使用Telerik控件搭建Doubanfm频道部分

今天感觉好累啊。。还是坚持记录下。

收集的API：

https://github.com/HakurouKen/douban.fm-api

https://github.com/zonyitoo/doubanfm-qt/wiki/%E8%B1%86%E7%93%A3FM-API

https://github.com/ampm/douban-fm-sdk

都没有提到Cookie

利用这个API，本来想弄下COOKie的但是Post请求老是通过不过，索性作罢

记录下频道部分的搭建

根据下面的已知分组情况，想到用XML保存下来，再用分组的控件比较好。

想到像Toolkit的longlist(具体名字我忘了）在telerik的控件下，有一个更加方便使用的，叫RadDataBoundListBox，非常好用，分起组来很简单。

首先老样子，先绑定一个DataContext,新建VM类，Ioc注册等等。

一：频道表：

已知固定频道

channel=0 私人兆赫 type=e()

Region&Lang

channel=1 公共兆赫【地区 语言】：华语MHZ
channel=6 公共兆赫【地区 语言】：粤语MHZ
channel=2 公共兆赫【地区 语言】：欧美MHZ
channel=22 公共兆赫【地区 语言】：法语MHZ
channel=17 公共兆赫【地区 语言】：日语MHZ
channel=18 公共兆赫【地区 语言】：韩语MHZ

Ages

channel=3  公共兆赫【年代】：70年代MHZ
channel=4  公共兆赫【年代】：80年代MHZ
channel=5  公共兆赫【年代】： 90年代MHZ

Genre

channel=8 公共兆赫【流派】：民谣MHZ
channel=7 公共兆赫【流派】：摇滚MHZ
channel=13 公共兆赫【流派】：爵士MHZ
channel=27 公共兆赫【流派】：古典MHZ
channel=14 公共兆赫【流派】：电子MHZ
channel=16 公共兆赫【流派】：R&BMHZ
channel=15 公共兆赫【流派】：说唱MHZ
channel=10 公共兆赫【流派】：电影原声MHZ

Special

channel=20 公共兆赫【特辑】：女声MHZ
channel=28 公共兆赫【特辑】：动漫MHZ
channel=32 公共兆赫【特辑】：咖啡MHZ
channel=67 公共兆赫【特辑】：东京事变MHZ

Com

channel=52 公共兆赫【品牌】：乐混翻唱MHZ
channel=58 公共兆赫【品牌】：路虎揽胜运动MHZ

Artist

channel=26 公共兆赫：豆瓣音乐人MHZ
channel=dj DJ兆赫

其对应的XML

 <?xml version="1.0" encoding="utf-8"?>
 <AlreadyKnowChannels>
     <Channel name="华语MHZ" channelid="1" group="Langurage"></Channel>
     <Channel name="粤语MHZ" channelid="6" group="Langurage"></Channel>
     <Channel name="欧美MHZ" channelid="2" group="Langurage"></Channel>
     <Channel name="法语MHZ" channelid="22" group="Langurage"></Channel>
     <Channel name="日语MHZ" channelid="17" group="Langurage"></Channel>
     <Channel name="韩语MHZ" channelid="18" group="Langurage"></Channel>
     <Channel name="70年代MHZ" channelid="3" group="Ages"></Channel>
     <Channel name="80年代MHZ" channelid="4" group="Ages"></Channel>
     <Channel name="90年代MHZ" channelid="5" group="Ages"></Channel>
     <Channel name="民谣MHZ" channelid="8" group="Genre"></Channel>
     <Channel name="摇滚MHZ" channelid="7" group="Genre"></Channel>
     <Channel name="爵士MHZ" channelid="13" group="Genre"></Channel>
     <Channel name="古典MHZ" channelid="27" group="Genre"></Channel>
     <Channel name="电子MHZ" channelid="14" group="Genre"></Channel>
     <Channel name="RBMHZ" channelid="16" group="Genre"></Channel>
     <Channel name="说唱MHZ" channelid="15" group="Genre"></Channel>
     <Channel name="电影原声MHZ" channelid="10" group="Genre"></Channel>
     <Channel name="女声MHZ" channelid="20" group="Special"></Channel>
     <Channel name="动漫MHZ" channelid="28" group="Special"></Channel>
     <Channel name="咖啡MHZ" channelid="32" group="Special"></Channel>
     <Channel name="东京事变MHZ" channelid="67" group="Special"></Channel>
     <Channel name="乐混翻唱MHZ" channelid="52" group="Com"></Channel>
     <Channel name="路虎揽胜运动MHZ" channelid="58" group="Com"></Channel>
     <Channel name="豆瓣音乐人MHZ" channelid="26" group="Artist"></Channel>
     <Channel name="DJ兆赫" channelid="dj" group="Artist"></Channel>
 </AlreadyKnowChannels>

