🙃🙃

Дайте норм гайд чтобы добавить cmake в ndk

Точнее в проект на андроид

do Bitmap's count as Native Memory or Java Memory?

it depends from version of api.

Android Pie/Q

as im trying to figure out how to prevent my native memory from climbing up to 800 MB when decoding, scaling, and drawing 34 bitmaps (from 1440x2844 to 56x111) inside a RecyclerView

caching java objects (with later reuse) is a good idea to solve this

there are examples how to do this in link

actually you don't need to reinvent the wheel
take look at glide library or picasso. they are designed for that

yep. first note there says exactly this 🙂

i already do this

i have tried those but glide and picasso have horrible real-time performance

oh god, Glide has horrible performance for image setting

https://github.com/mgood7123/SmartClick/commit/4ed9adaced19798d07fd34e3d8c5b527fa1146f5

using glide probably reduces the fps to about 6 images per second

without i get between 30 fps and 60 fps

and i dare say picasso would be worse than glide

(from 25.09.20 )

specifically, what i am doing, is


1. obtain a compressed bitmap array from my pool

2. invoke holder.bitmapView.setImageBitmap(holder.bitmapData, BitmapView.ScaleMode.SCALE_WIDTH_HEIGHT)

the following happens in setImageBitmap

3. i then cache the given stream, and decompress the bitmap array into a bitmap using ByteArrayInputStream, and cache that bitmap, and then invalidate my view

the following happens in onDraw

4. i create a new scaled bitmap, and cache the scaled bitmap

5. i then draw the scaled bitmap onto the canvas