hostage/res/layout/activity_playground.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/buttonBluetooth"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="startBluetooth"
            android:text="Bluetooth" />
        
        <Button
            android:id="@+id/buttonNFC"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="startNFC"
            android:text="NFC" />
        
        <Button
            android:id="@+id/buttonServer"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="startServer"
            android:text="Server" />
        

        

    </LinearLayout>

    <Button
        android:id="@+id/buttonCreateNetwork"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="createNetworkData"
        android:text="Create Network Data" />

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView" />
         
    </ScrollView>

</LinearLayout>