android - Uneven line width in drawn stroke rectangle -

i need draw stroke rectangle rounded corners. here code:

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); 

but can see line width bigger in corners... idea why happens , how fix this?

here screen

try set of code it's working.

    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);