Java me J2ME（LWiit）-未调用actionPerformed

我有两个Lwiit

表单

s（主密码和更改密码）
一个使用

actionPerformed

调用另一个，它就工作了。
然后，在第二个示例中，我需要获取一些数据，进行处理并返回到第一个示例。
为此，我尝试再次使用

actionPerformed

。但Ok按钮（手机上的右键）不会调用更改密码表单的

操作执行

。只需调用主

表单的
actionPerformed
。为什么?

在代码的其他部分，我也这样做，但是使用
MIDlet
，并且只有一个
表单
，它就可以工作了

有什么需要改变的吗？

我在测试代码时浪费了很多时间，但我找不到解决方案

这是“Main”表单的代码：

public class InfoView extends Form implements ActionListener{

    private Command backCommand;
    private Command changePasswordCommand;
    private Command okChangePasswordForm;

     private ChangePassword changePasswordForm;

    public InfoView(Command backC){

        super();

        this.addCommand(backC);
        this.setBackCommand(backC);

        this.setScrollableY(true);

        this.setTitle(LanguageManager.getText("RootTitle"));

        changePasswordCommand = new Command(LanguageManager.getText("ChangePassword"), Constants.CHANGE_PASSWORD_COMMAND);

        okChangePasswordForm = new Command(LanguageManager.getText("Ok"), Constants.OK_CHANGE_PASSWORD_COMMAND);

        this.addAllCommands();       

        this.initForm();
    }

    public void initForm(){

        Style s = this.getStyle();

        s.setMargin(0, 0, 0, 0);
        s.setPadding(0, 0, 0, 0);

        this.addCommandListener(this);

        backCommand = new Command(LanguageManager.getText("Back"), Constants.BACK_COMMAND);

    }

    private void addAllCommands(){

        this.addCommand(changePasswordCommand);

        this.addCommand(changeContactInfoCommand);
    }

    public void actionPerformed(ActionEvent arg0) {

        //Obtengo la Opción seleccionada
        Command cmd = arg0.getCommand();

        if (cmd == null) {
            return;
        }

        System.out.println(String.valueOf(cmd.getId()));

        switch (cmd.getId()) {

            case Constants.CHANGE_PASSWORD_COMMAND:

                System.out.println("CHANGE_PASSWORD_COMMAND");

                //this.setGlassPane(null);

                if (changePasswordForm == null) {
                    changePasswordForm = new ChangePassword();
                    changePasswordForm.addCommand(backCommand);
                    changePasswordForm.addCommand(okChangePasswordForm);
                    changePasswordForm.addCommandListener(this);
                    changePasswordForm.setBackCommand(backCommand);
                }

                changePasswordForm.show();
                arg0.consume();
                break;

            case Constants.BACK_COMMAND:

                System.out.println("BACK_COMMAND");

                //20111004 MB: Cuando vuelvo, desincronizo para que al 
                //cambiar de tarjeta funcione
                //protocolManager.deSync();

                addAllCommands();

                this.show();

                this.editInfoForm = null;
                this.changePasswordForm = null;

                System.gc();

                break; 

            case Constants.OK_CHANGE_PASSWORD_COMMAND:

                System.out.println("OK_CHANGE_PASSWORD_COMMAND");

                this.editInfoForm = null;

                this.show();

                System.gc();

                break;                
        }
    }
}

import com.sun.lwuit.Form;
import com.sun.lwuit.*;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.layouts.BoxLayout;
import Project.language.LanguageManager;

public class ChangePassword extends Form implements ActionListener {

    private TextField oldPassword;
    private TextField newPassword;
    private TextField repeatNewPassword;

    public ChangePassword(){

        super ();

        this.setTitle(LanguageManager.getText("ChangePasswordTitle"));

        addCommandListener(this);

        this.setLayout(new BoxLayout(BoxLayout.Y_AXIS));

        this.addComponent(new Label(LanguageManager.getText("Actual")));

        oldPassword = new TextField("");
        oldPassword.setConstraint(TextArea.PASSWORD);

        this.addComponent(oldPassword);

        this.addComponent(new Label(LanguageManager.getText("New")));

        newPassword = new TextField("");
        newPassword.setConstraint(TextArea.PASSWORD);

        this.addComponent(newPassword);

        this.addComponent(new Label(LanguageManager.getText("Repeat")));

        repeatNewPassword = new TextField("");
        repeatNewPassword.setConstraint(TextArea.PASSWORD);

        this.addComponent(repeatNewPassword);
    }

    private String getOldPass(){
        return this.oldPassword.getText();
    }

    private String getNewPass(){
        return this.newPassword.getText();
    }

    public void actionPerformed(ActionEvent arg0) {

        Command cmd = arg0.getCommand();

        String oldPasswordVar = getOldPass();
        String newPasswordVar = getNewPass();

