Android:设备管理:从服务启动设备管理

Question

我无法获得允许用户授予应用程序成为设备管理员工作权限的 Activity 。

我的代码如下...

ComponentName comp = new ComponentName(this, CustomReceiver.class);

Intent i = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);

i.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, comp);
i.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "Explanation");

startActivity(i);

应用程序没有崩溃/报告异常。我可能做错了什么？

Answer 1

像这样就可以了

if (!mPolicy.isAdminActive()) {

    Intent activateDeviceAdminIntent =
        new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);

    activateDeviceAdminIntent.putExtra(
        DevicePolicyManager.EXTRA_DEVICE_ADMIN,
        mPolicy.getPolicyAdmin());

    // It is good practice to include the optional explanation text to
    // explain to user why the application is requesting to be a device
    // administrator. The system will display this message on the activation
    // screen.
    activateDeviceAdminIntent.putExtra(
        DevicePolicyManager.EXTRA_ADD_EXPLANATION,
        getResources().getString(R.string.device_admin_activation_message));

    startActivityForResult(activateDeviceAdminIntent,
        REQ_ACTIVATE_DEVICE_ADMIN);
}

可能是你没有考虑

mPolicy.getPolicyAdmin()