Understanding of config.argb_8888, Config.alpha_8, config.argb_4444, config.rgb_565

A: Transparency

R: Red

G: Green

B: Blue

Bitmap.config argb_4444: Four bits per pixel, which is a=4,r=4,g=4,b=4, then one pixel takes up 4+4+4+4=16 bit.

Bitmap.config argb_8888: Four bits per pixel, which is a=8,r=8,g=8,b=8, then one pixel takes up 8+8+8+8=32 bit.

Bitmap.config rgb_565: Four bits per pixel, i.e. r=5,g=6,b=5, no transparency, then one pixel occupies 5+6+5=16 bit

Bitmap.config Alpha_8: Four bits per pixel, only transparency, no color.

In general, we are using the argb_8888, so that it is the most memory, because one pixel accounted for 32 bits, 8 bits = 1 bytes, so a pixel accounted for 4 bytes of memory. Suppose there is a picture of 480x800, and if the format is argb_8888, it will consume 1500KB of memory.

Understanding of config.argb_8888, Config.alpha_8, config.argb_4444, config.rgb_565