J2ME 手机拍照程序

package com.zeph.j2me; import java.io.IOException; 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; public class CameraControlMIDlet extends MIDlet implements CommandListener { private Display display; private CameraCanvas cameraCanvas; private Form picForm; private Command captureCommand; private Command exitCommand; private Command backCommand; private Player player; private VideoControl videoControl; public CameraControlMIDlet() { // TODO Auto-generated constructor stub display = Display.getDisplay(this); try { player = Manager.createPlayer("capture://video"); player.realize(); videoControl = (VideoControl) player.getControl("VideoControl"); cameraCanvas = new CameraCanvas(player, videoControl); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (MediaException e) { // TODO Auto-generated catch block e.printStackTrace(); } picForm = new Form("图像显示窗口"); captureCommand = new Command("拍照", Command.OK, 0); exitCommand = new Command("退出", Command.EXIT, 0); backCommand = new Command("返回摄像头", Command.OK, 0); cameraCanvas.addCommand(captureCommand); cameraCanvas.addCommand(exitCommand); picForm.addCommand(backCommand); picForm.setCommandListener(this); cameraCanvas.setCommandListener(this); } protected void destroyApp(boolean arg0) throws MIDletStateChangeException { // TODO Auto-generated method stub } protected void pauseApp() { // TODO Auto-generated method stub } protected void startApp() throws MIDletStateChangeException { // TODO Auto-generated method stub display.setCurrent(cameraCanvas); } public void commandAction(Command command, Displayable displayable) { // TODO Auto-generated method stub if (command == captureCommand) { new Snapshot().start();//拍照时需要使用线程启动 } else if (command == exitCommand) { try { destroyApp(true); } catch (MIDletStateChangeException e) { // TODO Auto-generated catch block e.printStackTrace(); } notifyDestroyed(); } else if (command == backCommand) { display.setCurrent(cameraCanvas); } } class Snapshot extends Thread {//使用内部类可以很方便的使用VideoControl和Player public Image getSnapshot() { Image image = null; if (player != null) { byte[] imageData; try { imageData = videoControl.getSnapshot(null); image = Image.createImage(imageData, 0, imageData.length); } catch (MediaException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return image; } public void run() { Image image = getSnapshot(); picForm.append(image); display.setCurrent(picForm); } } }

package com.zeph.j2me; import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Graphics; import javax.microedition.media.MediaException; import javax.microedition.media.Player; import javax.microedition.media.control.VideoControl; public class CameraCanvas extends Canvas { public CameraCanvas(Player player, VideoControl videoControl) { try { videoControl.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, this); videoControl.setDisplayLocation(0, 0); videoControl.setDisplaySize(getWidth(), getHeight()); player.start(); videoControl.setVisible(true); } catch (MediaException e) { // TODO Auto-generated catch block e.printStackTrace(); } } protected void paint(Graphics g) { // TODO Auto-generated method stub } }

在测试S403rd的系统时，需要把

player = Manager.createPlayer("capture://video");

更改为

player = Manager.createPlayer("capture://image");