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Applications that retrieve and display content from the Web often end up displaying that data on the screen. Instead of customizing various screens with custom controls, Android applications can simply use the WebView control to display web content to the screen. You can think of the WebView control as a browser-like view.
The WebView control uses the WebKit rendering engine to draw HTML content on the screen. This content could be HTML pages on the Web or it can be locally sourced. WebKit is an open source browser engine. You can read more about it on its official website at http://webkit.org.