實作自訂中繼資料支援

您可以使用回撥函式，針對內容、廣告和章節追蹤呼叫提供自訂中繼資料。

回呼函式會在進行追蹤呼叫之前叫用，因此您的應用程式可以附加廣告或章節專屬的中繼資料。

1. 叫用內容、廣告和章節的回呼函式。

   // Video Metadata Block
   // In a separate public class Implement an instance
   // of VideoAnalyticsMetadata.VideoMetadataBlock
   
   public class VideoMetadataBlockImpl
     implements VideoAnalyticsMetadata.VideoMetadataBlock {
   
       private final String video_id;
       private final String player_version;
   
       public VideoMetadataBlockImpl(String id, String version) {
           this.video_id = id == null ? "" : id;
           this.player_version = version == null ? "" : version;
       }
       @Override
       public HashMap<String, String> call() {
           HashMap<String, String> result = new HashMap<String, String>();
           result.put("videoid", video_id);
           result.put("mysdkversion", player_version);
           return result;
       }
   }
   // Create an instance of the above created
   // public class and assign it to vaMetadata
   vaMetadata.setVideoMetadataBlock(
     new VideoMetadataBlockImpl("1234", "1.2.3.4"));
   
   // Ad Metadata Block that is invoked on every ad start
   // In a separate public class Implement an instance of
   // VideoAnalyticsMetadata.AdMetadataBlock
   
   public class AdMetadataBlockImpl
     implements VideoAnalyticsMetadata.AdMetadataBlock {
   
       private final String ad_id;
       private final String ad_sdkversion;
   
       public AdMetadataBlockImpl(String id, String version) {
           this.ad_id = id == null ? "" : id;
           this.ad_sdkversion = version == null ? "" : version;
       }
   
       @Override
       public HashMap<String, String> call() {
           HashMap<String, String> result = new HashMap<String, String>();\
           result.put("myadid", ad_id);
           result.put("myad-sdkversion", ad_sdkversion);
           return result;
       }
   }
   // Create an instance of above created
   // public class and assign it to vaMetadata
   vaMetadata.setAdMetadataBlock(
     new AdMetadataBlockImpl("ad-1234", "1.2.3.4"));
   
   // Chapter Metadata Block that is invoked on every chapter start
   // In a separate public class Implement an instance of
   // VideoAnalyticsMetadata.ChapterMetadataBlock
   
   public class ChapterMetadataBlockImpl
     implements VideoAnalyticsMetadata.ChapterMetadataBlock {
   
       private final String chapter_id;
       private final String chapter_sdkversion;
   
       public ChapterMetadataBlockImpl(String id, String version) {
   
           this.chapter_id = id == null ? "" : id;
           this.chapter_sdkversion = version == null ? "" : version;
       }
   
       @Override
       public HashMap<String, String> call() {
   
           HashMap<String, String> result = new HashMap<String, String>();
           result.put("mychapterid", chapter_id);
           result.put("mychapter-sdkversion", chapter_sdkversion);
           return result;
   
           }
   }
   // Create an instance of above created public class and
   // assign it to vaMetadata
   vaMetadata.setChapterMetadataBlock(
     new ChapterMetadataBlockImpl("chapter-1234", "1.2.3.4"));