Android : Andriod Studio Assets not loading Local HTML File

I have looked about and everything looks right but its not working it will let me load internet pages but soon as I change it to load my localhtml file it comes up as webpage not found here is my code and my assest folder is at app/src/main/asset/index.html to make sure I not made a mistake

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);

    mWebView = (WebView) findViewById(R.id.activity_main_webview);
    // Enable Javascript
    WebSettings webSettings = mWebView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    mWebView.loadUrl("file:///android_asset/index.html");

any help would be great