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android webview can not show content by loaddatawithbaseurl sometime

I use webview to load local html data like this
webview.loadDataWithBaseURL("about:blank", finalSrc, "text/html", "UTF-8", null);
the finalSrc is a variable of html string.
sometimes, the webview can display the corrent content,but sometimes not.
and I found that if I clear the cache of my app, the webview works well again.
so what's wrong with my app?

rather than using BaseUrl why don't use loadData. for example
webview.loadData(finalSrc, "text/html", "UTF-8");

How do I get my android webview make a load locally

I have a doubt. What happens is the following:
I exported my game by using cocoonjs contruct 2, but I want to run it on my android webview by, because I want to implement starApp, and cocoonjs not support this.
So, using my code below, I get only a blank screen.
But in my launcher cocoonjs, this same project works normally, just that I select Canvas + can anyone help me?
web = (WebView) findViewById(R.id.webInicial);
web.setWebChromeClient(new WebChromeClient());
web.getSettings().setJavaScriptEnabled(true);
web.loadUrl("file:///android_asset/www/index.html");

webView.loadData(yourData, "text/html", "UTF-8");
Where youData is the actual HTML data.

Have you tried getApplicationContext().getAssets().open("www/index.html");?
If that doesn't work, I'd say try the solutions in this post and let us know if it worked for you.

Had to load data twice to make WebView refresh in Android

When I first create the activity, everything goes fine. However, after I choose from menu to change some text of the String values and set the webview by
webview.loadData(result, "text/html; charset=UTF-8", null);
webview.loadData(result, "text/html; charset=UTF-8", null);
I have to do it twice, or the webview will keep unchanged. Is there anyone knows what happens here? Since the result String is the same, why webview force me to loadData twice?

Avoid WebView#loadData(String data, String mimeType, String encoding) - it's buggy.
Use WebView#loadDataWithBaseURL(String baseUrl, String data, String mimeType, String encoding, String historyUrl) instead.
So your instruction will be like:
webview.loadDataWithBaseURL(null,result,"text/html", "utf-8", null);

Don't know what's your problem but looking at the webview documentation, you are using the loadData method wrongly :
Webview:loadData documentation
You probably should call your webview like this :
webview.loadData(result, "text/html", "UTF-8");
Don't know if it will solve your issue at all.

Yes with loadDataWithBaseURL it does refresh the data, but then it ignores the CSS body background-color! ... At least it can't parse "%23000000" which works with loadData.

I am loading local HTML data into my webview, and this webview is inside recyclerview,
When I try webview.loadData() when it renders 1st time it working fine, but when I scrolling upward downward every inflated webview`s get messed-up.
When I try second webview.loadDataWithBaseURL() its working like charm.
so,when you're loading the HTML locally and it references assets such as images & css which are also packaged locally use webview.loadDataWithBaseURL()

Android +1 button in WebView

I've tried putting Google's +1 button in WebView using the methods they describe. I've initialized the WebView as follows:
final WebView web = (WebView)findViewById(R.id.webView);
web.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
web.getSettings().setJavaScriptEnabled(true);
web.getSettings().setSavePassword(false);
web.getSettings().setBuiltInZoomControls(false);
web.getSettings().setUseWideViewPort(true);
web.getSettings().setLoadWithOverviewMode(true);
web.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
web.setHorizontalScrollBarEnabled(false);
web.setBackgroundColor(0xff2e2e2e);
web.loadDataWithBaseURL(null, htmlCodeGoesHere, "text/html", "utf-8", null);
And the html code:
<script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script>
<g:plusone href="http://stackoverflow.com"></g:plusone>
The problem is... the button doesn't display at all.
How do I fix it? By the way - I also want the button to launch a new window instead using the WebView. Is there a simple solution?
Thanks

The problem lies in permissions system in WebView. Scripts in local files have problems accessing external resources. The solution is to make WebView think local code was loaded from external website.
web.loadDataWithBaseURL("http://fake.com", htmlCodeGoesHere, "text/html", "utf-8", null);
The button will appear, but unfortunetely it doesn't work well in WebView.

I am not too experienced with WebView, but the fact the the button doesn't show up at all, sounds like it could be an issue in your layout/main.xml file. Have you taken a look at this yet?
Also, for the button to launch a new window, I think it is possible to attach an setOnClickListener, once that is done just treat it as a button, and open a new window. I hope that is possible.

page not available when opening link in webview

I take the response from an HTTP connection in the form of string and show that to webview like this:
WebView engine = (WebView)findViewById(R.id.webview);
engine.loadData(endResult, "text/html", "UTF-8"); /*endresult is string*/
I actually get a response that contains the google page (google search result direct from google.com).
The loadData method works well i.e it shows the web page but when I click on one of the links on that page it shows "page not available" and said that "xyz link might be temporarily down or it may have moved to permanently to a new web address".
this happens for all links accept the first present link on that page. i.e it shows correct page from first link on that page but fails for others..

I noticed that OSes prior to 2.3 failed to follow links if setHorizontalScrollBarEnabled and setVerticalScrollBarEnabled are set to false.

try to use loadDataWithBaseURL of the WebView class

I would avoid using engine.loadData - it seems to cause all sorts of crazy problems.
Use engine.loadDataWithBaseURL instead, and pass the base URL of where the content exists. I would think that the content you are loading is using relative paths in it's HTML so it's looking inside your app resources. By specifying the base URL you get around this problem.