javascript - Android - after loading URL with webview can i change background color - Stack Overflow

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I have a webview and im loading an external HTML form a site. I try to change the background color using javascript function:

    function changeBGC(color){
document.bgColor = color;
}

and that does not work. but if i load locally then im able to change the background color. Is there some kind of security inhibiting me from changing a web page i load into the webview externally ?

I have a webview and im loading an external HTML form a site. I try to change the background color using javascript function:

    function changeBGC(color){
document.bgColor = color;
}

and that does not work. but if i load locally then im able to change the background color. Is there some kind of security inhibiting me from changing a web page i load into the webview externally ?

• javascript
• android
• security
• webview

Share Improve this question Follow asked Sep 1, 2013 at 4:15 j2emanuej2emanue 62.6k7474 gold badges304304 silver badges474474 bronze badges 1

• You want t change the background color of Webview ? If yes, then you can try using setBackgroundcolor as well. – Shobhit Puri Commented Sep 1, 2013 at 4:31

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1 Answer 1

Sorted by: Reset to default 8

You can run javascript using the WebViewClient, example here.

The javascript code that changes the background color of a document.

So to put it all together:

When initing WebView:

WebView webview = new WebView();
webview.setWebViewClient(new WebClient());
webView.getSettings().setJavaScriptEnabled(true);
webview.loadUrl("stackoverflow.");

Your web view client:

public class WebClient extends WebViewClient {

    int color;

    public WebClient(int color) {
        this.color = color;
    }
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
    }

    @Override
    public void onPageFinished(WebView view, String url) 
    {
        String mand = "javascript:document.body.style.background = " + color + ";";
        view.loadUrl(mand);       
    }
}

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