更新时间:2023-01-23 10:07:07
建议取决于您要尝试做什么.
Advice depends upon what you are trying to do.
如果您担心您的控件需要很长时间来绘制,并且您想绘制到位图以便您可以对位图进行 blit 而不是通过画布重新绘制,那么您不要em> 希望对平台进行双重猜测 - 控件自动将其绘图缓存到临时位图,甚至可以使用 getDrawingCache()
If you are concerned that your controls take a long time to draw, and you want to draw to a bitmap so you can blit the bitmap rather than re-drawing via a canvas, then you don't want to be double-guessing the platform - controls automatically cache their drawing to temporary bitmaps, and these can even be fetched from the control using getDrawingCache()
如果你想使用画布绘制位图,通常的方法是:
If you want to draw using a canvas to a bitmap, the usual recipe is:
Bitmap.createBitmap()
Canvas(Bitmap)
构造函数