在具有自定义形状的画布上绘制位图 [英] Draw an bitmap on a canvas with a custom shape

问题描述

我想在画布上绘制以下形状的图像:

I want to draw an image with the following shape on a canvas:

黑色必须替换为我的图像.我目前将图像整体绘制.我只是不知道如何获得这种形状?

The black must be replaced by my image. I currently draw the image as a whole. I just don't know how I can get that sort of shape in it?

    canvas.drawBitmap(header,0,0,mPaint);

有人可以帮助我吗?

推荐答案

感谢pskink我已经知道了:

Thanks to pskink I've got it:

int width = this.getMeasuredWidth();
int height = this.getMeasuredHeight();

BitmapShader shader;
shader = new BitmapShader(header, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);

mPaint.setShader(shader);

Path path = new Path();

path.moveTo(0,0);
path.lineTo(0,height/2);
path.lineTo(width,height/4);
path.lineTo(width,0);

canvas.drawPath(path,mPaint);

只需使用着色器和路径即可完成工作.

Just use a shader and a path to do the job.

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