问题
I suppose it's a very simple thing but I just can't get behind it. All I want is to show an image over an ImageView linked to fxml. Here is my code:
package application;
import java.io.File;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.AnchorPane;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
public class Main extends Application
{
@FXML
private ImageView imageView;
@Override
public void start(Stage primaryStage)
{
try
{
AnchorPane root = (AnchorPane)FXMLLoader.load(getClass().getResource("Sample.fxml"));
Scene scene = new Scene(root,400,400);
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
primaryStage.setTitle("Hello World");
File file = new File("src/Box13.jpg");
Image image = new Image(file.toURI().toString());
imageView = new ImageView(image);
//root.getChildren().add(imageView);
primaryStage.setScene(scene);
primaryStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
}
And my fxml file
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import javafx.scene.image.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane prefHeight="316.0" prefWidth="321.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="application.SampleController">
<children>
<ImageView fx:id="imageView" fitHeight="150.0" fitWidth="200.0" layoutX="61.0" layoutY="83.0" pickOnBounds="true" preserveRatio="true" >
</ImageView>
</children>
</AnchorPane>
There should be no problem with the file linking as it works fine when I include the outcommented line. This would be the way it's done in java only but I want to use fxml here as I am using fxml for all other components but it just doesn't work for the ImageView and I don't know why. I have also tried to create a new controller class and link the ImageView there but that neither works. Can anyone help me?
Thanks
回答1:
If you want to use FXML, you should separate the controller (like you were doing with the SampleController). Then your fx:controller in your FXML should point to that.
Probably you are missing the initialize method in your controller, which is part of the Initializable interface. This method is called after the FXML is loaded, so I recommend you to set your image there.
Your SampleController class must be something like this:
public class SampleController implements Initializable {
@FXML
private ImageView imageView;
@Override
public void initialize(URL location, ResourceBundle resources) {
File file = new File("src/Box13.jpg");
Image image = new Image(file.toURI().toString());
imageView.setImage(image);
}
}
I tested here and it's working.
回答2:
You don't need an initializer, unless you're dynamically loading a different image each time. I think doing as much as possible in fxml is more organized. Here is an fxml file that will do what you need.
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import javafx.scene.image.*?>
<?import javafx.scene.layout.*?>
<AnchorPane
xmlns:fx="http://javafx.co/fxml/1"
xmlns="http://javafx.com/javafx/2.2"
fx:controller="application.SampleController"
prefHeight="316.0"
prefWidth="321.0"
>
<children>
<ImageView
fx:id="imageView"
fitHeight="150.0"
fitWidth="200.0"
layoutX="61.0"
layoutY="83.0"
pickOnBounds="true"
preserveRatio="true"
>
<image>
<Image
url="src/Box13.jpg"
backgroundLoading="true"
/>
</image>
</ImageView>
</children>
</AnchorPane>
Specifying the backgroundLoading property in the Image tag is optional, it defaults to false. It's best to set backgroundLoading true when it takes a moment or longer to load the image, that way a placeholder will be used until the image loads, and the program wont freeze while loading.
回答3:
@FXML
ImageView image;
@Override
public void initialize(URL url, ResourceBundle rb) {
image.setImage(new Image ("/about.jpg"));
}
回答4:
The Code part :
Image imProfile = new Image(getClass().getResourceAsStream("/img/profile128.png"));
ImageView profileImage=new ImageView(imProfile);
in a javafx maven:
回答5:
Please find below example to load image using JavaFX.
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class LoadImage extends Application {
public static void main(String[] args) {
Application.launch(args);
}
@Override
public void start(Stage primaryStage) {
primaryStage.setTitle("Load Image");
StackPane sp = new StackPane();
Image img = new Image("javafx.jpg");
ImageView imgView = new ImageView(img);
sp.getChildren().add(imgView);
//Adding HBox to the scene
Scene scene = new Scene(sp);
primaryStage.setScene(scene);
primaryStage.show();
}
}
Create one source folder with name Image in your project and add your image to that folder otherwise you can directly load image from external URL like following.
Image img = new Image("http://mikecann.co.uk/wp-content/uploads/2009/12/javafx_logo_color_1.jpg");
回答6:
It's recommended to put the image to the resources, than you can use it like this:
imageView = new ImageView("/gui.img/img.jpg");
回答7:
src/sample/images/shopp.png
**
Parent root =new StackPane();
ImageView ımageView=new ImageView(new Image(getClass().getResourceAsStream("images/shopp.png")));
((StackPane) root).getChildren().add(ımageView);
**
来源：https://stackoverflow.com/questions/22710053/how-can-i-show-an-image-using-the-imageview-component-in-javafx-and-fxml