textboxndemo.java~5~

J2ME高级用户界面的学习代码

//TextBoxNDemo.java

package ORA.ch4;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.lcdui.Ticker;
import javax.microedition.midlet.MIDlet;

public class TextBoxNDemo extends MIDlet
{
  private static final int MAX_TEXT_SIZE = 640;
  private TextBox textBox;
  protected Display display;
  protected boolean started;

  protected void startApp()
  {
    String str = null;
    if(!started)
    {
      try{
        InputStream is = getClass().getResourceAsStream("/text.txt");
        InputStreamReader r = new InputStreamReader(is);
        char[] buffer = new char[3200];
        StringBuffer sb = new StringBuffer();
        int count;
        while((count = r.read(buffer,0,buffer.length)) > -1)
        {
          sb.append(buffer,0,count);
        }
        str = sb.toString();
      }catch(IOException ex){
        str = "Failed to text!";
      }
    }
    textBox = new TextBox("TextBox New Demo",str,MAX_TEXT_SIZE,TextField.ANY);

    Ticker ticker = new Ticker("This is a ticker...");
    textBox.setTicker(ticker);

    display = Display.getDisplay(this);
    display.setCurrent(textBox);

    started = true;
  }

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

}//    TextBoxNDemo