Android: ThumbnailUtils.createVideoThumbnail return black bitmap


I am dealing with the thumbnail in Android. Even though I use the
function ThumbnailUtils.createVideoThumbnail provided by
Android, it gets black bitmap.



I start my research and find out some links:

1/ href="http://stackoverflow.com/questions/27351228/thumbnailutils-createvideothumbnail-return-null-bitmap-for-mp4-file">Thumbnail
null

2/ href="http://stackoverflow.com/questions/13303269/video-thumbnail-return-null">Video
Thumbnail return null



However, I checked my returned bitmap and figure out that it is not
null.



Please let me know if you have any ideas.



Any suggestion would be appreciated. Thank you in advance!


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