Failed to load resource: net::ERR_FILE_NOT_FOUND

I use requireJs to modularize ionic project, and I meet some problems.
When I use VSCode run the ionic project on android, there are some errors like “Failed to load resource: net::ERR_FILE_NOT_FOUND (file:///android_asset/components/tabs-component/tabs-view.html”.
But when I run the sentence(“ionic run android -1”) on command line, it works successfully.
And I also successfully run the project on browser.
Is there anyone can help me?