Recording midlet with save function
Im making a midlet that records audio and saves it to phone's file system. I get the application to run in emulator but when in phone (Sony Ericsson V800) i immediately get error Cannot create a DataSource for: null. Here is the code i'm trying to get to work: (i tried to change the file:///test.wav to file:///e:/test.wav but it didn't help. Also i got a version of this code without the save function but it doesn't work in phone either, it just says error.
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.media.*;
import javax.microedition.media.control.RecordControl;
publicclass SaveCapturedAudioMIDletextends MIDlet
implements CommandListener{
// the display items
private Display display =null;
private Alert alert =null;
private Command exitCommand =null;
// players and controls
private Player capturePlayer =null;
private Player playbackPlayer =null;
private RecordControl rControl =null;
privateboolean error =false;
public SaveCapturedAudioMIDlet(){
// create the display
display = Display.getDisplay(this);
alert =new Alert("Message");
alert.setTimeout(Alert.FOREVER);
alert.setString("Capturing for 10 seconds. Say something intelligent!");
exitCommand =new Command("Exit", Command.EXIT, 1);
alert.addCommand(exitCommand);
alert.setCommandListener(this);
try{
// create the capture player
capturePlayer = Manager.createPlayer("capture://audio");
if (capturePlayer !=null){
// if created, realize it
capturePlayer.realize();
// and grab the RecordControl
rControl = (RecordControl)capturePlayer.getControl(
"javax.microedition.media.control.RecordControl");
// set the alert as the current item
display.setCurrent(alert);
// if it is null throw exception
if(rControl ==null)thrownew Exception("No RecordControl available");
// and set the destination for this captured data
rControl.setRecordLocation("file:///test.wav");
}else{
thrownew Exception("Capture Audio Player is not available");
}
}catch(Exception e){
error(e);
}
}
publicvoid startApp(){
if(error)return;
try{
// first start the corresponding recording player
capturePlayer.start();
// and then start the RecordControl
rControl.startRecord();
// now record for 10 seconds
Thread.sleep(10000);
// stop recording after time is up
rControl.stopRecord();
// commit the recording
rControl.commit();
// stop the Player instance
capturePlayer.stop();
// and close it to release the microphone
capturePlayer.close();
// finally, create a Player instance to playback
// check your device documentation to find out the root.
// The following will work on devices that have the root
// specified as shown
playbackPlayer = Manager.createPlayer("file:///test.wav");
// and start it
playbackPlayer.start();
}catch(Exception e){
error(e);
}
}
publicvoid pauseApp(){
}
publicvoid destroyApp(boolean unconditional){
if(capturePlayer !=null) capturePlayer.close();
if(playbackPlayer !=null) playbackPlayer.close();
}
publicvoid commandAction(Command cmd, Displayable disp){
if(cmd == exitCommand){
destroyApp(true);
notifyDestroyed();
}
}
// general purpose error method, displays on screen as well to output
privatevoid error(Exception e){
alert.setString(e.getMessage());
alert.setTitle("Error");
display.setCurrent(alert);
e.printStackTrace();
error =true;
}
}
