TextDrawable.java 文件源码

private void drawBorder(Canvas canvas) {
    RectF rect = new RectF(getBounds());
    rect.inset(borderThickness/2, borderThickness/2);

    if (shape instanceof OvalShape) {
        canvas.drawOval(rect, borderPaint);
    }
    else if (shape instanceof RoundRectShape) {
        canvas.drawRoundRect(rect, radius, radius, borderPaint);
    }
    else {
        canvas.drawRect(rect, borderPaint);
    }
}