正在做一个j2me的项目，需要用相机拍照然后上传服务器

[java_father]

有朋友做过这样的项目吗？

我基于SUN的WTK 在模拟器上实现了拍照功能

但是真机测试时候 打开--拍照 却灰屏。

打不开手机的摄像。

[zyc1314199]

看看代码。。。。。

[napier]

你找找真机厂商提供的Java API看看吧，会不会是手机不支持通用API

[QQ153984069]

没有碰到过。应该是代码问题。

[QQ153984069]

package prj13_1;

import java.io.IOException;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Image;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.media.control.VideoControl;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import prj13_1.canvas.VideoCanvas;

public class VideoControlExample extends MIDlet implements CommandListener{
    private Display display;
    private Form form;
    private Command exit, back, capture, camera;
    private Player player;
    private VideoControl videoControl;
    private Video video;
    
	public VideoControlExample() {
        display = Display.getDisplay(this);
        form = new Form("Capture Video");
        exit = new Command("Exit", Command.EXIT, 0);
        camera = new Command("Camera", Command.SCREEN, 1);
        back = new Command("Back", Command.BACK, 2);
        capture = new Command("Capture", Command.SCREEN, 3);        
        form.addCommand(camera);
        form.setCommandListener(this);
	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
        notifyDestroyed();

	}

	protected void pauseApp() {
		// TODO Auto-generated method stub

	}

	protected void startApp() throws MIDletStateChangeException {    
        display.setCurrent(form);

	}

    public void commandAction(Command c, Displayable s){
        String label = c.getLabel();
        if (label.equals("Exit")){
        	try {
				this.destroyApp(true);
			} catch (MIDletStateChangeException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
        } else if (label.equals("Camera")) {
            showCamera();
        } else if (label.equals("Back"))
            display.setCurrent(form);
        else if (label.equals("Capture")) {
            video = new Video(this);
            video.start();
        }
    }
    
    public void showCamera(){
        try{
            player = Manager.createPlayer("capture://video");
            player.realize();            
            videoControl = (VideoControl)player.getControl("VideoControl");
            Canvas canvas = new VideoCanvas(this, videoControl);
            canvas.addCommand(back);
            canvas.addCommand(capture);
            canvas.setCommandListener(this);
            display.setCurrent(canvas);
            player.start();
        } catch (IOException ioe) {} catch (MediaException me) {}
    }

    class Video extends Thread {
        VideoControlExample midlet;
        public Video(VideoControlExample midlet) {
            this.midlet = midlet;
        }
        
        public void run() {
            captureVideo();            
        }
        
        public void captureVideo() {
            try {
                byte[] photo = videoControl.getSnapshot(null);
                Image image = Image.createImage(photo, 0, photo.length);
                form.append(image);
                display.setCurrent(form);                
                player.close();
                player = null;
                videoControl = null;
            } catch (MediaException me) { }
        }
    };
}

[huang_63188]

我学生。。。

[suhu407563045]

要你的手机 支持 视频捕获
不是有摄像头就可以
supports.video.capture 是否支持视频捕获，如true