（JavaFX）如何使用基本的Java類在以fxml文件編碼的ImageView中更改圖片？

Question

我當前正在編寫一個程序，我想單擊一個按鈕，然后它運行另一個類，並且根據該類的輸出，我希望與單擊的按鈕在同一場景上的圖像視圖被更改。 我已經將所有代碼編碼到輸出更改圖像的程度。 我該怎么做呢？

Java類

public static void USPSCase() {
        printUSPS();
    }

    public static void printUSPS(){
        Random rand = new Random();
        int gunSelect = rand.nextInt(99)+1;

        if(gunSelect<=30){ //Calculates which gun you will get
            LeadConduitUSPS(CaseSpinners.USPSCaseSpinController.setUSPImage);
        }
        else if(gunSelect>=31 && gunSelect<=60){
            NightOpsUSPS();
        }
        else if(gunSelect>=61 && gunSelect<=90){
            TorqueUSPS();
        }
        else if(gunSelect>=91 && gunSelect<=93.5){
            GuardianUSPS();
        }
        else if(gunSelect>=94.5 && gunSelect<=97){
            CyrexUSPS();
        }
        else if(gunSelect>=98 && gunSelect<=99){
            CaimanUSPS();
        }
        else if(gunSelect==100){
            KillConfirmedUSPS();
        }


    }

//some code... these two methods are connected
                    public static void LeadConduitUSPS(ImageView setUSPImage){
        System.out.println("Lead Conduit");

        Random rand = new Random();
        int wareSelect = rand.nextInt(99)+1;

if(wareSelect<=10){ //Calculates the ware the gun has
            setUSPImage.setImage(new Image("csgocaseopener/icon.png"));
        }
        else if(wareSelect>=11 && wareSelect<=25){
            setUSPImage.setImage(new Image("csgocaseopener/icon.png"));
        }
        else if(wareSelect>=26 && wareSelect<=60){
            setUSPImage.setImage(new Image("csgocaseopener/icon.png"));
        }
        else if(wareSelect>=61 && wareSelect<=80){
            setUSPImage.setImage(new Image("csgocaseopener/icon.png"));
        }
        else if(wareSelect>=81){
            setUSPImage.setImage(new Image("csgocaseopener/icon.png"));
        }
    }

fxml文件

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="CaseSpinners.USPSCaseSpinController">
   <children>
      <ImageView fitHeight="400.0" fitWidth="600.0" pickOnBounds="true">
         <image>
            <Image url="@../csgocaseopener/back.png" />
         </image>
      </ImageView>
      <ImageView fx:id="spinmechback" fitHeight="45.0" fitWidth="45.0" onMouseClicked="#handleSpinMechBack" pickOnBounds="true" preserveRatio="true" AnchorPane.leftAnchor="0.0" AnchorPane.topAnchor="-1.0">
         <image>
            <Image url="@../csgocaseopener/backbtn.png" />
         </image>
      </ImageView>
      <Button fx:id="SpinUSPS" layoutX="235.0" layoutY="301.0" mnemonicParsing="false" onAction="#SpinUSPSCase" text="SPIN">
         <font>
            <Font name="System Bold" size="36.0" />
         </font>
      </Button>
      <ImageView fx:id="setAWPImage" fitHeight="200.0" fitWidth="200.0" layoutX="201.0" layoutY="100.0" pickOnBounds="true" preserveRatio="true">
         <image>
            <Image url="@../csgocaseopener/bprof.png" />
         </image></ImageView>
   </children>
</AnchorPane>

fxml控制器

public class USPSCaseSpinController implements Initializable {

        @FXML
        public static ImageView setUSPImage;

        @FXML
        private void handleSpinMechBack(MouseEvent event) throws IOException{
        Parent handleInventoryBackParent = FXMLLoader.load(getClass().getResource("/csgocaseopener/OpenCase.fxml"));
        Scene OPBackScene = new Scene(handleInventoryBackParent);
        Stage handleInventoryBackStage = (Stage) ((Node) event.getSource()).getScene().getWindow();
        handleInventoryBackStage.setScene(OPBackScene);
        handleInventoryBackStage.show();
        }

        @FXML
        private void SpinUSPSCase(ActionEvent event) throws IOException{
            test test = new test();
            test.LeadConduitUSPS(setUSPImage);
        }
        @FXML
        public void SetUSPImage(){
            setUSPImage.setImage(new Image("AWPCase.png"));
        }

    @Override
    public void initialize(URL url, ResourceBundle rb) {
        // TODO
    }   
}

Answer 1

首先在支持者類中為LeadConduitUSPS()創建參數化方法。 像這樣，

public static void LeadConduitUSPS(ImageView image){
    System.out.println("Lead Conduit");

    Random rand = new Random();
    int wareSelect = ((int)(rand.nextDouble() * 99)) +1;

    if(wareSelect<=10){ //Calculates the ware the gun has
        System.out.println("Factory New");
    }
    else if(wareSelect>=11 && wareSelect<=25){
        //Changes Image here!!
        image.setImage(new Image("new_image1.png");
    }
    else if(wareSelect>=26 && wareSelect<=60){
        //Changes Image here!!
        image.setImage(new Image("new_image2.png");
    }
    else if(wareSelect>=61 && wareSelect<=80){
        //Changes Image here!!
        image.setImage(new Image("new_image3.png");
    }
    else if(wareSelect>=81){
        //Changes Image here!!
        image.setImage(new Image("new_image4.png");
    }
}

然后從Controller類的SpinUSPSCase()調用LeadConduitUSPS()方法，

public class USPSCaseSpinController implements Initializable {

    @FXML
    private ImageView setUSPImage;

    @FXML
    private void handleSpinMechBack(MouseEvent event) throws IOException{
    Parent handleInventoryBackParent = FXMLLoader.load(getClass().getResource("/csgocaseopener/OpenCase.fxml"));
    Scene OPBackScene = new Scene(handleInventoryBackParent);
    Stage handleInventoryBackStage = (Stage) ((Node) event.getSource()).getScene().getWindow();
    handleInventoryBackStage.setScene(OPBackScene);
    handleInventoryBackStage.show();
    }

    @FXML
    private void SpinUSPSCase(ActionEvent event) throws IOException{

        //call from here
        YourAnotherClass test = new YourAnotherClass();
        test.LeadConduitUSPS(USPImage);
    }

    @FXML
    public void SetUSPImage(){
        setUSPImage.setImage(new Image("AWPCase.png"));
    }

    @Override
    public void initialize(URL location, ResourceBundle resources) {

    } 
}

Answer 2

您可以將FXML提供的ImageView實例（USPImage）傳遞給LeadConduitUSPS(ImageView imgView)方法。 然后，您可以在相關類imgView Image設置為此imgView 。 希望它是有用的。