         XDocument xdoc = XDocument.Load("XML/Channels.xml");
             XMLChannels = xdoc.Root.Descendants("Channel").Select(
                  (element) =>
                  {
                      return new Channel
                      {
                          name = (string)element.Attribute("name"),
                          channelid = (string)element.Attribute("channelid"),
                          group = (string)element.Attribute("group")
                      };
                  }).ToList();

再导入， XMLChannels是List<Channe>类型。

接下来创建Model

      for (int i = ; i < XMLChannels.Count; i++)
             {
                 channels.Add(new 豆瓣电台.Model.Channel() { ChannelGroup = XMLChannels[i].group, ChannelName = XMLChannels[i].name, ChannelId = XMLChannels[i].channelid });
             }

下面是请求图片，由于异步关系，我们要把请求的顺序编号（就是那个i)也放到get类中去。

再在返回的string中放入末尾。最后就可以从订阅者里面取出来了。10,11行即是计算编号并去掉末尾这个编号，(这个编号是为了表明请求的频道ID与我们的频道表的索引(index)的一一对应的关系）

    for (int i = ; i < Channels.Count; i++)
             {
                 new MyRxGetMethodService().Get("http://douban.fm/j/explore/get_channel_info?cid=" + channels[i].ChannelId, i).ObserveOn(Deployment.Current)
                .Subscribe(
                     (result) =>
                     {

                             try
                             {
                                 int tempcount = int.Parse(result.Substring(result.LastIndexOf("}") + , ));
                                 result = result.Substring(, result.LastIndexOf("}") + );
                                 JToken temptoken = JToken.Parse(result)["data"]["res"];
                               //  BitmapImage bitmap = new BitmapImage();
                              //   bitmap.UriSource = new Uri(temptoken["cover"].ToString(), UriKind.Absolute);
                                 var dataitem = channels[tempcount];
                                 dataitem.ChannelImageSource = new Uri(temptoken["cover"].ToString(), UriKind.Absolute);
                                 dataitem.ChannelIntro = temptoken["intro"].ToString();

                             }
                             catch
                             {
                             }

                     });
               //  Thread.Sleep(100);
             }

背后逻辑基本好了，下面是界面

databoundlist的itemtemplate如下：用了一个SlideHubTile，使结果看起来生动一点，SlideHubTile有正面样式和背面样式。

   <DataTemplate x:Key="JumpListItemTemplate">
                 <Grid >
                     <Grid.Resources>
                         <DataTemplate x:Key="TitleHub">
                             <Grid>
                                 <TextBlock Text="{Binding ChannelName}" Foreground="White"/>
                             </Grid>
                         </DataTemplate>
                         <DataTemplate x:Key="BackHub">
                             <Grid Background="#FF0072FF">
                                 <Image Source="{Binding ChannelImageSource}"
                                     Stretch="UniformToFill"/>
                                 <StackPanel Orientation="Vertical">
                                     <TextBlock Text="{Binding ChannelIntro}" Foreground="White" Height="85.5" Width="150" HorizontalAlignment="Left"/>
                                     <TextBlock Height="85.5" Text="{Binding ChannelName}" Width="150" HorizontalAlignment="Left" Margin="0" Foreground="#FFE2901B"/>
                                 </StackPanel>
                             </Grid>
                         </DataTemplate>
                     </Grid.Resources>
                     <telerikPrimitives:RadSlideHubTile  Title="{Binding}" TitleTemplate="{StaticResource TitleHub}"  BackContentTemplate="{StaticResource BackHub}" BackContent="{Binding}" Foreground="#FF1BA1E2">
                         <telerikPrimitives:RadSlideHubTile.Picture>
                             <Image Source="{Binding ChannelImageSource}"
                                 Stretch="UniformToFill"/>
                         </telerikPrimitives:RadSlideHubTile.Picture>
                     </telerikPrimitives:RadSlideHubTile>
                 </Grid>
             </DataTemplate>

