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Revision as of 11:26, 30 July 2013 by hamishwillee (Talk | contribs)

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How to record video in Java ME

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Created: dcrocha (20 Oct 2007)
Last edited: hamishwillee (30 Jul 2013)

Here is a sample code showing how to record video and save recorded files to the file system using Java ME:

dcrocha 01:01, 20 October 2007 (UTC)

package example;
 
import java.io.OutputStream;
 
import javax.microedition.io.Connector;
import javax.microedition.io.file.FileConnection;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
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.Graphics;
import javax.microedition.media.Manager;
import javax.microedition.media.Player;
import javax.microedition.media.PlayerListener;
import javax.microedition.media.control.RecordControl;
import javax.microedition.media.control.VideoControl;
 
public class VideoCanvas extends Canvas implements PlayerListener, CommandListener {
 
private VideoRecordMIDlet midlet = null;
private Command start = new Command("Start",Command.OK,0);
private Command stop = new Command("Stop",Command.OK,1);
private Command exit = new Command("Exit",Command.BACK,0);
private Command play = new Command("Play",Command.OK,2);
private String status = "Not initialized";
private Player player = null;
private VideoControl control = null;
private RecordControl record = null;
private boolean recording = false;
private FileConnection conn = null;
private OutputStream stream = null;
private String PATH = System.getProperty("fileconn.dir.videos") + "vi.3gp";
 
/**
* Constructor
*
* @param midlet
*/

 
public VideoCanvas(VideoRecordMIDlet midlet) {
System.out.println(PATH);
this.midlet = midlet;
addCommand(play);
addCommand(start);
addCommand(stop);
addCommand(exit);
setCommandListener(this);
}
 
public void commandAction(Command c, Displayable arg1) {
if(c == start) {
recording = true;
startRecording();
}
else if(c == stop) {
stop();
recording = false;
}
else if(c == play) {
recording = false;
repaint();
startPlaying();
}
else if(c == exit) {
midlet.notifyDestroyed();
}
}
 
/**
* Paint
*/

 
protected void paint(Graphics g) {
g.setColor(0,0,0);
g.fillRect(0,0,getWidth(),getHeight());
}
 
public void startRecording() {
try {
player = Manager.createPlayer("capture://video");
player.addPlayerListener(this);
player.realize();
 
//setup recording
record = (RecordControl)player.getControl("RecordControl");
record.setRecordSizeLimit(300000);
conn = (FileConnection)Connector.open(PATH,Connector.READ_WRITE);
if(!conn.exists()) conn.create();
stream = conn.openOutputStream();
record.setRecordStream(stream);
 
// Grab the video control and set it to the current display.
control = (VideoControl)player.getControl("VideoControl");
if (control != null) {
control.initDisplayMode(VideoControl.USE_DIRECT_VIDEO,this);
control.setDisplaySize(getWidth(),getHeight());
control.setVisible(true);
}
 
player.start();
record.startRecord();
}
catch(Exception e) {
Alert erro = new Alert("Erro",e.toString(),null,AlertType.ERROR);
Display.getDisplay(midlet).setCurrent(erro);
e.printStackTrace();
}
}
 
/**
* Start
*
*/

 
public void startPlaying() {
try {
player = Manager.createPlayer(PATH);
player.addPlayerListener(this);
player.realize();
 
// Grab the video control and set it to the current display.
control = (VideoControl)player.getControl("VideoControl");
if (control != null) {
control.initDisplayMode(VideoControl.USE_DIRECT_VIDEO,this);
control.setDisplaySize(176,144);
control.setDisplayLocation((getWidth() - control.getDisplayWidth()) / 2,(getHeight() - control.getDisplayHeight()) / 2);
control.setVisible(true);
}
 
player.start();
}
catch(Exception e) {
Alert erro = new Alert("Erro",e.getMessage(),null,AlertType.ERROR);
Display.getDisplay(midlet).setCurrent(erro);
e.printStackTrace();
}
}
 
public void stop() {
if(player != null) {
try {
if(recording) {
record.stopRecord();
record.commit();
stream.close();
}
player.stop();
player.deallocate();
player.close();
player = null;
if(recording) {
Alert alert = new Alert("Mensagem","Gravado em " + PATH,null,AlertType.INFO);
Display.getDisplay(midlet).setCurrent(alert,this);
stream = null;
}
 
if(conn != null)
conn.close();
}
catch(Exception e) {
 
}
}
}
 
public void playerUpdate(Player p, String s, Object o) {
 
if(p.getState() == Player.STARTED) {
status = control.getDisplayHeight() + "=" + control.getDisplayWidth();
setTitle(status);
}
 
}
 
}

dcrocha 01:01, 20 October 2007 (UTC)

This page was last modified on 30 July 2013, at 11:26.
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