您可以设置 DeviceAdminReceiver 将被通知失败的密码尝试，以及作为一个成功的密码尝试失败的尝试之后发生的。这会在 Android的设备管理API的文档。

You can set up a DeviceAdminReceiver that will be notified about failed password attempts, as well as a successful password attempt that occurred after a failed attempt. This is covered in the documentation of Android's device administration APIs.

请注意，用户必须同意让您的应用程序作为一个设备管理员，通过设置应用程序之前，你会得到这些事件。

Note that the user will have to agree to allow your app to serve as a device administrator, via the Settings app, before you will get these events.

此示例项目演示监听这些事件，再加上设置了密码质量政策。关键的部分是：

This sample project demonstrates listening for those events, plus setting up a password quality policy. The key pieces are:

• the DeviceAdminReceiver 实施
• the设备管理元数据，说明什么是管理能力，你的应用程序要
• 接收器在the清单
• code在the活动来检测，如果你的应用程序被批准作为设备管理员，如果没有，导致用户在设置现场进行改变

• the DeviceAdminReceiver implementation
• the device admin metadata, stating what administrative capabilities your app wants
• the receiver's entry in the manifest
• code in the activity to detect if your app is approved to serve as a device administrator and, if not, lead the user to the spot in Settings to make that change