yinmeng-android/nim_uikit/res/layout/nim_chat_room_message_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:id="@+id/messageActivityLayout"
                xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@color/color_message_default_bg">

    <LinearLayout
        android:id="@+id/messageActivityBottomLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:orientation="vertical">

        <include layout="@layout/nim_message_activity_text_layout"/>

        <com.netease.nim.uikit.business.session.emoji.EmoticonPickerView
            android:id="@+id/emoticon_picker_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:visibility="gone"/>
    </LinearLayout>

    <FrameLayout
        android:id="@+id/message_activity_list_view_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@id/messageActivityBottomLayout">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/messageListView"
            style="@style/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            />

        <FrameLayout
            android:id="@+id/layoutPlayAudio"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:background="@drawable/nim_dialog_toast_bg"
            android:visibility="gone">

            <Chronometer
                android:id="@+id/timer"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="@string/timer_default"
                android:textColor="@color/white"
                android:textSize="45sp"/>

            <LinearLayout
                android:id="@+id/timer_tip_container"
                android:layout_width="188dp"
                android:layout_height="40dp"
                android:layout_gravity="bottom"
                android:gravity="center">

                <TextView
                    android:id="@+id/timer_tip"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:text="@string/recording_cancel"
                    android:textColor="@color/white"
                    android:textSize="20sp"/>
            </LinearLayout>
        </FrameLayout>
    </FrameLayout>
</RelativeLayout>