WebView loadUrl works only once

Question

EDIT: I worked on this project years ago and unfortunately I cannot verify if any of the answers is working in the given scenario.

I am having hard time with one WebView which should show our blog. When initilized, it works just fine. The user can navigate to different links within the WebView. To get back to the blog, there is a button outside the WebView which should load the main blog site again.

The problem is, that nothing is loaded after the second call to loadUrl. Here is my code:

private WebView wv;

        @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

            this.setContentView(R.layout.blog);

    wv = (WebView) findViewById(R.id.blog_webview);
    wv.getSettings().setJavaScriptEnabled(true);
    wv.setWebViewClient(new WebViewClient() {

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon {
            MyLog.logDump("onPageStarted: " + url);
        }

        @Override
        public void onPageFinished(WebView view, String url) {
                            MyLog.logDump("onPageFinished: " + url);
        }
    });

    wv.loadUrl(Constants.BLOG_URL);
}

The function called by my OnClickListener is the following:

    public void reLoadUrl() {
        wv.loadUrl(Constants.BLOG_URL);

}

But despite that the logs in onPageFinished and onPageStarted show that my wv.loadUrl is being invoked and that it's loading the correct url, the content in the webview itself doesn't change. I've tried clearing the cache, the history, the view, tried different WebSettings, tried to use webView.goBack() - not result. Also those ideas don't work: Strange webview goBack issue in android

Sometimes, the reLoadUrl shows the desired result - but once it fails it no longer can be made to work again. Any ideas what could be happening? I did try to read the WebView code but I couldn't find anything that could help me.

The only thing that I can add, is that we are using some ad networks which are heavily dependent on webViews - I tried to turn those down, but I didn't remove the libraries so I am not sure that they are not the culprit.

Any ideas??

Solution 1

Use exact in below sequence.

   wv.clearCache(true);
   wv.clearView();
   wv.reload();
   wv.loadUrl("about:blank");
   wv.loadData(Constants.BLOG_URL);

Solution 2

I have spent the last day or so working on an application that utilised a WebView. I did have a few issues with loading data into the WebView.

I am not entirely sure this would work but perhaps replace this code:

public void reLoadUrl() {
    wv.loadUrl(Constants.BLOG_URL);

}

with this code:

public void reLoadUrl() {

    wv.clearView();
    wv.loadUrl(Constants.BLOG_URL);

}

maybe when you clear the WebView it will solve the issue

Solution 3

I had the same issue, calling resumeTimers() solved the problem for me...

Solution 4

I'd suggest you try recreating the WebView every time you use it and see if that makes any difference.

First save context, layout parms and parent.

Context context = wb.getContext();
ViewGroup.LayoutParams lp = wv.getLayoutParams();
ViewGroup parent = (ViewGroup)wv.getParent();

Then stop it loading and remove the view from its parent.

wv.stopLoading();
parent.removeView(wv);

Then recreate and add it back.

wv = new WebView(context);
parent.addView(wv, lp);

That may be other properties that you'll need to restore, but that's the general idea.

Solution 5

Try setting a WebChrome client. The webview needs support of WebChrome Clint to work properly in some cases.

wv.setWebChromeClient(new WebChromeClient());

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