Implement editing contacts after being stored in the database

Question

I'm adapting an application that manages contacts with database interaction.

In the application, I am inserting and deleting contacts but I'm struggling to implement the method to edit the contacts and record the contact edited in the database.

The onContextItemSelected method is in place and lack only that part.

onContextItemSelected method in MainActivity

    public boolean onContextItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case EDIT:
            // TODO: Implement editing a contact
            break;
        case DELETE:
            dbHandler.deleteContact(Contacts.get(longClickedItemIndex));
            Contacts.remove(longClickedItemIndex);
            contactAdapter.notifyDataSetChanged();
            break;
    }

    return super.onContextItemSelected(item);
    }

DatabaseHandler class with updateContact method

public class DatabaseHandler extends SQLiteOpenHelper {

private static final int DATABASE_VERSION = 1;

private static final String DATABASE_NAME = "controleAgenda",
        TABLE_CONTACTS = "contatos",
        KEY_ID = "id",
        KEY_NAME = "nome",
        KEY_PHONE = "telefone",
        KEY_ADDRESS = "endereco",
        KEY_EMAIL = "email",
        KEY_IMAGEURI = "imageUri";

public DatabaseHandler(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
}

@Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL("CREATE TABLE " + TABLE_CONTACTS + "(" + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + KEY_NAME + " TEXT," + KEY_PHONE + " TEXT," + KEY_ADDRESS + " TEXT," + KEY_EMAIL + " TEXT," + KEY_IMAGEURI + " TEXT)");
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_CONTACTS);

    onCreate(db);
}

public void createContact(Contato contato) {
    SQLiteDatabase db = getWritableDatabase();

    ContentValues values = new ContentValues();

    values.put(KEY_NAME, contato.getName());
    values.put(KEY_PHONE, contato.getPhone());
    values.put(KEY_ADDRESS, contato.getAddress());
    values.put(KEY_EMAIL, contato.getEmail());
    values.put(KEY_IMAGEURI, contato.getImageURI().toString());

    db.insert(TABLE_CONTACTS, null, values);
    db.close();
}

public Contato getContact(int id) {
    SQLiteDatabase db = getReadableDatabase();

    Cursor cursor = db.query(TABLE_CONTACTS, new String[] { KEY_ID, KEY_NAME, KEY_PHONE, KEY_EMAIL, KEY_ADDRESS, KEY_IMAGEURI }, KEY_ID + "=?", new String[] { String.valueOf(id) }, null, null, null, null );

    if (cursor != null)
        cursor.moveToFirst();

    Contato contato = new Contato(Integer.parseInt(cursor.getString(0)), cursor.getString(1), cursor.getString(2), cursor.getString(3), cursor.getString(4), Uri.parse(cursor.getString(5)));
    db.close();
    cursor.close();
    return contato;
}

public void deleteContact(Contato contato) {
    SQLiteDatabase db = getWritableDatabase();
    db.delete(TABLE_CONTACTS, KEY_ID + "=?", new String[] { String.valueOf(contato.getId()) });
    db.close();
}

public int getContactsCount() {
    SQLiteDatabase db = getReadableDatabase();
    Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_CONTACTS, null);
    int count = cursor.getCount();
    db.close();
    cursor.close();

    return count;
}

public int updateContact(Contato contato) {
    SQLiteDatabase db = getWritableDatabase();

    ContentValues values = new ContentValues();

    values.put(KEY_NAME, contato.getName());
    values.put(KEY_PHONE, contato.getPhone());
    values.put(KEY_ADDRESS, contato.getAddress());
    values.put(KEY_EMAIL, contato.getEmail());
    values.put(KEY_IMAGEURI, contato.getImageURI().toString());

    int rowsAffected = db.update(TABLE_CONTACTS, values, KEY_ID + "=?", new String[] { String.valueOf(contato.getId()) });
    db.close();

    return rowsAffected;
}

public List<Contato> getAllContacts() {
    List<Contato> contacts = new ArrayList<Contato>();

    SQLiteDatabase db = getWritableDatabase();
    Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_CONTACTS, null);

    if (cursor.moveToFirst()) {
        do {
            contacts.add(new Contato(Integer.parseInt(cursor.getString(0)), cursor.getString(1), cursor.getString(2), cursor.getString(3), cursor.getString(4), Uri.parse(cursor.getString(5))));
        }
        while (cursor.moveToNext());
    }
    cursor.close();
    db.close();
    return contacts;
}
}