概要
筆者近期做到對天氣預(yù)報(bào)JSON數(shù)據(jù)解析，在此小記。
天氣預(yù)報(bào)接口：http://wthrcdn.etouch.cn/weather_mini?citykey=101200101
JSON數(shù)據(jù)如下：
{ "desc": "OK", "status": 1000, "data": { "wendu": "14", "ganmao": "天氣轉(zhuǎn)涼，空氣濕度較大，較易發(fā)生感冒，體質(zhì)較弱的朋友請注意適當(dāng)防護(hù)。", "forecast": [ { "fengxiang": "無持續(xù)風(fēng)向", "fengli": "微風(fēng)級", "high": "高溫 17℃", "type": "小雨", "low": "低溫 10℃", "date": "30日星期四" }, { "fengxiang": "無持續(xù)風(fēng)向", "fengli": "微風(fēng)級", "high": "高溫 18℃", "type": "多云", "low": "低溫 7℃", "date": "31日星期五" }, { "fengxiang": "無持續(xù)風(fēng)向", "fengli": "微風(fēng)級", "high": "高溫 20℃", "type": "晴", "low": "低溫 8℃", "date": "1日星期六" }, { "fengxiang": "無持續(xù)風(fēng)向", "fengli": "微風(fēng)級", "high": "高溫 23℃", "type": "晴", "low": "低溫 10℃", "date": "2日星期天" }, { "fengxiang": "無持續(xù)風(fēng)向", "fengli": "微風(fēng)級", "high": "高溫 23℃", "type": "多云", "low": "低溫 12℃", "date": "3日星期一" } ], "yesterday": { "fl": "微風(fēng)", "fx": "無持續(xù)風(fēng)向", "high": "高溫 21℃", "type": "陰", "low": "低溫 12℃", "date": "29日星期三" }, "aqi": "114", "city": "武漢" }}最終解析效果：
解析概述
1、首先，接到的整個(gè)數(shù)據(jù)可以轉(zhuǎn)化為JSONObject對象。
2、通過整個(gè)數(shù)據(jù)的JSONObject對象獲取到data中的數(shù)據(jù)，也是一個(gè)JSONObject對象。在data中就可以獲取到此時(shí)溫度，以及城市等信息。
3、通過data的JSONObject對象可以獲取到forecast中的數(shù)據(jù)，forecast中的數(shù)據(jù)則是一個(gè)JSONArray對象。
4、通過forecast的JSONArray對象可以獲取到近幾天的天氣信息，每一條為一個(gè)JSONObject對象。
代碼
方便起見，筆者使用了volley框架，讀者新建項(xiàng)目需要在build.gradle的dependencies中添加如下:
compile 'eu.the4thfloor.volley:com.android.volley:2015.05.28'
MainActivity.java:
package com.example.double2.jsontext;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.widget.TextView;import com.android.volley.RequestQueue;import com.android.volley.Response;import com.android.volley.VolleyError;import com.android.volley.toolbox.JsonObjectRequest;import com.android.volley.toolbox.Volley;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;public class MainActivity extends AppCompatActivity { private TextView tvMain; private RequestQueue mRequestQueue; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { tvMain = (TextView) findViewById(R.id.tv_main); mRequestQueue = Volley.newRequestQueue(this); JsonObjectRequest mJsonObjectRequest = new JsonObjectRequest( "http://wthrcdn.etouch.cn/weather_mini?citykey=101200101", null, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject response) { try { JSONObject data = new JSONObject(response.getString("data")); JSONArray forecast = data.getJSONArray("forecast"); JSONObject todayWeather = forecast.getJSONObject(0); String wendu = data.getString("wendu") + "/n"; String ganmao = data.getString("ganmao") + "/n"; String high = todayWeather.getString("high") + "/n"; String low = todayWeather.getString("low") + "/n"; String date = todayWeather.getString("date") + "/n"; String city = data.getString("city") + "/n"; tvMain.setText(wendu + ganmao + high + low + date+city); } catch (JSONException e) { e.printStackTrace(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.e("TAG", error.getMessage(), error); } }); mRequestQueue.add(mJsonObjectRequest); }}activity_main.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="match_parent" android:padding="10dp" > <TextView android:id="@+id/tv_main" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" /></LinearLayout>
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