张生工作室

一切皆有可能
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看来大家也等急了,那我就暂发一点还有一点没完成(如何将Textbox里的文字写到文本文件中,希望会的朋友给我一点帮助,谢谢)

 

/*
 * TextBoxTest.java
 *
 * Created on 2007年9月9日, 下午12:28
 */

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

/**
 *
 * @author  Administrator
 * @version
 */
public class TextBoxTest extends MIDlet implements javax.microedition.lcdui.CommandListener,javax.microedition.lcdui.ItemStateListener {
    private Form form;
    private Display display;
    private TextBox textbox;
    private Command exitCmd;
    private Command backCmd;
    private Command menuCmd;
    private Command copyCmd;
    private Command cutCmd;
    private Command selectCmd;
    private Command pasteCmd;
    private Command saveCmd;
    private Command openCmd;
    private Command okCmd;
    private Command cancelCmd;
    TextField tf;
    Form tempform;
    boolean selectFlag=false;
//    boolean firstClick=true;
    String selectText="";
    int selectPosition,endPosition=0;
    
    public TextBoxTest()
    {   
        form =new Form("TextBox测度");
        display=Display.getDisplay(this);
        tempform=new Form("");
        textbox=new TextBox("TextBox","这是一个关于TextBox应用,实现在复制制,剪切功能",500,TextField.ANY);
        tf=new javax.microedition.lcdui.TextField("请输入文本文件名","",20,TextField.ANY);
        exitCmd=new Command("退出",Command.EXIT,1);
        backCmd=new Command("退出",Command.BACK,1);
        selectCmd=new Command("选定",Command.SCREEN,1); 
        copyCmd=new Command("复制",Command.SCREEN,1);
        cutCmd=new Command("剪切",Command.SCREEN,1);
        pasteCmd=new Command("粘贴",Command.SCREEN,1);
        saveCmd=new Command("保存",Command.SCREEN,1);
        openCmd=new Command("打开",Command.SCREEN,1);
        okCmd=new Command("确定",Command.OK,1); 
        cancelCmd=new Command("取消",Command.CANCEL,1);
        textbox.addCommand(selectCmd);
        textbox.addCommand(copyCmd);
        textbox.addCommand(cutCmd);
        textbox.addCommand(pasteCmd);
        textbox.addCommand(saveCmd);
        textbox.addCommand(openCmd);
        textbox.addCommand(exitCmd);
        textbox.addCommand(backCmd);
        textbox.setCommandListener(this);
    }
    
    public void startApp() {
        
        display.setCurrent(textbox);
        

        
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
    }

    public void commandAction(Command command, Displayable displayable) {
        if(command==selectCmd)
        {
            selectFlag=true;
            selectPosition=textbox.getCaretPosition();
        }
        else if((command==copyCmd)&&selectFlag)
        {
            int temp=textbox.size();
            char[] chr=new char[temp];
           textbox.getChars(chr);
           if (textbox.getCaretPosition()>selectPosition)
            selectText=String.valueOf(chr,selectPosition,textbox.getCaretPosition()-selectPosition);
           else
              selectText=String.valueOf(chr,selectPosition,selectPosition-textbox.getCaretPosition());
            selectFlag=false;
            
        }
        else if(command==cutCmd)
        {
            int temp=textbox.size();
            char[] chr=new char[temp];
            textbox.getChars(chr);
            selectText=String.valueOf(chr,selectPosition,textbox.getCaretPosition()-selectPosition);
            if (textbox.getCaretPosition()>selectPosition)
               textbox.delete(selectPosition,textbox.getCaretPosition()-selectPosition);
            else
               textbox.delete(selectPosition,selectPosition-textbox.getCaretPosition()); 
            selectFlag=false;
        }
            
        else if(command==exitCmd)
        {
            destroyApp(false);
            notifyDestroyed();
        }
        else if(selectText.length()>0&&command==pasteCmd)
        {
            /*the first way*/
          //  textbox.insert(selectText,textbox.getCaretPosition());
            
            /*the second way*/
            char[] chr=new char[selectText.length()];
            selectText.getChars(0,selectText.length(),chr,0);
            textbox.insert(chr,0,selectText.length(),textbox.getCaretPosition());
            
        }
        else if(command==saveCmd)
        {
           
            tempform.append(tf);
            display.setCurrent(tempform);
            tempform.addCommand(okCmd);
            tempform.addCommand(cancelCmd);
            tempform.setCommandListener(this);
        }
        else if(command==openCmd)
        {
            
            tempform.append(tf);
            display.setCurrent(tempform);
            tempform.addCommand(okCmd);
            tempform.addCommand(cancelCmd);
            tempform.setCommandListener(this);
        }
        else if(command==okCmd)
        {
            textbox.setString(myReadLine (tf.getString()));
            display.setCurrent(textbox);
        }
        else if(command==cancelCmd)
        {
            display.setCurrent(textbox);
        }
        if(command==backCmd)
        {
             destroyApp(false);
             notifyDestroyed();
             
        }
        
    }

    public void itemStateChanged(Item item) {
             
    }

           private String myReadLine (String testFileName) {
       InputStream  in = this.getClass().getResourceAsStream(testFileName);
          ByteArrayOutputStream  s;
    s = new ByteArrayOutputStream();      try{
        int ch=0;
        ch=in.read();  
        while ( ch!= -1 ) {
                      s.write( ch );
                ch=in.read();
            }
            in.close();  
        }  catch (IOException ioe){
           System.out.println(ioe.toString());
        }
        String str = s.toString();  
        try{
            s.close(); 
        }  catch (IOException ioe){
           System.out.println(ioe.toString());
        }
        return  str.trim(); 
    }
}



张生工作室
posted on 2007-09-09 21:33 张生工作室 阅读(366) 评论(0)  编辑  收藏

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