Android传数据到服务器端

在之前的博客中提到主线程中不能操作耗时的操作，例如网络操作。

今天使用实例来使用AsnycTask。

 public Robot query(Robot rqRobot) {

    Gson gson=new Gson();
    String url= MyData.URL+"RobotServlet";
    HttpClient client=new DefaultHttpClient();
    HttpPost post=new HttpPost(url);
    List<NameValuePair> rqParmeter=new ArrayList<>();
    rqParmeter.add(new BasicNameValuePair("input",gson.toJson(rqRobot)));
    try {
        post.setEntity(new UrlEncodedFormEntity(rqParmeter, HTTP.UTF_8));

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }

    Robot rpRobot=null;
    Log.e("niinin","----------------------------");

    try {
        HttpResponse httpResponse=client.execute(post);
        int statusCode=  httpResponse.getStatusLine().getStatusCode();

        Log.e("dsdsd",statusCode+"");
        if (statusCode==200){
            HttpEntity httpEntity= httpResponse.getEntity();
            Log.e("niinin",httpResponse.getEntity().toString());
          rpRobot=gson.fromJson(EntityUtils.toString(httpEntity),Robot.class);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }

    return rpRobot;
}

执行client上传数据，接收到的就是返回值：
HttpResponse response = client.execute(post);

得到返回值：response.getEntity()

但是得到的返回值不是字符串，要先把他转为字符串：

使用EntityUtils的方法来转化为字符串

EntityUtils.toString(response.getEntity());

 // setting request parameters
    List<NameValuePair> requestParameters = new ArrayList<>();
    // send imageSize parameter to server for recognition
    requestParameters.add(new BasicNameValuePair("action", "findById"));
    requestParameters.add(new BasicNameValuePair("imageSize", "400"));
    requestParameters.add(new BasicNameValuePair("id", Integer
            .toString(spotId)));

    try {
//要将list转化为转化为Entity，可以调用UrlEncodedFormEntity方法转化
        post.setEntity(new UrlEncodedFormEntity(requestParameters,
                HTTP.UTF_8));

http://zszdevelop.github.io/2015/05/27/2015-5-27/