android - using sqlite in nativescript application: DB not persistent -

i'm trying use nativescript-sqlite plugin described . on project page https://github.com/nathanaela/nativescript-sqlite .

to maintain reasonable project struture, wand put sqlite related stuff in service.

@injectable()  export class itemservice {     private items = new array<item>();      private database: any;      public constructor() {         (new sqlite("my.db")).then(db => {             db.execsql("create table if not exists people (id integer primary key autoincrement, firstname text, lastname text, role text)").then(id => {                 this.database = db;             }, error => {                 console.log("create table error", error);             });         }, error => {             console.log("open db error", error);         });     } .... 

while application runs, it's working expected, unfortunately data not persist. app closed , restartet, db seems empty/recreated.

do have hint me what's missing? or have more extensive example app source code @ hand?

thanks lot