Question

我正在开发Java FX应用程序，并且我想在运行时在视图中根据输入数字显示多个图像。我尝试在我的控制器类中执行此操作，但它没有显示图像。

private ImageView[] raccogliImg(){
    File file = new File("application/fotovoltaico1.jpg");
    for(int i=0; i<v.length; i++) {
        v[i] = new ImageView(new Image(file.toURI().toString()));
        anchor.getChildren().add(v[i]);
        anchor.requestLayout();
    }
    return v;
} 

@FXML
void onClick(ActionEvent event) {
    raccogliImg();
}

这是控制器类代码

public class Controller {

public ImageView[] v = new ImageView[6];

@FXML
private ResourceBundle resources;

@FXML
private URL location;

@FXML
private Button button;


@FXML
private Pane pane;

private ImageView[] raccogliImg(){
    String file = "application/fotovoltaico1.jpg";
    Image img = new Image(file);
    for(int i=0; i<v.length; i++) {
        v[i] = new ImageView(img);
        pane.getChildren().add(v[i]);
        pane.requestLayout();
    }
    return v;
} 

@FXML
void onClick(ActionEvent event) {
    raccogliImg();  
 }



@FXML
void initialize() {
    assert button != null : "fx:id=\"button\" was not injected: check your FXML file 'prova.fxml'.";
}

}

Answer 1

您的代码无法正确获取图片。

String file = "application/fotovoltaico1.jpg";
Image image = new Image(file);
ImageView iv = new ImageView(image);

这将有效。

Answer 2

我只是复制粘贴你的代码并修复为可编译和可运行。使用VBox代替Pane，使图像不会重叠。它没有问题：

public class JavaFXApplication extends Application
{
    public ImageView[] v = new ImageView[6];
    private VBox pane = new VBox();

    @Override
    public void start( Stage stage )
    {
        raccogliImg();
        stage.setScene( new Scene( pane ) );
        stage.show();
    }

    private ImageView[] raccogliImg()
    {
        String file = "javafxapplication/applelogo.png";
        Image img = new Image( file );
        for ( int i = 0; i < v.length; i++ )
        {
            v[i] = new ImageView( img );
            pane.getChildren().add( v[i] );
            pane.requestLayout();
        }
        return v;
    }

    public static void main( String[] args )
    {
        Application.launch( JavaFXApplication.class, args );
    }

}

所以你的问题出在不同的地方。

在运行时设置ImageView

2 个答案: