使用J2ME实现拍照和录音功能

CommandResources类，用于存放一些常量
package
com.xiaoyu.record.common;

public
class
CommandResources {

public
static
final String
IMG_TYPE
= "jpeg";

public
static
final
int
IMG_WIDTH = 128;

public
static
final
int
IMG_HEIGHT = 128;

private
static
int
TXT_ID = 0;

public
static
final String
TXT_T_APP
= "Record sound & video";

public
static
final String
TXT_T_CAM
= "拍照";

public
static
final String
TXT_T_REC
= "录音";

//主界面List

public
static
final String
TXT_I_CAMERA =
"我要拍照";

public
static
final String
TXT_I_RECORD =
"我要录音";

public
static
final String
TXT_I_ABOUT
= "关于";

public
static
final String
TXT_I_EXIT
= "退出";

public
static
final String
TXT_C_OK
= "确定";

public
static
final String
TXT_C_CAM
= "拍照";

public
static
final String
TXT_C_REC
= "录音";

public
static
final String
TXT_C_EXIT
= "退出";

public
static
final String
TXT_C_PAUSE
= "暂停";

public
static
final String
TXT_C_RESUME =
"继续";

public
static
final String
TXT_C_BACK
= "返回";

public
static
final String
TXT_C_REC_FIN =
"完成";

public
static
final
byte
EVENT_EXIT = 0;

public
static
final
byte
EVENT_BACK
= 1;

public
static
final
byte
EVENT_CAM
= 2;//拍照

public
static
final
byte
EVENT_REC
= 3;//录音

public
static
final
byte
EVENT_REC_PAUSE = 4;//暂停录音

public
static
final
byte
EVENT_REC_RESUME
= 5;//继续录音

public
static
final
byte
EVENT_REC_FIN
= 6;//完成录音

public
static
final
byte
EVENT_GO_CAM
= 7;//进入拍照界面

public
static
final
byte
EVENT_GO_REC
= 8;//进入录音界面

}

以下是控制器类：
package com.xiaoyu.record.controller;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.Item;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.media.control.RecordControl;
import javax.microedition.media.control.VideoControl;

import com.xiaoyu.record.common.CommandResources;
import com.xiaoyu.record.midlet.RecordMIDLet;
import com.xiaoyu.record.view.CameraForm;
import com.xiaoyu.record.view.MainMenuList;
import com.xiaoyu.record.view.RecordForm;

public class GUIController {

private RecordMIDLet midlet;

private MainMenuList mainMenuList;

private CameraForm cameraForm;

private RecordForm recordForm;

private Player videoPlayer;

private Player recordPlayer;

private VideoControl videoControl;

private RecordControl recordControl;

private ByteArrayOutputStream baos = null;

public GUIController(RecordMIDLet recordMIDLet) {

this.midlet = recordMIDLet;

}

public void init() {

mainMenuList = new MainMenuList(CommandResources.TXT_T_APP, this);

cameraForm = new CameraForm(CommandResources.TXT_T_CAM, this);

recordForm = new RecordForm(CommandResources.TXT_T_REC, this);

setCurrent(mainMenuList);

}

public void handleEvent(int eventId) {

try {

switch (eventId) {

case CommandResources.EVENT_GO_CAM:

setCurrent(cameraForm);

break;

case CommandResources.EVENT_CAM:

this.photo("/test.jpeg");

break;

case CommandResources.EVENT_GO_REC:

setCurrent(recordForm);

break;

case CommandResources.EVENT_REC:

this.record("D://audio.mid");

break;

case CommandResources.EVENT_REC_PAUSE:

this.recordPause();

break;

case CommandResources.EVENT_REC_RESUME:

this.recordResume();

break;

case CommandResources.EVENT_REC_FIN:

this.recordCommit();

break;

case CommandResources.EVENT_BACK:

setCurrent(mainMenuList);

break;

case CommandResources.EVENT_EXIT:

midlet.exit(true);

break;

default:

break;

}

} catch (IOException e) {

e.printStackTrace();

} catch (MediaException e) {

e.printStackTrace();

}

}

public void setCurrent(Displayable dis) {

midlet.setCurrent(dis);

