android-async-http详解手机开发

android-async-http开源项目可以是我们轻松的获取网络数据或者向服务器发送数据，使用起来非常简单，关于android-async-http开源项目的介绍内容来自于官方：http://loopj.com/android-async-http/.下面我对此主页上内容进行大体上的翻译，希望能够对你理解android-async-http开源项目有所帮助

1.1 Overview(概况)

     An asynchronous callback-based Http client for Android built on top of Apache’s HttpClient libraries. All requests are made outside of your app’s main UI thread, but any callback logic will be executed on the same thread as the callback was created using Android’s Handler message passing.

译文：

  异步基于回调的Http客户端为Android构建，是基于Apache HttpClient库的。所有的请求都是位于应用程序主线程 UI 之外,但任何回调逻辑将相同的线程上执行回调,使用Android的处理程序创建消息传递。

1.2 Features(特征)

• Make asynchronous HTTP requests, handle responses in anonymous callbacks
• 进行异步HTTP请求,处理响应在匿名回调中完成
  
• HTTP requests happen outside the UI thread
• HTTP请求发生在UI线程之外
  
• Requests use a threadpool to cap concurrent resource usage
• 请求使用threadpool，限制并发资源使用情况
• GET/POST params builder (RequestParams)
• GET / POST参数构建使用(RequestParams)
• Multipart file uploads with no additional third party libraries
• Multipart 文件上传,没有额外的第三方库
• Tiny size overhead to your application, only 25kb for everything
• 在你的应用程序上利用很小的开销,仅仅25 kb就可以做一切
• Automatic smart request retries optimized for spotty mobile connections
• 自动智能请求重试,优化了质量不一的移动连接
• Automatic gzip response decoding support for super-fast requests
• 自动解码支持gzip反应速度超快的请求
• Binary file (images etc) downloading with BinaryHttpResponseHandler
• 二进制文件(图片等)的下载,使用BinaryHttpResponseHandler
• Built-in response parsing into JSON with JsonHttpResponseHandler
• 内置响应解析成JSON,使用JsonHttpResponseHandler
• Persistent cookie store, saves cookies into your app’s SharedPreferences
• 持久化cookie存储，保存cookie到你的应用程序的SharedPreferences

import com.loopj.android.http.*; 

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

RequestParams params = new RequestParams(); 
params.put("key", "value"); 
params.put("more", "data"); 

RequestParams params = new RequestParams("single", "value"); 

HashMap<String, String> paramMap = new HashMap<String, String>(); 
paramMap.put("key", "value"); 
RequestParams params = new RequestParams(paramMap); 

InputStream myInputStream = blah; 
RequestParams params = new RequestParams(); 
params.put("secret_passwords", myInputStream, "passwords.txt"); 

File myFile = new File("/path/to/file.png"); 
RequestParams params = new RequestParams(); 
try { 
    params.put("profile_picture", myFile); 
} catch(FileNotFoundException e) {} 

byte[] myByteArray = blah; 
RequestParams params = new RequestParams(); 
params.put("soundtrack", new ByteArrayInputStream(myByteArray), "she-wolf.mp3"); 

AsyncHttpClient client = new AsyncHttpClient(); 
String[] allowedContentTypes = new String[] { "image/png", "image/jpeg" }; 
client.get("http://example.com/file.png", new BinaryHttpResponseHandler(allowedContentTypes) { 
    @Override 
    public void onSuccess(byte[] fileData) { 
        // Do something with the file 
    } 
});