android JSON解析数据 android解析天气预报

概要

笔者近期做到对天气预报JSON数据解析，在此小记。

天气预报接口：http://wthrcdn.etouch.cn/weather_mini?citykey=101200101

JSON数据如下：

{ "desc": "OK", "status": 1000, "data": { "wendu": "14", "ganmao": "天气转凉，空气湿度较大，较易发生感冒，体质较弱的朋友请注意适当防护。", "forecast": [  {  "fengxiang": "无持续风向",  "fengli": "微风级",  "high": "高温 17℃",  "type": "小雨",  "low": "低温 10℃",  "date": "30日星期四"  },  {  "fengxiang": "无持续风向",  "fengli": "微风级",  "high": "高温 18℃",  "type": "多云",  "low": "低温 7℃",  "date": "31日星期五"  },  {  "fengxiang": "无持续风向",  "fengli": "微风级",  "high": "高温 20℃",  "type": "晴",  "low": "低温 8℃",  "date": "1日星期六"  },  {  "fengxiang": "无持续风向",  "fengli": "微风级",  "high": "高温 23℃",  "type": "晴",  "low": "低温 10℃",  "date": "2日星期天"  },  {  "fengxiang": "无持续风向",  "fengli": "微风级",  "high": "高温 23℃",  "type": "多云",  "low": "低温 12℃",  "date": "3日星期一"  } ], "yesterday": {  "fl": "微风",  "fx": "无持续风向",  "high": "高温 21℃",  "type": "阴",  "low": "低温 12℃",  "date": "29日星期三" }, "aqi": "114", "city": "武汉" }}

最终解析效果：

解析概述

1、首先，接到的整个数据可以转化为JSONObject对象。
2、通过整个数据的JSONObject对象获取到data中的数据，也是一个JSONObject对象。在data中就可以获取到此时温度，以及城市等信息。
3、通过data的JSONObject对象可以获取到forecast中的数据，forecast中的数据则是一个JSONArray对象。
4、通过forecast的JSONArray对象可以获取到近几天的天气信息，每一条为一个JSONObject对象。

代码

方便起见，笔者使用了volley框架，读者新建项目需要在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() {   @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"?>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

更多相关文章

随机推荐