class FlutterAlign extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Align(
      alignment: Alignment(-1, -1),
      child: Container(
        child: Text(
          "Hello",
        ),
      ),
    );
  }
}

class FlutterAlign extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
      //在外部包一层safearea
    return SafeArea(
      child: Align(
        alignment: Alignment(-1, -1),
        child: Container(
          child: Text(
            "Hello",
          ),
        ),
      ),
    );
  }
}