node.js 第一个UI界面按钮

"ui";
require('rhino').install();

const MenuItem = android.view.MenuItem;
const Snackbar = com.google.android.material.snackbar.Snackbar;

const ui = require('ui');
const app = require('app');

const {
    showConfirmDialog
} = require('dialogs');

class MainActivity extends ui.Activity {
    get layoutXml() {
        return `
    
        
    
        `
    }

    onContentViewSet(view) {
        view.findView("按钮").on("click", async () => {
            if (await showConfirmDialog("是否增加列表数据?")) {
                this.listData.push({
                    text: "New",
                    enabled: false
                });
            }
        });

    }
}

ui.setMainActivity(MainActivity);