@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater menuInflater = getMenuInflater();

        menuInflater.inflate(R.menu.main_menu, menu);


        return super.onCreateOptionsMenu(menu);
    }
////////////////////////////
    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        super.onOptionsItemSelected(item);
        switch (item.getItemId()){
            case R.id.app_bar_search:
                System.out.println("done");
                return true;
        }
        return true;
    }


///////////////////


SharedPreferences sharedPreferences = getSharedPreferences("com.example.sharedpreferences", Context.MODE_PRIVATE);
///

        try {
            sharedPreferences.edit().putString("name", ObjectSerializer.serialize("String")).apply();
        } catch (IOException e) {
            e.printStackTrace();
        }
////
        String getString = null;
        try {
            getString = (String) ObjectSerializer.deserialize(sharedPreferences.getString("name", "null"));
        } catch (IOException e) {
            e.printStackTrace();
        }