对于组的显示样式，我们可以用原先的模板

  <helpers:JumpListFirstItemTemplateSelector x:Key="HeaderTemplateSelector">
                 <helpers:JumpListFirstItemTemplateSelector.FirstItemTemplate>
                     <DataTemplate>
                         <Grid Margin="0,-8,0,12" Width="480">
                             <TextBlock FontSize="{StaticResource PhoneFontSizeMedium}" Text="{Binding }" TextWrapping="Wrap"/>
                         </Grid>
                     </DataTemplate>
                 </helpers:JumpListFirstItemTemplateSelector.FirstItemTemplate>
                 <helpers:JumpListFirstItemTemplateSelector.StandardItemTemplate>
                     <DataTemplate>
                         <Grid Margin="0,20,0,12" Width="480">
                             <TextBlock  FontSize="{StaticResource PhoneFontSizeMedium}" Text="{Binding }" TextWrapping="Wrap"/>
                         </Grid>
                     </DataTemplate>
                 </helpers:JumpListFirstItemTemplateSelector.StandardItemTemplate>
 </helpers:JumpListFirstItemTemplateSelector>

最后是DataBoundList的XAML

    <telerikData:RadJumpList Margin="18,56,18,-44"
                                      GroupDescriptorsSource="{Binding ChannelGroupDescriptors}"
                                      ItemsSource="{Binding Channels}"
                                      ItemTemplate="{StaticResource JumpListItemTemplate}"
                                      GroupHeaderTemplateSelector="{StaticResource HeaderTemplateSelector}"
                                      x:Name="jumplist"
                                      >
                 <telerikData:RadJumpList.VirtualizationStrategyDefinition>
                     <telerikPrimitives:WrapVirtualizationStrategyDefinition Orientation="Horizontal"/>
                 </telerikData:RadJumpList.VirtualizationStrategyDefinition>
                 <i:Interaction.Triggers>
                     <i:EventTrigger EventName="ItemTap">
                         <GalaSoft_MvvmLight_Command:EventToCommand Command="{Binding ShowChannleDetials, Mode=OneWay}" PassEventArgsToCommand="True"/>
                     </i:EventTrigger>
                 </i:Interaction.Triggers>
   </telerikData:RadJumpList>

用Command把点选的频道传到VM中去。

效果大致如下，(有些图片出不来，有点没弄明白)

二：具体频道信息

借用前段时间看DEEPDIVEMVVM中学到的，注入一个导航接口，

思路大致就是那个视频中提到的思路，也有源码下载。

    public RelayCommand<Telerik.Windows.Controls.ListBoxItemTapEventArgs> ShowChannleDetials
         {
             get
             {
                 return showchanneldetials
                     ?? (showchanneldetials = new RelayCommand<Telerik.Windows.Controls.ListBoxItemTapEventArgs>(
                                           (args) =>
                                           {
                                               Channel item = (args.Item.Content) as Channel;
                                               string key = item.ChannelId;
                                               new MyRxGetMethodService().Get("http://douban.fm/j/mine/playlist?type=n&channel=" + item.ChannelId + "&pb=64&from=mainsite").ObserveOn(Deployment.Current).Subscribe(
                                                   (result) =>
                                                   {
                                                       var songs_string = JToken.Parse(result)["song"].ToString();
                                                       var MySongs = JsonConvert.DeserializeObject<List<Song>>(songs_string);
                                                       if (!SimpleIoc.Default.IsRegistered<ChannelDetailViewModel>(key))
                                                       {
                                                           SimpleIoc.Default.Register<ChannelDetailViewModel>(
                                                               () =>
                                                               {
                                                                   var mainvm = new ChannelDetailViewModel(MySongs,item.ChannelName,item.ChannelIntro,item.ChannelId,item.ChannelImageSource);

