Android—(获取并解析xml和Json)
16lz
2021-01-24
思维导图：
Android的网络编程中去拿服务器的数据，一般只采用两种方式。XML和Json，所以今天我们简单做一个案列示范，
其他复杂的都离不开这最基础的步骤。
效果图：
布局：
输出结果：
xml解析
json解析
第一步：我们需要xml文件和JSON文件(源文件放在服务器上面)（实际项目开发中我们是动态生成的）
①student.xml
<?xml version="1.0" encoding="UTF-8"?> 码农01 101 码农02 102 码农03 103 ②students.json
{"count":3,"students":[{"sid":1,"sname":"小小","ssex":"女"},{"sid":2,"sname":"小码","ssex":"男"},{"sid":3,"sname":"小农","ssex":"男"}]}第二步: 写好布局文件
<?xml version="1.0" encoding="utf-8"?> 第三步：核心处理类
注意：
1、手机获取服务端数据需要在AndroidManifest.xml配上权限
BigObject.java
package com.example.android31_xmlorjson;import java.util.List;/** * Created by Administrator on 2017/7/26 0026. */public class BigObject { private int count; private List students; public BigObject() { } public BigObject(int count, List students) { this.count = count; this.students = students; } public void setCount(int count) { this.count = count; } public void setStudents(List students) { this.students = students; } public int getCount() { return count; } public List getStudents() { return students; }} package com.example.android31_xmlorjson;/** * Created by Administrator on 2017/7/26 0026. */public class Student { private int sid; private String sname; private String ssex; public Student() { } public Student(int sid, String sname, String sex) { this.sid = sid; this.sname = sname; this.ssex = ssex; } public void setSid(int sid) { this.sid = sid; } public void setSname(String sname) { this.sname = sname; } public void setSsex(String ssex) { this.ssex = ssex; } public int getSid() { return sid; } public String getSname() { return sname; } public String getSsex() { return ssex; }}3.JSON解析我使用的是阿里巴巴研发的解析
下载地址：http://download.csdn.net/detail/a985548426/9913248
核心处理：
package com.example.android31_xmlorjson;import android.os.AsyncTask;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.util.Xml;import android.view.View;import com.alibaba.fastjson.JSON;import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.util.List;public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void getNetXml(View view){ new MyXmlTask().execute(); } //异步获取网络xml class MyXmlTask extends AsyncTask{ @Override protected Object doInBackground(Object[] objects) { //获取网络数据 String path="http://192.168.43.210:8080/student.xml"; try { URL url=new URL(path); HttpURLConnection connection= (HttpURLConnection) url.openConnection(); //设置请求方式（一般提交数据使用POST，获取数据使用GET） connection.setRequestMethod("GET"); //设置请求时间 connection.setConnectTimeout(5000); //获取结果码 int code=connection.getResponseCode(); if(200==code){ InputStream is=connection.getInputStream();//获取读流 //打印自己的结果 // int len=0;// byte[] buf=new byte[1024]; //StringBuffer stringBuffer=new StringBuffer();// while((len=is.read(buf))!=-1){// String s=new String(buf,0,len);// stringBuffer.append(s);// } //Log.i("test",stringBuffer.toString()); //解析XML （我们使用Android特有的pull解析） //实例化解析器 XmlPullParser pullParser= Xml.newPullParser(); //进行解析 (参数一：数据源（网络流）；参数二：编码方式) pullParser.setInput(is,"UTF-8"); //解析标签类型 int type=pullParser.getEventType(); while(type!=XmlPullParser.END_DOCUMENT){ //判断不是结束标签 switch (type){ case XmlPullParser.START_TAG: //获取开始标签的名字 String starTagName=pullParser.getName(); if("student".equals(starTagName)){ //获取属性值id的值 String sid=pullParser.getAttributeName(0); Log.i("test",""+sid); } else if("sname".equals(starTagName)){ String sname=pullParser.nextText(); Log.i("test",""+sname); } else if("sage".equals(starTagName)){ String sage=pullParser.nextText(); Log.i("test",""+sage); } break; case XmlPullParser.END_TAG: break; } //细节 type=pullParser.next(); } //关闭流 is.close(); } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (XmlPullParserException e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(Object o) { super.onPostExecute(o); } } public void getNetJSON(View view){ new MyJsonTask().execute(); } //异步获取网络Json class MyJsonTask extends AsyncTask{ @Override protected Object doInBackground(Object[] objects) { //获取网络Json String path="http://192.168.43.210:8080/students.json"; try { URL url=new URL(path); HttpURLConnection connection= (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.setConnectTimeout(5000); if(connection.getResponseCode()==200){ InputStream is=connection.getInputStream(); int len=0; byte[] buf= new byte[1024]; StringBuffer sb=new StringBuffer(); while ((len=is.read(buf))!=-1){ String s=new String(buf,0,len); sb.append(s); } //输出打印 Log.i("test",sb.toString()); //解析JSON' BigObject bigObject=JSON.parseObject(sb.toString(),BigObject.class); int count=bigObject.getCount(); Log.i("test",count+""); List stuList=bigObject.getStudents(); for (Student sss : stuList) { Log.i("test",sss.getSname()+" "+sss.getSsex()); } } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(Object o) { super.onPostExecute(o); } }} 更多相关文章
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