위치를 바꾸고자 하는 뷰를 removeView 한다음
넣고 싶은 위치로 addView(child, index) 하시면 될 듯 싶은데요.
Adds a child view. If no layout parameters are already set on the child, the default parameters for this ViewGroup are set on the child.
Note: do not invoke this method from draw(android.graphics.Canvas), onDraw(android.graphics.Canvas), dispatchDraw(android.graphics.Canvas) or any related method.
draw(android.graphics.Canvas)
onDraw(android.graphics.Canvas)
dispatchDraw(android.graphics.Canvas)
generateDefaultLayoutParams()