Pixel Art Desinger is one of the best pixel art creator for Android! Using the super-easy to use interface you can draw, erase, zoom, and drag to create beautiful Pixel Art Style Graphics in lovely 8 bit retro look.
The Pencil tool can draw lines, and the eraser can remove them. The shapes tool allows you to use a paint bucket, rectangle, line and circle tools. Easy two finger drag and zoom anywhere to navigate large images.
You can always undo/redo action
There's a full undo/redo history, as well as a color picker with history for hsv, rgb, and hex codes.