10ff 10ff - 7 months ago 16
Javascript Question

Javascript not working in a WebView Activity

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?

Answer

Set this setting as well for your webView:

WebSettings settings = webView.getSettings();
settings.setDomStorageEnabled(true);

For Detail refer to answer in the following link: ERROR/Web Console: Uncaught TypeError: Cannot call method 'getItem' of null at http://m.youtube.com/:844

Update: or adding this might help:

webView.loadDataWithBaseURL("fake://fake.com", myString, "text/html", "UTF-8", null);