}

public void record(String path) throws IOException, MediaException {

if (recordPlayer == null) {

recordPlayer = Manager.createPlayer("capture://audio");

recordPlayer.realize();

}

recordControl = (RecordControl) recordPlayer

.getControl("RecordControl");

recordControl.reset();

if (recordControl != null) {

baos = new ByteArrayOutputStream();

recordControl.setRecordStream(baos);
//
recordControl.setRecordLocation(path);

recordControl.startRecord();

recordPlayer.start();

}

}

public void recordPause() {

if (recordControl != null) {

System.out.println("PAUSE--SIZE = " + baos.size());

recordControl.stopRecord();

}

}

public void recordResume() {

if (recordControl != null) {

System.out.println("RESUME--SIZE = " + baos.size());

recordControl.startRecord();

}

}

public void recordCommit() throws IOException {

if (recordControl != null) {

recordControl.commit();

System.out.println("COMMIT--SIZE = " + baos.size());

}

}

public void photo(String path) throws IOException, MediaException {

if (videoPlayer == null) {

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

videoPlayer.realize();

videoControl = (VideoControl) videoPlayer

.getControl("VideoControl");

if (videoControl != null) {

System.out.println("/** 已经得到了VideoControl!");

Item itemVideoWindow;

itemVideoWindow = (Item) videoControl.initDisplayMode(0, null);

// 在USE_GUI_PRIMITIVE模式下，默认是可见的，而在USE_DIRECT_VIDEO模式下，

// 默认是不可见的，需要通过方法setVisible(boolean visible)来设置

itemVideoWindow.setLayout(3);

cameraForm.append(itemVideoWindow);

videoPlayer.start();

}

videoControl.setVisible(true);

}

byte imageData[];

imageData = videoControl.getSnapshot("encoding="

+ CommandResources.IMG_TYPE);
//
+ "&width="
//
+ CommandResources.IMG_WIDTH + "&height="
//
+ CommandResources.IMG_HEIGHT);

if (imageData != null) {

System.out.println(imageData.length);

Image img = Image.createImage(imageData, 0, imageData.length);

}

}

public MainMenuList getMainMenuList() {

return mainMenuList;

}

public void setMainMenuList(MainMenuList mainMenuList) {

this.mainMenuList = mainMenuList;

}

public CameraForm getCameraForm() {

return cameraForm;

}

public void setCameraForm(CameraForm cameraForm) {

this.cameraForm = cameraForm;

}

public RecordForm getRecordForm() {

return recordForm;

}

public void setRecordForm(RecordForm recordForm) {

this.recordForm = recordForm;

}

}

以下是三个界面类：
package com.xiaoyu.record.view;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;

import com.xiaoyu.record.controller.GUIController;
import com.xiaoyu.record.common.CommandResources;

public class CameraForm extends Form {

private GUIController controller;

private Command cmdCam;

private Command cmdBack;

private Command cmdExit;

public CameraForm(String title, GUIController controller) {

super(title);

this.controller = controller;

cmdCam = new Command(CommandResources.TXT_C_CAM, Command.SCREEN, 1);

cmdBack = new Command(CommandResources.TXT_C_BACK, Command.BACK, 3);

cmdExit = new Command(CommandResources.TXT_C_EXIT, Command.EXIT, 4);

addCommand(cmdCam);

addCommand(cmdBack);

addCommand(cmdExit);

this.setCommandListener(new CameraFormListener());

}

private class CameraFormListener implements CommandListener {

public void commandAction(Command command, Displayable dis) {

if(command == cmdCam) {

controller.handleEvent(CommandResources.EVENT_CAM);

} else if(command == cmdBack) {

controller.handleEvent(CommandResources.EVENT_BACK);

} else if(command == cmdExit) {

controller.handleEvent(CommandResources.EVENT_EXIT);

