Hybrid 3D Graphics with OpenGL and JNI - Pro Android Games - page 139

.println("Loading JNI lib using abs path:" + LIB_PATH);
System.load(LIB_PATH);
}

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

mGLSurfaceView = new GLSurfaceView(this);

try {
mGLSurfaceView.setRenderer(new CubeRenderer(true, true));
setContentView(mGLSurfaceView);

} catch (Exception e) {
e.printStackTrace();
}
}

@Override
protected void onResume() {
// Ideally a game should implement onResume() and onPause()
// to take appropriate action when the activity loses focus
super.onResume();
mGLSurfaceView.onResume();
}

@Override
protected void onPause() {
// Ideally a game should implement onResume() and onPause()
// to take appropriate action when the activity loses focus
super.onPause();
mGLSurfaceView.onPause();
}
}

The following new files will be added to the project (see Figure 5-5):

• Native activity : This is the main entry point to the application. It can be run from

its own launcher on the device.

• Native interface class : This is a new Java class that contains the native methods to

be invoked within the renderer thread.

Native cube renderer ( cuberenderer.c ): This is the C equivalent of
CubeRenderer.java . It initializes the scene and draws a frame. It also contains all
the JNI callbacks.

•

Native cube ( cube.c ): This file is equivalent to Cube.java ; it draws the cube.
Three files will be updated to accommodate the native calls: CubeRenderer ,
GLSurfaceView, and GLThread.

•