How to create a class common to AppCompatActivity-CodePudding

I am attempting to create a menu bar that lives in all of my activities. To do this, I've extended AppCompatActivity in AppMenu.java file. The idea here is to call my custom AppMenu.getMenu(...) method in every activity.

Unfortunately I can't figure out how to call getMenu in my activities.

AppMenu.java:

public class AppMenu extends AppCompatActivity {
    public void getMenu(BottomNavigationView bottomNavigationView, int selected) {

        // Set Home selected
        bottomNavigationView.setSelectedItemId(selected);

        // Perform item selected listener
        bottomNavigationView.setOnItemSelectedListener(new BottomNavigationView.OnItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {

                switch(item.getItemId())
                {
                    case R.id.messages:
                        startActivity(new Intent(getApplicationContext(), dm.class));
                        overridePendingTransition(0,0);
                        return true;
                    case R.id.home:
                        return true;
                    case R.id.profile:
                        startActivity(new Intent(getApplicationContext(), userProfile.class));
                        overridePendingTransition(0,0);
                        return true;
                }
                return false;
            }
        });
    }
}

MainActivity.java

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // How can I call getMenu?
        AppMenu m = new AppMenu(); // Can not resolve this
        getMenu(); // Can not resolve this either
    }
}

For additional context, I am following this GeeksForGeeks article but I do not think it's a great idea to repeat the same menu code in every activity.

CodePudding user response：

All you have to do is instead of extend AppCompatActivity, extend your AppMenu (I would say this should be called BaseMenuActivity), it would be like this:

public class MainActivity extends AppMenu {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    getMenu()
}

}