我在想，如果有可能之后被加载到内存中，而无需创建一个新的位图绘制位图的只是一部分。我看到绘制对象拥有的setBounds方法，但林不知道，如果只绘制设置的区域或只是重新调整整个图像。谢谢你。

I was wondering if it is possible to draw only a portion of a bitmap after it is loaded into memory without creating a new Bitmap. I see Drawable has a setBounds method but im not sure if it only draws the area set or just resizes the entire image. Thank you.

推荐答案

假设你有一个主要的帆布画，你可以使用Canvas类的drawBitmap方法之一绘制装载位图的一个子集。

Assuming you have a main canvas to draw to, you can use one of the drawBitmap methods of the Canvas class to draw a subset of the loaded bitmap.

public无效drawBitmap（位图位图，矩形SRC，矩形DST，油漆涂​​料）