Question

我创建了一个无限透明的加载jframe，但是当通过调用f.setBackground（new Color（0,0,0,0））时将Background设置为透明时闪烁;如果setBackground被注释，则JFrame显示动画图标正确。

有人可以解决这个问题吗？

import java.awt.Color;
import java.awt.EventQueue;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class InfiniteLoad extends JPanel
{
    private JPanel loadingPanel() throws MalformedURLException
    {
        JPanel panel = new JPanel();
        BoxLayout layoutMgr = new BoxLayout(panel, BoxLayout.PAGE_AXIS);
        panel.setLayout(layoutMgr);

        java.net.URL imageURL = new URL("http://oi59.tinypic.com/106a6vo.jpg");
        ImageIcon imageIcon = new ImageIcon(imageURL);
        JLabel iconLabel = new JLabel();
        iconLabel.setIcon(imageIcon);
        imageIcon.setImageObserver(iconLabel);

        JLabel label = new JLabel("Loading...");
        panel.add(iconLabel);
        panel.add(label);
        panel.setOpaque(false);
        return panel;
    }

    public static void main(String[] args) throws MalformedURLException
    {
        EventQueue.invokeLater(new Runnable()
        {
            @Override
            public void run()
            {
                JFrame f = new JFrame("Window");
                f.setUndecorated(true);

                //AWTUtilities.setWindowOpacity(f, 0.6f);
                //f.setOpacity(0.4f);

                InfiniteLoad imagePanel = new InfiniteLoad();
                JPanel jp = null;
                try
                {
                    jp = imagePanel.loadingPanel();
                }
                catch (MalformedURLException ex)
                {
                    Logger.getLogger(InfiniteLoad.class.getName()).log(Level.SEVERE, null, ex);
                }

                f.setContentPane(jp);
                f.setBackground(new Color(0, 0, 0, 0)); //<-- THIS CAUSES FLICKERING
                f.pack();
                f.setVisible(true);
            }
        });
    }
}

修改

Ok问题与OpenJDK Java有关，它显示了

提到的问题

java version "1.7.0_55"
OpenJDK Runtime Environment (IcedTea 2.4.7) (7u55-2.4.7-1ubuntu1~0.13.10.1)
OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode)

用

运行时

java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)

显示正确。如果任何人都可以展示一种解决方法，使其在错误实施下也能正常工作，那么欢迎您。

Answer 1

抱歉，我不明白......哪个按钮？我的代码中没有按钮

我总是在未修饰的JButton中测试动画图像（可能是我的坏习惯之一）
找不到（不是最深入的研究）保存为JPEG的良好动画图像有效（所有都是透明的，在我的帖子中没有任何东西可以从代码中看到，然后没有任何闪烁）
动画GIF无法解决问题

码

import com.sun.awt.AWTUtilities;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Insets;
import java.net.MalformedURLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
//http://stackoverflow.com/q/24797774/714968
public class InfiniteLoad extends JPanel {

    private JPanel loadingPanel() throws MalformedURLException {
        JPanel panel = new JPanel();
        BoxLayout layoutMgr = new BoxLayout(panel, BoxLayout.PAGE_AXIS);
        panel.setLayout(layoutMgr);
        ImageIcon imageIcon = new ImageIcon((getClass().getResource("/Images/smiley_018.gif")));
        JButton button = new JButton();
        button.setBorderPainted(false);
        button.setBorder(null);
        button.setFocusable(false);
        button.setMargin(new Insets(0, 0, 0, 0));
        button.setContentAreaFilled(false);
        button.setIcon(imageIcon);
        JLabel myLabel = new JLabel(imageIcon);
        JLabel label = new JLabel("Loading...", JLabel.CENTER);
        panel.add(button);
        panel.add(label);
        panel.add(myLabel);
        panel.setOpaque(false);
        return panel;
    }

    public static void main(String[] args) throws MalformedURLException {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame f = new JFrame("Window");
                f.setUndecorated(true);
                //AWTUtilities.setWindowOpacity(f, 0.1f);
                //f.setOpacity(0.1f);
                InfiniteLoad imagePanel = new InfiniteLoad();
                JPanel jp = null;
                try {
                    jp = imagePanel.loadingPanel();
                } catch (MalformedURLException ex) {
                    Logger.getLogger(InfiniteLoad.class.getName()).log(Level.SEVERE, null, ex);
                }
                f.setContentPane(jp);
                f.setBackground(new Color(0, 0, 0, 0)); //<-- THIS CAUSES FLICKERING
                f.pack();
                f.setVisible(true);
            }
        });
    }
}

Java Swing透明无限加载/加载动画闪烁

1 个答案: