使用 JavaFX 从图像的 ArrayList 中进行幻灯片放映 [英] Slideshow from an ArrayList of images with JavaFX

问题描述

我正在尝试通过获取图像的 ArrayList 并使用 for 循环将它们放入 ImageView 来创建幻灯片.但是，为了暂停"程序以便每个图像都可见，我尝试使用 Thread.sleep.不幸的是，这并没有达到预期的效果.为了解决这个问题，我无休止的谷歌搜索使我怀疑我应该使用 Timeline 类，但我不知道如何实现它.任何帮助将非常感激.我功能失调的代码看起来像这样:

I'm trying to create a slideshow by taking an ArrayList of images and putting them into an ImageView using a for loop. However, in order to "pause" the program so that each image will be visible, I am trying to use Thread.sleep. This unfortunately hasn't had the desired effect. In trying to remedy this, my endless googling leads me to suspect that I should be using the Timeline class, but I have no idea how to implement it. Any help would be much appreciated. My dysfunctional code as it stands looks like this:

for (int i = 0; i < imageArrayList.size(); i++) {
    try {
        Thread.sleep(1000);
    } catch (Exception e) {
        System.out.println("Error: " + e.toString());
    }
    slideshowImageView.setImage(imageArrayList.get(i));
}

推荐答案

在谷歌上搜索了很长时间后想到了

Figured it after a good long while of googling

    int count; //declared as global variable         



//then the working logic in my eventhandler
    Task task = new Task<Void>() {
            @Override
            public Void call() throws Exception {
                 for (int i = 0; i < imageArrayList.size(); i++) {
                     Platform.runLater(new Runnable() {
                         @Override
                         public void run() {
                              slideshowImageView.setImage(imageArrayList.get(slideshowCount));
                              slideshowCount++;
                              if (slideshowCount >= imageArrayList.size()) {
                                  slideshowCount = 0;
                              }
                         }
                      });

                     Thread.sleep(1000);
                  }
                  return null;
            }
            };
            Thread th = new Thread(task);
            th.setDaemon(true);
            th.start();

    });

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