[英]How to set stroke color to draw a rectangle on canvas?
I want to draw a round rectangle which its stroke is blue and its fill is red, but I can't find a method in Paint class to set stroke color. 我想绘制一个圆形矩形,其笔划为蓝色,填充为红色,但我在Paint类中找不到设置笔触颜色的方法。 How can I do that? 我怎样才能做到这一点?
mCanvas.drawColor(mBackgroundColor, PorterDuff.Mode.CLEAR);
mCanvas.setDrawFilter(mPaintFlagsDrawFilter);
mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
mPaint.setColor(Color.RED);
mPaint.setStrokeWidth(2);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mRectF.set(0, 0, mWidth, mHeight);
mCanvas.drawRoundRect(mRectF, 10, 10, mPaint);
Paint only allows for one color at a time. 油漆一次只允许一种颜色。
mCanvas.drawColor(mBackgroundColor, PorterDuff.Mode.CLEAR);
mCanvas.setDrawFilter(mPaintFlagsDrawFilter);
mFillPaint.setStyle(Paint.Style.FILL);
mFillPaint.setColor(Color.RED);
mStrokePaint.setStyle(Paint.Style.STROKE);
mStrokePaint.setColor(Color.BLUE);
mStrokePaint.setStrokeWidth(2);
mStrokePaint.setStrokeCap(Paint.Cap.ROUND);
mRectF.set(0, 0, mWidth, mHeight);
mCanvas.drawRoundRect(mRectF, 10, 10, mFillPaint);
mCanvas.drawRoundRect(mRectF, 10, 10, mStrokePaint);
If you find your rounded rectangle doesn't look right, it may be clipped at the bounds of the view. 如果您发现圆角矩形看起来不正确,则可能会在视图的边界处剪切。 Adjust the RectF to allow for half the StrokeWidth: 调整RectF以允许StrokeWidth的一半:
mRectF.set(1, 1, mWidth - 1, mHeight - 1);
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