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android:layout_height="fill_parent"
android:background="#ff00"
android:text="Connect to the server"/>
</LinearLayout>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.4">
</LinearLayout>
</LinearLayout>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
< a n d r o i d . s u p p o r t . d e s i g n . w i d g e t . C o o r d i n a t o r L a y o u t
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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="kr.icehs.intec.mtc.MainActivity">

<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">

<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<android.support.design.widget.FloatingActionButton
android:visibility="gone"
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
app:srcCompat="@android:drawable/ic_dialog_alert" />
<include layout="@layout/content_main" />

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