android system webview disabled

: @ JavaScriptInterface; In the virtual machine, Javascript calls the Java method to detect this anotation, if the method is identified as @ JavaScriptInterface, Javascript can successfully call this Java method. Otherwise, the call fails. Example: class JsObject { @JavascriptInterface public String toString() { return "injectedObject"; } } webView.addJavascriptInterface(new JsObject(), "injectedObject"); public void evaluateJavascript (String script, ValueCallbackThis method is introdu

; 13} 14 // If it wasn't the Back key or there's no web page history, bubble up15 // to the default16 // system behavior (probably exit the activity) 17 return super. onKeyDown (keyCode, event); 18} 　CanGoBack ()Method returns true when the webpage can be retired. Similarly, the canGoForward () method can check whether there are historical records that can be moved forward. If you do not perform this check, onceGoBack ()AndgoForward()Methods reach the

Original link: http://developer.android.com/guide/webapps/webview.htmlReference:http://developer.android.com/reference/android/webkit/webview.htmlIf you want to implement a web app (or just a Web page) as part of your app, you can use WebView to implement it. WebView is an extension of the Android view class that allow

before providing js call Methods: @ JavaScriptInterface; In the virtual machine, Javascript calls the Java method to detect this anotation, if the method is identified as @ JavaScriptInterface, Javascript can successfully call this Java method. Otherwise, the call fails. Example: class JsObject { @JavascriptInterface public String toString() { return injectedObject; } } webView.addJavascriptInterface(new JsObject(), injectedObject); public void evaluateJavascript (String script, ValueC

provided by the Android system for access. Webviewclient also provides many methods, such as the following: (1) doupdatevisitedhistory (webview view, string URL, Boolean isreload); // update history (2) onformresubmission (webview view, message dontresend, message resend); // re-request webpage data (3) onload

Overview:Android WebView is a special view on the Android platform that can be used to display Web pages, which can be used to display only an online page in your app and to develop a browser. WebView internal implementation is the use of the rendering engine to display the content of the view, providing Web page forward and backward, Web page zoom in, zoom out,

); Set enable or disable access to file data(2) Setbuiltinzoomcontrols (Boolean enabled); Set whether scaling is supported(3) setdefaultfontsize (int size); Set the default font size(4) setjavascriptenabled (Boolean flag); Set whether JavaScript is supported(5) Setsupportzoom (Boolean support); Set whether Zoom is supported3.WebViewClientWebviewclient is mainly used to assist WebView to handle various notifications, requests and other events. This al

= conn. getInputStream (); FileOutputStream out = null; // obtain the download path File downloadFile; File sdFile; if (Environment. getExternalStorageState (). equals (Environment. MEDIA_MOUNTED) {downloadFile = Environment. getExternalStorageDirectory (); sdFile = New File (downloadFile, download.zip); out = new FileOutputStream (sdFile);} byte [] B = new byte [8*1024]; int len; while (len = in. read (B ))! =-1) {if (out! = Null) {out. write (B, 0, len) ;}} if (out! = Null) {out. close () ;}i

Web Applications Program Overview 1. Implementation Method There are basically two ways to develop web programs on Android, one is to use Android SDK to develop APK and webview; the other is to use web standard development and access through a web browser.2. FeaturesA. The viewport attribute is supported to allow the application to adapt to screens of differen

there are multiple images referenced by the same SRC, there will only be an image tag is loaded, so for this system we first directly loaded.Xi. WebView Hardware acceleration causes page rendering Flicker problem Solving methodAbout Android hardware acceleration starts at Android 3.0 (API level 11) and turns hardware

. setScrollBarStyle (SCROLLBARS_OUTSIDE_OVERLAY ); 4) set the web page to be displayed in WevView:Internet: webView. loadUrl ("www.2cto.com ");Local file: webView. loadUrl ("www.2cto.com"); local file stored in: assets File5) If you want to click the link for processing by yourself, instead of the link in the browser of the new Android

FunctionRequestfocus ();Cancel scroll barThis. setscrollbarstyle (scrollbars_outside_overlay );4. Set the web page to be displayed in wevview:For Internet: webview. loadurl ("http://www.google.com ");Local file: webview. loadurl ("file: // android_asset/xx.html"); local files are stored in the assets file.5. If you want to click the link, you can handle it by yourself, instead of clicking the link in the b

is initialized:public void Int () { if (Build.VERSION.SDK_INT >=) { webview.getsettings (). setloadsimagesautomatically ( true); } else { webview.getsettings (). setloadsimagesautomatically (false);} }At the same time, rewrite the onpagefinished () method in the Webviewclient subclass of WebView to add the following code:@Overridepublic void onpagefinished (WebView view, String URL)

Android basic control usage details-WebView Some inexplicable problems often occur during development. Make a record to facilitate future summarization. This series will be updated from time to time! WebView is a component of android, and its kernel is based on the open-source WebKit engine. If we beautify and package

. INTERNET". Otherwise, the Web page not available error may occur. 2. If the accessed page contains Javascript, webview must be set to support Javascript. Webview. getSettings (). setJavaScriptEnabled (true ); 3. If you want to click the link on the page to continue responding in the current browser, instead of making a response in the browser of the new Android

include:1. Corresponds to the first three functions in the above class diagram. It can interfere with the startup process, especially when the boot process specifies some function switches. For example, the file System API is disabled, WebRTC hardware decoding, and so on. The following is the starting process:2. Corresponds to the following four functions in the above class diagram. You can let Embedder cu