WebView is a very important control in android. Its function is to display a web page. The kernel it uses is the webkit engine. After version 4.4, Chrome is directly used as the built-in web browser.
Function(Recommended learning: Java video tutorial)
Display and render web pages;
Can interact with page JavaScript to achieve hybrid development.
Introduction to use
Before using WebView, don’t forget to declare network access permissions in the manifest file:
<uses-permission android:name="android.permission.INTERNET"/>
The loading page generally has the following Several forms:
//方式一:加载一个网页 webView.loadUrl("http://www.baidu.com"); //方式二:加载应用资源文件内的网页 webView.loadUrl("file:///android_asset/test.html"); //方式三:加载一段代码 webView.loadData(String data,String mimeType, String encoding);
Among them, method one and method two are easier to understand. Method three may not be understood by some friends, so I will explain it here.
WebView.loadData() and WebView.loadDataWithBaseURL() represent loading a certain piece of code. Among them, WebView.loadDataWithBaseURL() has better compatibility and is applicable to more scenarios. Therefore, I will focus on introducing this method.
WebView.loadDataWithBaseURL(String baseUrl, String data, String mimeType, String encoding, String historyUrl)) has five parameters: baseUrl represents the basic web page, data represents the content to be loaded, and mimeType represents the type of web page to be loaded. , encoding represents the encoding format, historyUrl represents the available history records, and can be a value.
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