使用AsyncHttpClient 实现get和post请求

AsyncHttpClient简介：

AsyncHttpClient庫 基於Apache的HttpClient框架,是一個異步的httpClient, 所有的http請求都在子線程中,但是callback執行的線程和創建這個callback的線程是同一個(也即主線程創建的callback那麼執行的時候也是在主線程中)。

实现get和post请求：

[java] view plain copy

1. public class MainActivity extends Activity {  
2.   
3.     private EditText usernameET;  
4.     private EditText passwordET;  
5.     private AsyncHttpClient client;  
6.   
7.     @Override  
8.     protected void onCreate(Bundle savedInstanceState) {  
9.         super.onCreate(savedInstanceState);  
10.         setContentView(R.layout.activity_main);  
11.         usernameET = (EditText) this.findViewById(R.id.UsernamET);  
12.         passwordET = (EditText) this.findViewById(R.id.PaswordET);  
13.         client = new AsyncHttpClient();  
14.     }  
15.     public void get(View v) throws Exception{  
16.           
17.         String username = usernameET.getText().toString().trim();  
18.         String password = passwordET.getText().toString().trim();  
19.         String path = "";  
20.         String params = "username=" + URLEncoder.encode(username, "UTF-8") + "&password="+  URLEncoder.encode(password, "UTF-8");  
21.           
22.         client.get(path+"?"+params, new AsyncHttpResponseHandler() {  
23.             @Override  
24.             public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {  
25.                 // TODO Auto-generated method stub  
26.                 Toast.makeText(getApplicationContext(), "登陆成功", Toast.LENGTH_SHORT)  
27.                 .show();  
28.             }  
29.               
30.             @Override  
31.             public void onFailure(int statusCode, Header[] headers,  
32.                     byte[] responseBody, Throwable error) {  
33.                 // TODO Auto-generated method stub  
34.                 Toast.makeText(getApplicationContext(), "登陆失败", Toast.LENGTH_SHORT)  
35.                 .show();  
36.             }  
37.         });  
38.     }  
39.     public void post(View v){  
40.         String username = usernameET.getText().toString().trim();  
41.         String password = passwordET.getText().toString().trim();  
42.         String path = "";  
43.         RequestParams params  = new RequestParams();  
44.         params.put("username", username);  
45.         params.put("password", password);  
46.         client.post(path, params, new AsyncHttpResponseHandler() {  
47.               
48.             @Override  
49.             public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {  
50.                 // TODO Auto-generated method stub  
51.                 Toast.makeText(getApplicationContext(), "登陆成功", Toast.LENGTH_SHORT)  
52.                 .show();  
53.             }  
54.               
55.             @Override  
56.             public void onFailure(int statusCode, Header[] headers,  
57.                     byte[] responseBody, Throwable error) {  
58.                 // TODO Auto-generated method stub  
59.                 Toast.makeText(getApplicationContext(), "登陆失败", Toast.LENGTH_SHORT)  
60.                 .show();  
61.             }  
62.         });  
63.     }  
64. }  

使用AsyncHttpClient实现网络图片的读取：

[java] view plain copy

1. public void onClick(View v){  
2.           
3.         String path = pathText.getText().toString().trim();  
4.         client.get(path, new AsyncHttpResponseHandler() {  
5.               
6.             @Override  
7.             public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {  
8.                 // TODO Auto-generated method stub  
9.                 Bitmap image = BitmapFactory.decodeByteArray(responseBody, 0, responseBody.length);   
10.                 Image.setImageBitmap(image);  
11.                 Toast.makeText(getApplicationContext(), "获取成功", Toast.LENGTH_SHORT)  
12.                 .show();  
13.             }  
14.               
15.             @Override  
16.             public void onFailure(int statusCode, Header[] headers,  
17.                     byte[] responseBody, Throwable error) {  
18.                 // TODO Auto-generated method stub  
19.                 Toast.makeText(getApplicationContext(), "获取失败", Toast.LENGTH_SHORT)  
20.                 .show();  
21.             }  
22.         });  
23.     }  

当然，这个是最基础的用法了，之后会有关于AsyncHttpClient的上传和下载等用法