GSOn作用：
把需要解析的数据（字符串）转换成对象或把对象转换为 字符串
使用JSONView工具：
把需要解析的数据放在assets目录下：
image.png
image.png
image.png
xml:
···
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.gson.MainActivity">
<Button
android:id="@+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Gson解析" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView"
android:textSize="20sp" />
</LinearLayout>
</ScrollView>
</LinearLayout>
···
------------------------------------代码---------------
···
package com.example.wangye.zknewstest;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.google.gson.Gson;
import org.json.JSONArray;
import org.json.JSONObject;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.List;
public class MainActivity extends AppCompatActivity {
Button btNative, btGson;
TextView tx;
String json = "";
String content = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
public void init(){
try {
InputStream is = getAssets().open("zk_new_json.txt");
ByteArrayOutputStream bs = new ByteArrayOutputStream();
byte buffer[] = new byte[512];
int length = -1;
while( ( length = is.read(buffer)) != -1){
bs.write(buffer,0,length);
bs.flush();
}
is.close();
bs.close();
json = bs.toString();
} catch (Exception e) {
e.printStackTrace();
}
btNative = (Button) findViewById(R.id.button);
btNative.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
parseJsonByNative(json);
}
});
btGson = (Button) findViewById(R.id.button2);
btGson.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
parseJsonByGson(json);
}
});
tx = (TextView) findViewById(R.id.textView);
}
public void parseJsonByNative(String json){
try {
JSONObject jsonObject = new JSONObject(json);
JSONObject data = jsonObject.getJSONObject("data");
JSONArray course = data.getJSONArray("course");
for (int i = 0; i < course.length(); i++) {
JSONObject courseObject = course.getJSONObject(i);
JSONArray courseDetail = courseObject.getJSONArray("courseDetail");
String professional = courseDetail.getJSONObject(0).getString("professional");
content += "专业："+professional+"\n";
String university = courseDetail.getJSONObject(1).getString("university");
content += "大学："+university+"\n";
String brief = courseDetail.getJSONObject(2).getString("brief");
content += "专业介绍："+brief+"\n";
String region = courseDetail.getJSONObject(3).getString("region");
content += "地区："+region+"\n";
String require = courseDetail.getJSONObject(4).getString("require");
content += "要求："+require+"\n";
String frequency = courseDetail.getJSONObject(5).getString("frequency");
content += "考试周期："+frequency+"\n";
String subject = courseDetail.getJSONObject(6).getString("subject");
content += "考试科目："+subject+"\n";
JSONArray exams = courseDetail.getJSONObject(7).getJSONArray("exams");
for (int j = 0; j < exams.length(); j++) {
JSONObject examsObject = exams.getJSONObject(j);
JSONArray examDetail = examsObject.getJSONArray("examDetail");
String examTimeYear = examDetail.getJSONObject(0).getString("examTimeYear");
content += "考试年份："+examTimeYear+"\n";
String examTimeMonth = examDetail.getJSONObject(1).getString("examTimeMonth");
content += "考试月份："+examTimeMonth+"\n";
String signUpTime = examDetail.getJSONObject(2).getString("signUpTime");
content += "报名时间："+signUpTime+"\n";
String examScore = examDetail.getJSONObject(4).getString("examScore");
if(examScore.equals("null")){
content += "公布成绩："+"待定"+"\n";
}else{
content += "公布成绩："+examScore+"\n";
}
JSONArray examDay = examDetail.getJSONObject(3).getJSONArray("examDay");
