Removing fragments from an activity

Question

FragmantClass rSum = new FragmantClass();
getSupportFragmentManager().beginTransaction().remove(rSum).commit();       

I am trying to remove this fragm

Answer 1

In my personal case, I add and remove fragment this way:

 if(getSupportFragmentManager().findFragmentById(R.id.container) != null) {
        getSupportFragmentManager()
                .beginTransaction().
                remove(getSupportFragmentManager().findFragmentById(R.id.container)).commit();
    }
    getSupportFragmentManager()
            .beginTransaction()
            .replace(R.id.container, fragment)
            .commit();