res/layout/connect.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="5dp" >

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="@string/connect_please"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:contentDescription="@string/adk_description"
        android:src="@drawable/adk_outline" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:text="@string/plug_in_or_use_bluetooth"
         android:textAppearance="?android:attr/textAppearanceLarge" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <Button
        android:id="@+id/connect_bluetooth_button"
        android:layout_width="match_parent"
        android:layout_height="80dip"
        android:layout_margin="25dip"
        android:gravity="center"
        android:text="@string/bluetooth" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

</LinearLayout>