如何在Android中添加圆角到画布画？

我在ReplacementSpan的@Override方法中创建一个矩形.如何添加RoundCorner和填充？

码：

@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint) {
    RectF rect = new RectF(x, top, x + measureText(paint, text, start, end), bottom);
    paint.setColor(mBackgroundColor);
    canvas.drawRect(rect, paint);
    paint.setColor(mForegroundColor);
    canvas.drawText(text, start, end, x, y, paint);
}

编辑-1

我正在使用MeasureText：

private float measureText(Paint paint,CharSequence text,int start,int end){
        return paint.measureText(text,start,end);
    }

编辑-2

经过一些建议后我做了这些修改,我可以在Rectangle上看到圆角

@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint) {
    RectF rect = new RectF(x, top, x + measureText(paint, text, start, end), bottom);
    paint.setColor(mBackgroundColor);
    canvas.drawRoundRect(rect, 15,15,paint);
    paint.setColor(mForegroundColor);
    canvas.drawText(text, start, end, x, y, paint);

}

这是截图：

我从以下代码调用draw方法：

int currentIndex = 0;
for (int i = 0; i < words.length - 1; i++) {
            s.setSpan(new CustomDrawble(Color.GRAY, Color.WHITE), currentIndex, currentIndex + words[i].length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            currentIndex += words[i].length() + 1;
        }

解决方法:

Canvas的方法是drawRoundRect.你必须提供要绘制的RectF,Paint,如drawRect和两个加法参数,rx和ry,它们代表圆角的x和y半径.例如.

canvas.drawRoundRect(rect, 5, 5, paint);

将绘制一个圆角为5像素的矩形

EDIT2：

免责声明：使用dip而不是像素

@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint) {
   RectF rect = new RectF(x, top, x + measureText(paint, text, start, end) + 10, bottom);
   paint.setColor(mBackgroundColor);
   canvas.drawRoundRect(rect, 15,15,paint);
   paint.setColor(mForegroundColor);
   canvas.drawText(text, start, end, x + 5, y, paint); 
 }

标签：drawrect,android,canvas
来源： https://codeday.me/bug/20190829/1762500.html