Display a Toast Message on Android (using Java)

MainActivity.java

package com.example.toastapp;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        Toast.makeText(getApplicationContext(), "foo", Toast.LENGTH_LONG);
    }
}