android开发中Bitmap与Drawable之间的相互转换

转换Bitmap to Drawable

//pattern 1

BitmapDrawable bitmapDrawable = (BitmapDrawable)bitmap;

Drawable drawable = (Drawable)bitmapDrawable;

//pattern 2

Bitmap bitmap = new Bitmap (...);

Drawable drawable = new BitmapDrawable(bitmap);

转换Drawable to Bitmap

Drawable d = ImagesList,get(0);

Bitmap bitmap = ((BitmapDrawable)d).getBitmap();