Java Android工作HttpRequest类

我正在寻找一个可用的

HtttpRequest

类，这样我就可以这样做：

String response = Request.get("http://google.com");

我已经写了一个类，但它在安卓3+上不起作用，但在2.3上起作用

public class WebRequest {
public String get(String url){
    HttpClient httpclient = new DefaultHttpClient();
    try {
        HttpGet httpget = new HttpGet(url);

        // Create a response handler
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        String responseBody = httpclient.execute(httpget, responseHandler);


        return responseBody;
    } catch (ClientProtocolException e) {
        e.printStackTrace();
        return null;
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    } finally {
        // When HttpClient instance is no longer needed,
        // shut down the connection manager to ensure
        // immediate deallocation of all system resources
        httpclient.getConnectionManager().shutdown();
    }

公共类WebRequest{
公共字符串获取（字符串url）{
HttpClient HttpClient=新的DefaultHttpClient（）；
试一试{
HttpGet HttpGet=新的HttpGet（url）；
//创建一个响应处理程序
ResponseHandler ResponseHandler=新BasicResponseHandler（）；
字符串responseBody=httpclient.execute（httpget，responseHandler）；
返回响应体；
}捕获（客户端协议例外e）{
e、 printStackTrace（）；
返回null；
}捕获（IOE异常）{
e、 printStackTrace（）；
返回null；
}最后{
//当不再需要HttpClient实例时，
//关闭连接管理器以确保
//立即释放所有系统资源
httpclient.getConnectionManager（）.shutdown（）；
}

}

---

请帮忙！！！

你可以看看这个答案：

在那里，他们使用以下两种方法：

public static void connect(String url) 
{

    HttpClient httpclient = new DefaultHttpClient();

    // Prepare a request object
    HttpGet httpget = new HttpGet(url); 

    // Execute the request
    HttpResponse response;
    try {
        response = httpclient.execute(httpget);
        // Examine the response status
        Log.i("Praeda",response.getStatusLine().toString());

        // Get hold of the response entity
        HttpEntity entity = response.getEntity();
        // If the response does not enclose an entity, there is no need
        // to worry about connection release

        if (entity != null) {

            // A Simple JSON Response Read
            InputStream instream = entity.getContent();
            String result= convertStreamToString(instream);
            // now you have the string representation of the HTML request
            instream.close();
        }


    } catch (Exception e) {}
}

private static String convertStreamToString(InputStream is)
{

    /*
     * To convert the InputStream to String we use the BufferedReader.readLine()
     * method. We iterate until the BufferedReader return null which means
     * there's no more data to read. Each line will appended to a StringBuilder
     * and returned as String.
     */
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    StringBuilder sb = new StringBuilder();

    String line = null;
    try {
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            is.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return sb.toString();
}

更新

使用异步任务：

更新2-简单版本

---

它是否在2.3中工作？如果是，请检查错误是否为strictmode策略如果是，请将其转移到异步任务它可能与编码有关，请尝试向其传递utf-8编码的URL。请显示不工作的代码。URL是utf-8编码的。它在2.3中工作。您能将其转移到异步任务吗？我不知道如何才能重新执行此操作直接返回响应…我认为您必须在Android 3+上使用AsyncTask。也许这就是您要寻找的@user1849921？是的，但我如何直接返回响应，以便在开始执行的地方继续执行？就像回答中提到的：

YourClassExtendingJSONTask任务=新建YourClassExtendingJSONTask（）；task.execute（url）；

这意味着您必须创建另一个类（例如：YourClassExtendingJSONTask.class）并扩展JSONTask类。此外，您必须在YourClassExtendingJSONTask.class中实现自己的

customMethod（JSONObject json）

方法。是的，但我需要作为字符串的响应

    public class XmlTask extends AsyncTask<String, Void, String>{

    public String doInBackground(String... urls){
        String url = urls[0];

        HttpClient httpclient = new DefaultHttpClient();

        // Prepare a request object
        HttpGet httpget = new HttpGet(url); 

        // Execute the request
        HttpResponse response;
        try {
            response = httpclient.execute(httpget);
            // Examine the response status
            Log.i("Praeda",response.getStatusLine().toString());

            // Get hold of the response entity
            HttpEntity entity = response.getEntity();
            // If the response does not enclose an entity, there is no need
            // to worry about connection release

            if (entity != null) {

                // A Simple JSON Response Read
                InputStream instream = entity.getContent();
                String result= convertStreamToString(instream);
                // now you have the string representation of the HTML request
                instream.close();
            }

                return xml;
            }
    }

    public void onPostExecute(String xml){
        // Your XML parsing statement here
    }
}

String result = new XmlTask().execute("http://google.com");