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 stubdisplay = 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 blocke.printStackTrace();} catch (MediaException e) {// TODO Auto-generated catch blocke.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 stubdisplay.setCurrent(cameraCanvas);}public void commandAction(Command command, Displayable displayable) {// TODO Auto-generated method stubif (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 blocke.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Playerpublic 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 blocke.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 blocke.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");