Question

使用isValid.execute(address)调用以下内容，然后调用isValid.get()来获取响应。但是，它会挂起，它返回的所有内容都是布尔值（true或false），

我用来调用代码的位是：

IsValid isValid = new IsValid();
try {
    isValid.execute(addr);
    success = isValid.get();
}
catch (Exception e) {
    success = false;
}
return success;

IsValid 类

public class IsValid extends AsyncTask<String, Void, Boolean> {

    @Override
    protected Boolean doInBackground(String... params) {
        Boolean success = false;

        try {
            SocketAddress sockaddr = new InetSocketAddress(params[0], 80);

            // Create an unbound socket
            Socket sock = new Socket();

            // This method will block no more than timeoutMs.
            // If the timeout occurs, SocketTimeoutException is thrown.
            int timeoutMs = 2000; // 2 seconds

            Logit(TAG,"" + sockaddr.toString());
            sock.connect(sockaddr, timeoutMs);
            success = true;
        }
        catch (Exception exc) {
            success = false;
        }
        return success;
    }

    @Override
    protected Boolean onPostExceute(Boolean result) {
        Logit(TAG,"IN POST, RESULT IS = "+result);
        return result;
    }
}

Answer 1

如果你看过这篇文章： How do I retrieve the data from AsyncTasks doInBackground()?

看起来你有类似的情况。您正在启动异步任务，然后等待结果，这没有任何意义。

相反，您应该设置一个回调，并使用它来获得结果

AsyncTask获取挂起

1 个答案: