Android鎖屏API-DevicePolicyManager介紹

 從android 2.2開始，加入了一個新的鎖屏API位於android.app.admin.DevicePolicyManager包，DevicePolicyManager類的lockNow方法可以鎖住屏幕，查看android源代碼發現其實是從IDevicePolicyManager實現的，整個AIDL接口調用代碼為:

private final IDevicePolicyManager mService;

mService = IDevicePolicyManager.Stub.asInterface(
ServiceManager.getService(Context.DEVICE_POLICY_SERVICE));

if (mService != null) {
try {
mService.lockNow();
} catch (RemoteException e) {
Log.w(TAG, "Failed talking with device policy service", e);
}
}

這裡Android123提示大家傳統的方法加入<uses-permission android:name="android.permission.DISABLE_KEYGUARD"></uses-permission>權限，使用下面代碼可以鎖住鍵盤，但屏幕不行

KeyguardManager km = (KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE);
KeyguardLock kl= km.newKeyguardLock(KEYGUARD_SERVICE);
kl.reenableKeyguard();