BottomNavigationView使用

1. 设置显示模式
   app:labelVisibilityMode="labeled" |selected|unselected|auto

2. 设置字体颜色
   app:itemTextColor="@drawable/sel_text_color_select"

   <selector xmlns:android="http://schemas.android.com/apk/res/android">
       <item android:color="@color/black" android:state_selected="true"/>
       <item android:color="@color/gray_999999"/>
   selector>
   

3. 设置按钮
   app:menu="@menu/main_bottom_tab"
   图片选择会失效,需要加上:

   mNavView.setItemIconTintList(null);
   

   <menu xmlns:android="http://schemas.android.com/apk/res/android">
       <item
           android:id="@+id/main_photo"
           android:icon="@drawable/sel_bottom_photo"
           android:title="照片"/>
   menu>
   

4. 设置文字字体大小

       <dimen name="design_bottom_navigation_text_size" tools:override="true">10spdimen>
       <dimen name="design_bottom_navigation_active_text_size" tools:override="true">10spdimen>
   

5. 设置图标距离顶部的距离

   <dimen name="design_bottom_navigation_margin" tools:override="true">10dpdimen>
   

6. 事件监听

   mNavView.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);