Bitmap类具有getThumbnail函数，该函数可以接受高度和宽度.您可以使用save功能保存它.尽管此功能的运行速度稍慢，但仍可方便使用.

祝你好运.

The Bitmap class has a getThumbnail function which accepts a height and width. You may save it using the save function. Though this function works little slower it is handy available.

Good luck.