首页 > 代码库 > json数据解析，并实现将网络json数据获取用listview显示
json数据解析，并实现将网络json数据获取用listview显示
需要使用jar包
fastjson或gson这两个jar包。
//Gson的使用方式 Gson gson=new Gson(); String str=ReadAssetsFile.readtext(this,"json_ss");//this当前类，"json_ss"需要解析的文件名 UserMessage userMessage=gson.fromJson(str,UserMessage.class);//需要解析的json文件最外层类名//fastjson的使用方法 String json=ReadAssetsFile.readtxt(this,"json_h"); UserMessage user = JSON.parseObject(json,UserMessage.class);
以一个例子来演示：
网络数据源：
{"resultCode":1,"resultInfo":"SUCCESS","info":{"pageInfo":{"total":28,"pageSize":10,"lastPageNumber":3,"nowPage":1,"currNum":10},"merchantKey":[{"merchantID":"5327","name":"瑞庭竹岛酒店","coupon":"网上预定入住可享返现优惠","location":"四川省成都市高新区老成仁路8号","distance":"203m","picUrl":"http://www.warmtel.com/igme_pic/fe3e79c1f349474b98f06477bbdc009f.jpg","couponType":"YES","cardType":"NO","groupType":"NO","gpsX":104.079935,"gpsY":30.54066,"goodSayNum":0,"midSayNum":0,"badSayNum":0},{"merchantID":"2845","name":"目咖啡软件园C6店","coupon":"凭QQ美食享咖啡8折优惠","location":"四川省成都市高新区天华二路219号天府软件园C区6号楼1楼","distance":"479m","picUrl":"http://www.warmtel.com/igme_pic/33f7ab6e385143f097527d4507cabcbe.jpg","couponType":"YES","cardType":"NO","groupType":"NO","gpsX":104.078242,"gpsY":30.545434,"goodSayNum":0,"midSayNum":0,"badSayNum":0},{"merchantID":"5326","name":"九点国际酒店","coupon":"网上预定成功入住可返现金","location":"四川省成都市天府大道南段1号齐盛艺境[近世纪城会展中心]","distance":"556m","picUrl":"http://www.warmtel.com/igme_pic/c5721d159e63482b8a1d4dd9f70f9a03.jpg","couponType":"YES","cardType":"NO","groupType":"NO","gpsX":104.077416,"gpsY":30.53835,"goodSayNum":1,"midSayNum":0,"badSayNum":0},{"merchantID":"2841","name":"布衣客栈软件园店","coupon":"酒店消费券预订酒店返现金","location":"四川省成都市高新区世纪城南路399号[近天府软件园C区]","distance":"660m","picUrl":"http://www.warmtel.com/igme_pic/f8dc2d69a7b742eba4408bb72e510f5d.jpg","couponType":"YES","cardType":"YES","groupType":"NO","gpsX":104.080515,"gpsY":30.547937,"goodSayNum":0,"midSayNum":0,"badSayNum":0},{"merchantID":"11798","name":"茅台贵州液专卖店","coupon":"购买茅台红酒3件以上再送1件","location":"四川省成都市高新区中和镇姐儿堰路14号","distance":"683m","picUrl":"http://www.warmtel.com/igme_pic/df0a55009cea4b8ba2773278ffb3ff79.jpg","couponType":"NO","cardType":"NO","groupType":"NO","gpsX":104.079227,"gpsY":30.536175,"goodSayNum":0,"midSayNum":0,"badSayNum":0},{"merchantID":"2842","name":"巴国布衣软件园店","coupon":"持光大银行信用卡享成都巴国布衣8.8折优惠,截止2012-12-31.","location":"四川省成都市高新区世纪城南路399号","distance":"683m","picUrl":"http://www.warmtel.com/igme_pic/1f4781f9329b40218544fd4b7ec673c9.jpg","couponType":"NO","cardType":"YES","groupType":"NO","gpsX":104.080254,"gpsY":30.548117,"goodSayNum":0,"midSayNum":0,"badSayNum":0},{"merchantID":"5325","name":"香妃儿美容美体","coupon":"38元享980元超值美胸丰胸套餐","location":"四川省成都市高新区远大都市风景二期二号","distance":"703m","picUrl":"http://www.warmtel.com/igme_pic/26cfa2c850dd40cf9518d71ea55b687b.jpg","couponType":"NO","cardType":"NO","groupType":"NO","gpsX":104.080344,"gpsY":30.535779,"goodSayNum":0,"midSayNum":0,"badSayNum":0},{"merchantID":"3718","name":"锦咖啡","coupon":"凭锦咖啡折扣券可享餐品8.5折,饮品7.5折,牛排6.8折优惠.\r\n\r\n1.该优惠有效期:截止至2012年12月31日;\r\n2.凭此券可以享受以下优惠:\r\n餐品8.5折\r\n饮品7.5折\r\n牛排6.8折\r\n(营业时间:09:30-23:30)\r\n\r\n展示此页即享优惠.","location":"四川省成都市高新区天华路447-1号[近天府软件园B区]","distance":"874m","picUrl":"http://www.warmtel.com/igme_pic/7629ff4f8beb43d1bd0967baba46f6c6.jpg","couponType":"YES","cardType":"YES","groupType":"NO","gpsX":104.078756,"gpsY":30.549577,"goodSayNum":3,"midSayNum":0,"badSayNum":0},{"merchantID":"2416","name":"蜀国飘香远大店","coupon":"享菜品8.8折优惠(酒水除外)","location":"四川省成都市高新区远大都市风景商业街3号楼","distance":"1041m","picUrl":"http://www.warmtel.com/igme_pic/8f0e793995084f76a59cc789fb6f6c7e.jpg","couponType":"NO","cardType":"NO","groupType":"NO","gpsX":104.077334,"gpsY":30.533345,"goodSayNum":0,"midSayNum":0,"badSayNum":0},{"merchantID":"3719","name":"华庭茶府","coupon":"100元享120元小包优惠","location":"四川省成都市高新区天华路329号附1号[近天府软件园B区]","distance":"1057m","picUrl":"http://www.warmtel.com/igme_pic/1eeae0d361f54124bdd3b6600dcc6074.jpg","couponType":"YES","cardType":"YES","groupType":"NO","gpsX":104.078705,"gpsY":30.551274,"goodSayNum":0,"midSayNum":0,"badSayNum":0}]}}
