readerbox.java

J2ME程序设计实例教程的源码

import javax.microedition.lcdui.*;

public class ReaderBox extends TextBox implements CommandListener {
    private FileManagerMIDlet midlet;
    private Command cmdBack = new Command("返回", Command.BACK, 1);
    private Displayable backScreen;
    
    public ReaderBox(FileManagerMIDlet midlet) {
        super("阅读器", "", 2000, TextField.ANY|TextField.UNEDITABLE);
        this.midlet = midlet;
        
        addCommand(cmdBack);
        setCommandListener(this);
    }
    
    public void setContent(String fileName, String content) {
        setTitle("阅读器-" + fileName);
        setMaxSize(content.length());
        setString(content);
    }
    
    public void setBackScreen(Displayable backScreen) {
        this.backScreen = backScreen;
    }
    
    public void commandAction(Command cmd, Displayable d) {
        if(cmd == cmdBack) {
            midlet.backTo(backScreen);
        }
    }
}