标签:span rect 数据 create finally directory rmi tools package
原生JSON解析
JSONObject:JSON数据封装对象
JSONArray:JSON数据封装数组
布局:
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout 3 android:orientation="vertical" 4 xmlns:android="http://schemas.android.com/apk/res/android" 5 xmlns:app="http://schemas.android.com/apk/res-auto" 6 xmlns:tools="http://schemas.android.com/tools" 7 android:layout_width="match_parent" 8 android:layout_height="match_parent" 9 tools:context="net.bwie.jsonobject.MainActivity"> 10 11 <Button 12 android:id="@+id/read_file_btn" 13 android:layout_width="wrap_content" 14 android:layout_height="wrap_content" 15 android:text="读取文件中的json数据"/> 16 17 <Button 18 android:id="@+id/parse_btn" 19 android:layout_width="wrap_content" 20 android:layout_height="wrap_content" 21 android:text="解析json数据"/> 22 23 <TextView 24 android:id="@+id/result_tv" 25 android:layout_width="wrap_content" 26 android:layout_height="wrap_content" 27 android:text="Hello World!"/> 28 29 </LinearLayout>
Bean:
1 package net.bwie.jsonobject; 2 3 import java.util.List; 4 5 public class ShoppingBean { 6 7 private String msg; 8 private InfoBean info; 9 10 public String getMsg() { 11 return msg; 12 } 13 14 public void setMsg(String msg) { 15 this.msg = msg; 16 } 17 18 public InfoBean getInfo() { 19 return info; 20 } 21 22 public void setInfo(InfoBean info) { 23 this.info = info; 24 } 25 26 @Override 27 public String toString() { 28 return "ShoppingBean{" + 29 "msg=‘" + msg + ‘\‘‘ + 30 ", info=" + info + 31 ‘}‘; 32 } 33 34 public static class InfoBean { 35 36 private int cat_id; 37 private List<GoodsBean> good; 38 private boolean url; 39 40 public int getCat_id() { 41 return cat_id; 42 } 43 44 public void setCat_id(int cat_id) { 45 this.cat_id = cat_id; 46 } 47 48 public List<GoodsBean> getGood() { 49 return good; 50 } 51 52 public void setGood(List<GoodsBean> good) { 53 this.good = good; 54 } 55 56 public boolean isUrl() { 57 return url; 58 } 59 60 public void setUrl(boolean url) { 61 this.url = url; 62 } 63 64 @Override 65 public String toString() { 66 return "InfoBean{" + 67 "cat_id=" + cat_id + 68 ", good=" + good + 69 ", url=" + url + 70 ‘}‘; 71 } 72 73 public static class GoodsBean { 74 75 private long add_time; 76 private String colorcode; 77 private String currency_price; 78 private String description; 79 private String goods_id; 80 private String goods_name; 81 private String thumb; 82 83 public long getAdd_time() { 84 return add_time; 85 } 86 87 public void setAdd_time(long add_time) { 88 this.add_time = add_time; 89 } 90 91 public String getColorcode() { 92 return colorcode; 93 } 94 95 public void setColorcode(String colorcode) { 96 this.colorcode = colorcode; 97 } 98 99 public String getCurrency_price() { 100 return currency_price; 101 } 102 103 public void setCurrency_price(String currency_price) { 104 this.currency_price = currency_price; 105 } 106 107 public String getDescription() { 108 return description; 109 } 110 111 public void setDescription(String description) { 112 this.description = description; 113 } 114 115 public String getGoods_id() { 116 return goods_id; 117 } 118 119 public void setGoods_id(String goods_id) { 120 this.goods_id = goods_id; 121 } 122 123 public String getGoods_name() { 124 return goods_name; 125 } 126 127 public void setGoods_name(String goods_name) { 128 this.goods_name = goods_name; 129 } 130 131 public String getThumb() { 132 return thumb; 133 } 134 135 public void setThumb(String thumb) { 136 this.thumb = thumb; 137 } 138 139 @Override 140 public String toString() { 141 return "GoodsBean{" + 142 "add_time=" + add_time + 143 ", colorcode=‘" + colorcode + ‘\‘‘ + 144 ", currency_price=‘" + currency_price + ‘\‘‘ + 145 ", description=‘" + description + ‘\‘‘ + 146 ", goods_id=‘" + goods_id + ‘\‘‘ + 147 ", goods_name=‘" + goods_name + ‘\‘‘ + 148 ", thumb=‘" + thumb + ‘\‘‘ + 149 ‘}‘; 150 } 151 } 152 153 } 154 155 }
