When you build your app in Android, you must respect the following icon size:
drawable-ldpi 120dpi 36px x 36px
drawable-mdpi 160dpi 1x 48px x 48px
drawable-hdpi 240dpi 1.5x 72px x 72px
drawable-xhdpi 320dpi 2 96px x 96px
drawable-xxhdpi 480dpi 3x 144px x 144px
drawable-xxxhdpi 640dpi 4x 192px x 192px
