505
android2.2縮略圖類ThumbnailUtils
提供了四個對外的靜態接口
1.
Bitmap Android.media.ThumbnailUtils.createImageThumbnail(String filePath, int kind)
This method first examines if the thumbnail embedded in EXIF is bigger than our target size. If not, then it'll create a thumbnail from original image. Due to efficiency consideration, we want to let MediaThumbRequest avoid calling this method twice for both
kinds, so it only requests for MICRO_KIND and set saveImage to true. This method always returns a "square thumbnail" for MICRO_KIND thumbnail.
Parameters:
filePath the path of image file
kind could be MINI_KIND or MICRO_KIND
Returns:
Bitmap
@hide
This method is only used by media framework and media provider internally.
2.
Bitmap android.media.ThumbnailUtils.createVideoThumbnail(String filePath, int kind)
返回視頻縮略圖，如果視頻損壞或格式不被支持那麼都將返回為空
filePath：視頻文件的位置
kind：Images.Thumbnails.MICRO_KIND或者Images.Thumbnails.MINI_KIND最終和分辨率有關
3.
Bitmap android.media.ThumbnailUtils.extractThumbnail(Bitmap source, int width, int height)
創建一個指定大小居中的縮略圖
4.
Bitmap android.media.ThumbnailUtils.extractThumbnail(Bitmap source, int width, int height, int options)
創建一個指定大小居中的縮略圖，如果options定義為OPTIONS_RECYCLE_INPUT，則回收資源
ThumbnailUtils類是API Level從8或更高才開始支持的，不向下兼容
最後更新：2017-04-02 17:09:29