从自定义DataFlavor[]获取DataFlavor

Question

我想要创建一个程序，将图像从文件夹复制到剪贴板，但是图像变成黑色。

在做了一些研究之后，我发现：Clipboard copy from outlook always has black background set when retrieved as image from Java clipboard object在那里，他说使用图像\x-emf解决了这个问题。但我想不出如何从“新的TransferData (”DataFlavor/x“)中获取DataFlavor

package Package1;

import java.awt.Image;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.IOException;

import javax.swing.ImageIcon;

/** Transferable image */
public class imageSelection implements Transferable {
    private Image image;

    /** Creates a transferable object that is an image. 
     *  <p>imageSelection(Image)
     * */
    public imageSelection(Image image) {
        this.image = image;
    }

    public DataFlavor[] getTransferDataFlavors() {
        //DataFlavor[] BlackBackgroundImage = new DataFlavor[] { DataFlavor.imageFlavor }; // <--- Gives me a black background instead of transparent

        DataFlavor[] transferData = null;
        try {
            transferData =  new DataFlavor("image/x-emf"); // <---- How to get TransferData from this
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            error.displayError(e.getStackTrace(), "Error creating DataFlavor (mime type: image/x-emf)");
        }
        return transferData;
    }

    public boolean isDataFlavorSupported(DataFlavor flavor) {
        return DataFlavor.imageFlavor.equals(flavor);
    }

    public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
        if (!DataFlavor.imageFlavor.equals(flavor)) {
            throw new UnsupportedFlavorException(flavor);
        }
        return image;
    }
}

方法调用(其中emojiLocation是图像的路径)：

imageSelection imgSel = new imageSelection(new ImageIcon(emojiLocation).getImage());

提前感谢！

Answer 1

解决方案:返回新的DataFlavor[] { transferData }--抱歉遗漏了这么明显的东西。这并没有给我带来其他的问题，也不允许我获得一个透明的图像，所以我提出了一个新的问题来解决这个问题：Set clipboard to transparent image