如何使用画布绘制带角半径框的线

Question

我想用盒子角半径绘制盒子线。

预期输出

但是我得到了什么

代码

@Override
    protected void onDraw(Canvas canvas) {
        if (bytes != null) {
            int[] gradientColors = new int[]{
                    Color.parseColor("#B3F90403"),
                    Color.parseColor("#B3E7D104"),
                    Color.parseColor("#B317A300")
            };

            float[] gradientColorPos = new float[]{
                    0.33f, 0.66f, 0.99f
            };

            paint.setShader(new LinearGradient(0, 0, 0f, getHeight() / 2, gradientColors, gradientColorPos, Shader.TileMode.MIRROR));


            float barWidth = getWidth() / density;
            float div = bytes.length / density;
            paint.setStrokeWidth(barWidth - gap);
            for (int i = 0; i < density; i++) {
                int count = 0;
                int bytePosition = (int) Math.ceil(i * div);
                int top = getHeight() + ((byte) (Math.abs(bytes[bytePosition]) + 128)) * getHeight() / 128;
                int col = Math.abs((getHeight() - top));
                for (int j = 0; j < col + 1; j += barWidth) {
                    float barX = (i * barWidth) + (barWidth / 2);
                    float y1 = getHeight() - ((barWidth + (gap / 2f)) * count);
                    float y2 = getHeight() - ((barWidth - gap / 2f) + ((barWidth + gap / 2f) * count));
                    canvas.drawLine(barX, y1, barX, y2, paint);
                    count++;
                }
            }
            super.onDraw(canvas);
        }
    }