如何在Android中从Service更新activity

Question

我正在学习Android。我做了一个简单的Activity，然后在Activity中启动Service，做一些高网络操作，现在我想当高网络负载调用完成时，然后我想更新到我的Activity。

是否可以从Service更新Activity ?

Answer 1

这是从一个现在已经贬值的名为DataDroid的库中获取和修改的代码，但它与您正在尝试做的事情相关。

private final class RequestReceiver extends ResultReceiver {
    RequestReceiver() {
        super(new Handler(Looper.getMainLooper()));
    }
    @Override
    public void onReceiveResult(int resultCode, Bundle resultData) {
        /*
         * Depending on how you implement this either update activity from here
         * or instantiate it with an interface that your activity implements and 
         * call that here. 
         */
    }
}

创建如下服务:

RequestReceiver requestReceiver = new RequestReceiver();
Intent i = new Intent(mContext, Service);
i.putExtra(RequestService.INTENT_EXTRA_RECEIVER, requestReceiver);
mContext.startService(i);

您也可以使用前面提到的库并修改它以适合您当前的用例，或者使用许多其他可用的类似库之一。