我们在android项目开发的时候，经常要对JSON进行解析，很多朋友在寻找相关的实例，小编整理详细的相关分析说明，一起来看下。

JSONObject：JSON数据封装对象

JSONArray：JSON数据封装数组

<?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"/>

如果上面说的还有不明白的，大家可以在下方留言讨论。