WP8.1开发:简单的天气预报应用

今天小梦给大家分享一个简单的天气预报应用源码:调用的是百度API.整个应用都没有什么难点.只是一个简单的网络请求和json数据处理.在WP8.1有小娜的情况下,天气预报应用还有意义吗?我认为还是有点意义的,至少数据更详细,而要想要用户喜欢,必须有比小娜更人性化的提醒和精美的UI.UI必须要精美.当然小梦今天分享的UI很简单.大家可以根据自己的想象去处理UI.之所以分享出来,是分享JSON的数据处理.在WP8.1开发XML读取中央气象城市代码文件中,分享了XML文件和JSON数据解析的方法,不过其中是直接处理的JSON数据,今天分享的是利用对象序列化JSON数据.当然,如有不当或错误,欢迎指正.

JSON数据本身:

{
"error": 0,
"status": "success",
"date": "2014-09-13",
"results": [
{
"currentCity": "西安市",
"pm25": "25",
"index": [
{
"title": "穿衣",
"zs": "较舒适",
"tipt": "穿衣指数",
"des": "建议着薄外套、开衫牛仔衫裤等服装。年老体弱者应适当添加衣物，宜着夹克衫、薄毛衣等。"
},
{
"title": "洗车",
"zs": "不宜",
"tipt": "洗车指数",
"des": "不宜洗车，未来24小时内有雨，如果在此期间洗车，雨水和路上的泥水可能会再次弄脏您的爱车。"
},
{
"title": "旅游",
"zs": "一般",
"tipt": "旅游指数",
"des": "温度适宜，有微风同行，但较强降雨的天气将给您的出行带来很多的不便，若坚持旅行建议带上雨具。"
},
{
"title": "感冒",
"zs": "较易发",
"tipt": "感冒指数",
"des": "天气较凉，较易发生感冒，请适当增加衣服。体质较弱的朋友尤其应该注意防护。"
},
{
"title": "运动",
"zs": "较不宜",
"tipt": "运动指数",
"des": "有较强降水，建议您选择在室内进行健身休闲运动。"
},
{
"title": "紫外线强度",
"zs": "最弱",
"tipt": "紫外线强度指数",
"des": "属弱紫外线辐射天气，无需特别防护。若长期在户外，建议涂擦SPF在8-12之间的防晒护肤品。"
}
],
"weather_data": [
{
"date": "周六 09月13日 (实时：16℃)",
"dayPictureUrl": "http://api.map.baidu.com/images/weather/day/zhongyu.png",
"nightPictureUrl": "http://api.map.baidu.com/images/weather/night/zhongyu.png",
"weather": "中雨",
"wind": "西南风微风",
"temperature": "15℃"
},
{
"date": "周日",
"dayPictureUrl": "http://api.map.baidu.com/images/weather/day/zhongyu.png",
"nightPictureUrl": "http://api.map.baidu.com/images/weather/night/zhongyu.png",
"weather": "中雨",
"wind": "西南风微风",
"temperature": "18 ~ 15℃"
},
{
"date": "周一",
"dayPictureUrl": "http://api.map.baidu.com/images/weather/day/zhongyu.png",
"nightPictureUrl": "http://api.map.baidu.com/images/weather/night/zhongyu.png",
"weather": "中雨",
"wind": "西南风微风",
"temperature": "19 ~ 15℃"
},
{
"date": "周二",
"dayPictureUrl": "http://api.map.baidu.com/images/weather/day/zhongyu.png",
"nightPictureUrl": "http://api.map.baidu.com/images/weather/night/zhongyu.png",
"weather": "中雨",
"wind": "西南风微风",
"temperature": "17 ~ 15℃"
}
]
}
]
}

我们根据JSON数据构建对象:(对象名称最好和数据名称保持一致)

public   class WeatherData
{
public int error { get; set; }
public string status { get; set; }
public string date { get; set; }
public List<resultsList> results { get; set; }

public class resultsList
{

public string currentCity{ get; set; }

public string pm25 { get; set; }
public List<indexList> index { get; set; }
public List<weather_dataList> weather_data { get; set; }
}
public struct indexList
{
public string title { get; set; }
public string zs { get; set; }
public string tipt { get; set; }
public string des { get; set; }

}

public struct weather_dataList
{
public string  date { get; set; }
public string weather { get; set; }
public string wind { get; set; }
public string temperature { get; set; }
public Uri dayPictureUrl { get; set; }
public Uri nightPictureUrl { get; set; }
}
}

