<?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/main_content" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" android:clipToPadding="true" tools:context=".Activity_ChgSource"> <android.support.design.widget.AppBarLayout android:id="@+id/appbar" style="@style/barLayout"> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="@dimen/toolbarHeight" android:background="?attr/colorPrimary" app:popupTheme="@style/ToolBarTheme.PopupOverlay"> </android.support.v7.widget.Toolbar> </android.support.design.widget.AppBarLayout> <android.support.v7.widget.RecyclerView android:id="@+id/recycleView" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginTop="50dp" android:divider="@color/list_item_divider" > </android.support.v7.widget.RecyclerView> </android.support.design.widget.CoordinatorLayout>