Xamarin -在电话解锁事件中检测正确或错误的pin

Question

我刚来Xamarin。我希望当用户尝试登录他的电话(设备级别，而不是应用程序)时，能够检测到错误/正确的密码。我尝试过DeviceAdminReceiver类，但它没有触发OnPasswordFailed/OnPasswordSucceeded方法。请参考下面的代码：

接收器

[BroadcastReceiver(Enabled = true)]
    [Android.Runtime.Register("android/app/admin/DeviceAdminReceiver", DoNotGenerateAcw = true)]
    public class LoginWatcher : BroadcastReceiver
    {
        public override void OnReceive(Context context, Intent intent)
        {
            Toast.MakeText(context, "OnReceive",
            ToastLength.Long).Show();
        }

        public void OnDisabled(Context context, Intent intent)
        {
            Toast.MakeText(context, "OnDisabled",
            ToastLength.Long).Show();
        }


        public void OnEnabled(Context context, Intent intent)
        {
            Toast.MakeText(context, "OnEnabled",
            ToastLength.Long).Show();
        }

        public void OnPasswordChanged(Context context, Intent intent)
        {
            Toast.MakeText(context, "OnPasswordChanged",
            ToastLength.Long).Show(); 
        }

        public void OnPasswordExpiring(Context context, Intent intent)
        { 
            Toast.MakeText(context, "OnPasswordExpiring",
            ToastLength.Long).Show(); 
        }

        public void OnPasswordFailed(Context context, Intent intent)
        {
            Toast.MakeText(context, "OnPasswordFailed", ToastLength.Long).Show();
        }


        public void OnPasswordSucceeded(Context context, Intent intent)
        {
            Toast.MakeText(context, "OnPasswordSucceeded", ToastLength.Long).Show();
        }
    }

清单

<receiver android:name=".LoginWatcher" android:label="@string/sample_device_admin" android:description="@string/sample_device_admin_description" android:permission="android.permission.BIND_DEVICE_ADMIN">
        <meta-data android:name="android.app.device_admin" android:resource="@drawable/device_policies" />
        <intent-filter>
            <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
            <action android:name="android.app.action.DEVICE_ADMIN_DISABLE_REQUESTED" />
            <action android:name="android.app.action.DEVICE_ADMIN_DISABLED" />
            <action android:name="android.app.action.ACTION_PASSWORD_CHANGED" />
            <action android:name="android.app.action.ACTION_PASSWORD_EXPIRING" />
            <action android:name="android.app.action.ACTION_PASSWORD_FAILED" />
            <action android:name="android.app.action.ACTION_PASSWORD_SUCCEEDED" />
        </intent-filter>
    </receiver>

    <uses-permission android:name="android.permission.BIND_DEVICE_ADMIN" />

政策

<?xml version="1.0" encoding="UTF-8"?>
<device-admin xmlns:android="http://schemas.android.com/apk/res/android">
  <uses-policies>
    <limit-password />
    <watch-login />
    <reset-password />
    <force-lock />
    <wipe-data />
    <expire-password />
    <encrypted-storage />
    <disable-camera />
    <disable-keyguard-features />
  </uses-policies>
</device-admin>

Answer 1

您可以设置一个DeviceAdminReceiver，以便在密码尝试失败以及尝试失败后密码尝试成功时收到通知。documentation of Android's device administration APIs中介绍了这一点。

请注意，在您获得这些事件之前，用户必须同意允许您的应用程序通过设置应用程序作为设备管理员。This sample project演示了如何侦听这些事件，以及如何设置密码质量策略。

下面是您可以查看的相同线程：Xamarin MonoAndroid DeviceAdmin