[android help] Displaying part of a spritesheet in an Android ImageView

Displaying part of a spritesheet in an Android ImageView

In Android, is there a clean way to display only a given part of a bitmap in an ImageView (for example a single sprite of a sprite sheet), without having to :

• Manually split the bitmap png into small pngs (=> more drawables embedded in the app, tedious manual operation possibly leading to bugs, or loose the spritesheet).


• Have small pngs used in the ImageViews, with the sprite sheet being generated (=> complicated)


• Create "dirty" subclasses for ImageView, Drawable, etc (=> the more we use Android API "ASIS" the better)


• Programmatically create sub-bitmaps of the big bitmap (=> We have to do all the work programmatically)

For instance I have tried creating an ImageView of width/height of 40dp, and setting its drawable as a ClipDrawable displaying only the part of the bitmap I wanted, but it did not go well :

Furthermore this solution is feasable with a simple sprite sheet (for example 2*2 sprites), but I do not think it is possible when using something like a 4*4 sprite sheet. I think ClipDrawable is not meant for such a use.

Isn't there something "clean and easy" like in OpenGL where you can set a texture Id, and set the texture coordinates to display only part of the texture? Considering my researchs I think the best solution is to manually split the big bitmap with Bitmap.createBitmap, when I'd rather ask before starting something like that.

PS : I consider using SpriteSheets because of OpenGl, although my "menus" are developed using Android APIs, hence using ImageView.

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