ResultReceiver 不支持屏幕旋转 [英] ResultReceiver doesn't survire to screen rotation

问题描述

我正在 Android 中实现 REST 客户端.我看过一个例子，它使用 Service 来执行与服务器的连接，并使用 ResultReceiver 来通知操作完成.我正在从片段调用服务，如果我尝试在服务运行时旋转屏幕，ResultReceiver 中的 getActivity() 方法将返回 null，因为该片段可能不再处于布局中.

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.

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);
        }

    }
}

getActivity() 返回 null.这是正常的吗?即使在屏幕旋转时，我也可以使用什么方法来允许通知?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

我正在使用使用 LocalBroadcastManager 注册的 BroadcastReceiver 并且它工作正常.事情没那么简单.是否存在更好的解决方案?

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

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