sheishuoAPP/uikit/res/layout/nim_picker_album_activity.xml

<?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"
	android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white">

     <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar_layout"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:theme="@style/AppTheme.AppBarOverlay"
        app:elevation="0dp">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
			app:titleTextAppearance="@style/Toolbar.TitleText">

        </android.support.v7.widget.Toolbar>
    </android.support.design.widget.AppBarLayout>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/app_bar_layout"
        android:layout_above="@+id/picker_bottombar">

        <FrameLayout
            android:id="@+id/picker_album_fragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="visible" />

        <FrameLayout
            android:id="@+id/picker_photos_fragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="gone" />
    </FrameLayout >

    <RelativeLayout
	    android:id="@+id/picker_bottombar"
	    android:layout_width="match_parent"
	    android:layout_height="50dp"
	    android:layout_alignParentBottom="true"
	    android:background="#e6e6e6"
	    android:visibility="visible">

		<TextView
            android:id="@+id/picker_bottombar_preview"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:enabled="false"
            android:layout_marginLeft="10dip"
            android:layout_marginRight="10dip"
            android:background="@drawable/nim_picker_preview_btn_selector"
            android:layout_alignParentLeft="true"
            android:layout_centerVertical="true"
            android:paddingLeft="8dip"
            android:paddingRight="8dip"
            android:gravity="center"
            android:text="@string/picker_image_preview"
            android:textColor="@color/color_picker_preview_selector"
            android:textSize="14.0sp"
            android:visibility="visible" />

		<TextView
            android:id="@+id/picker_bottombar_select"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_marginLeft="10dip"
            android:layout_marginRight="10dip"
            android:background="@drawable/nim_message_button_bottom_send_selector"
            android:enabled="false"
            android:gravity="center"
            android:paddingLeft="8dip"
            android:paddingRight="8dip"
            android:text="@string/picker_image_send"
            android:textColor="@color/white"
            android:textSize="14.0sp"
            android:visibility="visible" />
	</RelativeLayout>

</RelativeLayout>