Android rayshader sample.

samples/android_sample/jni/dart_host.h

+#ifndef DART_HOST_H
+#define DART_HOST_H
+
+#include <android_native_app_glue.h>
+#include "include/dart_api.h"
+#include "bin/dartutils.h"
+#include "activity_handler.h"
+#include "input_service.h"
+#include "timer.h"
+#include "graphics.h"
+#include "context.h"
+#include "vm_glue.h"
+
+// Currently the life cycle management is very crude. We conservatively
+// shutdown the main isolate when we lose focus and create a new one when
+// we resume. This needs to be improved later when we understand this better,
+// and we need some hooks to tell the Dart script to save/restore state
+// (and an API that will support that).
+
+class DartHost : public ActivityHandler {
+ public:
+  DartHost(Context* pContext);
+  virtual ~DartHost();
+
+ protected:
+  int32_t onActivate();
+  void onDeactivate();
+  int32_t onStep();
+
+  void onStart();
+  void onResume();
+  void onPause();
+  void onStop();
+  void onDestroy();
+
+  void onSaveState(void** pData, int32_t pSize);
+  void onConfigurationChanged();
+  void onLowMemory();
+  void onCreateWindow();
+  void onDestroyWindow();
+  void onGainedFocus();
+  void onLostFocus();
+
+ private:
+
+  void clear();
+  int32_t activate();
+  void deactivate();
+
+  ANativeWindow_Buffer mWindowBuffer;
+  InputHandler *mInputHandler;
+  Timer* mTimer;
+  Graphics *mGraphics;
+  VMGlue *mVmGlue;
+  bool mActive;
+};
+
+#endif
+