getThumbnail
void getThumbnail (int index,
PlaybackSeekDataProvider.ResultCallback callback)
Called to get thumbnail bitmap. This method is called on UI thread. When provider finds
cache bitmap, it may invoke onThumbnailLoaded(Bitmap, int)
immediately. Provider may start background thread and invoke
onThumbnailLoaded(Bitmap, int)
later in UI thread. The method might
be called multiple times for the same position, PlaybackSeekDataProvider must guarantee
to replace pending PlaybackSeekDataProvider.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.
Parameters |
index |
int : Index of position in getSeekPositions() . |
callback |
PlaybackSeekDataProvider.ResultCallback : The callback to receive the result on UI thread. It may be called within
getThumbnail() if hit cache directly.
|
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Last updated 2024-04-11 UTC.