Android : Android 2.2 front camera

Android 2.2 I want to open the front camera and take a picture. Use the code:

private Camera getFrontCamera() {
    Camera camera = Camera.open();
    if (camera == null) {
        return null;
    }
    PackageManager pm = context.getPackageManager();
    if (pm.hasSystemFeature("android.hardware.camera.front")) {
        Parameters params = camera.getParameters();
        params.set("camera-id", 2);
        camera.setParameters(params);
    }
    return camera;
}

But since I have not worked. How to enable front camera on Android 2.2?