应用前台代码:

<Pivot>
<PivotItem Header="天气" >
<ListView Name="listWeather">
<ListView.Header >
<StackPanel>
<TextBlock x:Name="textCity" FontSize="30"></TextBlock>
<TextBlock  x:Name="textPm" FontSize="25"  Foreground="Orange"></TextBlock>
</StackPanel>
</ListView.Header>
<ListView.ItemTemplate  >
<DataTemplate>
<Border  Width="360"   BorderThickness="2" BorderBrush="#FF2996AE">
<StackPanel >
<TextBlock Text="{Binding date}" FontSize="25"></TextBlock>
<TextBlock Text="{Binding weather}" FontSize="30"></TextBlock>
<StackPanel Orientation="Horizontal">
<Image Source="{Binding dayPictureUrl}" Stretch="Uniform"
Width="60" Height="60"></Image>
<Image Source="{Binding nightPictureUrl}" Stretch="Uniform"
Width="60" Height="60"></Image>
</StackPanel>
<TextBlock Text="{Binding wind}" FontSize="25"></TextBlock>
<TextBlock Text="{Binding temperature }" FontSize="30"></TextBlock>

</StackPanel>
</Border>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</PivotItem>
<PivotItem Header="指数">
<ListView Name="listIndex">
<ListView.ItemTemplate  >
<DataTemplate>
<Border>
<StackPanel >
<TextBlock Text="{Binding tipt }" FontSize="25" Foreground="#FF2996AE"></TextBlock>
<TextBlock Text="{Binding zs}" FontSize="30"  Foreground="Green"></TextBlock>
<TextBlock Text="{Binding des }" FontSize="20" TextWrapping="Wrap"></TextBlock>
</StackPanel>
</Border>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</PivotItem>
</Pivot>

</Grid>
<Page.BottomAppBar>
<CommandBar  Background="#FF2996AE">
<AppBarButton Icon="Sync" Label="刷新" Click="AppBarButton_Click"/>
</CommandBar>
</Page.BottomAppBar>

后台处理代码:

public sealed partial class MainPage : Page
{
private string latitude = null;
private string longitude = null;
private string responseText = null;
private HttpClient httpClient;
private HttpResponseMessage response;

private Weather.WeatherData.resultsList weather;

public MainPage()
{
this.InitializeComponent();
this.NavigationCacheMode = NavigationCacheMode.Required;

httpClient = new HttpClient();
var headers = httpClient.DefaultRequestHeaders;//获取每个请求标头的集合
headers.UserAgent.ParseAdd("ie");
headers.UserAgent.ParseAdd("Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)");
}

protected  async override void OnNavigatedTo(NavigationEventArgs e)
{
Geolocator geolocator = new Geolocator();
geolocator.DesiredAccuracyInMeters = 50;
try
{
Geoposition geoposition = await geolocator.GetGeopositionAsync(
maximumAge: TimeSpan.FromMinutes(5),
timeout: TimeSpan.FromSeconds(10));
latitude = geoposition.Coordinate.Point.Position.Latitude.ToString();
longitude = geoposition.Coordinate.Point.Position.Longitude.ToString();
}
catch (UnauthorizedAccessException)
{
Debug.WriteLine( "无法获取位置信息!");
}
}

private  async void AppBarButton_Click(object sender, RoutedEventArgs e)
{
response = new HttpResponseMessage();

Uri resourceUri;
String Address = "http://api.map.baidu.com/telematics/v3/weather?location="+longitude+","+latitude+"&output=json&ak=你的KEY";
Uri.TryCreate(Address.Trim(), UriKind.Absolute, out resourceUri);

try
{
response = await httpClient.GetAsync(resourceUri);

response.EnsureSuccessStatusCode();

responseText = await response.Content.ReadAsStringAsync();

}
catch (Exception ex)
{
Debug.WriteLine("网络请求失败!" + ex.Message.ToString());

}

DataContractJsonSerializer obj = new DataContractJsonSerializer(typeof(WeatherData));
WeatherData weatherData = obj.ReadObject(new MemoryStream(Encoding.UTF8.GetBytes(responseText))) as WeatherData;
weather = weatherData.results.FirstOrDefault();
listWeather.ItemsSource = weather.weather_data;
listIndex.ItemsSource = weather.index;
textCity.Text = weather.currentCity.ToString();
textPm.Text= "PM2.5:"+weather.pm25.ToString();

}

运行效果如下:





完整源码下载:WP8.1天气预报应用.