我在执行中的Andr​​oid REST客户端。 我已经看到了使用服务执行连接到服务器和 ResultReceiver 的实例的被通知操作完成。我打电话从一个片段的服务，如果我尝试旋转屏幕的服务运行时，在getActivity（）方法 ResultReceiver 返回null，原因可能是片段不是在布局了。

I am implementing a REST client in Android. I have seen an example of using a Service to perform the connection to the server and the ResultReceiver to be notified of the operation completion. I am calling the service from a fragment and, if I try to rotate the screen while the service is running, the getActivity() method in ResultReceiver returns null because probably that fragment is not in layout anymore.

在片段中的回调方法：

@Override
public void onReceiveResult(int resultCode, Bundle resultData) {
    Response response = (Response) resultData
            .getSerializable(RestService.RESULT);
    if (resultCode == RestService.SUCCESS
            && response != null) {
        if (getActivity() != null) {
            recommendationResponse = response;
            getLoaderManager().restartLoader(0, new Bundle(),
                    Fragment.this);
        }

    }
}

在 getActivity（）返回null。 这正常吗？我可以用什么方法，让即使是在屏幕旋转通知？本地广播？

The getActivity() returns null. Is this normal? What approach could I use to allow notification even on screen rotation? Local Broadcast?

推荐答案

我使用的是的BroadcastReceiver 使用注册 LocalBroadcastManager 和它工作正常。这不是那么简单。有没有更好的解决办法存在？

I am using a BroadcastReceiver registered using LocalBroadcastManager and it is working properly. It wasn't so simple. Does a better solution exist?