是否将动画Drawable保存到GIF文件？

Question

I am trying to make an image keyboard with the Android Commit Content API . In order to implement this, I need be able to store .png and .gif files on the device and create file objects from them.

Currently, I am using the Glide library to fetch images from the internet. An example image I might fetch is this . The Glide library provides me with drawables that contain animated GIFs. I need to be able to encode these drawables into .gif files that can be saved as files on the user's phone.

How can I do this?

I've looked at existing posts, such as this: How to convert a Drawable to a Bitmap? , but they aren't helpful because the Bitmap object cannot store animated GIFs.

This post: saving gif file from drawable into phone sd? and remove it from sd after usage also seems relevant, but, it doesn't explain how to turn an animated Drawable object into a list of Bitmap objects.

Also, it doesn't explain how to save a series of Bitmap objects as 1 GIF file.

Answer 1

This is how you can save a GifDrawable from the Glide library as a file.

private fun gifDrawableToFile(gifDrawable: GifDrawable, gifFile: File) {
    val byteBuffer = gifDrawable.buffer
    val output = FileOutputStream(gifFile)
    val bytes = ByteArray(byteBuffer.capacity())
    (byteBuffer.duplicate().clear() as ByteBuffer).get(bytes)
    output.write(bytes, 0, bytes.size)
    output.close()
}