Untitled

package com.example.todolist;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    private EditText editTextTask;
    private Button buttonAdd;
    private ListView listViewTasks;
    private ToDoAdapter adapter;
    private ArrayList<ToDoItem> taskList;

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

        editTextTask = findViewById(R.id.editTextTask);
        buttonAdd = findViewById(R.id.buttonAdd);
        listViewTasks = findViewById(R.id.listViewTasks);

        taskList = new ArrayList<>();
        adapter = new ToDoAdapter(this, taskList);
        listViewTasks.setAdapter(adapter);

        buttonAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String task = editTextTask.getText().toString();
                if (!task.isEmpty()) {
                    taskList.add(new ToDoItem(task));
                    adapter.notifyDataSetChanged();
                    editTextTask.setText("");
                } else {
                    Toast.makeText(MainActivity.this, "Please enter a task", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}