CS_BS/MainActivity.java

package com.example.WhatMeal;

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity
{
    MenuActivity.MyHelper myHelper;
    private TextView text_food;
    private TextView text_store;
    private Button btn_eat;
    private Button btn_menu;
    private Button btn_inter;
    private Button btn_gps;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn_eat=(Button)findViewById(R.id.btn_eat);
        btn_eat.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                Intent intent = new Intent(MainActivity.this, EatWhatActivity.class);
                startActivity(intent);
            }
        });
        btn_menu=(Button)findViewById(R.id.btn_menu);
        btn_menu.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                Intent intent = new Intent(MainActivity.this, MenuActivity.class);
                startActivity(intent);
            }
        });
        btn_inter=(Button)findViewById(R.id.btn_inter);
        btn_inter.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                Intent intent = new Intent(MainActivity.this, InterActivity.class);
                startActivity(intent);
            }
        });
        btn_gps=(Button)findViewById(R.id.btn_gps);
        btn_gps.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                Intent intent = new Intent(MainActivity.this, GPSActivity.class);
                startActivity(intent);
            }
        });
    }
}