//首先将数据一层层分出，写数据源的类：注：每一层所有数据都需要写出来，数据类型也必须一一对应
最外层：
public class JsonInfo { private int resultCode; private String resultInfo; private PageinfoMer info; public int getResultCode() { return resultCode; } public void setResultCode(int resultCode) { this.resultCode = resultCode; } public String getResultInfo() { return resultInfo; } public void setResultInfo(String resultInfo) { this.resultInfo = resultInfo; } public PageinfoMer getInfo() { return info; } public void setInfo(PageinfoMer info) { this.info = info; }}
info这一层
public class PageinfoMer { private PageTotal pageInfo; private List<Contents> merchantKey; public List<Contents> getMerchantKey() { return merchantKey; } public void setMerchantKey(List<Contents> merchantKey) { this.merchantKey = merchantKey; } public PageTotal getPageInfo() { return pageInfo; } public void setPageInfo(PageTotal pageInfo) { this.pageInfo = pageInfo; }}
pageInfo这层
public class PageTotal { private int total; private int pageSize; private int lastPageNumber; private int nowPage; private int currNum; public int getTotal() { return total; } public void setTotal(int total) { this.total = total; } public int getPageSize() { return pageSize; } public void setPageSize(int pageSize) { this.pageSize = pageSize; } public int getLastPageNumber() { return lastPageNumber; } public void setLastPageNumber(int lastPageNumber) { this.lastPageNumber = lastPageNumber; } public int getNowPage() { return nowPage; } public void setNowPage(int nowPage) { this.nowPage = nowPage; } public int getCurrNum() { return currNum; } public void setCurrNum(int currNum) { this.currNum = currNum; }}
merchantKey这层
public class Contents { private String merchantID; private String name; private String coupon; private String location; private String distance; private String picUrl; private String couponType; private String cardType; private String groupType; private String gpsX; private String gpsY; private int goodSayNum; private int midSayNum; private int badSayNum; public String getMerchantID() { return merchantID; } public void setMerchantID(String merchantID) { this.merchantID = merchantID; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getCoupon() { return coupon; } public void setCoupon(String coupon) { this.coupon = coupon; } public String getLocation() { return location; } public void setLocation(String location) { this.location = location; } public String getDistance() { return distance; } public void setDistance(String distance) { this.distance = distance; } public String getPicUrl() { return picUrl; } public void setPicUrl(String picUrl) { this.picUrl = picUrl; } public String getCouponType() { return couponType; } public void setCouponType(String couponType) { this.couponType = couponType; } public String getCardType() { return cardType; } public void setCardType(String cardType) { this.cardType = cardType; } public String getGroupType() { return groupType; } public void setGroupType(String groupType) { this.groupType = groupType; } public String getGpsX() { return gpsX; } public void setGpsX(String gpsX) { this.gpsX = gpsX; } public String getGpsY() { return gpsY; } public void setGpsY(String gpsY) { this.gpsY = gpsY; } public int getGoodSayNum() { return goodSayNum; } public void setGoodSayNum(int goodSayNum) { this.goodSayNum = goodSayNum; } public int getMidSayNum() { return midSayNum; } public void setMidSayNum(int midSayNum) { this.midSayNum = midSayNum; } public int getBadSayNum() { return badSayNum; } public void setBadSayNum(int badSayNum) { this.badSayNum = badSayNum; }}可以在建一个类，将自己需要的数据在提出来
