I'm trying the object detection API (Git repo) from Tensorflow with android and when I build the project with bazel everything works fine and the libstensorflow_demo.so is there and loads normally. But when I try to to build the project with Gradle only and manually add the library to the JniLibs following this and this Github issue but I get the error mentioned in the title with an other error : 
ObjectTracker: Native object tracking support not found. See tensorflow/examples/android/README.md for details.
Anyone encountered this problem?