Android：Web请求助手类

Question

我需要良好的课程来发送和处理所有请求，例如get，post
我在任何地方都进行了研究，但是我找不到它的好助手类，我是java和android的初学者，请与我分享一个很好的连接助手类

Answer 1

public class RRequestHelper
{

    DefaultHttpClient httpClient;
    HttpContext localContext;
    private String ret;

    HttpResponse response = null;
    HttpPost httpPost = null;
    HttpGet httpGet = null;

    public RRequestHelper()
    {
       this.setDefaultOptions();
    }

    public void setDefaultOptions()
    {
         HttpParams myParams = new BasicHttpParams();
         HttpConnectionParams.setConnectionTimeout(myParams, RGeneralSettings.getInstance().getSettingInt(RConstants.CONNECTION_TIMEOUT, false));
         HttpConnectionParams.setSoTimeout(myParams, RGeneralSettings.getInstance().getSettingInt(RConstants.CONNECTION_TIMEOUT, false));
         httpClient = new DefaultHttpClient(myParams);       
         localContext = new BasicHttpContext();    
    }
    public void clearCookies() 
    {
        httpClient.getCookieStore().clear();
    }

    public void abort() 
    {
        try 
        {
            if (httpClient != null) 
            {
                System.out.println("Abort.");
                httpPost.abort();
            }
        } 
        catch (Exception e) 
        {
            System.out.println("Your App Name Here" + e);
        }
    }

    public String sendPost(String url, String data) 
    {
        return sendPost(url, data, null);
    }

    public String sendJSONPost(String url, JSONObject data) 
    {
        return sendPost(url, data.toString(), "application/json");
    }

    public String sendPost(String url, String data, String contentType) 
    {
        ret = null;

        httpClient.getParams().setParameter(ClientPNames.COOKIE_POLICY, CookiePolicy.RFC_2109);

        httpPost = new HttpPost(url);
        response = null;

        StringEntity tmp = null;        

        Log.d("Your App Name Here", "Setting httpPost headers");

        httpPost.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0");
        httpPost.setHeader("Accept", "text/html,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5");

        if (contentType != null) 
        {
            httpPost.setHeader("Content-Type", contentType);
        } 
        else 
        {
            httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded");
        }

        try 
        {
            tmp = new StringEntity(data,"UTF-8");
        } 
        catch (UnsupportedEncodingException e) 
        {
            Log.e("Your App Name Here", "HttpUtils : UnsupportedEncodingException : "+e);
        }

        httpPost.setEntity(tmp);

        Log.d("Your App Name Here", url + "?" + data);

        try 
        {
            response = httpClient.execute(httpPost,localContext);

            if (response != null) 
            {
                ret = EntityUtils.toString(response.getEntity());
            }
        } 
        catch (Exception e) 
        {
            Log.e("Your App Name Here", "HttpUtils: " + e);
        }

        Log.d("Your App Name Here", "Returning value:" + ret);

        return ret;
    }

    public String sendGet(String url) {
        httpGet = new HttpGet(url);  

        try {
            response = httpClient.execute(httpGet);  
        } catch (Exception e) {
            Log.e("Your App Name Here", e.getMessage());
        }

        //int status = response.getStatusLine().getStatusCode();  

        // we assume that the response body contains the error message  
        try {
            ret = EntityUtils.toString(response.getEntity());  
        } catch (IOException e) {
            Log.e("Your App Name Here", e.getMessage());
        }

        return ret;
    }

    public InputStream getHttpStream(String urlString) throws IOException 
    {
        InputStream in = null;
        int response = -1;

        URL url = new URL(urlString); 
        URLConnection conn = url.openConnection();

        if (!(conn instanceof HttpURLConnection)) 
        {                   
            throw new IOException("Not an HTTP connection");
        }

        try
        {
            HttpURLConnection httpConn = (HttpURLConnection) conn;
            httpConn.setAllowUserInteraction(false);
            httpConn.setInstanceFollowRedirects(true);
            httpConn.setRequestMethod("GET");
            httpConn.connect(); 

            response = httpConn.getResponseCode();                 

            if (response == HttpURLConnection.HTTP_OK) {
                in = httpConn.getInputStream();                                 
            }                     
        } 
        catch (Exception e) 
        {
            throw new IOException("Error connecting");            
        } // end try-catch

        return in;     
    }
}