android 解析网络数据（JSON）

解析json数据，获取你需要的信息

首先在manifest中添加允许访问网络的权限信息

<uses-permission android:name="android.permission.INTERNET"/>

Main

package com.chuanxidemo.shaoxin.demo08;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

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

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

/**
 * Created by shaoxin on 2017/2/25.
 */

public class Main extends AppCompatActivity {
    private TextView txt;
    private Button btn2;
    private BufferedReader bufferedReader;
    private StringBuffer stringBuffer;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        stringBuffer = new StringBuffer();
        txt = (TextView) findViewById(R.id.txt);
        btn2 = (Button) findViewById(R.id.btn2);
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new Thread(){
                    @Override
                    public void run() {//使用线程的目的是防止该过程在主线程中运行
                        super.run();
                        getData();
                        parseJsonData(getData());
                    }
                }.start();

                //解析

            }
        });
    }


    private void parseJsonData (String string){
        //try{jsonp9+?((.+?))}catch(e){}
        try {
            //解析的过程就是在逐层剥开代码的过程
            JSONObject jsonObject = new JSONObject(string);//每一层都是一个Object对象
            Log.v("msg",jsonObject.get("try").toString());
            Log.i("msg", "parseJsonData: "+jsonObject.getString("timestamp"));
            jsonObject.getJSONObject("data");
            JSONArray jsonArray =  jsonObject.getJSONArray("tvQipuId");//对象中的数组
            Log.i("msg", "parseJsonData: "+jsonArray.get(0).toString());
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

    private String getData() {
        try {
            URL url = new URL("http://cache.video.iqiyi.com/jp/avlist/202861101/1/?callback=jsonp9");//json地址
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");//使用get方法接收
            InputStream inputStream = connection.getInputStream();//得到一个输入流
            bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "UTf-8"));
            String sread = null;
            while ((sread = bufferedReader.readLine()) != null) {
                stringBuffer.append(sread);
                stringBuffer.append("
");
            }
//            Log.i("msg", "onClick: " + stringBuffer.toString());
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return stringBuffer.toString();
    }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/btn2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="获取数据" />
</LinearLayout>