for (int k = 0; k < examDay.length(); k++) {
JSONObject examDayObject = examDay.getJSONObject(k);
JSONArray day = examDayObject.getJSONArray("day");
String timeDay = day.getJSONObject(0).getString("timeDay");
content += "考试日期："+timeDay+"\n";
JSONArray timeUp = day.getJSONObject(1).getJSONArray("timeUp");
String timeUpString="";
if(timeUp.length() == 1){
timeUpString = "暂无考试安排";
}
if(timeUp.length() == 2){
timeUpString = "考试时间："+timeUp.getString(0)+"\n考试科目："+timeUp.getString(1);
}
if(timeUp.length() == 3){
timeUpString = "考试时间："+timeUp.getString(0)
+"\n考试科目1："+timeUp.getString(1)
+"\n考试科目2："+timeUp.getString(2);
}
content += timeUpString+"\n";
JSONArray timeDown = day.getJSONObject(2).getJSONArray("timeDown");
String timeDownString="";
if(timeDown.length() == 1){
timeDownString = "暂无考试安排";
}
if(timeDown.length() == 2){
timeDownString = "考试时间："+timeDown.getString(0)+"\n考试科目："+timeDown.getString(1);
}
if(timeDown.length() == 3){
timeDownString = "考试时间："+timeDown.getString(0)
+"\n考试科目1："+timeDown.getString(1)
+"\n考试科目2："+timeDown.getString(2);
}
content += timeDownString+"\n";
}
}
}
tx.setText("解析到的数据为:\n"+content);
} catch (Exception e) {
e.printStackTrace();
}
}
public void parseJsonByGson(String json){
String data = "";
Gson gson = new Gson();
News news = gson.fromJson(json,News.class);
List<News.DataBean.CourseBean> courseBean = news.getData().getCourse();
for (int i = 0; i < courseBean.size(); i++) {
List<News.DataBean.CourseBean.CourseDetailBean> courseDetailBean =
courseBean.get(i).getCourseDetail();
data += "专业："+courseDetailBean.get(0).getProfessional()+"\n";
data += "大学："+courseDetailBean.get(1).getUniversity()+"\n";
data += "专业介绍："+courseDetailBean.get(2).getBrief()+"\n";
data += "地区："+courseDetailBean.get(3).getRegion()+"\n";
data += "要求："+courseDetailBean.get(4).getRequire()+"\n";
data += "考试周期："+courseDetailBean.get(5).getFrequency()+"\n";
data += "考试科目："+courseDetailBean.get(6).getSubject()+"\n";
List<News.DataBean.CourseBean.CourseDetailBean.ExamsBean> examsBean =
courseDetailBean.get(7).getExams();
for (int j = 0; j < examsBean.size(); j++) {
List<News.DataBean.CourseBean.CourseDetailBean.ExamsBean.ExamDetailBean> examDetailBean =
examsBean.get(j).getExamDetail();
data += "考试年份："+examDetailBean.get(0).getExamTimeYear()+"\n";
data += "考试月份："+examDetailBean.get(1).getExamTimeMonth()+"\n";
data += "登记时间："+examDetailBean.get(2).getSignUpTime()+"\n";
data += "公布成绩："+examDetailBean.get(4).getExamScore()+"\n";
List<News.DataBean.CourseBean.CourseDetailBean.ExamsBean.ExamDetailBean.ExamDayBean> examDayBean =
examDetailBean.get(3).getExamDay();
for (int k = 0; k < examDayBean.size(); k++) {
List<News.DataBean.CourseBean.CourseDetailBean.ExamsBean.ExamDetailBean.ExamDayBean.DayBean> dayBean =
examDayBean.get(k).getDay();
data += "考试日期："+dayBean.get(0).getTimeDay()+"\n";
List<String> timeUp = dayBean.get(1).getTimeUp();
if(timeUp.size() == 1){
data += "上午暂无考试安排";
}
if(timeUp.size() == 2){
data += "考试时间："+timeUp.get(0)+"\n考试科目："+timeUp.get(1);
}
if(timeUp.size() == 3){
data += "考试时间："+timeUp.get(0)+"\n考试科目1："+timeUp.get(1)+"\n考试科目2："+timeUp.get(2);
}
List<String> timeDown = dayBean.get(2).getTimeDown();
if(timeDown.size() == 1){
data += "上午暂无考试安排";
}
if(timeDown.size() == 2){
data += "考试时间："+timeDown.get(0)+"\n考试科目："+timeDown.get(1);
}
if(timeDown.size() == 3){
data += "考试时间："+timeDown.get(0)+
"\n考试科目1："+timeDown.get(1)+
"\n考试科目2："+timeDown.get(2);
}
}
}
}
tx.setText("Gson解析：\n"+data);
}
}
···
