hasSurface = false;
inactivityTimer = new InactivityTimer(this);

SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
SurfaceHolder surfaceHolder = surfaceView.getHolder();
if (hasSurface) {
	initCamera(surfaceHolder);
} else {
	surfaceHolder.addCallback(this);
	surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}