我试图用Canvas.scale(2f,2f)放大位图,但当我这样做时,图像会消失。
这是我的代码:
int srcLeft = GodFrameWidth * GodCurAnimation;
int srcTop = 0;
int srcRight = (GodFrameWidth * GodCurAnimation) + GodFrameWidth;
int srcBottom = GodFrameHeight;
float destLeft = CanvasWidth/2 - GodFrameWidth;
float destTop = CanvasHeight/2;
float destRight = destLeft + GodFrameWidth;
float destBottom = destTop + GodFrameHeight;
RectF dst = new RectF(destLeft, destTop,destRight ,destBottom );
Rect src = new Rect(srcLeft,srcTop,srcRight,srcBottom);
canvas.save();
canvas.scale(2f, 2f);
canvas.drawBitmap(GodMap, src, dst,Pencil);
canvas.restore();
如果我不缩放它,它就会出现在屏幕中间,我希望它在哪里。
有什么想法吗?
我建议您在缩放画布之前将其转换为轴心。例如:
canvas.save();
canvas.translate(50, 50);
canvas.scale(0.5f, 0.5f);
canvas.drawRect(0.0, 0.0, 5.0, 5.0, paint);
canvas.restore();
这将绘制一个长5.0、宽5.0的矩形,将其长度和宽度缩小到2.5,然后将其移动到(50,50)。代码参考。