                                                                   return mainvm;
                                                               }, key);
                                                       }
                                                       _navigate.NavigateTo(
                                                         new Uri(
                                                             "/ChannelDetail.xaml?" + key,
                                                             UriKind.Relative));

                                                   });

                                           }));
             }
         }

注意new的ChannelDetailViewModel时候注入参数，还有在Ioc中注册

View部分直接使用Telerik的模板：最后效果如下：

要注意在View中也有部分代码：

别忘了在退出这个页面的时候取消掉VM的注册(再点击的过程中会重复注册）

  public partial class ChannelDetail : PhoneApplicationPage
     {
         private string itemUrl;
         public ChannelDetail()
         {
             InitializeComponent();
         }
         protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
         {
             if (DataContext == null)
             {
                 var url = e.Uri.ToString();
                  itemUrl = url.Substring(url.IndexOf("?") + );

                 if (!SimpleIoc.Default.IsRegistered<ChannelDetailViewModel>(itemUrl))
                 {
                     MessageBox.Show("Item not found");
                     return;
                 }

                 var vm = SimpleIoc.Default.GetInstance<ChannelDetailViewModel>(itemUrl);

                 DataContext = vm;
             }
             base.OnNavigatedTo(e);
         }
         protected override void OnNavigatingFrom(System.Windows.Navigation.NavigatingCancelEventArgs e)
         {
             if (SimpleIoc.Default.IsRegistered<ChannelDetailViewModel>(itemUrl))
             {
                 SimpleIoc.Default.Unregister<ChannelDetailViewModel > (itemUrl);
             }
             base.OnNavigatingFrom(e);
         }
         private void Option1_Tap(object sender, System.Windows.Input.GestureEventArgs e)
         {
             this.Option1Viewer.Visibility = System.Windows.Visibility.Visible;
             this.Option1Arrow.Visibility = System.Windows.Visibility.Visible;
             this.Option2Viewer.Visibility = System.Windows.Visibility.Collapsed;
             this.Option2Arrow.Visibility = System.Windows.Visibility.Collapsed;
         }

         private void Option2_Tap(object sender, System.Windows.Input.GestureEventArgs e)
         {
             this.Option1Viewer.Visibility = System.Windows.Visibility.Collapsed;
             this.Option1Arrow.Visibility = System.Windows.Visibility.Collapsed;
             this.Option2Viewer.Visibility = System.Windows.Visibility.Visible;
             this.Option2Arrow.Visibility = System.Windows.Visibility.Visible;
         }
     }

还有点击图片更新歌曲：

使Songs重新指向一片区域，再raise属性改变，最后效果如下:

     public RelayCommand RefreshCommand
         {
             get
             {
                 return refreshcommand
                     ?? (refreshcommand = new RelayCommand(
                                           () =>
                                           {
                                               new MyRxGetMethodService().Get("http://douban.fm/j/mine/playlist?type=n&channel=" + ChannelId + "&pb=64&from=mainsite").ObserveOn(Deployment.Current).Subscribe(
                                               (result) =>
                                               {
                                                   var songs_string = JToken.Parse(result)["song"].ToString();
                                                   var Songs3 = JsonConvert.DeserializeObject<List<Song>>(songs_string);
                                                   Song[] tempsongs = new Song[songs.Count];
                                                   songs.CopyTo(tempsongs);
                                                   List<Song> songstemp1 = new List<Song>(tempsongs);
                                                   songstemp1.AddRange(Songs3);
                                                   Songs = songstemp1;
                                               });
                                           }));
             }
         }

三.结语

还有些想法还没实现，今天就到这里吧