PlaybackSeekDataProvider
class PlaybackSeekDataProvider
Class to be implemented by app to provide seeking data and thumbnails to UI.
Summary
Nested types |
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Client to receive result for |
Public constructors |
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Public functions |
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LongArray<Long>! |
Get a list of sorted seek positions. |
Unit |
getThumbnail(Called to get thumbnail bitmap. |
Unit |
reset()Called when seek stops, Provider should cancel pending requests for the thumbnails. |
Public constructors
Public functions
getSeekPositions
fun getSeekPositions(): LongArray<Long>!
Get a list of sorted seek positions. The positions should not change after user starts seeking.
getThumbnail
fun getThumbnail(
index: Int,
callback: PlaybackSeekDataProvider.ResultCallback!
): Unit
Called to get thumbnail bitmap. This method is called on UI thread. When provider finds cache bitmap, it may invoke onThumbnailLoaded immediately. Provider may start background thread and invoke onThumbnailLoaded later in UI thread. The method might be called multiple times for the same position, PlaybackSeekDataProvider must guarantee to replace pending ResultCallback with the new one. When seeking right, getThumbnail() will be called with increasing index; when seeking left, getThumbnail() will be called with decreasing index. The increment of index can be used by subclass to determine prefetch direction.
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index: Int |
Index of position in |
callback: PlaybackSeekDataProvider.ResultCallback! |
The callback to receive the result on UI thread. It may be called within getThumbnail() if hit cache directly. |