Actually, the problem is the icon in the preview. It is showing changes when I change the size, but it is not affecting the icon of my test device. Any help will be appreciated!
Use all these standerd formats and Don't Create 9-patch images for launcher icons .
hdpi=281*164
mdpi=188*110
xhdpi=375*219
xxhdpi=563*329
xxxhdpi=750*438
48 × 48 (mdpi)
72 × 72 (hdpi)
96 × 96 (xhdpi)
144 × 144 (xxhdpi)
192 × 192 (xxxhdpi)
512 × 512 (Google Play store)