Android RTP Sample (Receiving via VLC player)

Simple demonstrate application for creating rtp audio stream using android.net.rtp package

   RTP Sender    : Android Application
   RTP Receiver : VLC Player

 Source :RtpSender (SVN)
 Zipped Source : RTPSender.zip

 Steps :   
       Create new android project with minimum sdk vesrion 12
       Open the MainActivity.java and make below code changes

    

package com.javaorigin.rtpsender;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

import android.app.Activity;
import android.content.Context;
import android.media.AudioManager;
import android.net.rtp.AudioCodec;
import android.net.rtp.AudioGroup;
import android.net.rtp.AudioStream;
import android.net.rtp.RtpStream;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;

public class MainActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
  StrictMode.setThreadPolicy(policy);
  try {   
      AudioManager audio =  (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
      audio.setMode(AudioManager.MODE_IN_COMMUNICATION);
      AudioGroup audioGroup = new AudioGroup();
      audioGroup.setMode(AudioGroup.MODE_NORMAL);        
      AudioStream audioStream = new AudioStream(InetAddress.getByAddress(getLocalIPAddress ()));
      audioStream.setCodec(AudioCodec.PCMU);
      audioStream.setMode(RtpStream.MODE_NORMAL);
                           //set receiver(vlc player) machine ip address(please update with your machine ip)
      audioStream.associate(InetAddress.getByAddress(new byte[] {(byte)192, (byte)168, (byte)1, (byte)19 }), 22222);
      audioStream.join(audioGroup);
     
   
  } catch (Exception e) {
   Log.e("----------------------", e.toString());
   e.printStackTrace();
  }
 }
public static byte[] getLocalIPAddress () {
    byte ip[]=null;
       try {
           for (Enumeration en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
               NetworkInterface intf = en.nextElement();
               for (Enumeration enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                   InetAddress inetAddress = enumIpAddr.nextElement();
                   if (!inetAddress.isLoopbackAddress()) {
                    ip= inetAddress.getAddress();
                   }
               }
           }
       } catch (SocketException ex) {
           Log.i("SocketException ", ex.toString());
       }
       return ip;
       
 }
 

}

please update the corresponding  remote ip address
Add  below permissions to AndroidManifest.xml
   

    
    <uses-permission android:name="android.permission.INTERNET" >
    </uses-permission>

    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" >
    </uses-permission>

    <uses-permission android:name="android.permission.RECORD_AUDIO" >

    </uses-permission>

    

Run the above rtp sender application
Now start the vlc player and click Media-->Open Network Stream menu
Enter the following url  (please update with your machine ip) and click play button
  
         rtp://192.168.1.19:22222

Now you can hear the voice  and analysis the receiving data using following vlc options

     Open  Tools--->Codec Information