KeyboardShrinksView 布尔值,默认为false。 设置为true,则当键盘出现在上面时,收缩WebView。The WebView shrinks instead of the viewport shrinking and the page scrollable. This applies to apps that position their elements relative to the bottom of the WebView. This is the default behaviour on Android, and makes a lot of sense when building apps as opposed to webpages.