I have an Activity that has just a WebView, which contains HTML, CSS and Javascript Code.

It seems that there's a problem with the access of Javascript to the screen size of the view.
LogCat says:

(Tag: Web Console): Uncaught TypeError: Cannot call method 'getWidth' of undefined 

at file:///android_asset/Prospekte/grund/html5-player/js/epaper-mobile.js:20

When I look into the js-file, there is: var f=this.body.getWidth();

There curious thing is that sometimes the code works. The epaper is shown well. But most time there's this error.

    setContentView(R.layout.prospekt_layout);

    final Activity activity = this;



    mWebView = (WebView) findViewById(R.id.prospekt_webview);

    mWebView.getSettings().setJavaScriptEnabled(true);

    mWebView.getSettings().setDomStorageEnabled(true);

    mWebView.setWebChromeClient(new WebChromeClient() {

    public void onProgressChanged(WebView view, int progress) {

        activity.setProgress(progress * 1000);

      }

    });



    mWebView.setWebViewClient(new WebViewClient() {

        @Override

        public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)

        {

            // Handle the error

        }



        @Override

        public boolean shouldOverrideUrlLoading(WebView view, String url)

        {

            view.loadUrl(url);

            return true;

        }

    });   



    mWebView.loadUrl(file:///android_asset/Prospekte/modKachel/mobile.html);    

The layout is:

 <?xml version=1.0 encoding=utf-8?>

<LinearLayout 

    xmlns:android=http://schemas.android.com/apk/res/android

    android:layout_height=match_parent

    android:layout_width=match_parent

    >

<WebView

    android:id=@+id/prospekt_webview

    android:layout_width=900px

    android:layout_height=900px

/>

</LinearLayout>

I changed the size of the webView cause I thought that this could be the solution..but it's no working with dp either.

Someone has in idea?