哪一个是更快的颜色过滤或在Android中使用不同的drawable？

Question

i'm using icons on recyclerview row items.And i'm changing icon's colors with Color Filter option in android but i'm wondering which one is faster and better ?

• different colored drawables
• (run-time) color filter on white drawable icon

I already use color filtering on white drawable but it sometimes does not appear in list row till refresh recyclerview so i just think about to use different drawables. thank you for your interest...

Answer 1

It is hard to say, but I would say that changing the drawable is faster, and this is why I think this:

• in order to filter a image the system has to read each pixel from RAM, transform each RGB component in order to add the tint (it's not as simple as adding +3 to the intensity of each pixel), and then write each pixel

• changing the drawable implies reading from the flash memory and load it into ram

The thing is that flash storage on mobile devices is pretty fast too these days so I consider it's faster to load than tint images.

BUT it depends on how you create the layout. If you load a image the Android system will recalculate the whole layout if other elements change position when you change the drawable. I don't think they wrote code to keep the layout the same if the new drawable has the same size as the last one, and this will involve more calculations than a simple tinting.

Answer 2

彩色滤光效果更好，因为它使用GPU（因此速度更快），并且可以降低最终apk的大小，但是有时使用硬件加速器会由于内存泄漏，可绘制的大小，不良的设计和..而使应用程序缓慢而缓慢。 。