response=httpClient.execute(request) 一直给出 NetworkOnMainThreadException

response=httpClient.execute(request) keeps giving NetworkOnMainThreadException

几个小时以来,我一直在尝试向 php 发送 POST 请求,后者发回 json 响应。但是那一行代码一直给我带来问题,我似乎无法前进。我很沮丧。我已经查阅了无数其他人使用同一条线的例子!但出于某种原因,它对我不起作用! 这是我的 doinBackgrounds 代码片段:

protected Void doInBackground(Void... voids) {
    HttpClient httpClient=new DefaultHttpClient();
    HttpGet request=new HttpGet();
    BufferedReader in=null;
    String data=null;
    HttpResponse response = null;
    try {
        URI website=new URI("login.php");
        request.setURI(website);
    } catch (URISyntaxException e) {
        e.printStackTrace();
    }

    HttpPost httpPost=new HttpPost("login.php");
    List<NameValuePair> nameValuePairs=new ArrayList<NameValuePair>(2);
    nameValuePairs.add(new BasicNameValuePair("name", name));
    nameValuePairs.add(new BasicNameValuePair("password", pwd));
    try {
        httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    try {
        response=httpClient.execute(request);
    } catch (IOException e) {
        e.printStackTrace();
    }
    try {
        in=new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
    } catch (IOException e) {
        e.printStackTrace();
    }
    try {
        String line=in.readLine();
        System.out.println(line);
    } catch (IOException e) {
        e.printStackTrace();
    }

    if (Utility.isNotNull(name) && Utility.isNotNull(pwd)) {
        RequestParams params = new RequestParams();
        if (Utility.validate(name, pwd)) {
            params.put("username", name);
            params.put("password", pwd);
            bloggedIn=true;
            onPostExecute();
        } else {
            loginActivity.InvalidToast();
        }
    } else {
        loginActivity.EmptyToast();
    }
    return null;
}

您正在给 doInBackground() 打电话。这不是您使用 AsyncTask 的方式。要执行 AsyncTask,请创建一个实例并对其调用 execute()executeOnExecutor()。这将导致 doInBackground() 在后台线程上变为 运行。

您可以在 the JavaDocs 中阅读有关 AsyncTask 的更多信息。

(顺便说一句,以后请 post 堆栈跟踪作为从 LogCat 复制的文本,而不是屏幕截图)