mycanvas.java

j2me程序开发模板

import javax.microedition.lcdui.*;
/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2006</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class MyCanvas extends Canvas implements Runnable{
  boolean runFlag;
  Display display;

  int status = -1;
  final int ST_LOAD = 0;
  public MyCanvas(Display display) {
    this.display = display;
    try {
      status = ST_LOAD;
      runFlag = true;
      new Thread(this).start();
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }
  protected void paint(Graphics parm1) {
    /**@todo Implement this javax.microedition.lcdui.Canvas abstract method*/
    switch(status){
      case ST_LOAD:
        break;
    }
  }
  public void keyPressed(int keycode)
  {
    if (keycode == -6)
    {
      handleSoft1();
    }
    else if (keycode == -7)
    {
      handleSoft2();
    }
    else if (keycode == -5) // function should be same as soft1
    {
      handleSelect();
    }
    else if (keycode == -1 || keycode == 50)
    {
      handleUp();
    }
    else if (keycode == -2 || keycode == 56)
    {
      handleDown();
    }
    else if (keycode == -3 || keycode == 52)
    {
      handleLeft();
    }
    else if (keycode == -4 || keycode == 54)
    {
      handleRight();
    }
  }
  public void keyReleased(int keycode) {

  }
  public void handleSoft1() // left sofykey
  {
  }

  public void handleSoft2() // right softkey
  {
  }

  public void handleSelect() // function same as soft1
  {
  }

  public void handleLeft()
  {

  }

  public void handleRight()
  {

  }

  public void handleUp()
  {
  }
  public void handleDown()
  {

  }

  public void run(){
    try {
      while(runFlag){
        if(status == ST_LOAD){
          Thread.sleep(100);
        }
        repaint();
      }
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }
}