Android中的多线程错误:CalledFromErrorThreadException

Android中的多线程错误:CalledFromErrorThreadException,android,multithreading,android-asynctask,httprequest,Android,Multithreading,Android Asynctask,Httprequest,我正在执行一些Http请求,我的logcat中有一个错误: 原因:android.view.ViewRootImpl$CalledFromErrorThreadException:只有创建视图层次结构的原始线程才能接触其视图 这是我的背景代码: public class AsyncClass extends AsyncTask { StringBuilder result = new StringBuilder(); String stream = null; public String res

我正在执行一些Http请求,我的logcat中有一个错误:

原因:android.view.ViewRootImpl$CalledFromErrorThreadException:只有创建视图层次结构的原始线程才能接触其视图

这是我的背景代码:

public class AsyncClass extends AsyncTask {
StringBuilder result = new StringBuilder();
String stream = null;
public String rest_Url = "https://....." ;

@Override
protected Object doInBackground(Object[] params) {
    HttpURLConnection client = null;

    try {
        URL url = new URL(rest_Url);
        client = (HttpURLConnection) url.openConnection();
        client.setRequestMethod("GET");
        client.setDoOutput(true);


        int responseCode = client.getResponseCode();
        switch (responseCode){
            case 200:
                String success = "SUCCESS";
                System.out.println(success);

                InputStream inputPost = new BufferedInputStream(client.getInputStream());
                BufferedReader reader = new BufferedReader(new InputStreamReader(inputPost));
                String line;
                while ((line = reader.readLine()) != null) {
                    result.append(line);
                }
                stream = result.toString();
                MainActivity.textView.setText(stream);
                break;

            default:
                String failure = "FAILURE";
                System.out.println(failure);
                break;
        }


    } catch (IOException e) {
        e.printStackTrace();}

    finally {
        if(client != null){
            client.disconnect();
        }
    }

    return null;
}}
你能帮我吗?
即使我注释
MainActivity.textView.setText(流),我有问题。

问题来自以下行:

MainActivity.textView.setText(stream);
您需要将其封送到主线程。类似问题如下:

MainActivity.textView
?您是否声明了TextView静态?我使用了thx daf btw的
onPostExecute()
方法,而不是封送