java - 如何用java制作一个 “do not ask me again”的对话框弹出框？

Question

在我的程序的一部分中，我使用 JOptionPane 询问用户是否确定他将要做什么。但我不想让用户每次尝试都这样问，所以我喜欢使用 android 中带有“不再询问”的一些对话框的功能，但不知道如何在我的程序中实现它，这里有人可以帮助我吗？(应该有西类牙语 StackOverflow)这是我的代码

if (jCheckBox2.isSelected() && jCheckBox1.isSelected()){
        JOptionPane.showConfirmDialog(null, "This action can cause problems, want to do it?");
        //here must be something to never ask again this 

    }

Answer 1

基本思想是利用 message 参数实际上可以是 Component 这一事实。然后问题归结为检查用户是否选择了“不要再问我”选项，存储并重新使用它

有点像...

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.FlowLayout;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.util.Properties;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class DontAskMeAgainPanel extends JPanel {

    private JCheckBox dontAskMeAgain;

    public DontAskMeAgainPanel(Object message) {
        setLayout(new BorderLayout());
        if (message instanceof Component) {
            add((Component) message);
        } else if (message != null) {
            add(new JLabel(message.toString()));
        }
        dontAskMeAgain = new JCheckBox("Don't ask me again");
        JPanel panel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
        panel.add(dontAskMeAgain);
        add(panel, BorderLayout.SOUTH);
    }

    public boolean dontAskMeAgain() {
        return dontAskMeAgain.isSelected();
    }

    private static Properties settings;

    protected static void loadProperties() {
        if (settings != null) {
            settings = new Properties();
            File source = new File("...");
            if (source.exists()) {
                try (Reader r = new FileReader(source)) {
                    settings.load(r);
                } catch (IOException exp) {
                    exp.printStackTrace();
                }
            }
        }
    }

    protected static void saveProperties() {
        if (settings != null) {
            settings = new Properties();
            File source = new File("...");
            try (Writer w = new FileWriter(source)) {
                settings.store(w, "Don't prompt for settings");
            } catch (IOException exp) {
                exp.printStackTrace();
            }
        }
    }

    public static int showConfirmDialog(Component parent, Object message, String key) {

        loadProperties();

        int result = JOptionPane.NO_OPTION;

        if (settings.containsKey(key + ".prompt") && !Boolean.parseBoolean(settings.getProperty(key + ".value"))) {
            result = Integer.parseInt(settings.getProperty(key + ".value"));
        } else {
            DontAskMeAgainPanel panel = new DontAskMeAgainPanel(message);
            result = JOptionPane.showConfirmDialog(parent, panel);
            if (panel.dontAskMeAgain()) {
                settings.put(key + ".prompt", "false");
                settings.put(key + ".value", Integer.toString(result));

                saveProperties();
            }
        }
        return result;
    }

}

作为基本起点。为简单起见，我使用 Properties 作为后备存储，您可以使用数据库或其他持久方法(Preferences、XML 等)

然后你就可以像这样使用它了......

int result = DontAskMeAgainPanel.showConfirmDialog(null, "This is annoying", "Annoying");
System.out.println("You selected " + result);
result = DontAskMeAgainPanel.showConfirmDialog(null, "This is annoying", "Annoying");
System.out.println("Then you selected " + result);

如果您在第一次提示时选择“不再询问我”，那么第二次调用将返回之前选择的值

现在，在某个地方，您可能希望能够扭转这些决定；)