ui_low7.java

来自「J2ME 无线通信技术应用开发源代码」· Java 代码 · 共 44 行

// 程序名UI_Low7.java
// 测试图象的绘制——Image对象
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class UI_Low7 extends MIDlet implements CommandListener{
  private Display  display;
  private MutableImage imageItem;
  private Form form;
  private Command cmdExit;
  private Command cmdChange;
  
  public UI_Low7(){
    display = Display.getDisplay( this );
    imageItem = new MutableImage();
    form = new Form("Test mutable image");
    form.append(imageItem);
    cmdExit = new Command("Exit",Command.SCREEN,1);
    cmdChange = new Command("Change",Command.SCREEN,1);
    form.addCommand(cmdExit);
    form.addCommand(cmdChange);
    form.setCommandListener(this);
  }

  protected void startApp(){
    display.setCurrent(form);
  }
   
  public void commandAction( Command c, Displayable d ){
    if (c == cmdChange) {
      imageItem.change();
      return;
    }
    if (c == cmdExit){
      destroyApp( true );
      notifyDestroyed();
    }
  }

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