Clone linphone-android project from git and build using android NDK R9. Build it on linux and before starting build, make sure that you have all the packages mentioned in README file.
To build the project, just type:
# make
and after successful compilation, generate linphone SDK using following command:
# make linphone-sdk
It will generate a zip file congaining linphone.jar file and native .so modules in different directories for different architectures.
Create a new android application project in eclipse, copy linphone.jar and other directories in libs directory under newly created android project, and refresh your project in eclipse. It will automatically add linphone.jar and other native linux (android) modules.
You are good to go... import packages in your android activities use the API.