android http协议可以上传对象吗

android http协议可以上传对象吗

网上介绍Android上http通信的文章很多，不过大部分只给出了实现代码的片段，一些注意事项和如何设计一个合理的类用来处理所有的http请求以及返回结果，一般都不会提及。因此，自己对此做了些总结，给出了我的一个解决方案。首先，需要明确一下http通信流程，Android目前提供两种http通信方式，HttpURLConnection和HttpClient，HttpURLConnection多用于发送或接收流式数据，因此比较适合上传/下载文件，HttpClient相对来讲更大更全能，但是速度相对也要慢一点。在此只介绍HttpClient的通信流程：1work;import java.ConnectivityManager;import android.os.Handler;import android.util.Log;public class PostRequest implements Runnable { private static final int NO_SERVER_ERROR=1000; //服务器地址 public static final String URL = "fill your own url"; //一些请求类型 public final static String ADD = "/add"; public final static String UPDATE = "/update"; public final static String PING = "/ping"; //一些参数 private static int connectionTimeout = 60000; private static int socketTimeout = 60000; //类静态变量 private static HttpClient httpClient=new DefaultHttpClient(); private static ExecutorService executorService=Executors.newCachedThreadPool(); private static Handler handler = new Handler(); //变量 private String strResult; private HttpPost httpPost; private HttpResponse httpResponse; private OnReceiveDataListener onReceiveDataListener; private int statusCode; public PostRequest() { strResult = null; httpResponse = null; httpPost = new HttpPost(); } public void setOnReceiveDataListener(OnReceiveDataListener listener) { onReceiveDataListener = listener; } public void iniRequest(String requestType, JSONObject jsonObject) { httpPost.addHeader("Content-Type", "text/json"); httpPost.addHeader("charset", "UTF-8"); httpPost.addHeader("Cache-Control", "no-cache"); HttpParams httpParameters = httpPost.getParams(); HttpConnectionParams.setConnectionTimeout(httpParameters, connectionTimeout); HttpConnectionParams.setSoTimeout(httpParameters, socketTimeout); httpPost.setParams(httpParameters); try { httpPost.setURI(new URI(URL + requestType)); httpPost.setEntity(new StringEntity(jsonObject.toString(), HTTP.UTF_8)); } catch (URISyntaxException e1) { e1.printStackTrace(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } } public void execute() { executorService.execute(this); } public static boolean checkNetState(Activity activity) { ConnectivityManager connManager = (ConnectivityManager) activity .getSystemService(Context.CONNECTIVITY_SERVICE); if (connManager.getActiveNetworkInfo() != null) { return connManager.getActiveNetworkInfo().isAvailable(); } return false; } @Override public void run() { httpResponse = null; try { httpResponse = httpClient.execute(httpPost); strResult = EntityUtils.toString(httpResponse.getEntity()); } catch (ClientProtocolException e1) { strResult = null; e1.printStackTrace(); } catch (IOException e1) { strResult = null; e1.printStackTrace(); } finally { if (httpResponse != null) { statusCode = httpResponse.getStatusLine().getStatusCode(); } else { statusCode=NO_SERVER_ERROR; } if(onReceiveDataListener!=null) { //将注册的监听器的onReceiveData方法加入到消息队列中去执行 handler.post(new Runnable() { @Override public void run() { onReceiveDataListener.onReceiveData(strResult, statusCode); } }); } } } public interface OnReceiveDataListener { public abstract void onReceiveData(String strResult,int StatusCode); }}代码使用了观察者模式，任何需要接收http请求结果的类，都要实现OnReceiveDataListener接口的抽象方法，同时PostRequest实例调用setOnReceiveDataListener方法，注册该监听器。完整调用步骤如下：1.创建PostRequest对象，实现onReceiveData接口，编写自己的onReceiveData方法2.注册监听器3.调用PostRequest的iniRequest方法，初始化本次request4.调用PostRequest的execute方法可能的改进：1.如果需要多个观察者，可以把只能注册单个监听器改为可以注册多个监听器，维护一个监听器List。2.如果需求比较简单，并希望调用流程更简洁，iniRequest和execute可以合并