<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:app="http://schemas.android.com/apk/res-auto" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:showIn="@layout/activity_rpc"> <Button android:id="@+id/button_stop_rpc" android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/stop_rpc" /> </LinearLayout>