使用AsyncHttpClient 实现get和post请求

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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：

public class MainActivity extends Activity {private EditText usernameET;private EditText passwordET;private AsyncHttpClient client;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);usernameET = (EditText) this.findViewById(R.id.UsernamET);passwordET = (EditText) this.findViewById(R.id.PaswordET);client = new AsyncHttpClient();}public void get(View v) throws Exception{String username = usernameET.getText().toString().trim();String password = passwordET.getText().toString().trim();String path = "";String params = "username=" + URLEncoder.encode(username, "UTF-8") + "&password="+  URLEncoder.encode(password, "UTF-8");client.get(path+"?"+params, new AsyncHttpResponseHandler() {@Overridepublic void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "登陆成功", Toast.LENGTH_SHORT).show();}@Overridepublic void onFailure(int statusCode, Header[] headers,byte[] responseBody, Throwable error) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "登陆失败", Toast.LENGTH_SHORT).show();}});}public void post(View v){String username = usernameET.getText().toString().trim();String password = passwordET.getText().toString().trim();String path = "";RequestParams params  = new RequestParams();params.put("username", username);params.put("password", password);client.post(path, params, new AsyncHttpResponseHandler() {@Overridepublic void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "登陆成功", Toast.LENGTH_SHORT).show();}@Overridepublic void onFailure(int statusCode, Header[] headers,byte[] responseBody, Throwable error) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "登陆失败", Toast.LENGTH_SHORT).show();}});}}

使用AsyncHttpClient实现网络图片的读取：

public void onClick(View v){String path = pathText.getText().toString().trim();client.get(path, new AsyncHttpResponseHandler() {@Overridepublic void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {// TODO Auto-generated method stubBitmap image = BitmapFactory.decodeByteArray(responseBody, 0, responseBody.length);Image.setImageBitmap(image);Toast.makeText(getApplicationContext(), "获取成功", Toast.LENGTH_SHORT).show();}@Overridepublic void onFailure(int statusCode, Header[] headers,byte[] responseBody, Throwable error) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "获取失败", Toast.LENGTH_SHORT).show();}});}

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

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