ass*_*ias 5 javafx webview javafx-2
我试图根据WebEngine的javadoc中的最后一个例子(从JavaScript调用Java)创建一个从Javascript到Java的回调的简单示例.但是,当我单击WebView中的链接时,不会调用Java方法,页面也会消失.
public class TestOnClick extends Application {
@Override
public void start(Stage stage) throws Exception {
try {
final WebView webView = new WebView();
final WebEngine webEngine = webView.getEngine();
Scene scene = new Scene(webView);
stage.setScene(scene);
stage.setWidth(1200);
stage.setHeight(600);
stage.show();
String webPage = "<html>\n"
+ " <body>\n"
+ " <a href=\"\" onclick=\"app.onClick()\">Click here</a>\n"
+ " </body>\n"
+ "</html>";
System.out.println(webPage);
webView.getEngine().loadContent(webPage);
JSObject window = (JSObject) webEngine.executeScript("window");
window.setMember("app", new JavaApp());
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
public static class JavaApp {
public void onClick() {
System.out.println("Clicked");
}
}
}
注意:在监视load worker时,我没有看到WebView中抛出任何异常 webView.getEngine().getLoadWorker().exceptionProperty().addListener(...).
您正在尝试在创建之前访问webview DOM模型.
将JavaApp相关代码包装到页面加载侦听器以实现您的目标:
webEngine.getLoadWorker().stateProperty().addListener(new ChangeListener<Worker.State>() {
@Override
public void changed(ObservableValue<? extends State> ov, State t, State t1) {
if (t1 == Worker.State.SUCCEEDED) {
JSObject window = (JSObject) webEngine.executeScript("window");
window.setMember("app", new JavaApp());
}
}
});