManager wm = Context.getSystemService(Context.WINDOW_SERVICE); 

    //Unlock 

    //http://developer.android.com/reference/android/app/Activity.html#getWindow() 

    Window window = getWindow(); 

    window.addFlags(wm.LayoutParams.FLAG_DISMISS_KEYGUARD); 



    //Lock device 

    DevicePolicyManager mDPM; 

    mDPM = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);