Not able to add empty view below Recyclerview

问题

I was trying my hand with recyclerview and floating action button for an app. The problem I encountered is that the floating action button hinders with the buttons in recyclerview. I looked up how the android apps such as phone app(one where you have contacts displayed in gridvew) are designed to deal with this, I see that there is empty space left in the bottom which gives space between recyclerview and floating action button, user just needs to scroll to the bottom to avoid the overlap. I tried to add a view after recyclerview but not its not getting displayed, also this view should move along with the recyclerview rows. What am I missing to show a view in the end of the recyclerview. My layout file:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="#6fbababa">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/my_recycler_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scrollbars="vertical"/>

    <ImageButton
        android:id="@+id/button_floating_action"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:src="@drawable/ic_fab"
        android:background="@null"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="12dp"
        android:layout_marginEnd="12dp"
        android:layout_marginRight="12dp"
        android:elevation="2dp"/>

    <View
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:layout_below="@id/my_recycler_view"
        android:background="@color/white"/>

</RelativeLayout>

Update: Modified the layout code to make it work.

<android.support.v7.widget.RecyclerView 
android:id="@+id/my_recycler_view" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:clipToPadding="false" 
android:paddingBottom="30dp" 
android:scrollbars="vertical"/>

回答1:

Add bottom padding to the RecyclerView. Also, don't use android:layout_height="wrap_content" unless you've overridden onMeasure in the layout manager. Current layout managers do not yet support wrap content.

Add the attribute android:clipToPadding="false" to achieve the goal. As mentioned in comments.

回答2:

Here's an example (in this case a listView, but could be anything) underneath a recycler view that takes up the rest of the parent's height. Note layout_alignParentBottom and layout_above attributes.

<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<ListView
    android:id="@+id/list_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:scrollbars="none"
    **android:layout_alignParentBottom="true"**
    />

<android.support.v7.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scrollbars="vertical"
    android:layout_above="@+id/list_view"
    />

回答3:

I have created an utility method for that so you can add padding easily

public void addLastChildPadding(RecyclerView.ViewHolder holder,int padding,int recyclerListSize,int position){

if(recyclerListSize-1==position){
holder.itemView.setPadding(0,0,0,padding);
}
}

回答4:

Try this at once

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">


<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.RecyclerView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:clipToPadding="false">

        </android.support.v7.widget.RecyclerView>
    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="15dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:orientation="horizontal">

            <android.support.v7.widget.AppCompatButton
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginRight="15dp"
                android:layout_weight="1"
                android:background="@drawable/button_primary_color_border"
                android:text="70%"
                android:textColor="@android:color/darker_gray"
                android:textSize="20sp" />

            <android.support.v7.widget.AppCompatButton
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginRight="15dp"
                android:layout_weight="1"
                android:background="@drawable/button_primary_color_border"
                android:text="60%"
                android:textColor="@android:color/darker_gray"
                android:textSize="20sp" />
        </LinearLayout>
    </RelativeLayout>

</RelativeLayout>
</LinearLayout>

</LinearLayout>

Remove images and other string according to your uses.

来源：https://stackoverflow.com/questions/27768495/not-able-to-add-empty-view-below-recyclerview