UABAndroidExamples/BluetoothConnect/res/layout/activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="${relativePackage}.${activityClass}" >

    <Button
        android:id="@+id/deviceDiscoveryBt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:text="@string/discover"
        android:enabled="false" />

    <ProgressBar
        android:id="@+id/progressBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:indeterminate="true"
        android:visibility="invisible" />

    <TextView
        android:id="@+id/statusTv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/progressBar"
        android:layout_alignParentLeft="true"
        android:layout_toLeftOf="@+id/progressBar"
        android:layout_marginLeft="10dp"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/bluetoothDataTv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/statusTv"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/statusTv"
        android:layout_marginLeft="15dp"
        android:layout_marginTop="136dp"
        android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>