WebView第二次显示空白屏幕？
我目前正在开发一款应用程序，可在Android WebView中以桌面模式加载https://web.whatsapp.com/ whatsapp for web。 它在棒棒糖版本上工作正常，但在API 23及以上版本（棉花糖及以上）应用程序仅加载网站一次，如果按下重新加载按钮，它只显示一个空白屏幕！
这是Android API级别21上的代码正常工作但不是上面请帮助!!
public class Main_web_view_frag extends android.support.v4.app.Fragment { public WebView Assignment_webView; public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View slide_view = inflater.inflate(R.layout.assignment_main_webview, container, false); Assignment_webView = (WebView)slide_view.findViewById(R.id.webView); Assignment_webView.getSettings().setJavaScriptEnabled(true); Assignment_webView.setWebViewClient(new My_web_Browser()); Assignment_webView.loadUrl("https://web.whatsapp.com/"); setDesktopMode(true); return slide_view; } private class My_web_Browser extends WebViewClient { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { return true; } } public void setDesktopMode(final boolean enabled) { final WebSettings Assignment_webSettings = Assignment_webView.getSettings(); String new_Assign_UserAgent; if (enabled) { new_Assign_UserAgent = Assignment_webSettings.getUserAgentString().replace("Mobile", "eliboM").replace("Android", "diordnA"); } else { new_Assign_UserAgent = Assignment_webSettings.getUserAgentString().replace("eliboM", "Mobile").replace("diordnA", "Android"); } Assignment_webSettings.getJavaScriptEnabled(); Assignment_webSettings.setUserAgentString(new_Assign_UserAgent); Assignment_webSettings.setUseWideViewPort(true); Assignment_webSettings.setLoadWithOverviewMode(true); Assignment_webSettings.setSupportZoom(enabled); Assignment_webSettings.setBuiltInZoomControls(true); Assignment_webSettings.getJavaScriptCanOpenWindowsAutomatically(); Assignment_webSettings.setDisplayZoomControls(false); Assignment_webSettings.setDatabaseEnabled(true); Assignment_webSettings.setDomStorageEnabled(true); Assignment_webSettings.setAllowFileAccess(true); Assignment_webSettings.setAppCacheEnabled(true); Assignment_webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY); Assignment_webSettings.setAppCachePath(getActivity().getApplicationContext().getCacheDir().getPath()); String appCachePath = getActivity().getCacheDir().getAbsolutePath(); Assignment_webSettings.setAppCachePath(appCachePath); } } 终于得到了解决方案！ 您只需要在webview中添加一个useragent字符串，就像chrome或任何其他Web浏览器一样。
yourWebView.getSettings().setUserAgentString("Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36");