<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:
 
layout_height="match_parent"
    tools:context=".activitys.MainActivity">

    <FrameLayout
        android:id="@+id/main_container_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@id/navigation" //設定在導航欄上面
        
        /
 
>

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="wrap_content"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true" //設定在父元件底部
        android:layout_alignParentStart="true"
        android:
 
background="?android:attr/windowBackground"
        app:menu="@menu/navigation" />

</RelativeLayout>