There are no errors in the java, but when I try to run my code in my phone (I had to run it in my phone because my Android Studio is so slow) it’s crashing. I will provide some of my codes in my java.

package com.vlsqz.activity2;

import android.content.Intent;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private Spinner spinner;

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

        spinner = findViewById(R.id.spinner);

        // Populate spinner with options (Samsung and Apple)
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
                R.array.spinner_items, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);

        // Handle continue button click
        findViewById(R.id.continue_button).setOnClickListener(view -> {
            String selectedItem = spinner.getSelectedItem().toString();

            Intent intent = new Intent(MainActivity.this, layout_2.class);
            intent.putExtra("selectedItem", selectedItem);
            startActivity(intent);
        });
    }
}

package com.vlsqz.activity2;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;

public class layout_2 extends AppCompatActivity {

    private GridLayout gridLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_2);

        // Retrieve selected item from Intent extras
        String selectedItem = getIntent().getStringExtra("selectedItem");

        // Log the selectedItem to see if it's received correctly
        Log.d("Layout_2", "Selected Item: " + selectedItem);

        // Initialize GridLayout
        gridLayout = findViewById(R.id.grid_layout);

        // Check if gridLayout is null
        if(gridLayout == null) {
            Log.e("Layout_2", "GridLayout is null");
            return;
        }

        // Populate GridLayout based on the selected item
        if (selectedItem.equals("Samsung")) {
            addProducts(getSamsungProducts());
        } else {
            // If selectedItem is not "Samsung", handle it accordingly
            // For example, you can display a message or do nothing
            Log.e("Layout_2", "Invalid selected item: " + selectedItem);
        }
    }



    private void addProducts(Product[] products) {
        for (int i = 0; i < products.length; i++) {
            // Find the IDs dynamically based on the item index
            int itemId = getResources().getIdentifier("item" + (i + 1) + "_layout", "id", getPackageName());
            GridLayout itemLayout = gridLayout.findViewById(itemId);

            // Find other view IDs within the item layout
            ImageView imageView = itemLayout.findViewById(getResources().getIdentifier("image" + (i + 1), "id", getPackageName()));
            TextView nameTextView = itemLayout.findViewById(getResources().getIdentifier("itemName" + (i + 1), "id", getPackageName()));
            TextView priceTextView = itemLayout.findViewById(getResources().getIdentifier("itemPrice" + (i + 1), "id", getPackageName()));
            EditText qtyEditText = itemLayout.findViewById(getResources().getIdentifier("editQty" + (i + 1), "id", getPackageName()));
            Button decButton = itemLayout.findViewById(getResources().getIdentifier("dec" + (i + 1), "id", getPackageName()));
            Button incButton = itemLayout.findViewById(getResources().getIdentifier("inc" + (i + 1), "id", getPackageName()));
            Button addButton = itemLayout.findViewById(getResources().getIdentifier("add" + (i + 1), "id", getPackageName()));

            // Set product data to views
            imageView.setImageResource(products[i].getImageResId());
            nameTextView.setText(products[i].getName());
            priceTextView.setText(products[i].getPrice());
            qtyEditText.setText("1"); // Assuming default quantity is 1

            // Add click listeners to buttons if needed

            // Add the item layout to the GridLayout
            gridLayout.addView(itemLayout);
        }
    }

    // Dummy method to get Samsung products
    private Product[] getSamsungProducts() {
        return new Product[]{
                new Product(R.drawable.galaxy_s24_ultra, "Galaxy S24 Ultra", "₱87,990.00"),
                new Product(R.drawable.galaxy_tab_s9, "Galaxy Tab S9 Ultra 5G", "₱85,990.00"),
                new Product(R.drawable.galaxy_watch_6, "Galaxy Watch 6", "₱18,990.00"),
                new Product(R.drawable.galaxy_buds, "Galaxy Buds 2 Pro", "₱12,990.00"),
                // Add more Samsung products as needed
        };
    }

    // Dummy method to get Apple products
    private Product[] getAppleProducts() {
        return new Product[]{
                new Product(R.drawable.macbook_pro, "MacBook Pro", "₱104,990.00"),
                new Product(R.drawable.iphone_15_pro, "iPhone 15 Pro Max", "₱70,990.00"),
                new Product(R.drawable.ipad_pro, "iPad Pro", "₱55,990"),
                new Product(R.drawable.apple_watch, "Apple Watch Ultra 2", "₱54,990.00"),
                // Add more Apple products as needed
        };
    }
}

I want to display all the items inside the layout_2.xml and want to run it, but it keeps crashing as I clicked Continue button layout_2.xml