关于ALPHA_8,ARGB_4444,ARGB_8888,RGB_565的互相转换问题？

Question

src是RGB_565
Bitmap oldBitmap=src.copy(ALPHA_8,true);
Canvas canvas = new Canvas(oldBitmap);
canvas.clipPath(path);
canvas.drawBitmap(src,0,0,null);
Bitmap newBitmap=Bitmap.createBitmap(width,height,ALPHA_8);
canvas.setBitmap(newBitmap);
canvas.drawBitmap(oldBitmap,new Rect(x,y,x+width,y+height),new Rect(0,0,width,height),null);

Answer 1

RGB565是不包含alpha通道的，
ALPHA8是只包含alpha通道的，
这两个格式之间转换，那不成了空图片了么