Android Studio中的POST请求示例 [英] Example of POST request in Android studio

问题描述

我刚刚开始学习android几天前，我有一个上传我的JSON数据到服务器的问题。我设法通过以下代码来检索它：编辑：我设法使用外部OKHTTP库来检索文件，但是我希望在不使用外部库的情况下执行此操作。

p>

  package cc.demorest; 
 
导入android.os.AsyncTask; 
导入android.renderscript.ScriptGroup; 
导入android.support.v7.app.AppCompatActivity; 
导入android.os.Bundle; 
导入android.util.Log; 
导入android.widget.EditText; 
导入android.widget.TextView; 
 
 import org.json.JSONArray; 
 import org.json.JSONException; 
 import org.json.JSONObject; 
 
 import java.io.IOException; 
 import java.io.InputStream; 
 import java.io.InputStreamReader; 
导入java.net.HttpURLConnection; 
导入java.net.MalformedURLException; 
 import java.net.URL; 
 
公共类MainActivity延伸AppCompatActivity {
 @覆盖
保护无效的onCreate（捆绑savedInstanceState）{
的setContentView（R.layout.activity_main）; 
 
 super.onCreate（savedInstanceState）; 
 setContentView（R.layout.activity_main）; 
 
 DownloadTask task = new DownloadTask（）; 
 task.execute（myserver.com）; 
} 
 //下载任务
 public class DownloadTask extends AsyncTask< String，Void，String> {
 
 
 @Override 
保护字符串doInBackground（字符串...网址）{
 
字符串结果=; 
网址; 
 HttpURLConnection urlConnection = null; 
 
 
尝试{
 url =新网址（网址[0]）; 
 
 urlConnection =（HttpURLConnection）url.openConnection（）; 
 InputStream in = urlConnection.getInputStream（）; 
 
 InputStreamReader reader = new InputStreamReader（in）; 
 
 int data = reader.read（）; 
 
 while（data！=  -  1）{
 
 char current =（char）data; 
 
 result + = current; 
 data = reader.read（）; 
} 
 
返回结果; 
 
 catch（MalformedURLException e）{
 e.printStackTrace（）; 
} catch（IOException e）{
 e.printStackTrace（）; 
} 
 
返回null; 
} 
 //下载任务
 @Override 
后保护无效onPostExecute（字符串结果）{
 super.onPostExecute（result）; 
尝试{
 
 JSONArray jArray = new JSONArray（result）; 
 JSONObject json_data = jArray.getJSONObject（1）; 
 //记录数据
 Log.i（ Podatci：， ID： + json_data.getInt（ ID）+ 
，名称： + json_data.getString（名称 ）+ 
，岁月： + json_data.getString（ 时代 ）+ 
，邮箱地址： + json_data.getString（ 电子邮件）
）; 
 TextView textView =（TextView）findViewById（R.id.textViewName）; 
 textView.setText（ ID： +，名称： + json_data.getInt（ ID）+ json_data.getString（ 名称）+ json_data.getString（ 时代）+ json_data.getString（ 电子邮件））; 
 
 
 
 
 / * 
 String data = jsonObject.getString（Name）; 
 Log.i（网站内容，数据）; 
 * / 
} catch（JSONException e）{
 e.printStackTrace（）; 
} 
 
} 
} 
 
 
 
} 
  

我现在试图将数据发送到具有相同字段的相同服务器。我搜索了互联网，但我发现的大多数东西都过时了。我会真正appriciate一些帮助或例子。
最好的问候

解决方案

使用Volley定义这里。这更容易。

I just started learning android few days ago and I have a problem with uploading my JSON data to server. I manage to retrieve it via following code:

Edit: I did manage to retrieve files using external OKHTTP library but I would like to do this without using external libraries.

package cc.demorest;

import android.os.AsyncTask;
import android.renderscript.ScriptGroup;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.EditText;
import android.widget.TextView;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setContentView(R.layout.activity_main);

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        DownloadTask task = new DownloadTask();
        task.execute("myserver.com");
    }
//Downloadtask
    public class DownloadTask extends AsyncTask<String,Void,String> {


        @Override
        protected String doInBackground(String... urls) {

            String result = "";
                URL url;
            HttpURLConnection urlConnection=null;


            try {
                url = new URL(urls[0]);

                urlConnection=(HttpURLConnection)url.openConnection();
                InputStream in = urlConnection.getInputStream();

                InputStreamReader reader = new InputStreamReader(in);

                int data=reader.read();

                while (data !=-1){

                    char current=(char) data;

                    result += current;
                    data = reader.read();
                }

                return result;

            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

            return null;
        }
//After download task
        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
        try {

            JSONArray jArray=new JSONArray(result);
                JSONObject json_data = jArray.getJSONObject(1);
//Logging data
               Log.i("Podatci: ", "Id: " + json_data.getInt("Id") +
                                ", Name: " + json_data.getString("Name") +
                                ", Years: " + json_data.getString("Age") +
                                ", Email address: " + json_data.getString("Email")
                );
                TextView textView = (TextView) findViewById(R.id.textViewName);
                textView.setText("ID: "+", Name: "+  json_data.getInt("Id")+json_data.getString("Name")+json_data.getString("Age")+json_data.getString("Email"));




/*
        String data = jsonObject.getString("Name");
            Log.i("Website content", data);
*/
        } catch (JSONException e) {
            e.printStackTrace();
        }

        }
    }



}

I am now trying to send my data to same server with same fields. I searched internet but most things that I found are outdated.. I would really appriciate some help or example. Best Regards

解决方案

Use Volley as defined here. It's far more easier.

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