我是新来的机器人。我其实是一个实习生在一个创业公司工作，所以我通过自己学习的东西。我的团队领导人刚刚问我写一个应用程序从Android应用程序调用REST API。他让我从阅读下面的图片（底部）的状态值并显示它的价值在一个新的活动。其实，我不知道我应该做的。到目前为止，我只学会基本的东西之类的活动之间传递值。请建议我一个很好的教程，或者给我一个想法开始。

I'm new to android. I'm actually a trainee working in a startup company, so I've to learn things by myself. My team leader has just asked me to write an app to call a REST API from an android app. He asked me to read the status value from the picture below(at the bottom) and show its value in a new activity. I actually have no idea what I'm supposed to do. So far I've learned only basic things like passing values between activities. Please suggest me a good tutorial, or give me an idea to start with.

在这里输入图片说明

推荐答案

请使用异步HTTP库。

Please use asynch http library.

下面的链接将解释每一件事情一步一步来。

below link will explain every thing step by step.

http://loopj.com/android-async-http/

下面是示例应用程序：

http://www.techrepublic.com/blog/software-engineer/calling-restful-services-from-your-android-app/

http://blog.strikeiron.com/bid/73189/Integrate-a-REST-API-into-Android-Application-in-less-than-15-minutes

创建一个类：

public class HttpUtils {
 private static final String BASE_URL = "http://api.twitter.com/1/";



  private static AsyncHttpClient client = new AsyncHttpClient();

  public static void get(String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {
      client.get(getAbsoluteUrl(url), params, responseHandler);
  }

  public static void post(String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {
      client.post(getAbsoluteUrl(url), params, responseHandler);
  }


  public static void getByUrl(String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {
      client.get(url, params, responseHandler);
  }

  public static void postByUrl(String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {
      client.post(url, params, responseHandler);
  }

  private static String getAbsoluteUrl(String relativeUrl) {
      return BASE_URL + relativeUrl;
  }

}

调用方法：

    RequestParams rp = new RequestParams();
         rp.add("username", "aaa"); rp.add("password", "aaa@123");



        HttpUtils.post(AppConstant.URL_FEED, rp, new JsonHttpResponseHandler() {
            @Override
            public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
                // If the response is JSONObject instead of expected JSONArray
                Log.d("asd", "---------------- this is response : " + response);
                try {

                    JSONObject serverResp = new JSONObject(response.toString());


                } catch (JSONException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

            }

            @Override
            public void onSuccess(int statusCode, Header[] headers, JSONArray timeline) {
                // Pull out the first event on the public timeline


            }
        });
    }

请在你的manifest文件给网络的权限。

Please give internet permission in your manifest file.

 <uses-permission android:name="android.permission.INTERNET" />