SelectedProductFragment.java

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package com.example.food_front;
 
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
 
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;

public class SelectedProductFragment extends Fragment {
 
    public SelectedProductFragment() {
        // Required empty public constructor
    }
 
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_selected_product, container, false);
 
        Button button = view.findViewById(R.id.addButton);
 
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                replaceFragment(new CartFragment());  // Replace with another fragment
            }
        });
 
        return view;
    }
 
    private void replaceFragment(Fragment newFragment) {
        // Get the FragmentManager and start a transaction
 
        FragmentManager fragmentManager = requireActivity().getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.fragment_container_view, newFragment);
        fragmentTransaction.addToBackStack(null);
        fragmentTransaction.commit();
    }
}