Help with Netty use on Android

[cobe24]

Hi everyone,

I'm new to Netty, and I'm trying to use Netty to write a server on Android
device.
I encountered a problem with Netty binding to a port on Android device, the
code is like below:

       
        int portNum = 25336;
        bootstrap = new ServerBootstrap(new NioServerSocketChannelFactory(
				Executors.newCachedThreadPool(), Executors
				.newCachedThreadPool()));
		
	bootstrap.setOption("keepAlive", true);
	bootstrap.setOption("child.tcpNoDelay", true);
        bootstrap.setOption("child.keepAlive", true);
        bootstrap.setOption("child.reuseAddress", true);
        bootstrap.setOption("child.connectTimeoutMillis", 100);
        bootstrap.setOption("readWriteFair", true);

	// channel group is used for closing connection properly
	channelGroup = new DefaultChannelGroup();
		
	// Configure the pipeline factory.
	ServerPipelineFactory pipelineFactory = new ServerPipelineFactory();
	pipelineFactory.setInstrumentation(this);
	bootstrap.setPipelineFactory(pipelineFactory);
		
	// NOTE: This is a work around to prevent the bad address error.
	// This was a bug exposed on Android 2.2
	// http://code.google.com/p/android/issues/detail?id=9431
	System.setProperty("java.net.preferIPv6Addresses", "false");
		
	// Bind and start to accept incoming connections.
	Channel channel = null;
	try{
		byte ip[] = new byte[] { 10, 0, 2, 15};
		InetAddress address1 = InetAddress.getByAddress(ip);
			
	        //channel = bootstrap.bind(new
InetSocketAddress(InetAddress.getLocalHost(), portNum));
		channel = bootstrap.bind(new InetSocketAddress(address1, portNum));
	}
	catch(ChannelException e){
		Log.e(TAG, "ChannelException "+e.getMessage()+"at port: "+portNum);
		}
	catch(Exception e){
		Log.e(TAG, "exception message:"+e.getMessage());
		}
		
	channelGroup.add(channel);

My problem is that whether I specify an ip explicitly(10.0.2.15), or bind to
the loopback ip(commented out), the calling to ServerBootstrap.bind(...)
always throws an ChannelException, and it says that "failed to open a server
socket".

I've already added the permisson below to Android Manifest file:
	

I'm wondering if I'm not using Netty correctly.
And if you have experienced such problems before? If so, how did you resolve
it?

Thanks a lot!

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