Myujth

I have created simple custom view that i extend from RelativeLayout

I have created this shape:

 firstPoint.set(0,100);
 secondPoint.set(getWidth(),100);
 thirdPoint.set(getWidth(),getHeight());
 fourthPoint.set(0,getHeight());

 mFirstCurveStartPoint.set((getWidth() / 5) * 4 , 100);
 mFirstCurveEndPoint.set((getWidth() /6) * 5, 0);

 mFirstCurveControlPoint1.set(mFirstCurveStartPoint.x + 100 , mFirstCurveStartPoint.y);
 mFirstCurveControlPoint2.set(mFirstCurveEndPoint.x -100 , mFirstCurveEndPoint.y);

I want to be curve red line that i mentioned on image but my code curve section is mistake and i can not choose right number to create right curve..I think this values is wrong:

 mFirstCurveControlPoint1.set(mFirstCurveStartPoint.x + 100 , mFirstCurveStartPoint.y);
 mFirstCurveControlPoint2.set(mFirstCurveEndPoint.x -100 , mFirstCurveEndPoint.y);

This is ondraw method:

@Override
protected void onDraw(Canvas canvas) 
 super.onDraw(canvas);
 mPath.lineTo(firstPoint.x,firstPoint.y);
 mPath.lineTo(mFirstCurveStartPoint.x,mFirstCurveStartPoint.y);
 mPath.lineTo(mFirstCurveEndPoint.x,mFirstCurveEndPoint.y);

 mPath.cubicTo(mFirstCurveControlPoint1.x, mFirstCurveControlPoint1.y,
 mFirstCurveControlPoint2.x, mFirstCurveControlPoint2.y,
 mFirstCurveEndPoint.x, mFirstCurveEndPoint.y);

 mPath.lineTo(thirdPoint.x,thirdPoint.y);
 mPath.lineTo(fourthPoint.x,fourthPoint.y);
 mPath.close();
 canvas.drawPath(mPath,mPaint);