java在DeviceAdmin模式禁用时设置身份验证？

Question

我正在创建一个家长控制应用程序，在那里我想把简单的密码验证前禁用管理员模式使用。我正在使用DeviceAdminReceiver。有帮助的想法或示例代码。谢谢

Answer 1

不幸的是，没有直接的方法来实现它。然而，有一种解决方法可以通过重写DeviceAdminReceiver的onDisableRequested()方法来完成

public class AdminReceiver extends DeviceAdminReceiver {
    @Override
    public CharSequence onDisableRequested(Context context, Intent intent) {
        DevicePolicyManager mDPM =(DevicePolicyManager)getApplicationContext().getSystemService("device_policy");
        mDPM.lockNow();
        // You can also display overlay screen
        return "Are you sure you want to disable the Device admin?";//OR whatever message you would like to display
    }

}

根据文件

Called when the user has asked to disable the administrator, as a result of receiving ACTION_DEVICE_ADMIN_DISABLE_REQUESTED, giving you a chance to present a warning message to them. The message is returned as the result; if null is returned (the default implementation), no message will be displayed.

注意：

如果您试图显示覆盖屏幕，请注意，禁用弹出窗口和停用屏幕将具有高可见性优先级。任何这样做的尝试都不会有多大帮助。解决方法之一是先锁定屏幕，然后显示叠加屏幕