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android studio中创建activity的布局为什么直接生成布局constraintlayout

2025-04-02 02:14:27

推荐回答（1个）

回答1：

ConstraintLayout约束布局的含义: 根据布局中的其他元素或视图, 确定View在屏幕中的位置. 包含三个重要信息, 根据其他视图设置位置, 根据父容器设置位置, 根据基准线设置位置.
layout_constraint[本源]_[目标]="[目标ID]"

例如:
app:layout_constraintBottom_toBottomOf="@+id/constraintLayout"

约束当前View的底部至目标View的底部, 目标View是constraintLayout. 表明, 把当前View放置到constraintLayout(父容器)的底部, 并且底部一致.
为了演示多个示例, 使用复用的Activity页面. 根据参数设置标题和布局Id.

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