Activity:
1 /** 2 * 1、将json文件存在外部存储中,使用IO流读取文件中的数据 3 * 2、使用JSONObject解析读取出来的数据 4 */ 5 public class MainActivity extends AppCompatActivity implements View.OnClickListener { 6 7 private String mJson = ""; 8 9 protected Button mReadFileBtn; 10 protected Button mParseBtn; 11 protected TextView mResultTv; 12 13 @Override 14 protected void onCreate(Bundle savedInstanceState) { 15 super.onCreate(savedInstanceState); 16 super.setContentView(R.layout.activity_main); 17 initView(); 18 } 19 20 @Override 21 public void onClick(View view) { 22 if (view.getId() == R.id.read_file_btn) { 23 readFile(); 24 } else if (view.getId() == R.id.parse_btn) { 25 ShoppingBean shopping = parseJson(); 26 Log.d("1507", "" + shopping); 27 } 28 } 29 30 // 解析JSON数据 31 // 遇到{}就创建JSONObject,遇到[]就创建JSONArray 32 private ShoppingBean parseJson() { 33 ShoppingBean shopping = null; 34 try { 35 JSONObject rootObject = new JSONObject(mJson); 36 shopping = new ShoppingBean(); 37 38 String msg = rootObject.getString("msg"); 39 shopping.setMsg(msg); 40 41 JSONObject infoObject = rootObject.getJSONObject("info"); 42 ShoppingBean.InfoBean info = new ShoppingBean.InfoBean(); 43 shopping.setInfo(info); 44 45 int catId = infoObject.getInt("cat_id"); 46 info.setCat_id(catId); 47 48 boolean url = infoObject.getBoolean("url"); 49 info.setUrl(url); 50 51 JSONArray goodsArray = infoObject.getJSONArray("goods"); 52 List<ShoppingBean.InfoBean.GoodsBean> goodsList = new ArrayList<>(); 53 info.setGood(goodsList); 54 55 for (int i = 0; i < goodsArray.length(); i++) { 56 JSONObject goodsObject = goodsArray.getJSONObject(i); 57 ShoppingBean.InfoBean.GoodsBean goods = new ShoppingBean.InfoBean.GoodsBean(); 58 59 long addTime = goodsObject.getLong("add_time"); 60 goods.setAdd_time(addTime); 61 62 String colorCode = goodsObject.getString("colorcode"); 63 goods.setColorcode(colorCode); 64 65 String currencyPrice = goodsObject.getString("currency_price"); 66 goods.setCurrency_price(currencyPrice); 67 68 String description = goodsObject.getString("description"); 69 goods.setDescription(description); 70 71 String goodsName = goodsObject.getString("goods_name"); 72 goods.setGoods_name(goodsName); 73 74 String thumb = goodsObject.getString("thumb"); 75 goods.setThumb(thumb); 76 77 goodsList.add(goods); 78 } 79 80 } catch (Exception e) { 81 e.printStackTrace(); 82 } 83 84 return shopping; 85 86 } 87 88 // 读取文件中的JSON数据 89 private void readFile() { 90 // 根目录 91 // Environment.getExternalStorageDirectory() 92 93 // 外部存储公共路径,例如:DCIM,DOWNLOADS等系统提供的文件夹 94 // Environment.getExternalStoragePublicDirectory(类型) 95 96 // 外部存储私有路径:Android文件夹 97 // context.getExternalFilesDir(null) 98 99 // downloads文件夹路径 100 String filePath = Environment 101 .getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) 102 .getAbsolutePath(); 103 String fileName = "json.txt"; 104 105 File file = new File(filePath, fileName); 106 107 // 文件字符输入流 108 // 字缓符输入冲流 109 BufferedReader br = null; 110 try { 111 br = new BufferedReader(new FileReader(file)); 112 String line = new String(); 113 while ((line = br.readLine()) != null) { 114 mJson += line; 115 } 116 if (mJson != null) { 117 mResultTv.setText(mJson); 118 } 119 } catch (Exception e) { 120 e.printStackTrace(); 121 } finally { 122 try { 123 br.close(); 124 } catch (IOException e) { 125 e.printStackTrace(); 126 } 127 } 128 } 129 130 private void initView() { 131 mReadFileBtn = (Button) findViewById(R.id.read_file_btn); 132 mReadFileBtn.setOnClickListener(MainActivity.this); 133 mParseBtn = (Button) findViewById(R.id.parse_btn); 134 mParseBtn.setOnClickListener(MainActivity.this); 135 mResultTv = (TextView) findViewById(R.id.result_tv); 136 } 137 }
权限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
标签:span rect 数据 create finally directory rmi tools package
原文地址:http://www.cnblogs.com/SongYongQian/p/7883286.html