volley 访问网络时候获取json数据发生乱码问题解决方法，以及gson解析json数据。

摘要: http://wthrcdn.etouch.cn/weather_mini?citykey=101240101 获取南昌天气接口

重写parseNetworkResponse方法，对其编码进行转换。

//获取天气数据
public void getWeatherInfo(){
StringRequest stringRequest = new StringRequest(Nan_changURL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
//content.setText(response);
WeatherBean bean = getWeatherFromJson(response);//info为正确编码解析后的json数据，在bean中就可以获取第一级的若干参数
final ChildWeatherBean childWeatherBean = bean.data;//这是第二级的javabean，可获取当下的温度以及一些基本参数
Weather.ChildWeatherBean.GrandChildWeatherBean grandChildWeahterBean = childWeatherBean.yesterday;
//yesterday中的内容算是第三级的内容了,下面这句话也是第三级的内容，只不过这是一个List集合，这里就可以直接获取到了。
final ArrayList<Weather.ChildWeatherBean.GrandChildsWeatherBean> grandChildsWeatherBeans = childWeatherBean.forecast;
content.setText(grandChildWeahterBean.fx);
pd.dismiss();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}){
//volley解决中文乱码问题，真的很有用哦！！！要写个博客备注一下
@Override
protected Response<String> parseNetworkResponse(NetworkResponse response){
try {
String jsonString = new String(response.data, "UTF-8");
return Response.success(jsonString,
HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (Exception je) {
return Response.error(new ParseError(je));
}
}
};
mQueue.add(stringRequest);

}

gson解析json数据问题：gson将json转换文实体类、有几层我们就得建几个实体类；

/**
*
*/
package com.zhijianchanghang.model;
import java.util.ArrayList;
/**
* @Description: TODO(用一句话描述该文件做什么)
* @author daipengcheng
* @date 2015-12-20 下午4:37:20
* {
"desc": "OK",
"status": 1000,
"data": {
"wendu": "7",
"ganmao": "昼夜温差较大，较易发生感冒，请适当增减衣服。体质较弱的朋友请注意防护。",
"forecast": [
{
"fengxiang": "无持续风向",
"fengli": "微风级",
"high": "高温 12℃",
"type": "多云",
"low": "低温 6℃",
"date": "21日星期一"
},
{
"fengxiang": "无持续风向",
"fengli": "微风级",
"high": "高温 12℃",
"type": "小到中雨",
"low": "低温 9℃",
"date": "22日星期二"
},
{
"fengxiang": "无持续风向",
"fengli": "微风级",
"high": "高温 12℃",
"type": "中雨",
"low": "低温 9℃",
"date": "23日星期三"
},
{
"fengxiang": "北风",
"fengli": "3-4级",
"high": "高温 11℃",
"type": "小雨",
"low": "低温 7℃",
"date": "24日星期四"
},
{
"fengxiang": "北风",
"fengli": "3-4级",
"high": "高温 9℃",
"type": "多云",
"low": "低温 4℃",
"date": "25日星期五"
}
],
"yesterday": {
"fl": "微风",
"fx": "无持续风向",
"high": "高温 8℃",
"type": "小雨",
"low": "低温 4℃",
"date": "20日星期日"
},
"aqi": "106",
"city": "南昌"
}
}

* @version V1.0
*/
public class Weather {
public class WeatherBean {
public ChildWeatherBean data;
public int status;
public String desc;
}
public class ChildWeatherBean {
public int wendu;
public String ganmao;
public String city;
public GrandChildWeatherBean yesterday;
public ArrayList forecast;
public class GrandChildWeatherBean {
public String high;
public String fl;
public String date;
public String low;
public String type;
public String fx;
}
public class GrandChildsWeatherBean {
public String high;
public String fengli;
public String fengxiang;
public String date;
public String low;
public String type;
}
}
}

然后将json转化成bean

//content.setText(response);
WeatherBean bean = getWeatherFromJson(response);//info为正确编码解析后的json数据，在bean中就可以获取第一级的若干参数
final ChildWeatherBean childWeatherBean = bean.data;//这是第二级的javabean，可获取当下的温度以及一些基本参数
Weather.ChildWeatherBean.GrandChildWeatherBean grandChildWeahterBean = childWeatherBean.yesterday;
//yesterday中的内容算是第三级的内容了,下面这句话也是第三级的内容，只不过这是一个List集合，这里就可以直接获取到了。
final ArrayList<Weather.ChildWeatherBean.GrandChildsWeatherBean> grandChildsWeatherBeans = childWeatherBean.forecast;
content.setText(grandChildWeahterBean.fx);