绘制的笔划矩形中的线宽不均匀

Question

我需要绘制带圆角的描边矩形。这是我的代码：

mLinePaint = new Paint();
mLinePaint.setColor(mDotColorTouched);
mLinePaint.setAntiAlias(true);
mLinePaint.setStrokeWidth(mLineWidth);
mLinePaint.setStyle(Paint.Style.STROKE);
mLinePaint.setStrokeCap(Paint.Cap.ROUND);

    bitmap = Bitmap.createBitmap(300, 
300, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(bitmap);
    RectF r = new RectF(0, 0, 300 , 300);
    c.drawRoundRect(r, 30, 30, mLinePaint);

但是正如您所见，角落处的线宽更大... 知道为什么会发生这种情况以及如何解决这个问题吗？

这是屏幕

Answer 1

试试这组有效的代码。

    Paint paint = new Paint();
    paint.setStyle(Paint.Style.STROKE);
    paint.setColor(Color.BLUE);
    paint.setStrokeWidth(10);

    Bitmap b = Bitmap.createBitmap(300, 300, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(b);
    RectF rectF = new RectF();
    rectF.set(5,5,250,250);
    c.drawRoundRect(rectF, 10, 10, paint);

    imgView.setImageBitmap(b);

绘制的笔划矩形中的线宽不均匀

Uneven line width in drawn stroke rectangle

android

paint

draw

android-canvas