blocks|key|458610|text|在loadData+Kuldip+Bairagi之前使用以下语句|type|unstyled|depth|inlineStyleRanges|entityRanges|data|458611|view.loadUrl("javascript:document.open();document.close();")；|458612|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

use following statement before loadData [Kuldip Bairagi]

view.loadUrl("javascript:document.open();document.close();");

blocks|key|672902|text|Thnx+to+StefanK+comment+found+Here，您需要在页面完成加载时使用clearHistory()方法，WebViewClient+onPageFinished(WebView+view,+String+url)方法也在onLoadResource(WebView+view,+String+url)方法中；如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|672903|++++myCoolWebView.setWebViewClient(new+WebViewClient()+{
++++++++@Override
++++++++public+boolean+shouldOverrideUrlLoading(WebView+view,+String+url){
++++++++++++view.loadUrl(url);
++++++++++++return+true;
++++++++}
++++++++@Override
++++++++public+void+onLoadResource(WebView+view,+String+url)+{
++++++++++++//+Notice+Here.
++++++++++++view.clearHistory();
++++++++++++super.onLoadResource(view,+url);
++++++++}
++++++++@Override
++++++++public+void+onPageFinished(WebView+view,+String+url)+{
++++++++++++//+And+Here.
++++++++++++view.clearHistory();
++++++++++++super.onPageFinished(view,url);
++++++++}
++++});|code-block|syntax|javascript|672904|您还可以检查canGoBack()和copyBackForwardList()中的操作。|672905|entityMap|0|LINK|mutability|MUTABLE|url|https://groups.google.com/forum/#!topic/android-developers/Onpbm7esvsM^0|1C|E|1T|D|27|14|3F|14|U|4|0|0|0|6|B|I|L|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|F|3|G|5|H|7|16|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|17|8|@$9|18|A|19|B|C]|$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

Thnx to StefanK comment found <a href="https://groups.google.com/forum/#!topic/android-developers/Onpbm7esvsM" rel="nofollow">Here</a>, You need to use the <code>clearHistory()</code> method right when the page finishes loading in the <code>WebViewClient</code> <code>onPageFinished(WebView view, String url)</code> method also in the <code>onLoadResource(WebView view, String url)</code> method; as follows:

<pre><code> myCoolWebView.setWebViewClient(new WebViewClient() {
 @Override
 public boolean shouldOverrideUrlLoading(WebView view, String url){
 view.loadUrl(url);
 return true;
 }
 @Override
 public void onLoadResource(WebView view, String url) {
 // Notice Here.
 view.clearHistory();
 super.onLoadResource(view, url);
 }
 @Override
 public void onPageFinished(WebView view, String url) {
 // And Here.
 view.clearHistory();
 super.onPageFinished(view,url);
 }
 });
</code></pre>

Also you can check the <code>canGoBack()</code> and <code>copyBackForwardList()</code> for manipulations.

blocks|key|458729|text|我通常在加载新的url之前隐藏webview，然后在加载进度稍有进展时再显示它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|458730|//+url+loading
mWebView.setVisibility(View.INVISIBLE);
mWebView.loadUrl(newUrl);

//+show+webview+again
mWebView.setWebChromeClient(new+WebChromeClient()+{
++++@Override
++++public+void+onProgressChanged(WebView+view,+int+progress)+{
++++++++if+(progress+>=+10)+{
++++++++++++mWebView.setVisibility(View.VISIBLE);
++++++++}
++++}
}|code-block|syntax|javascript|458731|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I usually hide the webview before loading the new url, and then show it again when the loading progress has advanced a bit.

<pre><code>// url loading
mWebView.setVisibility(View.INVISIBLE);
mWebView.loadUrl(newUrl);

// show webview again
mWebView.setWebChromeClient(new WebChromeClient() {
 @Override
 public void onProgressChanged(WebView view, int progress) {
 if (progress &gt;= 10) {
 mWebView.setVisibility(View.VISIBLE);
 }
 }
}
</code></pre>

blocks|key|673014|text|我想你可以使用Webview.clearHistory()。但请记住，在加载WebView之后调用它是如此无能为力。例如代码：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|673015|webView.loadData(someUrl);
webView.clearHistory();|code-block|syntax|javascript|673016|无法工作，因为未加载webView。我们必须像这样清理它：|673017|webView.setWebViewClient(new+WebViewClient()+{
++++++++++++@Override
++++++++++++public+void+onPageFinished(WebView+view,+String+url)+{
++++++++++++++++super.onPageFinished(view,+url);
++++++++++++++++clearHistory();
++++++++++++}
}|673018|entityMap^0|7|M|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

I guess you can use <code>Webview.clearHistory()</code>. But remember so impotent to call this after WebView is loaded. For example the code:

<pre><code>webView.loadData(someUrl);
webView.clearHistory();
</code></pre>

won't work because webView is not loaded. We have to clear it like:

<pre><code>webView.setWebViewClient(new WebViewClient() {
 @Override
 public void onPageFinished(WebView view, String url) {
 super.onPageFinished(view, url);
 clearHistory();
 }
}
</code></pre>

blocks|key|458825|text|将webview的层类型设置为"software“似乎可以解决这个问题。也许前面的内容是由图形缓存引起的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|458826|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

It seems to set the layer type of webview as "software" can resolve the problem.
Perhaps the previous contents are caused by drawing cache.

blocks|key|673143|text|为空白页面创建一个包含HTML的字符串，并将其加载到for视图中。或者在加载之前将其隐藏起来。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|673144|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Create a string with the HTML for a blank page and load that into the webview. Or hide it until it is loaded.

My scenario is initially I am loading a WebView and later on I am loading the same WebView with a different URL.

My problem is whenever I am loading the next URL I can see the previously loaded URL contents and then my currently loaded URL contents gets displayed.

I want to clear the contents whenever I am loading the different URL.

Say,

<pre><code>if (pos == 0) {
 mweb.clearCache(true);
 mweb.clearHistory();
 mweb.loadUrl("http://stackoverflow.com/");
}
else if (pos == 1) {
 mweb.clearCache(true);
 mweb.clearHistory();
 mweb.loadUrl("http://android.stackexchange.com/");
}
</code></pre>

Both <code>clearCache()</code> and <code>clearHistory()</code> does not work for me.

How do I clear previous WebView's content before loading the next WebView?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我的场景是，一开始我加载一个WebView，然后我用不同的WebView加载相同的URL。我的问题是，每当我加载下一个URL时，我都可以看到之前加载的URL内容，然后我当前加载的URL内容就会显示出来。每当我加载不同的URL时，我都想清除内容。说,if (pos == 0) {    mweb.clearCache(t...

问如何在加载下一个WebView之前清除上一个WebView的内容？
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