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POAndroid Webview - Completely Clear the Cache
 

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    <p>I have a WebView in one of my Activities, and when it loads a webpage, the page gathers some background data from Facebook.</p> <p>What I'm seeing though, is the page displayed in the application is the same on each time the app is opened and refreshed.</p> <p>I've tried setting the WebView not to use cache and clear the cache and history of the WebView.</p> <p>I've also followed the suggestion here: <a href="https://stackoverflow.com/questions/1790254/how-to-empty-cache-for-webview">How to empty cache for WebView?</a></p> <p>But none of this works, does anyone have any ideas of I can overcome this problem because it is a vital part of my application.</p> <pre><code> mWebView.setWebChromeClient(new WebChromeClient() { public void onProgressChanged(WebView view, int progress) { if(progress &gt;= 100) { mProgressBar.setVisibility(ProgressBar.INVISIBLE); } else { mProgressBar.setVisibility(ProgressBar.VISIBLE); } } }); mWebView.setWebViewClient(new SignInFBWebViewClient(mUIHandler)); mWebView.getSettings().setJavaScriptEnabled(true); mWebView.clearHistory(); mWebView.clearFormData(); mWebView.clearCache(true); WebSettings webSettings = mWebView.getSettings(); webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE); Time time = new Time(); time.setToNow(); mWebView.loadUrl(mSocialProxy.getSignInURL()+"?time="+time.format("%Y%m%d%H%M%S")); </code></pre> <p>So I implemented the first suggestion (Although changed the code to be recursive)</p> <pre><code>private void clearApplicationCache() { File dir = getCacheDir(); if(dir!= null &amp;&amp; dir.isDirectory()) { try { ArrayList&lt;File&gt; stack = new ArrayList&lt;File&gt;(); // Initialise the list File[] children = dir.listFiles(); for(File child:children) { stack.add(child); } while(stack.size() &gt; 0) { Log.v(TAG, LOG_START+"Clearing the stack - " + stack.size()); File f = stack.get(stack.size() - 1); if(f.isDirectory() == true) { boolean empty = f.delete(); if(empty == false) { File[] files = f.listFiles(); if(files.length != 0) { for(File tmp:files) { stack.add(tmp); } } } else { stack.remove(stack.size() - 1); } } else { f.delete(); stack.remove(stack.size() - 1); } } } catch(Exception e) { Log.e(TAG, LOG_START+"Failed to clean the cache"); } } } </code></pre> <p>However this still hasn't changed what the page is displaying. On my desktop browser I am getting different html code to the web page produced in the WebView so I know the WebView must be caching somewhere.</p> <p>On the IRC channel I was pointed to a fix to remove caching from a URL Connection but can't see how to apply it to a WebView yet.</p> <p><a href="http://www.androidsnippets.org/snippets/45/" rel="noreferrer">http://www.androidsnippets.org/snippets/45/</a></p> <p>If I delete my application and re-install it, I can get the webpage back up to date, i.e. a non-cached version. The main problem is the changes are made to links in the webpage, so the front end of the webpage is completely unchanged.</p>
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