cameraform.java

j2me编制的摄像头程序,虽然比较简单

import javax.microedition.lcdui.*;
import javax.microedition.media.*;
import javax.microedition.media.control.*;
import java.io.IOException;
/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class cameraForm extends Form implements CommandListener,Runnable{

  Player p;
  VideoControl vc;

  int mintMode = VideoControl.USE_GUI_PRIMITIVE;

  Command cmdSnapshot = new Command("拍照",Command.OK,0);
  Command cmdBack = new Command("返回",Command.BACK,0);

  boolean mblnSnapshot = false;

  String mstrImageType = null;

  cameraMidlet midlet = null;

  public cameraForm(cameraMidlet m) {
    super("照相机");
	midlet = m;
    try{
      p = Manager.createPlayer("capture://video");
      p.realize();
      vc = (VideoControl) p.getControl("VideoControl");
      if (vc != null) {
        Item item = (Item)vc.initDisplayMode(mintMode, null);
		append(item);
      }
      p.start();
    }catch(Exception e){
      System.out.println("init Error:"+e.toString());
    }

    try {
      append("getContentType:" + p.getContentType());
      append("getDisplayWidth:" + vc.getDisplayWidth());
      append("getDisplayHeight:" + vc.getDisplayHeight());
      append("getDisplayX:" + vc.getDisplayX());
      append("getDisplayY:" + vc.getDisplayY());
      append("getSourceWidth:" + vc.getSourceWidth());
      append("getSourceHeight:" + vc.getSourceHeight());
    }
    catch (Exception e) {}

    addCommand(cmdSnapshot);
	addCommand(cmdBack);
    setCommandListener(this);
	(new Thread(this)).start();
  }



  public void commandAction(Command cmd,Displayable dis){
    try{
		if(cmd.equals(cmdSnapshot)){
			mblnSnapshot = true;	
		}else if(cmd.equals(cmdBack)){
			midlet.display.setCurrent(midlet.lstMenu);
			vc = null;
			p.close();
			p = null;
		}
    }catch(Exception e){
      this.append(e.toString());
    }
  }

  public void run(){
	while(true){
		try{
			Thread.sleep(100);
		}catch(Exception e){}
		if(mblnSnapshot){
			mblnSnapshot = false;
			try{
				byte[] RGB = vc.getSnapshot(null);
				if(get(0).getClass().getName().equals("javax.microedition.lcdui.ImageItem")){
					delete(0);
				}
				Image image = Image.createImage(RGB,0,RGB.length);
				ImageItem item = new ImageItem("图片大小："+RGB.length+"字节",image,ImageItem.LAYOUT_DEFAULT,"");
			    insert(0,item);
			}catch(Exception e){
				System.out.println(""+e.toString());
			}
		}
	}
  }
}