opendl failed in alljoynlib in android

Question

I have an alljoyn library in my project to pair android devices for a voting app. In old devices the app runs properly but in new devices it stops when it is starting to run.

This is the error, I got:

Caused by: java.lang.UnsatisfiedLinkError: dlopen failed: library "libcrypto.so" not found
                      at java.lang.Runtime.loadLibrary0(Runtime.java:1016)
                      at java.lang.System.loadLibrary(System.java:1657)
                      at com.example.nima.voting.alljoyn.peergroupmanager.PeerGroupManager.<clinit>(PeerGroupManager.java:60)

Answer 1

NOTE: I'm not an Android developer.

That said, I found this StackOverflow question, which mentions similar behavior to what you described:

The master Android process is zygote. Its like init in Linux. Zygote loads OpenSSL when its start, and it loads version 0.9.8. If you link against OpenSSL 1.0.1, then you will get mysterious runtime crashes. The crashes are due to the Android loader using the 0.9.8 version of the library (already mapped from Zygote), and not your version of OpenSSL.

You can use a shared object, but your shared object must be a wrapper around the static version of libssl and libcrypto.

You mentioned that the app loads properly in old devices but crashes in new devices. If the new devices are linking against OpenSSL v1.0.1 and the old ones against v0.9.8, then this might be the root cause of your problem.

The solution seems to be either to compile against static libraries for libcrypto (and for libssl too, apparently), or to rename these dependencies after the build, then copy them into your precompiled directory (if I interpreted the answer in the link correctly):

The reason is that the system comes with its own (probably different) version of these shared libraries, and the loader will use /system/lib/libssl.so and /system/lib/libcrypto.so instead of your private copies.