Android: Java, C or C++?

Question

I wrote some simple apps in Android using Java.
But later I found this:

It provides headers and libraries that allow you to build activities, hand

Answer 1

For CPU intensive applications such as, Computer Graphic apps, Games, Simulations, AI/SI, Digital Image Processing, or Computer Vision, go for C/C++. If you're building a small application that only deals with data (JSON, XML), the representation of it, or small graphics apps (board games, retro games during the 90s), then JAVA is enough.