nativescript-demo/app/main.js

import Vue from 'nativescript-vue'
import App from './components/App'

import * as Sqlite from 'nativescript-sqlite';
import RadListView from 'nativescript-ui-listview/vue';

let initDb = function (db) {
  db.execSQL('create table answer_sheet(' +
      ' `sheetName` text, `questionaireId` int, ' +
      ' `status` int, `startTime` int, `endTime` int, ' +
      ' `locationLong` NUMERIC, `locationLat` NUMERIC, ' +
      ' `answerJson` text,  `dataUploaded` int, ' +
      ' `hasAudio` int, `audioUploaded` int, ' +
      ' `userName` text)', function (error) {
          if (error) {
              console.error('create table answer_sheet failed', error);
          } else {
              console.log('create table answer_sheet success')
          }
      });
  db.execSQL('create table questionaire (`questionaireId` int, `version` int, `status` int, `contentJson` text )',
      function (error) {
          if (error) {
              console.error('create table questionaire failed', error);
          } else {
              console.log('create table questionaire success')
          }
      });

  db.execSQL('create table version_info (`version_no` float, `description` text)', function (error) {
      if (error) {
          console.error('create table version_info failed', error);
      } else {
          console.log('create table version_info success')
      }
  })
}


let updateDb = function (db) {

}

function getConnectionType() {
  const connectivityModule = require("@nativescript/core/connectivity");
  const myConnectionType = connectivityModule.getConnectionType();
  switch (myConnectionType) {
      case connectivityModule.connectionType.none:
          // Denotes no Internet connection.
          console.log('connection type', "No connection");
          return 'None';
          break;
      case connectivityModule.connectionType.wifi:
          // Denotes a WiFi connection.
          console.log('connection type', "WiFi connection");
          return 'WiFi';
          break;
      case connectivityModule.connectionType.mobile:
          // Denotes a mobile connection, i.e. cellular network or WAN.
          console.log('connection type', "Mobile connection");
          return 'Mobile';
          break;
      case connectivityModule.connectionType.ethernet:
          // Denotes a ethernet connection.
          console.log('connection type', "Ethernet connection");
          return 'Ethernet';
          break;
      case connectivityModule.connectionType.bluetooth:
          // Denotes a bluetooth connection.
          console.log('connection type', "Bluetooth connection");
          return 'Bluetooth';
          break;
      default:
          return 'unknown';
          break;
  }
}

Vue.use(RadListView);
if (TNS_ENV !== 'production') {
  Vue.use(VueDevtools)
}
// Prints Vue logs when --env.production is *NOT* set while building
Vue.config.silent = (TNS_ENV === 'production')

// Vue.prototype.$baseUrl = 'http://127.0.0.1:8080/api';
// Vue.prototype.$baseUrl = 'http://192.168.1.4:8080/api';
Vue.prototype.$baseUrl = 'http://api.scxbzw.com/api';

console.log('audio path', knownFolders.documents().getFolder('audio').path);
let dbname = 'my.db';
let dbExist = Sqlite.exists(dbname);
console.log('exist db?', Sqlite.exists(dbname));
new Sqlite(dbname).then(database => {
  Vue.prototype.$db = database;
  console.log("db.isOpen()? ", database.isOpen() ? "Yes" : "No");
  if (!dbExist) {
      console.log('init db...');
      initDb(database);
  }


});
new Vue({
  render: h => h('frame', [h(App)])
}).$start()