public class UserBean { private String name; private String coupon; private String location; private String distance; private String picUrl; private int couponType; private int cardType; private int groupType; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getCoupon() { return coupon; } public void setCoupon(String coupon) { this.coupon = coupon; } public String getLocation() { return location; } public void setLocation(String location) { this.location = location; } public String getDistance() { return distance; } public void setDistance(String distance) { this.distance = distance; } public String getPicUrl() { return picUrl; } public void setPicUrl(String picUrl) { this.picUrl = picUrl; } public int getCouponType() { return couponType; } public void setCouponType(int couponType) { this.couponType = couponType; } public int getCardType() { return cardType; } public void setCardType(int cardType) { this.cardType = cardType; } public int getGroupType() { return groupType; } public void setGroupType(int groupType) { this.groupType = groupType; }}
这些数据需要在listView上显示，需要adapter适配器
listview 的xml文件和布局xml文件：
listview的xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ffeaeeea" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#ffffff"> <ImageView android:layout_width="35dp" android:layout_height="35dp" android:src=http://www.mamicode.com/"@drawable/btn_back">
布局xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="6dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:background="#ffffff"> <ImageView android:id="@+id/picUrlimg" android:layout_width="90dp" android:layout_height="90dp" android:padding="5dp"/> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:layout_marginLeft="5dp"> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content"> <TextView android:id="@+id/nametext" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="@android:color/black" android:textSize="17sp" android:singleLine="true" android:ellipsize="end"/> <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginRight="5dp"> <ImageView android:id="@+id/kaimg" android:layout_width="wrap_content" android:layout_height="18dp" android:layout_alignParentRight="true"/> <ImageView android:id="@+id/juanimg" android:layout_width="wrap_content" android:layout_height="18dp" android:layout_toLeftOf="@id/kaimg"/> <ImageView android:id="@+id/tuanimg" android:layout_width="wrap_content" android:layout_height="18dp" android:layout_toLeftOf="@id/juanimg"/> </RelativeLayout> </LinearLayout> <TextView android:id="@+id/coupontext" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="17sp" android:textColor="@android:color/holo_red_dark" android:layout_marginTop="5dp" android:singleLine="true" android:ellipsize="end"/> <RelativeLayout android:layout_width="wrap_content" android:layout_height="wrap_content"> <TextView android:id="@+id/locationtext" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="5dp" android:layout_marginRight="70dp" android:textSize="16sp" android:singleLine="true" android:ellipsize="end"/> <TextView android:id="@+id/distancetext" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:layout_marginBottom="5dp" android:layout_marginRight="5dp" android:textSize="15sp"/> <ImageView android:id="@+id/dingwei" android:layout_width="18dp" android:layout_height="18dp" android:src=http://www.mamicode.com/"@drawable/info_map">
