代码设置view布局

以相对布局为例

1. 创建约束

// 设置约束
            RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
            layoutParams.width = childrenSize;
            layoutParams.height = childrenSize;
            layoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

2. 添加约束

            childrenView.setLayoutParams(layoutParams);

3. 添加相对约束的时候注意：

// 代码创建的view是getId默认的-1，需要调用setId 才会使得约束成立
               beforeView.setId(111000+i);
                layoutParams.addRule(RelativeLayout.BELOW,beforeView.getId());