Android NDK Beginner's Guide - Second Edition

Time for action – handling touch events

Let's intercept touch events in DroidBlaster:

1. In the same way that we created ActivityHandler to process application events in Chapter 5, Writing a Fully Native Application, create jni/InputHandler.hpp to process input events. The input API is declared in android/input.h. Create onTouchEvent() to handle touch events. These events are packaged in an AInputEvent structure. Other input peripherals will be described later in this chapter:

   #ifndef _PACKT_INPUTHANDLER_HPP_
   #define _PACKT_INPUTHANDLER_HPP_
   
   #include <android/input.h>
   
   class InputHandler {
   public:
       virtual ~InputHandler() {};
   
       virtual bool onTouchEvent(AInputEvent* pEvent) = 0;
   };
   #endif

2. Modify the jni/EventLoop.hpp header file to include and handle an ...