sheishuoAPP/app/res/layout/recent_contacts_list_activity.xml

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