Java Development

[brent_glad]

package com.rim.samples.device.helloworlddemo;

import net.rim.device.api.ui.UiApplication;

import net.rim.device.api.ui.container.MainScreen;

import net.rim.device.api.ui.Field;

import net.rim.device.api.ui.component.Dialog;

import net.rim.device.api.ui.component.LabelField;

import javax.microedition.io.*;

import java.io.InputStream;

import javax.microedition.media.*;

import javax.microedition.media.Manager;

import javax.microedition.media.MediaException;

import javax.microedition.media.Player;

class HelloWorldDemo extends UiApplication {

    public static void main(String[] args) {

        HelloWorldDemo theApp = new HelloWorldDemo();

        theApp.enterEventDispatcher();

    }

    private HelloWorldDemo() {

        pushScreen(new HelloWorldScreen());

    }    

}

final class HelloWorldScreen extends MainScreen {

    HelloWorldScreen() {

        LabelField title = new LabelField("Hello World Demo" , LabelField.ELLIPSIS | LabelField.FIELD_HCENTER);

        setTitle(title);

        try {

            String murl = "http://homepage.mac.com/brentris/my_song.mp3;deviceside=true";

            HttpConnection conn = (HttpConnection) Connector.open(murl, Connector.READ_WRITE, false);

            InputStream is = conn.openInputStream();

            Player _player = Manager.createPlayer(is, "audio/mpeg");

            _player.start();

        } catch(Exception e) {

            System.out.println("Default error connecting to stream...unrecoverable");

            System.out.println(e.getMessage());

            e.printStackTrace();

            System.out.println("error=8 " + e.getClass());

        }

    }

    public void close() {

        System.exit(0);

        super.close();

    }   

}

----------------------------------------------------------------------

Above is my entire code. It's a CLDC app built with JDE 4.6.0.12. I am using the 4.6.0.266 BlackBerry Bold 9000 Simulator and a 4.6.0 Bold 9000 actual device on AT&T.

In this sample I am using a Garageband MP3 I created (but my final goal is to stream a 64kbit mp3 stream, I"m hiding that for privacy reasons).

This one plays, but only like 50% of the time, maybe. Sometimes it launches and plays the whole song (1 minute, 32 seconds). Sometimes it starts playing but dies after about 5 seconds. Sometimes it refuses to play at all and won't even launch the application.

What in the world is going on here? I posted my entire code above. Somebody please help me.

Thanks!

[brent_glad]

bump. any ideas why it doesn't work reliably?

[rcmaniac25]

Oops, I had skimed this earlier and didn't realize that it was streaming. Try passing the URL directly into the createPlayer function.

[brent_glad]

sorry could you write out the code for me?

[rcmaniac25]

I have not tried this myself, I just modified your code.

package com.rim.samples.device.helloworlddemo;

import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.LabelField;

import javax.microedition.io.*;
import java.io.InputStream;
import javax.microedition.media.*;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;

class HelloWorldDemo extends UiApplication {
    public static void main(String[] args) {
        HelloWorldDemo theApp = new HelloWorldDemo();
        theApp.enterEventDispatcher();
    }

    private HelloWorldDemo() {
        pushScreen(new HelloWorldScreen());
    }
}

final class HelloWorldScreen extends MainScreen {
    HelloWorldScreen() {
        LabelField title = new LabelField("Hello World Demo" , LabelField.ELLIPSIS | LabelField.FIELD_HCENTER);
        setTitle(title);
        try {
            String murl = "http://homepage.mac.com/brentris/my_song.mp3";
            boolean found = false;
            String[] supTypes = Manager.getSupportedContentTypes("http");
            for(int i = 0; i < supTypes.length; i++)
            {
                if(subTypes[i].equals("audio/mpeg"))
                {
                    found = true;
                    break;
                }
            }
            if(!found)
            {
                System.out.println("MP3 not supported.");
                return;
            }
            Player _player = Manager.createPlayer(murl);
            _player.start();
        } catch(Exception e) {
            System.out.println("Default error connecting to stream...unrecoverable");
            System.out.println(e.getMessage());
            e.printStackTrace();
            System.out.println("error=8 " + e.getClass());
        }
    }

    public void close() {
        System.exit(0);
        super.close();
    }
}

[brent_glad]

Hmm, it doesn't seem to be playing the audio. Do I need to open an httpconnection and inputstream?

[rcmaniac25]

I forgot about size. I just tried it myself and got HTTP error 413 (Entity too large). Let me try one more thing and then I will post my results.

EDIT: I modified the code back to your original ocde but then edited it again so it buffered the file before creating the player:

HttpConnection conn = (HttpConnection) Connector.open(murl, Connector.READ, false);
	            InputStream is = conn.openInputStream();
	            
	            int len = (int)conn.getLength();
	            byte[] buf = new byte[len];
	            int bytesRead = 0;
				int readIn = 0;
				int bufferSize = 1024;
				while ((bytesRead != len) && (readIn != -1))
				{
					readIn = is.read(buf, bytesRead, bufferSize);
					bytesRead += readIn;
				}
				
	            is.close();
	            conn.close();
	            
	            ByteArrayInputStream barIS = new ByteArrayInputStream(buf);
	            Player _player = javax.microedition.media.Manager.createPlayer(barIS, "audio/mpeg");
	            _player.start();

The problem is getLength returns 24, I doubt your MP3 is 24 bytes. I don't know what happened but if you look at the documentation for getLength it might help you find the problem.