Time for action – turning an Android device into a Joypad

Let's find the device orientation and properly determine the direction.

1. Write a new file jni/Configuration.hpp to help us get device information, and more specifically device rotation (defined as screen_rot).

   Declare findRotation() to discover the device orientation with the help of JNI:

   #ifndef _PACKT_CONFIGURATION_HPP_
   #define _PACKT_CONFIGURATION_HPP_
   
   #include "Types.hpp"
   
   #include <android_native_app_glue.h>
   #include <jni.h>
   
   typedef int32_t screen_rot;
   
   const screen_rot ROTATION_0   = 0;
   const screen_rot ROTATION_90  = 1;
   const screen_rot ROTATION_180 = 2;
   const screen_rot ROTATION_270 = 3;
   
   class Configuration {
   public:
       Configuration(android_app* pApplication);
   
       screen_rot getRotation() { return mRotation; };
   
   private:
       void findRotation(JNIEnv* pEnv);
   
       android_app* mApplication;
       screen_rot mRotation;
   };
   #endif

2. Retrieve configuration details in jni/Configuration.cpp.

   First, in the constructor, use...