Flutter 错误：类型为'；小部件'；can'；不能分配给类型为'；文件'；

“文件_图像”以类状态声明，并且声明小部件主体中的编码意味着“null->image”（同步？）。但是这种编码是不合适的。 我该怎么办

我什么都做不了

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';

class CreatePage extends StatefulWidget {
..@override
...._CreatePageState createState() => _CreatePageState();
}

class _CreatePageState extends State<CreatePage> {
..final textEditingController = TextEditingController();
..File _image;
..@override
..void dispose() {
....textEditingController.dispose();
....super.dispose();
..}
..@override
..Widget build(BuildContext context) {
....return Scaffold(
......appBar: _buildAppBar(),
......body: _buildBody(),
......floatingActionButton: FloatingActionButton(onPressed: _getImage,
......child: Icon(Icons.add_a_photo),
....),
....);
..}

..Widget _buildAppBar() {
....return AppBar(
......actions: <Widget>[
........IconButton(
..........icon: Icon(Icons.send), onPressed: () {},
..)
..],
..);
..}

Widget _buildBody() {
..return SingleChildScrollView(
.....child: Column(
.....children: <Widget>[
_image = null ? Text('No image'): Image.file(_image), // problem coding
.....TextField(
.....decoration: InputDecoration(hintText: 'write context'),
.....controller: textEditingController,
..)
..],
..),
..);
..}

Future _getImage() async {
..File image = await ImagePicker.pickImage(source: ImageSource.gallery);
..setState(() {
.._image = image;
..});
..}
..}

导入'dart:io'；
进口“包装：颤振/材料.省道”；
导入“包：image_picker/image_picker.dart”；
类CreatePage扩展StatefulWidget{
..@覆盖
...._createPageStatecreateState（）=>_CreatePageState（）；
}
类_CreatePageState扩展状态{
..最终文本编辑控制器=文本编辑控制器（）；
..文件_图像；
..@覆盖
…无效处置（）{
..…textEditingController.dispose（）；
…超级处理（）；
..}
..@覆盖
…小部件构建（构建上下文）{
……返回脚手架(
…appBar:_buildAppBar（），
…主体：_buildBody（），
…浮动操作按钮：浮动操作按钮（按下时：\u getImage，
……子：图标（图标。添加照片），
....),
....);
..}
…小部件_buildAppBar（）{
…返回AppBar(
……行动：[
……我的钮扣(
图标：图标（Icons.send），按下时：（）{}，
..)
..],
..);
..}
小部件_buildBody（）{
…返回SingleChildScrollView(
…子：列(
……儿童：[
_image=null？Text（'No image'）：image.file（\u image），//编码问题
…文本字段(
..…修饰：输入修饰（hintText:“写入上下文”），
..…控制器：文本编辑控制器，
..)
..],
..),
..);
..}
Future\u getImage（）异步{
..File image=wait ImagePicker.pickImage（来源：ImageSource.gallery）；
…设置状态（）{
.._image=图像；
..});
..}
..}

我看到了像写instargram这样的图像选择。

替换

_image = null ? Text('No image'): Image.file(_image), // problem coding

与

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天啊。。。。。。。我从来不知道，非常感谢！！上帝保佑你10000000年TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT

_image == null ? Text('No image'): Image.file(_image), // problem solved