Invoke Method using Reflection

I've got two classes. I want to invoke the "saveq" method in the QuestionPicker.class. This method saves some Strings into the SharedPreferences. I want to invoke that method from another class, that is called Questions. I want to invoke the method using reflection, but my code doesn't work.. I think the problem is somewhere at the reflection, but I can't see it. Can someone see the problem? Thanks

Here is the QuestionPicker.class

public class QuestionPicker {

    public void saveq() {

        // MyApplication Class calls Context
        Context context = MyApplication.getAppContext();

        // Values to save
        String Q1 = "SomeQuestion";
        String Q2 = "SomeOtherQuestion";
        String Q3 = "AndEvenMoreQuestions";

        // Save the Strings to SharedPreferences
        SharedPreferences.Editor editor = context.getSharedPreferences("QuestionsSaver", 0).edit();

        editor.putString("Q1", Q1);
        editor.putString("Q2", Q2);
        editor.putString("Q3", Q3);

        editor.apply();

    }
}

And here is the Questions.class

public class Questions extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_questions);

        // storing string resources into Array
        String[] subjects = getResources().getStringArray(R.array.subjects);
        ListView lv = (ListView) findViewById(R.id.listView);
        // Binding resources Array to ListAdapter
        ListAdapter adapter = new ArrayAdapter<String>(this, R.layout.list_item, R.id.label, subjects);
        lv.setAdapter(adapter);


        // listening to single list item on click
        lv.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {

          // Invoke the saving Method  
                try {
                    Class cls = Class.forName("com.test.QuestionsPicker");
                    Object obj = cls.newInstance();
                    Method method = cls.getMethod("saveq");
                    method.invoke(obj);

                } catch(Exception ex){
                    ex.printStackTrace();
                }



            }
        });
    }
}