Android代码片段一：根据Android版本使用Animation跳转Activity

    public void startActivity(Intent intent, int animationEnterId, int animationLeaveId) {
    Activity activity = this;
    activity = TinyUtils.getRootActivity(this);
    if (activity == this) {
        super.startActivity(intent);
    } else {
        activity.startActivity(intent);
    }
    try {
        if (Integer.parseInt(android.os.Build.VERSION.SDK) > 4 && animationEnterId > 0 && animationLeaveId > 0) {
        Reflector.callMethod(activity, "overridePendingTransition", new Class<?>[] { int.class, int.class },
            new Object[] { animationEnterId, animationLeaveId });
        }
    } catch (Exception ex) {
    }

    }

public class TinyUtils {
    public static Activity getRootActivity(Activity activity) {
    Activity parent;
    while ((parent = activity.getParent()) != null) {
        activity = parent;
    }
    return activity;
    }
}