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.