如何在Canvas Android中缩放位图

Question

I want to diasplay image(bitmap) in SurfaceView using Canvas. My requirement is that size of the canvas greater than image.I need space(eg:10 dp) in each side of the image in Canvas. How I can scale this?

Thanks Mikahail

Answer 1

您可以绘制所需的Canvas大小的矩形，然后使用参数（11，11）绘制图像，这将使它从每个尺寸的角开始绘制10px。

Answer 2

Put this method in your SurfaceView Class :D

 public void draw(Canvas canvas) {
    final float scaleFactoryX = getWidth() / (WIDTH * 1.f);
    final float scaleFactoryY = getHeight() / (HEIGHT * 1.f);
    if (canvas != null) {
        final int savedState = canvas.save();
        canvas.scale(scaleFactoryX, scaleFactoryY);

        canvas.restoreToCount(savedState);
    }

}