Question: I want to achieve something you can see in the Android BlueTooth settings: two listviews and one activity. First listview contains already paired devices, second - newly discovered (this one doesn't have fixed size). How can I develop activity like this? Putting listviews in scrollview isn't very good idea as far as I know. So, what would you recommend?

Answer: 
I think you do not need two ListViews at all. You need to implement one ListView with headers as described [here](https://stackoverflow.com/questions/13590627/android-listview-headers).

```
public class MainActivity extends ListActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        List<Item> items = new ArrayList<Item>();
        items.add(new Header("Header 1"));
        items.add(new ListItem("Text 1", "Rabble rabble"));
        items.add(new ListItem("Text 2", "Rabble rabble"));
        items.add(new ListItem("Text 3", "Rabble rabble"));
        items.add(new ListItem("Text 4", "Rabble rabble"));
        items.add(new Header("Header 2"));
        items.add(new ListItem("Text 5", "Rabble rabble"));
        items.add(new ListItem("Text 6", "Rabble rabble"));
        items.add(new ListItem("Text 7", "Rabble rabble"));
        items.add(new ListItem("Text 8", "Rabble rabble"));

        TwoTextArrayAdapter adapter = new TwoTextArrayAdapter(this, items);
        setListAdapter(adapter);
    }

}

```
Why don't you just put the two ListViews in LinearLayout

```
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:weightSum="2">

<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/listview1"
    android:layout_width="0dp"
    android:layout_height="wrap_content" 
    android:layout_weight="1"
/>

<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/listview2"
    android:layout_width="0dp"
    android:layout_height="wrap_content" 
    android:layout_weight="1"
/>
</LinearLayout>

```