splashscreen.java

Enterprise J2ME书籍的配套源码。

/*
 *
 * The contents of this file are subject to the GNU Public License
 * Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License.
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific terms governing rights and limitations
 * under the License.
 *
 * Developed by Michael Juntao Yuan 2002.
 *
 * */
package com.enterprisej2me.iFeedBack.midp;
 
import java.io.*;
import javax.microedition.lcdui.*;

public class SplashScreen extends Canvas {

  public SplashScreen () {
  }

  public void paint (Graphics g) {
    Image splash;
    int w = getWidth ();
    int h = getHeight ();

    try {
      Class c = this.getClass();
      InputStream is = c.getResourceAsStream("/splash.png");
      ByteArrayOutputStream bos = new ByteArrayOutputStream ();
      byte [] buf = new byte [256];
      while (true) {
        int rd = is.read (buf, 0, 256);
        if (rd == -1) break;
        bos.write (buf, 0, rd);
      }
      buf = bos.toByteArray ();
      splash = Image.createImage(buf, 0, buf.length);
      bos.close();
      is.close();

      g.drawImage(splash, w/2, h/2, 
                  Graphics.VCENTER | Graphics.HCENTER);

    } catch (Exception e) {
      g.drawString("iFeedBack", w/2, h/2,
                   Graphics.BASELINE | Graphics.HCENTER);
    }
  }

}