我無法使用url或filechooser顯示圖像。我已經實現了方法來從URL或從PC拉文件只是不知道如何顯示這些圖像。需要幫助顯示來自url或filechooser的圖像
這裏就是我所說的,從一個網址拉法:
@FXML
private void button0Action (ActionEvent event) throws IOException {
catdog c = new catdog();
String cat = c.cat();
System.out.println(cat);
輸出對話框返回的網址: http://24.media.tumblr.com/tumblr_llmbvhAcsF1qg20muo1_500.gif
這裏是我的Display類:
package screensaver;
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
public class Display extends Application {
@Override // Override the start method in the Application class
public void start(Stage primaryStage) {
GridPane pane = new GridPane();
pane.setAlignment(Pos.CENTER);
pane.setHgap(0);
pane.setVgap(0);
Scene scene = new Scene(pane);
primaryStage.setTitle("imageViewer");
primaryStage.setScene(scene);
primaryStage.show();
}
}
創建Display and ImageView的新實例:
@FXML
private void button0Action (ActionEvent event) throws IOException {
catdog c = new catdog();
String cat = c.cat();
System.out.println(cat);
Display catDisplay = new Display();
ImageView catImage = new ImageView(cat);
}
我該如何將圖像添加到窗格並調用start方法來顯示場景?我知道我可以在Display類中創建一個ImageView實例,然後將圖像添加到窗格中,但我無法從button0Action方法中拉出包含url的變量cat。目前陷入困境,不知道該從哪裏出發。過去幾天一直在努力嘗試不同的方法,但沒有運氣。有任何想法嗎?
這裏是我的變化,到目前爲止:
顯示類:發生
package screensaver;
import java.io.IOException;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.image.ImageView;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
public class Display {
public void showImage0 (String url) throws IOException {
Stage stage = new Stage();
GridPane pane = new GridPane();
pane.setAlignment(Pos.CENTER);
pane.setHgap(0);
pane.setVgap(0);
Catdog c = new Catdog();
pane.getChildren().add(new ImageView(c.cat()));
Scene scene = new Scene(pane);
stage.setTitle("imageViewer");
stage.setScene(scene);
stage.show();
}
public void showImage1 (String url) throws IOException {
Stage stage = new Stage();
GridPane pane = new GridPane();
pane.setAlignment(Pos.CENTER);
pane.setHgap(0);
pane.setVgap(0);
Catdog d = new Catdog();
pane.getChildren().add(new ImageView(d.dog()));
Scene scene = new Scene(pane);
stage.setTitle("imageViewer");
stage.setScene(scene);
stage.show();
}
public void showImage2 (String url) throws IOException {
Stage stage = new Stage();
GridPane pane = new GridPane();
pane.setAlignment(Pos.CENTER);
pane.setHgap(0);
pane.setVgap(0);
LandscapeImage lI = new LandscapeImage();
pane.getChildren().add(new ImageView(lI.imageSource));
Scene scene = new Scene(pane);
stage.setTitle("imageViewer");
stage.setScene(scene);
stage.show();
}
public void showImage3 (String file) throws IOException {
Stage stage = new Stage();
GridPane pane = new GridPane();
pane.setAlignment(Pos.CENTER);
pane.setHgap(0);
pane.setVgap(0);
FileChooser fc3 = new FileChooser();
pane.getChildren().add(new ImageView(fc3.fileChoice()));
Scene scene = new Scene(pane);
stage.setTitle("imageViewer");
stage.setScene(scene);
stage.show();
}
}
錯誤這裏爲 '無效' 類型此處不允許
pane.getChildren().add(new ImageView(fc3.fileChoice()));
這裏的文件選擇器類:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package screensaver;
import java.io.File;
import java.io.IOException;
import javafx.scene.control.Alert;
import javafx.scene.control.ButtonType;
/**
*
* @author Jacob
*/
public class FileChooser {
void fileChoice() throws IOException{
javafx.stage.FileChooser fc3 = new javafx.stage.FileChooser();
File selectedFile = fc3.showOpenDialog(null);
fc3.getExtensionFilters().addAll(
new javafx.stage.FileChooser.ExtensionFilter("Image Files", "*.png", "*.jpg", "*.gif"));
if (selectedFile != null) {
String location = (selectedFile.getAbsoluteFile().toURI().toString());
System.out.println(location);
Display ownDisplay = new Display();
ownDisplay.showImage3(location);
} else {
Alert alert = new Alert(Alert.AlertType.CONFIRMATION,"No file was selected");
alert.showAndWait()
.filter(response -> response == ButtonType.OK)
.ifPresent((ButtonType response) -> {
System.out.println("OK");
});
}
}
}
最新代碼:
顯示方法:
public void showImage3 (String file) throws IOException, Exception {
Stage stage = new Stage();
GridPane pane = new GridPane();
pane.setAlignment(Pos.CENTER);
pane.setHgap(0);
pane.setVgap(0);
pane.getChildren().add(new ImageView(file));
Scene scene = new Scene(pane);
stage.setTitle("imageViewer");
stage.setScene(scene);
stage.show();
}
button3Action方法:
@FXML
private void button3Action(ActionEvent event) throws IOException, Exception {
FileChooser fc3 = new FileChooser();
File selectedFile = fc3.showOpenDialog(null);
fc3.getExtensionFilters().addAll(
new ExtensionFilter("Image Files", "*.png", "*.jpg", "*.gif"));
if (selectedFile != null) {
String location = (selectedFile.getAbsoluteFile().toURI().toString());
System.out.println(location);
Display fileChoice = new Display();
fileChoice.showImage3(location);
} else {
Alert alert = new Alert(AlertType.CONFIRMATION,"No file was selected");
alert.showAndWait()
.filter(response -> response == ButtonType.OK)
.ifPresent((ButtonType response) -> {
System.out.println("OK");
});
}
}
你有你的**'catImage' **添加到您的(併網)**'pane' **。 **'pane.getChildren()。add(...)'**,尊重佈局。除此之外,當我看到以大寫字母開頭的變量和帶小寫字母的類(以Java表示) – Ben
知道它與urls一起工作但現在遇到filechooser問題時,它會傷害我的眼睛。 – user3440443
我真的不明白你的問題。也許你可以添加一個**構造函數**到你的顯示類,它需要貓對象/變量? (但是你的顯示類擴展了應用程序?!)你只需要一個對話框? – Ben