寒假学习日报29

public class DatabaseHelper extends SQLiteOpenHelper {
    public DatabaseHelper(Context context) {
        super(context,"account_daily", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("create table if not exists account_cost(" +
        "id integer primary key, " +
        "cost_title varchar, " +
        "cost_date varchar, " +
        "cost_money varchar)");
    }

fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            LayoutInflater inflater = LayoutInflater.from(MainActivity.this);
            View viewDialog = inflater.inflate(R.layout.new_cost_data, null);
            final EditText title = (EditText) viewDialog.findViewById(R.id.et_cost_title);
            final EditText money = (EditText) viewDialog.findViewById(R.id.et_cost_money);
            final DatePicker date = (DatePicker) viewDialog.findViewById(R.id.dp_cost_date);
            builder.setView(viewDialog);
            builder.setTitle("New Cost");
            builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    CostBean costBean = new CostBean();
                    costBean.costTitle = title.getText().toString();
                    costBean.costMoney = money.getText().toString();
                    costBean.costDate = date.getYear() + "-" +(date.getMonth() + 1) + "-" +
                            date.getDayOfMonth();

                    mDatabaseHelper.insertCost(costBean);
                    mCostBeanList.add(costBean);
                    mAdapter.notifyDataSetChanged();
                }
            });
            builder.setNegativeButton("Cancel",null);
            builder.create().show();
        }
    });
}