Is adding a libjitsi dependency to an Android project feasible?

Question

I am actually working on an Android VOIP application that let user create conference with other users. My constraints are to avoid any use of a server like SIP servers to realise it and if I have to use a external library, it should be under LGPL license. I have succesfully done it in a peer-to-peer fashion using the AudioGroup and AudioStream classes of the android RTP stack.

My problem occurs in a 3-peers conference. Using AudioGroup, I have enabled the MODE_ECHO_SUPPRESSION but the results are very poor and I can hear my echo after 3 seconds. I came to conclusion that the Android RTP stack was not a good solution to my problem beacause using AudioGroup make impossible to tweek the sound and echo suppression seems to function badly.

By testing VOIP applications, I discovered a lot that were working pretty weel and more precisely Jitsi (homepage) which use a java library based on native code for the RTP stuff under the LGPL licence. I tried to follow this tutorial to use libjitsi but unfortunatly it gives me an error... At this time, I'm not sure that it is possible to use Libjitsi on an android project as it is normally used in Java projects.

Steps I went trough to get the error (using Android Studio)

• I have compiled libjitsi from the build.xml contained in the sources and putted the resulting jar directly in the lib/ folder of my project.
• I have added a dependency to libjitsi.jar in my build.gradle file
• Called the static method Libjitsi.start() in the onCreate method of an activity

Error log

01-02 17:06:48.304 1523-1523/com.test.example I/LibJitsi﹕ Failed to initialize LibJitsi backend org.jitsi.impl.libjitsi.LibJitsiOSGiImpl. (Exception stack trace follows.) Will try an alternative. java.lang.NoClassDefFoundError: org.osgi.framework.FrameworkUtil at org.jitsi.impl.libjitsi.LibJitsiOSGiImpl.(LibJitsiOSGiImpl.java:34) at java.lang.Class.newInstanceImpl(Native Method) at java.lang.Class.newInstance(Class.java:1319) at org.jitsi.service.libjitsi.LibJitsi.start(LibJitsi.java:227) at org.jitsi.service.libjitsi.LibJitsi.start(LibJitsi.java:171) at com.test.example.ui.createconf.CreateConfActivity.onCreate(CreateConfActivity.java:76) at android.app.Activity.performCreate(Activity.java:4465) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992) at android.app.ActivityThread.access$600(ActivityThread.java:127) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4441) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) at dalvik.system.NativeStart.main(Native

Now if anyone already tried to use libjitsi on an AndroidProject or if you know it's not feasible, I would really be gratefull if you share your experience with me.

Thanks

Answer 1

Yes libjitsi dependency can be added to android, you can try jitsi-android which is an Android port of the Jitsi project . I have tried to run their sample app and it compiled fine.

However , I have shared 5 different libraries for VOIP calling on android in another answer you can have a look and try them.

Njoy!