java - Android 喜欢 Toast in Swing

Question

我正在尝试在我的 Swing 应用程序中开发类似 Toast (Android) 的功能。作为一个独立的，它工作完美。但是当集成到应用程序中时，它会带来问题。

类文件是:

import java.awt.*;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.geom.RoundRectangle2D;
import javax.swing.ImageIcon;
import javax.swing.JDialog;
import javax.swing.JLabel;
import net.mindcrew.utils.LayoutHelper.Packer;

public class Toast extends JDialog {

    String text;

    public Toast(String text) {
        this.text = text;
        initComponents();
    }

    private void initComponents(){
        setLayout(new GridBagLayout());
        addComponentListener(new ComponentAdapter() {
            // Give the window an rounded rect shape. LOOKS GOOD
            // If the window is resized, the shape is recalculated here.
            @Override
            public void componentResized(ComponentEvent e) {
                setShape(new RoundRectangle2D.Double(0,0,getWidth(),getHeight(),50,50));
            }
        });

        setUndecorated(true);
        setSize(300,100);
        setLocationRelativeTo(null);
        getContentPane().setBackground(Color.BLACK);

        // Determine what the GraphicsDevice can support.
        GraphicsEnvironment ge = 
            GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice gd = ge.getDefaultScreenDevice();
        final boolean isTranslucencySupported = 
            gd.isWindowTranslucencySupported(GraphicsDevice.WindowTranslucency.TRANSLUCENT);

        //If shaped windows aren't supported, exit.
        if (!gd.isWindowTranslucencySupported(GraphicsDevice.WindowTranslucency.PERPIXEL_TRANSPARENT)) {
            System.err.println("Shaped windows are not supported");
        }

        //If translucent windows aren't supported, 
        //create an opaque window.
        if (!isTranslucencySupported) {
            System.out.println(
                "Translucency is not supported, creating an opaque window");
        }

        // Set the window to 70% translucency, if supported.
        if (isTranslucencySupported) {
            setOpacity(0.9f);
        }

        ImageIcon loading = new ImageIcon(Toast.class.getResource("/net/mindcrew/utils/userinterface/resources/loading-photo.gif"));

        JLabel label = new JLabel(text);
        label.setForeground(Color.WHITE);
        label.setIcon(loading);
        Packer packer = new Packer(this);
        packer.pack(label).fillboth().west().inset(0, 50, 0, 20);
    }

    public static Toast showDailog(String textToDisplay){
        final Toast toast = new Toast(textToDisplay);
        // Display the window.
        Thread thread = new Thread(new Runnable() {
            @Override
            public void run() {
                toast.setVisible(true);
            }
        });
        thread.start();
        return toast;
    }

    @Override
    public void hide(){
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                setVisible(false);
                dispose();
            }
        });
    }

    public static void main(String... args){
        Toast toast = Toast.showDailog("Display");
        try{
            Thread.sleep(5000);
        }
        catch (Exception e){}
        toast.hide();
    }

}

可能会有一些实现上的错误，但这是基本的。

这很好用。但是，当我尝试以资源密集型操作的方式进行设置时，它会跳闸。由于 GIF 动画没有显示，我认为这意味着它有点停滞了。

用途是:

  Toast toast = Toast.showDailog("Generating PDF");

//resource intensive operation. Takes about 3-5seconds to execute

    toast.hide();

更让我痛苦的是，即使在处理完“Toast”之后，应用程序也变得非常慢。我很确定速度变慢不是因为有问题的操作，因为如果我取消“ toast ”，它会完美地工作。

有人可以指出这里有什么问题吗？？？

我经历了this question .但是那里的东西比我要找的要复杂得多。我正在寻找的是一个简单的对话框。不是一个完整的框架，需要容纳多个组件。

Answer 1

试试这段代码:

public class Test extends JFrame {

    private JPanel contentPane;

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Test frame = new Test();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public Test() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        contentPane.setLayout(new BorderLayout(0, 0));
        setContentPane(contentPane);

        JButton btnTestToast = new JButton("Test Toast");
        btnTestToast.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                ToastMessage toastMessage = new ToastMessage("Sample text to toast ",3000);
                toastMessage.setVisible(true);
            }
        });
        contentPane.add(btnTestToast, BorderLayout.SOUTH);
    }

}

public class ToastMessage extends JDialog {
    int miliseconds;
    public ToastMessage(String toastString, int time) {
        this.miliseconds = time;
        setUndecorated(true);
        getContentPane().setLayout(new BorderLayout(0, 0));

        JPanel panel = new JPanel();
        panel.setBackground(Color.GRAY);
        panel.setBorder(new LineBorder(Color.LIGHT_GRAY, 2));
        getContentPane().add(panel, BorderLayout.CENTER);

        JLabel toastLabel = new JLabel("");
        toastLabel.setText(toastString);
        toastLabel.setFont(new Font("Dialog", Font.BOLD, 12));
        toastLabel.setForeground(Color.WHITE);

        setBounds(100, 100, toastLabel.getPreferredSize().width+20, 31);


        setAlwaysOnTop(true);
        Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
        int y = dim.height/2-getSize().height/2;
        int half = y/2;
        setLocation(dim.width/2-getSize().width/2, y+half);
        panel.add(toastLabel);
        setVisible(false);

        new Thread(){
            public void run() {
                try {
                    Thread.sleep(miliseconds);
                    dispose();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }.start();
    }
}