}

}

}
}

package com.xiaoyu.record.view;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.List;

import com.xiaoyu.record.controller.GUIController;
import com.xiaoyu.record.common.CommandResources;;

public class MainMenuList extends List {

private GUIController controller;

private Command commandOk;

public MainMenuList(String title, GUIController controller) {

super(title, List.IMPLICIT);

this.controller = controller;

commandOk = new Command(CommandResources.TXT_C_OK,

Command.OK, 5);

this.addCommand(commandOk);

this.setCommandListener(new MainMenuListener());

this.append(CommandResources.TXT_I_CAMERA, null);

this.append(CommandResources.TXT_I_RECORD, null);

this.append(CommandResources.TXT_I_ABOUT, null);

this.append(CommandResources.TXT_I_EXIT, null);

}

private class MainMenuListener implements CommandListener {

public void commandAction(Command command, Displayable dis) {

if(command == commandOk || (command == List.SELECT_COMMAND)){

int index = ((List)dis).getSelectedIndex();

switch(index) {

case 0 :

controller.handleEvent(CommandResources.EVENT_GO_CAM);

break;

case 1 :

controller.handleEvent(CommandResources.EVENT_GO_REC);

break;

case 2 :

break;

case 3 :

controller.handleEvent(CommandResources.EVENT_EXIT);

break;

}

}

}

}

}

package com.xiaoyu.record.view;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;

import com.xiaoyu.record.common.CommandResources;
import com.xiaoyu.record.controller.GUIController;

public class RecordForm extends Form {

private GUIController controller;

private Command cmdRec;

private Command cmdPause;

private Command cmdBack;

private Command cmdExit;

private Command cmdFin;

private Command cmdResume;

public RecordForm(String title, GUIController controller) {

super(title);

this.controller = controller;

cmdRec = new Command(CommandResources.TXT_C_REC, Command.SCREEN, 1);

cmdPause = new Command(CommandResources.TXT_C_PAUSE, Command.SCREEN, 2);

cmdResume = new Command(CommandResources.TXT_C_RESUME, Command.SCREEN, 3);

cmdBack = new Command(CommandResources.TXT_C_BACK, Command.BACK, 4);

cmdExit = new Command(CommandResources.TXT_C_EXIT, Command.EXIT, 5);

cmdFin = new Command(CommandResources.TXT_C_REC_FIN, Command.SCREEN, 6);

addCommand(cmdRec);

addCommand(cmdPause);

addCommand(cmdBack);

addCommand(cmdExit);

addCommand(cmdFin);

addCommand(cmdResume);

this.setCommandListener(new RecordFormListener());

}

private class RecordFormListener implements CommandListener {

public void commandAction(Command command, Displayable dis) {

if(command == cmdRec) {

controller.handleEvent(CommandResources.EVENT_REC);

} else if(command == cmdPause) {

controller.handleEvent(CommandResources.EVENT_REC_PAUSE);

} else if(command == cmdBack) {

controller.handleEvent(CommandResources.EVENT_BACK);

} else if(command == cmdExit) {

controller.handleEvent(CommandResources.EVENT_EXIT);

} else if(command == cmdFin) {

controller.handleEvent(CommandResources.EVENT_REC_FIN);

} else if(command == cmdResume) {

controller.handleEvent(CommandResources.EVENT_REC_RESUME);

}

}

}
}

最后是主MIDLet类：
package com.xiaoyu.record.midlet;

import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

import com.xiaoyu.record.controller.GUIController;
import com.xiaoyu.record.common.CommandResources;;;

public class RecordMIDLet extends MIDlet {

private Display display;

private static GUIController controller;

public RecordMIDLet() {

super();

display = Display.getDisplay(this);

}

protected void destroyApp(boolean arg0) throws MIDletStateChangeException {

controller = null;

}

protected void pauseApp() {

if(display.getCurrent() == controller.getRecordForm()) {

controller.handleEvent(CommandResources.EVENT_REC_PAUSE);

}

this.notifyPaused();

}

protected void startApp() throws MIDletStateChangeException {

GUIController controller = new GUIController(this);

try {

controller.init();

} catch (Exception e) {

e.printStackTrace();

}

}

public void setCurrent(Displayable dis) {

display.setCurrent(dis);

}

public Displayable getCurrent() {

return display.getCurrent();

}

public Display getCurrentDisplay() {

return display;

}

public void exit(boolean flag) {

try {

this.destroyApp(flag);

this.notifyDestroyed();

} catch (MIDletStateChangeException e) {

e.printStackTrace();

}

}
}