Android BitmapとDrawableの切り替え

Bitmap to Drawableの変換

BitmapDrawable bitmapDrawable = (BitmapDrawable)bitmap;   
Drawable drawable = (Drawable)bitmapDrawable;   
  
  
Bitmap bitmap = new Bitmap (...);   
Drawable drawable = new BitmapDrawable(bitmap);

Drawable to Bitmapの変換

Drawable mydDrawable = getBackground();
Bitmap image = ((BitmapDrawable)mydDrawable).getBitmap();