JAVAFX - 在主fxml中加载带有anchorpane的fxml [英] JAVAFX - Load fxml with anchorpane inside main fxml
问题描述
我正在尝试在主fxml中加载一个fxml文件（内容区域）。
I'm trying to load a fxml file (content area) inside a main fxml.
由于代码被多个文件分割，我无法放在这里所有代码，但如果需要，我将构建一个问题的小版本。我只放置相关的代码部分。
As the code is splited by several files i can't place here all code but if needed i will build a small version with the problem. I only place the relevant parts of code.
主fxml文件
...
</MenuBar>
<AnchorPane fx:id="mainContent" prefHeight="-1.0" prefWidth="-1.0" VBox.vgrow="ALWAYS" />
<ToolBar prefHeight="25.0" VBox.vgrow="NEVER" />
</children>
</VBox>
内容fxml （注意一下anchorpane id）
Content fxml (take in attention the anchorpane id)
...
<AnchorPane id="background" prefHeight="600.0" prefWidth="800.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2">
<children>
<Label minWidth="400.0" prefWidth="423.0" text="Tools" textAlignment="CENTER" textFill="WHITE" textOverrun="CLIP" AnchorPane.rightAnchor="14.0" AnchorPane.topAnchor="14.0">
<effect>
<Glow level="1.0" />
</effect>
<font>
<Font name="Verdana Bold" size="45.0" />
</font>
</Label>
<Label text="Version 0.01 alfa" textFill="WHITE" AnchorPane.rightAnchor="140.0" AnchorPane.topAnchor="69.0">
<font>
<Font name="Verdana" size="20.0" />
</font>
</Label>
<Label text="2014 - José Longo" textFill="WHITE" AnchorPane.bottomAnchor="14.0" AnchorPane.leftAnchor="14.0" />
</children>
<effect>
<InnerShadow />
</effect>
</AnchorPane>
MainApp.java
MainApp.java
...
@Override
public void start(Stage stage) throws Exception {
FXMLLoader loader = new FXMLLoader();
AnchorPane mainScreen = (AnchorPane) loader.load(MainApp.class.getResource("/net/somewhere/fxml/Scene.fxml"));
Scene scene = new Scene(mainScreen);
scene.getStylesheets().add("/net/somewhere/styles/Styles.css");
FXMLController mainController = loader.getController();
ScreenNavigator.setMainControler(mainController);
ScreenNavigator.setContent(ScreenNavigator.BACKGROUND); // if i remove/comment this the stage apears ok
stage.setTitle("Tools");
stage.setScene(scene);
stage.show();
}
控制器类
public void setScreen(AnchorPane anchorPane){
mainContent.getChildren().clear();
mainContent.getChildren().addAll(anchorPane);
}
内容控制器
public class ScreenNavigator {
//fxml files
public static final String BACKGROUND = "/net/somewhere/fxml/Background.fxml";
private static FXMLController mainController;
public static void setMainControler(FXMLController mainController){
ScreenNavigator.mainController = mainController;
}
public static void setContent(String fxmlFile){
try {
URL url = ScreenNavigator.class.getResource(fxmlFile);
FXMLLoader loader = new FXMLLoader();
loader.setLocation(url);
loader.setBuilderFactory(new JavaFXBuilderFactory());
AnchorPane content = (AnchorPane) loader.load(url.openStream());
System.out.println(content.getId()); //not null the object i can get the id
mainController.setScreen(content); // i get java.lang.NullPointerException at net.somewhere.controllers.ScreenNavigator.setContent(ScreenNavigator.java:40)
} catch (IOException ex) {
Logger.getLogger(ScreenNavigator.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
当尝试运行我得到这个错误：
And when try to run i get this error:
--- exec-maven-plugin:1.2.1:exec (default-cli) @ Tools ---
background <---- i can get the id of anchorpane
Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.javafx.main.Main.launchApp(Main.java:698)
at com.javafx.main.Main.main(Main.java:871)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:403)
at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:47)
at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:115)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.NullPointerException
at net.somewhere.controllers.ScreenNavigator.setContent(ScreenNavigator.java:40) <----
at net.somewhere.MainApp.start(MainApp.java:30)
at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:319)
at com.sun.javafx.application.PlatformImpl$5.run(PlatformImpl.java:219)
at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:182)
at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:179)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:179)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:76)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:17)
at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:67)
... 1 more
我已尝试使用带有Node，Pane等的getResource（），getResourceAsStream（）...最后以此处的示例结束这个网站，但没有成功...总是得到这种类型的错误...
I have tried with getResource(), getResourceAsStream() with Node, Pane, etc... and finally ended with a example present here at this site, but without success... always get this type of error...
有人能指出我解决这个问题的方向吗？
Can someone point me a direction to solve this problem?
TIA
JL
推荐答案
在与代码进行一些争斗后，我终于找到了解决方案...
After some "fights" with the code i finally found a solution...
对于那些正在寻找方式的人，我提供了一个完整的示例netbeans项目您可以这里
For the ones as me who are looking for a way i provide a full example netbeans project you can get here
简单工作示例的屏幕：
Screens of simple working example:
我无法发布图片...
链接
I can't post images yet... links for them
如果你去Hel p->关于您将获得以下屏幕上的帮助内容
If you go to "Help-> About" you will get the help content as on screen below
评论链接...
如果您点击此屏幕上的关闭按钮，您将获得初始屏幕。
If you hit button "Close" on this screen, you will get initial screen.
问候
JL
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