jndn

These are for the SQLite file in the default ~/.ndn folder which doesn't exist on Android. It is necessary to supply the file location to the AndroidSqlite3Pib constructor. Can you use the KeyChain constructor which takes a AndroidSqlite3Pib instance?

https://github.com/named-data/jndn/blob/master/src/net/named_data/jndn/security/KeyChain.java#L166

Sure, thank you for the explanation.

By the way, if it is possible, could you please add note in comment for each method to illustrate whether a method should or should not be used on Android platform? It's hard to pick the right one given that there are so many constructors.

The default KeyChain constructor says "To create a security v2 KeyChain on android, you must use the KeyChain constructor to provide AndroidSqlite3Pib and TpmBackEndFile objects which are initialized with the explicit directory for the Android filesDir."