What is the use of webview implementation?

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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