Android-async-http
工具类:
import com.loopj.android.http.AsyncHttpClient; import com.loopj.android.http.AsyncHttpResponseHandler; import com.loopj.android.http.BinaryHttpResponseHandler; import com.loopj.android.http.JsonHttpResponseHandler; import com.loopj.android.http.RequestParams; public class HttpUtil { private static AsyncHttpClient client =new AsyncHttpClient(); //实例话对象 static { client.setTimeout(11000); //设置链接超时，如果不设置，默认为10s } //不带参数 用一个完整url获取一个string对象 public static void get(String urlString,AsyncHttpResponseHandler res) { client.get(urlString, res); } //带参数 获取返回字符串 public static void get(String urlString,RequestParams params,AsyncHttpResponseHandler res) // { client.get(urlString, params,res); } // 不带参数，获取json对象或者数组 public static void get(String urlString,JsonHttpResponseHandler res) // { client.get(urlString, res); } //带参数，获取json对象或者数组 public static void get(String urlString,RequestParams params,JsonHttpResponseHandler res) { client.get(urlString, params,res); } // 下载数据使用，会返回byte数据 public static void get(String uString, BinaryHttpResponseHandler bHandler) // { client.get(uString, bHandler); } // public static AsyncHttpClient getClient() { return client; } }
利用以上工具的实例( get 请求 ):
// 不带参数 ,返回String (GET) public void method1(View view) { pDialog = ProgressDialog.show(this, "请稍等", "数据加载中"); //一个菜谱的url地址 String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?type=1&p=2&size=10"; // HttpUtil.get(urlString, new AsyncHttpResponseHandler() { public void onSuccess(String arg0) { // 获取数据成功会调用这里 pDialog.dismiss(); //关闭 textView.setText("获取json数据成功，看下面"); textView2.setText(arg0); Log.i("hck", arg0); }; public void onFailure(Throwable arg0) { // 失败，调用 Toast.makeText(MainActivity.this, "onFailure", Toast.LENGTH_LONG).show(); }; public void onFinish() { // 完成后调用，失败，成功，都要掉 }; }); } // 带参数 返回的是JSONArray， public void method2(View view) { String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?"; RequestParams params = new RequestParams(); // 绑定参数 params.put("type", "1"); params.put("p", "2"); params.put("size", "10"); HttpUtil.get(urlString, params, new JsonHttpResponseHandler() { public void onSuccess(JSONArray arg0) { // 成功后返回一个JSONArray数据 Log.i("hck", arg0.length() + ""); try { textView.setText("菜谱名字：" + arg0.getJSONObject(2).getString("name")); //返回的是JSONArray， 获取JSONArray数据里面的第2个JSONObject对象，然后获取名字为name的数据值 } catch (Exception e) { Log.e("hck", e.toString()); } }; public void onFailure(Throwable arg0) { Log.e("hck", " onFailure" + arg0.toString()); }; public void onFinish() { Log.i("hck", "onFinish"); }; public void onSuccess(JSONObject arg0) { //返回的是JSONObject，会调用这里 Log.i("hck", "onSuccess "); try { textView.setText("菜谱名字：" + arg0.getJSONArray("list").getJSONObject(0) .getString("name")); } catch (Exception e) { Log.e("hck", e.toString()); } }; }); } // 不带参数 返回的是JSONObject， public void method3(View view) { String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?type=1&p=2&size=10"; HttpUtil.get(urlString, new JsonHttpResponseHandler() { public void onSuccess(JSONObject arg0) { try { textView.setText("菜谱名字：" + arg0.getJSONArray("list").getJSONObject(1) .getString("name")); } catch (Exception e) { Log.e("hck", e.toString()); } }; }); } // 带参数 , 返回String public void method4(View view) { String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?"; final RequestParams params = new RequestParams(); params.put("type", "1"); params.put("p", "2"); params.put("size", "10"); HttpUtil.get(urlString, params, new AsyncHttpResponseHandler() { public void onSuccess(String arg0) { try { JSONObject jObject = new JSONObject(arg0); textView.setText("菜谱名字：" + jObject.getJSONArray("list").getJSONObject(2) .getString("name")); Log.i("hck", params.getEntity().toString()); } catch (Exception e) { } }; }); } // 不带参数 下载图片 保存sd卡 public void method5(View view) { String url = "http://f.hiphotos.baidu.com/album/w%3D2048/sign=38c43ff7902397ddd6799f046dbab3b7/9c16fdfaaf51f3dee973bf7495eef01f3b2979d8.jpg"; HttpUtil.get(url, new BinaryHttpResponseHandler() { @Override public void onSuccess(byte[] arg0) { super.onSuccess(arg0); File file = Environment.getExternalStorageDirectory(); File file2 = new File(file, "cat"); file2.mkdir(); file2 = new File(file2, "cat.jpg"); try { FileOutputStream oStream = new FileOutputStream(file2); oStream.write(arg0); //byte[] (arg0) 写入到 file2 oStream.flush(); oStream.close(); textView.setText("可爱的猫咪已经保存在sdcard里面"); } catch (Exception e) { e.printStackTrace(); Log.i("hck", e.toString()); } } }); }
其他:
// 有参数 post 上传文件 public void uploadClick(View view){ String path="http://10.0.2.2:8080/jsontest/servlet/UploadServlet"; File myFile = new File("/sdcard/cat/cat.jpg"); RequestParams params = new RequestParams(); try { params.put("filename", myFile); AsyncHttpClient client = new AsyncHttpClient(); client.post(path, params, new AsyncHttpResponseHandler(){ @Override public void onSuccess(int statusCode, String content) { // TODO Auto-generated method stub super.onSuccess(statusCode, content); Toast.makeText(MainActivity.this, "上传成功！", Toast.LENGTH_LONG).show(); } }); } catch(FileNotFoundException e) { } } // 有参数 post 上传图片 String path="http://sv1.livechano.com:8080/upload.action?&action=1.6&type=1&ext=png"; File myFile = new File("/sdcard/test.png"); RequestParams params = new RequestParams(); try { //注意了，这种方法上传的参数一定要 设置params.put("image", myFile,"application/octet-stream");否则就会失败 params.put("image", myFile,"application/octet-stream"); AsyncHttpClient client = new AsyncHttpClient(); client.post(path, params, new AsyncHttpResponseHandler(){ @Override public void onFailure(Throwable error, String content) { // TODO Auto-generated method stub super.onFailure(error, content); Toast.makeText(MainActivity.this, "上传失败！"+content, Toast.LENGTH_LONG).show(); } @Override public void onSuccess(int statusCode, String content) { // TODO Auto-generated method stub super.onSuccess(statusCode, content); System.out .println("content: "+content); Toast.makeText(MainActivity.this, "上传成功！"+content, Toast.LENGTH_LONG).show(); } }); } catch(FileNotFoundException e) { } // 带json参数的 post请求 try { AsyncHttpClient client = new AsyncHttpClient(); JSONObject jsonObject = new JSONObject(); jsonObject.put("username", "ryantang"); StringEntity stringEntity = new StringEntity(jsonObject.toString()); client.post(MainActivity.this, "http://api.com/login", stringEntity, "application/json", new JsonHttpResponseHandler(){ @Override public void onSuccess(JSONObject jsonObject) { super.onSuccess(jsonObject); } }); } catch (JSONException e) { e.printStackTrace(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); }
附录:官方建议使用一个静态的AsyncHttpClient，像下面的这样
public class TwitterRestClient { 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); } private static String getAbsoluteUrl(String relativeUrl) { return BASE_URL + relativeUrl; } }
