Question

我正在努力解决一个奇怪的问题。我试图加载https网页，但第一次没有加载webview。等待60秒后，我必须再次单击我的按钮才能加载我的页面。我的设备是带有Lollipop的Nexus 4，但这个问题也出现在Android 4.4和4.1的设备上。该网址只有少量javascript文件和css文件。

记录：

 I/WebViewFactory﹕ Loading com.google.android.webview version 37 (1602158-arm) (code 111201)
 I/LibraryLoader﹕ Loading: webviewchromium
 I/LibraryLoader﹕ Time to load native libraries: 3 ms (timestamps 5331-5334)
 I/LibraryLoader﹕ Expected native library version number "",actual native library version number ""
 I/LibraryLoader﹕ Expected native library version number "",actual native library version number ""
 I/chromium﹕ [INFO:library_loader_hooks.cc(106)] Chromium logging enabled: level = 0, default verbosity = 0
 I/BrowserStartupController﹕ Initializing chromium process, renderers=0
 W/art﹕ Attempt to remove local handle scope entry from IRT, ignoring
 W/chromium﹕ [WARNING:resource_bundle.cc(315)] locale_file_path.empty()
 I/chromium﹕ [INFO:aw_browser_main_parts.cc(63)] Load from apk succesful, fd=72 off=159196 len=3264
 I/chromium﹕ [INFO:aw_browser_main_parts.cc(78)] Loading webviewchromium.pak from, fd:73 off:229484 len:643667
 W/AudioManagerAndroid﹕ Requires BLUETOOTH permission
 W/chromium﹕ [WARNING:proxy_service.cc(901)] PAC support disabled because there is no system implementation
 W/chromium﹕ [WARNING:data_reduction_proxy_settings.cc(403)] SPDY proxy OFF at startup
 W/art﹕ Attempt to remove local handle scope entry from IRT, ignoring
 W/AwContents﹕ onDetachedFromWindow called when already detached. Ignoring
 I/chromium﹕ [INFO:SkUtilsArm.cpp(179)] Device supports ARM NEON instructions!

我的代码：

final WebView wv = (WebView) alert.findViewById(R.id.modal_wv);

    wv.getSettings().setAppCacheEnabled(true);
    wv.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);
    wv.getSettings().setAppCachePath("/data/data/" + getPackageName() + "/cache");
    wv.getSettings().setAllowFileAccess(true);
    wv.getSettings().setJavaScriptEnabled(true);
    wv.loadUrl(connectionResponse.getUrl());
/*
//Same behavior ...
    wv.post(new Runnable() {
        @Override
        public void run() {
            wv.loadUrl(connectionResponse.getUrl());
        }
    });
*/

我设置了一个新的WebClient（）来覆盖以下方法：shouldOverrideUrlLoading，onLoadResource，onPageFinished。为了测试目的，我删除了这个自定义WebClient，但它仍然没有在第一时间加载。

由于

Answer 1

我遇到了同样的问题。我花了3天多的时间找到了另一个WebView对象调用pauseTimers（）来保存一些CPU性能的原因，这实际上是＆＃34;暂停所有WebView的所有布局，解析和JavaScript计时器。＆＃34;

Answer 2

由于您在webview中加载 https 网址，因此会导致SSL认证问题因此，您必须覆盖另一种处理认证问题的方法并处理它这是代码如何解决它

myWebView.setWebViewClient(new WebViewClient() {
        @Override
        public void onReceivedError(WebView view, int errorCode,
                String description, String failingUrl) {
            Toast.makeText(MainActivity.this, description,
                    Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onReceivedSslError(WebView view,
                SslErrorHandler handler, SslError error) {
            // TODO Auto-generated method stub
            // this method will proceed your url however if certification issues are there or not
            handler.proceed();
        }

    });
myWebView.loadUrl(url);

编辑：如果您要为您的网页视图启用javascript界面执行以下步骤

private JavascriptInterface jsInterface;


engine.getSettings().setJavaScriptEnabled(true);
        jsInterface = new JavascriptInterface();
        try {
            ComponentName comp = new ComponentName(this, Dashboard.class);
            PackageInfo pinfo = getPackageManager().getPackageInfo(comp.getPackageName(), 0);
            jsInterface.versionCode = pinfo.versionCode;
            } catch (android.content.pm.PackageManager.NameNotFoundException e) {
            }
            engine.addJavascriptInterface(jsInterface, "androidlearnscripture");
                            engine.requestFocus(View.FOCUS_DOWN);
        }

javascript代码将在此处

    public void onPageStarted(WebView view, String url,Bitmap favicon) {
            jsInterface.enablePreferencesMenu = false;
            jsInterface.modalIsVisible = false;
            jsInterface.urlForSharing = null;
            bLoadingFinished = false;
}

Answer 3

我通过在完成加载后从功能onPageFinished(WebView view, String url)向布局添加webview解决了同样的问题。

Answer 4

您是否在androidmanifest.xml中声明了互联网权限？

<manifest...>
.. .
<uses-permission android:name="android.permission.INTERNET" />
..
</manifest>

也尝试设置一个webview客户端。

          //default browser
          wv.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url)
            {
                L.log(url);
                return super.shouldOverrideUrlLoading(view, url);
            }
        });
        //chrome browser
        wv.setWebChromeClient(new WebChromeClient() {
            public void onProgressChanged(WebView view, int progress)
            {
                progressBar.setProgress(progress);
                if (progress == 100) {
                    progressBar.setVisibility(View.GONE);
                }
            }

        });

Webview第一次没有加载

4 个答案: