2

我正在尝试从用户激活设备管理员那里获得响应。如果用户按下激活然后做某事，或者如果用户按下取消，则会弹出一个对话框通知用户应该激活。

我尝试使用

在类DeviceAdmin

public class DeviceAdmin {
    public static final int DEVICE_ADMIN_REQUEST = 9;
    public static final int START_SERVICE = 8;

    private static DevicePolicyManager mDevicePolicyManager;
    private static ComponentName mComponentName;

    public static DevicePolicyManager getDevicePolicyManager() {
        return mDevicePolicyManager;
    }

    public static void setDevicePolicyManager(
            final DevicePolicyManager devicePolicyManager) {
        mDevicePolicyManager = devicePolicyManager;
    }

public static ComponentName getComponentName() {
    return mComponentName;
}

public static void setComponentName(final ComponentName componentName) {
    mComponentName = componentName;
}


    public static void initDPM(final Activity activity) {
        if (mDevicePolicyManager == null) {
            setDevicePolicyManager((DevicePolicyManager) activity
                    .getSystemService(Context.DEVICE_POLICY_SERVICE));
        }
    }

    public static <T> void initComponent(final Activity activity,
            final Class<T> reciever) {
        if (mComponentName == null) {
            setComponentName(new ComponentName(activity, reciever));
        }
    }

    public static boolean isDeviceAdmin() {
        return mDevicePolicyManager.isAdminActive(mComponentName);
    }

    public static void registerDeviceAdmin(final Activity activity,
            final int requestCode) {
        Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
        intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,
                getComponentName());
        activity.startActivityForResult(intent, requestCode);
    }

    public static void unregisterDeviceAdmin() {
        if (mDevicePolicyManager.isAdminActive(mComponentName))
            mDevicePolicyManager.removeActiveAdmin(mComponentName);
    }


}

在MainActivity

public class LockIt extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        init();
        if (!DeviceAdmin.isDeviceAdmin())
            DeviceAdmin.registerDeviceAdmin(this,
                    DeviceAdmin.DEVICE_ADMIN_REQUEST);
        else
            // Do something;
    }

    private void init() {
        DeviceAdmin.initDPM(this);
        DeviceAdmin.initComponent(this, LockItNowAdminReceiver.class);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == DeviceAdmin.DEVICE_ADMIN_REQUEST) {
            if (resultCode == RESULT_OK) {
                // do something;
            } else if (resultCode == RESULT_CANCELED) {
                // showAdminDialog;
            }
        }
    }
}

RESULT_OK为 -1，RESULT_CANCELED为 0

但是当我在调试模式下运行时，我发现无论用户按取消还是激活，resultCode 始终为 0。

更新

好的，我想我找到了原因。我android:launchMode="singleInstance"在MainActivity 清单中使用过

这是获得设备管理员激活响应的正确方法吗？还是我做错了什么？

4

2 回答 2

2

是的，这是真的，但你应该放置一个类的实例 extends DeviceAdminReceiver：

ComponentName mDeviceAdminSample = new ComponentName(v.getContext(), DeviceAdmin.class);

Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mDeviceAdminSample);
activity.startActivityForResult(intent, DEVICE_ADMIN_REQUEST);

并在onAcitivityResult：

if (requestCode == DEVICE_ADMIN_REQUEST}

  if(resultCode == RESULT_OK) {
    // admin
  } else {
   // not admin
  }

}

可以在此处找到完整的示例

只需确保在AndroidManifest.XML.

于 2013-06-22T09:28:32.327 回答
2

最后

我想我找到了原因。

我android:launchMode="singleInstance"在 MainActivity 清单中使用过

现在我用android:taskAffinity. 现在看来一切都好。

于 2013-06-23T07:00:29.187 回答