Custom Paint Path On Stack On Parent-CodePudding

I am new to flutter, my issue comes with custom paint on nested stack, when keyboard showing, custom paint are resizing, its happen on android and ios.

Stack(
  children: [
    Container(
      decoration: const BoxDecoration(
        gradient: LinearGradient(
          begin: Alignment.topRight,
          end: Alignment.centerLeft,
          colors: [gPurple, gPurple, gBlue],
        ),
      ),
    ),
    Container(
      padding:
          const EdgeInsets.only(top: 120, bottom: 160, left: 20, right: 20),
      child: Stack(
        children: [
          CustomPaint(
            size: Size(MediaQuery.of(context).size.width, 400),
            painter: CurvedPainterTop(),
          ),
          CustomPaint(
            size: Size(MediaQuery.of(context).size.width, 800),
            painter: CurvedPainterBottom(),
          ),
        ],
      ),
    ),
    Padding(
      padding: const EdgeInsets.only(top: 60),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: const [
          Text(
            "Login",
            textAlign: TextAlign.center,
            style: txtHmAmount,
          )
        ],
      ),
    ),
    Padding(
      padding: const EdgeInsets.only(top: 140, left: 40, right: 40),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          const Text("Email", style: txtHmTMenuB),
          Row(children: const [
            Icon(Icons.mail_outline, color: Colors.grey, size: 25),
            SizedBox(width: 10),
            Expanded(child: TextField())
          ]),
          const SizedBox(height: 20),
          const Text("Password", style: txtHmTMenuB),
          Row(children: const [
            Icon(Icons.lock_outline, color: Colors.grey, size: 25),
            SizedBox(width: 10),
            Expanded(child: TextField())
          ]),
        ],
      ),
    )
  ],
);

before keyboard show

after keyboard show

on iOS Simulator

any suggest what should do to keep stack still as 1st picture?

Thanks before

CodePudding user response：

Set resizeToAvoidBottomInset to false for your Scaffold