java - android如何获取一个图片文件夹中所有图片的缩略图？

Answer 1

When adding/deleting pictures in the folder, generate a thumbnail in advance, and then load it directly when needed.

p.s. The avatar of the WeChat group is pre-generated when the group is created.

p.p.s. If you generate all the pictures into a thumbnail first, if you do it incorrectly, it will directly cause OOM. If the number is large, you can only do it one by one....

Answer 2

MediaStore.Images.ThumbnailUtils can get thumbnails in bitmap format, which should solve your problem