材料设计支持库Design Support Library的使用
Design Support Library是Google在2015年的IO大会上发布的全新Material Design支持库，在这个support库里面主要包含了 8 个新的 Material Design组件，最低支持 Android 2.1。
| Widget Name | Description |
|---|---|
| TextInputLayout | EditText辅助控件 |
| FloatingActionButton | MD风格的圆形按钮 |
| Snackbar | 提示框 |
| TabLayout | 选项卡 |
| NavigationView | DrawerLayout的侧滑界面 |
| CoordinatorLayout | 超级FrameLayout |
| AppBarLayout | MD风格的滑动Layout |
| CollapsingToolbarLayout | 可折叠的MD风格ToolbarLayout |
| 以下为 V28 新增组件 | |
| MaterialButton | Material风格的Button |
| Chip & ChipGroup | 关键字标签组件 |
| MaterialCardView | Material风格的CardView |
| BottomAppBar | 底部标题栏 |
在app根目录的buil.gradle文件中加入依赖：
implementation 'com.android.support:recyclerview-v7:28.0.0-alpha3'
FrameLayout布局的增强版—CoordinatorLayout
可折叠的Toolbar——CollapsingToolbarLayout
Android Design Support Library v28 新增组件详解
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