    }

}

这是更改密码的代码表单：

public class InfoView extends Form implements ActionListener{

    private Command backCommand;
    private Command changePasswordCommand;
    private Command okChangePasswordForm;

     private ChangePassword changePasswordForm;

    public InfoView(Command backC){

        super();

        this.addCommand(backC);
        this.setBackCommand(backC);

        this.setScrollableY(true);

        this.setTitle(LanguageManager.getText("RootTitle"));

        changePasswordCommand = new Command(LanguageManager.getText("ChangePassword"), Constants.CHANGE_PASSWORD_COMMAND);

        okChangePasswordForm = new Command(LanguageManager.getText("Ok"), Constants.OK_CHANGE_PASSWORD_COMMAND);

        this.addAllCommands();       

        this.initForm();
    }

    public void initForm(){

        Style s = this.getStyle();

        s.setMargin(0, 0, 0, 0);
        s.setPadding(0, 0, 0, 0);

        this.addCommandListener(this);

        backCommand = new Command(LanguageManager.getText("Back"), Constants.BACK_COMMAND);

    }

    private void addAllCommands(){

        this.addCommand(changePasswordCommand);

        this.addCommand(changeContactInfoCommand);
    }

    public void actionPerformed(ActionEvent arg0) {

        //Obtengo la Opción seleccionada
        Command cmd = arg0.getCommand();

        if (cmd == null) {
            return;
        }

        System.out.println(String.valueOf(cmd.getId()));

        switch (cmd.getId()) {

            case Constants.CHANGE_PASSWORD_COMMAND:

                System.out.println("CHANGE_PASSWORD_COMMAND");

                //this.setGlassPane(null);

                if (changePasswordForm == null) {
                    changePasswordForm = new ChangePassword();
                    changePasswordForm.addCommand(backCommand);
                    changePasswordForm.addCommand(okChangePasswordForm);
                    changePasswordForm.addCommandListener(this);
                    changePasswordForm.setBackCommand(backCommand);
                }

                changePasswordForm.show();
                arg0.consume();
                break;

            case Constants.BACK_COMMAND:

                System.out.println("BACK_COMMAND");

                //20111004 MB: Cuando vuelvo, desincronizo para que al 
                //cambiar de tarjeta funcione
                //protocolManager.deSync();

                addAllCommands();

                this.show();

                this.editInfoForm = null;
                this.changePasswordForm = null;

                System.gc();

                break; 

            case Constants.OK_CHANGE_PASSWORD_COMMAND:

                System.out.println("OK_CHANGE_PASSWORD_COMMAND");

                this.editInfoForm = null;

                this.show();

                System.gc();

                break;                
        }
    }
}

import com.sun.lwuit.Form;
import com.sun.lwuit.*;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.layouts.BoxLayout;
import Project.language.LanguageManager;

public class ChangePassword extends Form implements ActionListener {

    private TextField oldPassword;
    private TextField newPassword;
    private TextField repeatNewPassword;

    public ChangePassword(){

        super ();

        this.setTitle(LanguageManager.getText("ChangePasswordTitle"));

        addCommandListener(this);

        this.setLayout(new BoxLayout(BoxLayout.Y_AXIS));

        this.addComponent(new Label(LanguageManager.getText("Actual")));

        oldPassword = new TextField("");
        oldPassword.setConstraint(TextArea.PASSWORD);

        this.addComponent(oldPassword);

        this.addComponent(new Label(LanguageManager.getText("New")));

        newPassword = new TextField("");
        newPassword.setConstraint(TextArea.PASSWORD);

        this.addComponent(newPassword);

        this.addComponent(new Label(LanguageManager.getText("Repeat")));

        repeatNewPassword = new TextField("");
        repeatNewPassword.setConstraint(TextArea.PASSWORD);

        this.addComponent(repeatNewPassword);
    }

    private String getOldPass(){
        return this.oldPassword.getText();
    }

    private String getNewPass(){
        return this.newPassword.getText();
    }

    public void actionPerformed(ActionEvent arg0) {

        Command cmd = arg0.getCommand();

        String oldPasswordVar = getOldPass();
        String newPasswordVar = getNewPass();

    }

}

明白了

在
InfoView.actionPerformed（…）
中，在
Constants.CHANGE\u PASSWORD\u命令下：
在
ChangePassword（）
构造函数中，
ChangePassword.addCommandListener（…）
由
changePasswordForm.addCommandListener（此）重写因此，当显示
ChangePassword
表单时，
InfoView.actionPerformed（…）
的按键事件处于活动状态

代码片段#1

...
case Constants.CHANGE_PASSWORD_COMMAND:
    changePasswordForm = new ChangePassword();
    changePasswordForm.addCommand(backCommand);
    changePasswordForm.addCommandListener(this); //<-- PROBLEM, because 'this' 
                                                 //          is referring to
                                                 //          'InfoView' and NOT
                                                 //          'ChangePassword'
    changePasswordForm.setBackCommand(backCommand);
...

。。。
case Constants.CHANGE_PASSWORD_命令：
changePasswordForm=新的ChangePassword（）；
changePasswordForm.addCommand（backCommand）；
changePasswordForm.addCommandListener（此）//