The difference between Bitmap and drawable

Bitmap-called bitmaps, the general bitmap file format suffix bmp, of course, there are many encoders such as RGB565, RGB888. As a per-pixel display object, the execution efficiency is high, but the disadvantage is obvious that the storage efficiency is low. We understand that it's better to have a storage object.
Drawable-as a generic graphic object for Android, it can load images in commonly used formats, such as GIF, PNG, JPG, and of course, BMP, and of course some advanced visualizations, such as gradients, graphics, etc.
So bitmap is also the Drawable object.

Bitmap Turn drawable:

drawable drawable = new bitmapdrawable (bitmap);

The difference between Bitmap and drawable