原生JSON解析

JSONObject：JSON数据封装对象
JSONArray：JSON数据封装数组

布局：

 <?xml version="1.0" encoding="utf-8"?>

 <LinearLayout

     android:orientation="vertical"

     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"

     tools:context="net.bwie.jsonobject.MainActivity">

     <Button

         android:id="@+id/read_file_btn"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:text="读取文件中的json数据"/>

     <Button

         android:id="@+id/parse_btn"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:text="解析json数据"/>

     <TextView

         android:id="@+id/result_tv"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:text="Hello World!"/>

 </LinearLayout>

Bean:

 package net.bwie.jsonobject;

 import java.util.List;

 public class ShoppingBean {

     private String msg;

     private InfoBean info;

     public String getMsg() {

         return msg;

     }

     public void setMsg(String msg) {

         this.msg = msg;

     }

     public InfoBean getInfo() {

         return info;

     }

     public void setInfo(InfoBean info) {

         this.info = info;

     }

     @Override

     public String toString() {

         return "ShoppingBean{" +

                 "msg='" + msg + '\'' +

                 ", info=" + info +

                 '}';

     }

     public static class InfoBean {

         private int cat_id;

         private List<GoodsBean> good;

         private boolean url;

         public int getCat_id() {

             return cat_id;

         }

         public void setCat_id(int cat_id) {

             this.cat_id = cat_id;

         }

         public List<GoodsBean> getGood() {

             return good;

         }

         public void setGood(List<GoodsBean> good) {

             this.good = good;

         }

         public boolean isUrl() {

             return url;

         }

         public void setUrl(boolean url) {

             this.url = url;

         }

         @Override

         public String toString() {

             return "InfoBean{" +

                     "cat_id=" + cat_id +

                     ", good=" + good +

                     ", url=" + url +

                     '}';

         }

         public static class GoodsBean {

             private long add_time;

             private String colorcode;

             private String currency_price;

             private String description;

             private String goods_id;

             private String goods_name;

             private String thumb;

             public long getAdd_time() {

                 return add_time;

             }

             public void setAdd_time(long add_time) {

                 this.add_time = add_time;

             }

             public String getColorcode() {

                 return colorcode;

             }

             public void setColorcode(String colorcode) {

                 this.colorcode = colorcode;

             }

             public String getCurrency_price() {

                 return currency_price;

             }

             public void setCurrency_price(String currency_price) {

                 this.currency_price = currency_price;

             }

             public String getDescription() {

                 return description;

             }

             public void setDescription(String description) {

                 this.description = description;

             }

             public String getGoods_id() {

                 return goods_id;

             }

             public void setGoods_id(String goods_id) {

                 this.goods_id = goods_id;

             }

             public String getGoods_name() {

                 return goods_name;

             }

             public void setGoods_name(String goods_name) {

                 this.goods_name = goods_name;

             }

             public String getThumb() {

                 return thumb;

             }

             public void setThumb(String thumb) {

                 this.thumb = thumb;

             }

             @Override

             public String toString() {

                 return "GoodsBean{" +

                         "add_time=" + add_time +

                         ", colorcode='" + colorcode + '\'' +

                         ", currency_price='" + currency_price + '\'' +

                         ", description='" + description + '\'' +

                         ", goods_id='" + goods_id + '\'' +

                         ", goods_name='" + goods_name + '\'' +

                         ", thumb='" + thumb + '\'' +

                         '}';

             }

         }

     }

 }

Activity:

 /**

  * 1、将json文件存在外部存储中，使用IO流读取文件中的数据

  * 2、使用JSONObject解析读取出来的数据

  */

 public class MainActivity extends AppCompatActivity implements View.OnClickListener {

     private String mJson = "";

     protected Button mReadFileBtn;

     protected Button mParseBtn;

     protected TextView mResultTv;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         super.setContentView(R.layout.activity_main);

         initView();

     }

     @Override

     public void onClick(View view) {

         if (view.getId() == R.id.read_file_btn) {

             readFile();

         } else if (view.getId() == R.id.parse_btn) {

             ShoppingBean shopping = parseJson();

             Log.d("1507", "" + shopping);

         }

     }

     // 解析JSON数据

     // 遇到{}就创建JSONObject，遇到[]就创建JSONArray

     private ShoppingBean parseJson() {

         ShoppingBean shopping = null;

         try {

             JSONObject rootObject = new JSONObject(mJson);

          shopping = new ShoppingBean();

             String msg = rootObject.getString("msg");

             shopping.setMsg(msg);

             JSONObject infoObject = rootObject.getJSONObject("info");

             ShoppingBean.InfoBean info = new ShoppingBean.InfoBean();

             shopping.setInfo(info);

             int catId = infoObject.getInt("cat_id");

             info.setCat_id(catId);

             boolean url = infoObject.getBoolean("url");

             info.setUrl(url);

             JSONArray goodsArray = infoObject.getJSONArray("goods");

             List<ShoppingBean.InfoBean.GoodsBean> goodsList = new ArrayList<>();

             info.setGood(goodsList);

             for (int i = 0; i < goodsArray.length(); i++) {

                 JSONObject goodsObject = goodsArray.getJSONObject(i);

                 ShoppingBean.InfoBean.GoodsBean goods = new ShoppingBean.InfoBean.GoodsBean();

                 long addTime = goodsObject.getLong("add_time");

                 goods.setAdd_time(addTime);

                 String colorCode = goodsObject.getString("colorcode");

                 goods.setColorcode(colorCode);

                 String currencyPrice = goodsObject.getString("currency_price");

                 goods.setCurrency_price(currencyPrice);

                 String description = goodsObject.getString("description");

                 goods.setDescription(description);

                 String goodsName = goodsObject.getString("goods_name");

                 goods.setGoods_name(goodsName);

                 String thumb = goodsObject.getString("thumb");

                 goods.setThumb(thumb);

                 goodsList.add(goods);

             }

         } catch (Exception e) {

             e.printStackTrace();

         }

         return shopping;

     }

     // 读取文件中的JSON数据

     private void readFile() {

         // 根目录

         // Environment.getExternalStorageDirectory()

         // 外部存储公共路径，例如：DCIM，DOWNLOADS等系统提供的文件夹

 //        Environment.getExternalStoragePublicDirectory(类型)

         // 外部存储私有路径：Android文件夹

 //        context.getExternalFilesDir(null)

         // downloads文件夹路径

         String filePath = Environment

                 .getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)

                 .getAbsolutePath();

         String fileName = "json.txt";

         File file = new File(filePath, fileName);

         // 文件字符输入流

         // 字缓符输入冲流

         BufferedReader br = null;

         try {

             br = new BufferedReader(new FileReader(file));

             String line = new String();

             while ((line = br.readLine()) != null) {

                 mJson += line;

             }

             if (mJson != null) {

                 mResultTv.setText(mJson);

             }

         } catch (Exception e) {

             e.printStackTrace();

         } finally {

             try {

                 br.close();

             } catch (IOException e) {

                 e.printStackTrace();

             }

         }

     }

     private void initView() {

         mReadFileBtn = (Button) findViewById(R.id.read_file_btn);

         mReadFileBtn.setOnClickListener(MainActivity.this);

         mParseBtn = (Button) findViewById(R.id.parse_btn);

         mParseBtn.setOnClickListener(MainActivity.this);

         mResultTv = (TextView) findViewById(R.id.result_tv);

     }

 }

权限：

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

巴特西

原生JSON解析

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