DefaultScanCursorView.java 文件源码

protected void drawCorners(Canvas canvas, Rect rect) {

        canvas.drawBitmap(mCorner1, rect.left, rect.top, null);
        canvas.drawBitmap(mCorner2, rect.right - mCorner2.getWidth(), rect.top, null);
        canvas.drawBitmap(mCorner3, rect.left, rect.bottom - mCorner3.getHeight(), null);
        canvas.drawBitmap(mCorner4, rect.right - mCorner4.getWidth(),
                rect.bottom - mCorner4.getHeight(), null);

    }