private void initAvailablePosition()
    {
        mAvailablePos.clear();
        MetroBlock first = new MetroBlock();
        first.left = getPaddingLeft();
        first.top = getPaddingTop();
        first.width = getMeasuredWidth();
        mAvailablePos.add(first);
    }
Created by zhy on 15/12/10.

//do not use
autolayout/src/main/java/com/zhy/autolayout/widget/MetroLayout.java