How to add a JNI library module to the compilation process?

6577 Android v4.1
6589 Android v4.2
 
For example, add a directory under the Alps \ packages \ apps \ settings directory and add JNI and Android. MK file, run. /mK mm packages \ apps \ settings directory. The JNI directory is displayed. the so library file is generated in the out \ target \ product \ ztenj89_cu_jb \ System \ lib directory, but executed. /mK new, the corresponding so library is not generated.
[Solution]
1. Set local_module_tags to optional in the Android. mk file under Alps \ packages \ apps \ Settings.
2. Modify the build \ target \ product \ $ project. mk file and add the added Module name to product_packages.