Android 如何用HttpClient 以Post方式提交数据并添加http头信息

如何 post json格式的数据，并附加http头，接受返回数据，请看下面的代码：

private void HttpPostData() {
try {
	HttpClient httpclient = new DefaultHttpClient();
	String uri = "http://www.yourweb.com";
	HttpPost httppost = new HttpPost(uri); 
	//添加http头信息
	httppost.addHeader("Authorization", "your token"); //认证token
	httppost.addHeader("Content-Type", "application/json");
	httppost.addHeader("User-Agent", "imgfornote");
	//http post的json数据格式：  {"name": "your name","parentId": "id_of_parent"}
	JSONObject obj = new JSONObject();
	obj.put("name", "your name");
	obj.put("parentId", "your parentid");
	httppost.setEntity(new StringEntity(obj.toString()));	
	HttpResponse response;
	response = httpclient.execute(httppost);
	//检验状态码，如果成功接收数据
	int code = response.getStatusLine().getStatusCode();
	if (code == 200) { 
		String rev = EntityUtils.toString(response.getEntity());//返回json格式： {"id": "27JpL~j4vsL0LX00E00005","version": "abc"}		
		obj = new JSONObject(rev);
		String id = obj.getString("id");
		String version = obj.getString("version");
	}
	} catch (ClientProtocolException e) {	
	} catch (IOException e) {	
	} catch (Exception e) {	
	}
}

主要用到的类有：org.apache.http.client.HttpClient 、org.apache.http.client.methods.HttpPost 和 org.json.JSONObject

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