Android - how to auto scroll textView to align with editText position?

I am trying to create a notepad with the line number. I am able to display lineNumber but the problem is that as soon as editext reaches the end of the screen textview is not getting auto-scroll with editext current position or lineNumber.

Here is XML Code

<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">

<TextView
    android:id="@+id/lineNumber"
    android:layout_width="40dp"
    android:layout_height="match_parent"
    android:background="#eee"
    android:gravity="center_horizontal"
    android:padding="10dp"
    android:text="1"
    android:textSize="18sp"
    tools:layout_editor_absoluteY="12dp"
    />

<EditText
    android:id="@+id/fileText"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_toEndOf="@+id/lineNumber"
    android:ems="10"
    android:padding="10dp"
    android:gravity="left|top"
    android:inputType="textMultiLine"
    android:scrollbars="vertical"/>
</RelativeLayout>

Here is Fragment Code

public class FileViewFragment extends Fragment {

TextView lineNumber;
EditText fileText;
String fileName = "";

@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_file_viewer, container, false);
    lineNumber = view.findViewById(R.id.lineNumber);
    fileText = view.findViewById(R.id.fileText);

    fileText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            int lines = fileText.getLineCount();
            String linesNumber = "";
            for (int i = 1; i <= lines; i++) {
                linesNumber = linesNumber + i + "\n";
            }
            lineNumber.setText(linesNumber);

        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });
      return view;
    }
}

So, how can I auto-scroll textview with editext position?

from Android - how to auto scroll textView to align with editText position?