Android Studio – How to get input from EditText in android java fragment

I am trying to get user input using EditText from fragment after pressing a button. For some reason the button is clickable but no data from EditText.

<EditText
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/txtUserInput"/>

<androidx.appcompat.widget.AppCompatButton
            android:id="@+id/btnTest"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="24dp"/>

public class MainActivity extends AppCompatActivity {

    TestFragment testFragment = new TestFragment();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        getSupportFragmentManager()
            .beginTransaction()
            .replace(R.id.container, testFragment)
            .commit();
        
    }
 }

public class TestFragment extends Fragment {

Button btnTest;
EditText txtUserInput;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_test, container, false);
    
    btnTest = view.findViewById(R.id.btnTest);
    txtUserInput = view.findViewById(R.id.txtUserInput);
    String input = txtUserInput.getText().toString();

    btnTest.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getActivity(), input, Toast.LENGTH_LONG).show();
        }
    });

    return view;
}

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
}

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
}