<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="wrap_content"
              android:background="@android:color/transparent"
              android:orientation="vertical">

    <View
        android:id="@+id/little_triangle"
        android:layout_width="17dp"
        android:layout_height="8.5dp"
        android:layout_gravity="center_horizontal"
        android:background="@drawable/little_triangle"/>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/bubble"
        app:layoutManager="android.support.v7.widget.LinearLayoutManager"/>

</LinearLayout>