Plan to upgrade build environment for ros2 android example?

[INGU2018]

I have two questions.

1. The ros2 android sample app is buildable only on certain Android environments. (ndk: 16r, sdk: platform-21 (android N), Gradle 3.3 ..) If the Gradle version or sdk version is not correct, the app will not be built. Are you going to work on tailoring these build environments to the latest development environment?

2. Android talker, Listener operation confirmed. However, sometimes after a restart of app, talkers or listeners may not work. Is there a any way to debug this issue?

[jacobperron]

Are you going to work on tailoring these build environments to the latest development environment?

Due to resource constraints, I suspect it will be difficult for us to support different build environments. I hope we can support at least one, recent, environment. Relates to #81

Android talker, Listener operation confirmed. However, sometimes after a restart of app, talkers or listeners may not work. Is there a any way to debug this issue?

I'm not well versed in Android development, so I'm not sure at this time the best way to debug issues like this.