浮動動作按鈕不顯示在屏幕的旋轉

Question

我已經添加recyclerview以及浮動動作按鈕，但是當我旋轉屏幕在移動浮動按鈕是不可見的只有recyclerview是visibleHow使它visible.My代碼是如下：

<?xml version="1.0" encoding="utf-8"?> 
 
<android.support.design.widget.CoordinatorLayout 
 
    xmlns:android="http://schemas.android.com/apk/res/android" 
 
    android:layout_width="match_parent" 
 
    android:layout_height="match_parent" 
 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
 
    android:orientation="vertical" 
 
    android:background="#DCDCDC"> 
 

 
    <android.support.v7.widget.RecyclerView 
 
     android:id="@+id/CustomerList" 
 
     android:layout_width="match_parent" 
 
     android:layout_height="wrap_content" 
 
     android:paddingTop="10dp" 
 
     android:layout_weight="1" 
 
     android:layout_marginLeft="20dp" 
 
     android:layout_marginStart="20dp" 
 
     android:layout_marginBottom="20dp" 
 
     android:layout_marginRight="20dp" 
 
     android:layout_marginEnd="20dp" 
 
     android:layout_marginTop="20dp" 
 
     android:background="#FFF" 
 
     /> 
 
    <android.support.design.widget.FloatingActionButton 
 
     android:layout_height="wrap_content" 
 
     android:layout_width="wrap_content" 
 
     android:id="@+id/nextToThird" 
 
     app:backgroundTint="@color/colorgreen" 
 
     android:src="@drawable/right" 
 
     android:layout_marginStart="260dp" 
 
     android:layout_marginLeft="260dp" 
 
     android:layout_marginTop="450dp" 
 
     android:padding="0dp"/> 
 
    
 
</android.support.design.widget.CoordinatorLayout>

Answer 1

使用相對佈局會在這兩個方向橫向和縱向 像這樣工作

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

<android.support.v7.widget.RecyclerView 
    android:id="@+id/CustomerList" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:layout_weight="1" 
    android:background="#FFF" /> 

<android.support.design.widget.FloatingActionButton 
    android:id="@+id/nextToThird" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentBottom="true" 
    android:layout_alignParentRight="true" 
    android:layout_margin="20dp" /> 
</RelativeLayout> 

問我任何查詢的情況下