Asynchronous Http Client for Android

An asynchronous callback-based Http client for Android built on top of Apache's HttpClient libraries.

Features

• Make asynchronous HTTP requests, handle responses in callbacks
• HTTP requests do not happen in the android UI thread
• Requests use a threadpool to cap concurrent resource usage
• Retry requests to help with bad connectivity
• GET/POST params builder (RequestParams)
• Optional built-in response parsing into JSON (JsonHttpResponseHandler)
• Optional persistent cookie store, saves cookies into your app's SharedPreferences

Basic Example

import com.loopj.android.http.*;

public class ExampleUsage {
    public static void makeRequest() {
        AsyncHttpClient client = new AsyncHttpClient("My User Agent");

        client.get("http://www.google.com", new AsyncHttpResponseHandler() {
            @Override
            public void onSuccess(String response) {
                System.out.println(response);
            }
        });
    }
}

How to Build a Basic Twitter Rest Client

// Build a static wrapper library around AsyncHttpClient
import com.loopj.android.http.*;

public class TwitterRestClient {
    private static final String USER_AGENT = "Example Twitter Rest Client";
    private static final String BASE_URL = "http://api.twitter.com/1/";

    private static AsyncHttpClient client = new AsyncHttpClient(USER_AGENT);

    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.get(getAbsoluteUrl(url), params, responseHandler);
    }

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

// Use the TwitterRestClient in your app
import org.json.*;
import com.loopj.android.http.*;

class TwitterRestClientUsage {
    public void getPublicTimeline() {
        TwitterRestClient.get("statuses/public_timeline.json", null, new JsonHttpResponseHandler() {
            @Override
            public void onSuccess(Object response) {
                JSONArray timeline = (JSONArray)response;

                try {
                    JSONObject firstEvent = timeline.get(0);
                    String tweetText = firstEvent.getString("text");

                    // Do something with the response
                    System.out.println(tweetText);
                } catch(JSONException e) {
                    e.printStackTrace();
                }
            }
        });
    }
}