Drawable bitmap byte陣列互相轉換

Drawable轉bitmap

Drawable oDrawable = xxx; //xxx根據自己的情況獲取drawable
BitmapDrawable BD = (BitmapDrawable) oDrawable;
Bitmap BM = BD.getBitmap();

Bitmap轉byte陣列

Bitmap newbm;
 
// 把 bitmap 轉成 byte
ByteArrayOutputStream stream = new ByteArrayOutputStream();
newbm.compress(Bitmap.CompressFormat.JPEG, 100, stream );
byte bytes[] = stream.toByteArray();

byte陣列轉Bitmap

Bitmap geticon
byte[] data
geticon = BitmapFactory.decodeByteArray(data, 0, len);

Bitmap轉Drawable

Drawable showicon = new BitmapDrawable(geticon);