package com.example.exampletodo;

import android.R;
import android.os.Bundle;
import android.app.Activity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.EditText;
import android.widget.Button;
import android.widget.ListView;
import java.util.ArrayList;
import android.widget.ArrayAdapter;

public class Main extends Activity implements OnClickListener, OnKeyListener {

    EditText txtItem;
    Button btnAdd;
    ListView listItems;

    ArrayList<String> toDoItems;
    ArrayAdapter<String> aa;

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

        txtItem = (EditText)findViewById(R.id.txtItem);
        btnAdd = (Button)findViewById(R.id.btnAdd);
        listItems = (ListView)findViewById(R.id.listItems);

        btnAdd.setOnClickListener(this);
        txtItem.setOnKeyListener(this);

        toDoItems = new ArrayList<String>();
        aa = new ArrayAdapter<String>(this, R.layout.simple_list_item_1, toDoItems);
        listItems.setAdapter(aa);
    }

    private void addItem(String item){
        if(item.length() > 0){
            this.toDoItems.add(item);
            this.aa.notifyDataSetChanged();
            this.txtItem.setText("");
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    public void onClick(View v){
        if(v == this.btnAdd){
            this.addItem(this.txtItem.getText().toString());
        }
    }

    public boolean onKey(View v, int keyCode, KeyEvent event){
        if(event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_DPAD_CENTER){
            this.addItem(this.txtItem.getText().toString());
        }
        return false;
    }

}