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:

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:padding="10dp"

>

android:id="@+id/tv_main"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Hello World!"

/>

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。