How to not display all list elements at one time in android?

Question

I have a listview in Fragment, which includes some list elements.

Here is the xml-layout:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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=".uiFragments.WikiFragment">

    <LinearLayout
        android:id="@+id/tablayout"
        android:layout_below="@+id/wiki_linear_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

    <ListView
        android:id="@+id/list"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:layout_marginTop="5dp"/>

    <com.github.barteksc.pdfviewer.PDFView
        android:id="@+id/pdfView"
        android:layout_below="@+id/tv_header"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="5dp"/>

    </LinearLayout>

</FrameLayout>

here is a part of the code from this fragment:

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.fragment_wiki, container, false);

        //ListView
        listView = (ListView) view.findViewById(R.id.list);

        // Defined Array values to show in ListView
        String[] values = new String[] { "Android List View",
                "Adapter implementation",
                "Simple List View In Android",
                "Create List View Android",
        };

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),
                android.R.layout.simple_list_item_1, android.R.id.text1, values);

        // Assign adapter to ListView
        listView.setAdapter(adapter);

        // ListView Item Click Listener
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {

                // ListView Clicked item index
                int itemPosition     = position;

                // ListView Clicked item value
                String  itemValue    = (String) listView.getItemAtPosition(position);

                // Show Alert
                Toast.makeText(getContext().getApplicationContext(),
                        "Position :"+itemPosition+"  ListItem : " +itemValue , Toast.LENGTH_LONG)
                        .show();

            }

return view;
        });

What I would like to have is like in the picture:

At the moment, all my list-items will be displayed. But I want to display for example only 2 list-items and the rest shall be scrollable choosen, like in the image above.

This is what I get now.

If someone could me help out, I would be very happy. Thanks