respectively.
However, as the JavaScript engine becomes more independent, WebKit and WebCore are now largely mixed (for example, Google Chrome and Maxthon 3 use the V8 engine, but they still claim to be the WebKit kernel).
Here we have a preliminary experience in Android is using WebView to browse the Web,
The Dev Guide in the SDK has a simple example in WebView
: @ 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
that when the WebView view is obscured by the whole and then suddenly recovers (such as using Slidemenu to slide the webview out of the side), the transition period appears white and the interface flashes. The solution to this problem is to temporarily shut down the hardware of the webview before the transition period, and then turn it on after the transition pe
(websettings.load_cache_else_network);
There are some attributes I will not speak out, interested in the search for their own.
Four, download the file
WebView sometimes contains links to downloaded files, and the files are downloaded to the local area after clicking the link. How to achieve it? The system provides us with a download interface Downloadlistener, the code is simple and convenient.
We
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
no web page history, bubble up to the default// System behavior (probably exit the activity)Return super. onkeydown (keycode, event );}
5. Now we have applied the above knowledge to implement a simple Android Application Based on Web View.The main function of a program is to display a webpage with a news hyperlink. You can click the hyperlink to load the news content page in the Web View.5.1 create an act
Multi-Resolution for Android devices
The default Preview mode of the Android browser will narrow down the WebView page and display it in the original size.
By default, the Android browser and WebView are mdpi. Hdpi is equivalent to 1.5 times of mdpi ldpi is equivalent to 0.
Use WebView to display Web pages in the interface via intent call system browser URI uri=uri.parse (URL);//url for the linked address intent intent=new intent (Intent.action_view,uri ); StartActivity (intent);----------------------------- Course Objective: Make a simple web browser through WebView course content: (1) Add WebV
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,
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
Android WebView page loading optimization, androidwebview
At present, there are more and more webapps and the experience is getting better and better. In order to better use WebView to display smooth pages, you can make the following optimizations:
WebView Cache
Resource File Local Storage
Reduce time-consuming ope
. 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
Android WebView page loading Optimization
At present, there are more and more webapps and the experience is getting better and better. In order to better use WebView to display smooth pages, you can make the following optimizations:WebView cache resource file local storage reduces time consumption operation client UI Optimization
Some may say, why not make it na
summarize that if redirection is not necessary, solution 1 is adopted, which is the simplest, with a small amount of modification. If redirection is necessary, solution 2 or solution 3 will be used.
Because of the need to interact with front-end personnel, the communication, development, and maintenance costs required by solution 3 are much higher than that required by solution 2, but the judgment on whether to redirect is very accurate, if multiple redirects exist, you do not need to change th
WebViewA Brief introduction:WebView is generally used to show the HTML of the Android page, we generally call it HTML5 development;WebView can make the Web page easy to embed into the app, but also can directly with JS call each other, through JSON or Gson format data call, can be very convenient and background interaction.WebView has two methods:setwebchromeclient and setwebclientSetwebclient: Mainly deal
Android 19 (WebView usage)
Android provides a WebView control, which enables you to embed a browser in your application to easily display various web pages. Next, let's learn a simple usage. Create a WebViewTest project and modify the code in activity_main.xml as follows:
Then modify the code in MainActivi
Android 19 (WebView usage), androidwebview
Android provides a WebView control, which enables you to embed a browser in your application to easily display various web pages. Next, let's learn a simple usage. Create a WebViewTest project and modify the code in activity_main.xml as follows:
Then modify the code in MainA
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
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