baseadapter适配器：public class JsonBaseAdapter extends BaseAdapter { private LayoutInflater mLayoutInflater; private Context mContext; private ArrayList<UserBean> arrayList=new ArrayList<UserBean>(); public JsonBaseAdapter(Context context) { mContext=context; mLayoutInflater=LayoutInflater.from(context); } public void setdata(ArrayList<UserBean> list){ arrayList=list; notifyDataSetChanged(); } @Override public int getCount() { return arrayList.size(); } @Override public Object getItem(int i) { return i; } @Override public long getItemId(int i) { return i; } @Override public View getView(int i, View view, ViewGroup viewGroup) { Viewhode viewhode=null; if (view==null){ viewhode=new Viewhode(); view=mLayoutInflater.inflate(R.layout.buju,null); viewhode.picUrl=(ImageView)view.findViewById(R.id.picUrlimg); viewhode.name=(TextView)view.findViewById(R.id.nametext); viewhode.couponType=(ImageView)view.findViewById(R.id.juanimg); viewhode.cardType=(ImageView)view.findViewById(R.id.kaimg); viewhode.groupType=(ImageView)view.findViewById(R.id.tuanimg); viewhode.coupon=(TextView)view.findViewById(R.id.coupontext); viewhode.location=(TextView)view.findViewById(R.id.locationtext); viewhode.distance=(TextView)view.findViewById(R.id.distancetext); view.setTag(viewhode); }else { viewhode=(Viewhode)view.getTag(); } viewhode.name.setText(arrayList.get(i).getName()); viewhode.coupon.setText(arrayList.get(i).getCoupon()); viewhode.location.setText(arrayList.get(i).getLocation()); viewhode.distance.setText(arrayList.get(i).getDistance()); viewhode.cardType.setImageResource(arrayList.get(i).getCardType()); viewhode.groupType.setImageResource(arrayList.get(i).getGroupType()); viewhode.couponType.setImageResource(arrayList.get(i).getCouponType()); Picasso.with(mContext).load(arrayList.get(i).getPicUrl()).into(viewhode.picUrl); return view; } public class Viewhode{ ImageView picUrl=null; TextView name=null; ImageView couponType=null; ImageView cardType=null; ImageView groupType=null; TextView coupon=null; TextView location=null; TextView distance=null; }}
在activity中用流将网络去到的数据读出来，在将json数据解析出来public class MyActivity extends Activity { private ListView listView; private JsonBaseAdapter jsonBaseAdapter; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.main); listView=(ListView)findViewById(R.id.onelist); jsonBaseAdapter=new JsonBaseAdapter(MyActivity.this); listView.setAdapter(jsonBaseAdapter); new AsyncTask<String,Void,ArrayList<UserBean>>(){ private String url="http://192.168.1.199:8080/jj.txt"; URL url1=null; InputStream is=null; StringBuffer sb=new StringBuffer(); BufferedReader br=null; @Override protected ArrayList<UserBean> doInBackground(String... strings) { try { url1=new URL(url); is=url1.openStream(); br=new BufferedReader(new InputStreamReader(is)); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } String line=null; try { while ((line=br.readLine())!=null){ sb.append(line); } } catch (IOException e) { e.printStackTrace(); } Gson gson=new Gson(); Log.e("sb",sb.toString()); JsonInfo jsonInfo=gson.fromJson(sb.toString(),JsonInfo.class); PageinfoMer pageinfoMer=jsonInfo.getInfo(); ArrayList<UserBean> list=new ArrayList<UserBean>(); for(Contents c:pageinfoMer.getMerchantKey()){ UserBean u=new UserBean(); u.setName(c.getName()); u.setCoupon(c.getCoupon()); u.setDistance(c.getDistance()); u.setLocation(c.getLocation()); u.setPicUrl(c.getPicUrl()); if(c.getCardType().equals("YES")){ u.setCardType(R.drawable.near_card); } if(c.getCouponType().equals("YES")){ u.setCouponType(R.drawable.near_ticket); } if(c.getGroupType().equals("YES")){ u.setGroupType(R.drawable.near_group); } list.add(u); } return list; } @Override protected void onPostExecute(ArrayList<UserBean> list) { jsonBaseAdapter.setdata(list); } }.execute(); }}
附：效果图
json数据解析，并实现将网络json数据获取用listview显示
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