android 获取http请求json数据

Posted 2020-09-21

package com.my.gethttpjsondata;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.json.JSONArray;
import org.json.JSONObject;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

TextView textView;

static String err;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

textView = (TextView) findViewById(R.id.tv_json);

}

public void Click1(View view)
{
//Toast.makeText(MainActivity.this, "开始", 0).show();
//String path="http://192.168.1.151:10080/?module={appId:%22d1%22,id:%22getAllUser%22}";
try {
//textView.setText(getJsonContent(path));
//String r=getJsonContent(path);
//Toast.makeText(MainActivity.this, r, 0).show();
// 开启一个子线程，进行网络操作，等待有返回结果，使用handler通知UI
new Thread(networkTask).start();

/**
List<Map> list=new ArrayList<Map>();
list=getJSONObject(path,MainActivity.this);
for (Map list2 : list) {
String id = list2.get("UserID").toString();
String name = list2.get("UserName").toString();
Toast.makeText(MainActivity.this, "id:" + id + " | name:" + name, 0).show();
}
**/

} catch (Exception e) {
Toast.makeText(MainActivity.this, e.toString(), 0).show();
e.printStackTrace();
}

}

/**
* 网络操作相关的子线程
*/
Runnable networkTask = new Runnable() {

@Override
public void run() {
String path="http://192.168.1.151:10080/?module={appId:%22d1%22,id:%22getAllUser%22}";
List<Map> list=new ArrayList<Map>();
try {
list=getJSONObject(path);
} catch (Exception e) {

e.printStackTrace();
}
for (Map list2 : list) {
String id = list2.get("UserID").toString();
String name = list2.get("UserName").toString();
Log.v("data", "id:" + id + " | name:" + name);
}
}
};

public static List<Map> getJSONObject(String path) throws Exception {
List<Map> list = new ArrayList<Map>();
Map map = null;
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();// 利用HttpURLConnection对象,我们可以从网络中获取网页数据.
conn.setConnectTimeout(5 * 1000); // 单位是毫秒，设置超时时间为5秒
conn.setRequestMethod("GET"); // HttpURLConnection是通过HTTP协议请求path路径的，所以需要设置请求方式,可以不设置，因为默认为GET
//Log.v("abc", "Status:"+conn.getResponseCode());

if (conn.getResponseCode() == 200) {// 判断请求码是否是200码，否则失败
InputStream is = conn.getInputStream(); // 获取输入流
byte[] data = readStream(is); // 把输入流转换成字符数组
String json = new String(data); // 把字符数组转换成字符串


//数据形式：{"total":2,"success":true,"arrayData":[{"id":1,"name":"小猪"},{"id":2,"name":"小猫"}]}
JSONObject jsonObject=new JSONObject(json); //返回的数据形式是一个Object类型，所以可以直接转换成一个Object
//int total=jsonObject.getInt("total");
Boolean success=jsonObject.getBoolean("success");
//Log.i("abc", "total:" + total + " | success:" + success); //测试数据

JSONArray jsonArray = jsonObject.getJSONArray("data");//里面有一个数组数据，可以用getJSONArray获取数组
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject item = jsonArray.getJSONObject(i); // 得到每个对象
int id = item.getInt("UserID"); // 获取对象对应的值
String name = item.getString("UserName");

map = new HashMap(); // 存放到MAP里面
map.put("UserID", id + "");
map.put("UserName", name);
list.add(map);
}
}

// ***********测试数据******************

for (Map list2 : list) {
String id = list2.get("UserID").toString();
String name = list2.get("UserName").toString();
Log.v("data", "id:" + id + " | name:" + name);
}

return list;
}


public static byte[] readStream(InputStream inputStream) throws Exception {
ByteArrayOutputStream bout = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = inputStream.read(buffer)) != -1) {
bout.write(buffer, 0, len);
}
bout.close();
inputStream.close();

return bout.toByteArray();
}



public void Click2(View view)
{
Thread th=new Thread(new Runnable() {

@Override
public void run() {
// TODO Auto-generated method stub
String httpUrl = "http://apis.baidu.com/heweather/weather/free";
String httpArg = "city=beijing";
String jsonResult = request(httpUrl, httpArg);
Log.v("jsonResult",jsonResult);
//Toast.makeText(MainActivity.this, jsonResult, 0).show();
}
});

th.start();

}

/**
* @param urlAll
* :请求接口
* @param httpArg
* :参数
* @return 返回结果
*/
public static String request(String httpUrl, String httpArg) {
BufferedReader reader = null;
String result = null;
StringBuffer sbf = new StringBuffer();
httpUrl = httpUrl + "?" + httpArg;

try {
URL url = new URL(httpUrl);
HttpURLConnection connection = (HttpURLConnection) url
.openConnection();
connection.setRequestMethod("GET");
// 填入apikey到HTTP header
connection.setRequestProperty("apikey", "574cc9baa2b89769d89a6799c194f806");
connection.connect();
InputStream is = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
String strRead = null;
while ((strRead = reader.readLine()) != null) {
sbf.append(strRead);
sbf.append("\\r\\n");
}
reader.close();
result = sbf.toString();
} catch (Exception e) {
Log.v("dituerr", e.toString());
e.printStackTrace();

}
return result;
}

}

 

 

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