Build framework7 vue in android

Hello. I have completed my code and was going into build them in android. I did run build for the first time to see the GUI of the apps. After the backend has been done, when I build it for second time, any changes I’ve made is not included. Yet the apps only show the GUI that I’ve made prior before. I’ve use cordova run android, cordova run android --device, everything is the same. Can anyone help me please?