app直播系統原始碼，Flutter拍照與選擇照片並且儲存到本地實現的相關程式碼

核心程式碼：

final picker = ImagePicker(); //初始化
///存放的圖片
File _imgPath;
Future getImage(bool isTakePhoto) async {
 try {
  var pickedFile = await picker.getImage(
    source: isTakePhoto ? ImageSource.camera : ImageSource.gallery);
  if (pickedFile != null) {
   setState(() {
    _imgPath = File(pickedFile.path);
   });
  } else {
   print('沒有選擇任何圖片');
  }
 } catch (e) {
  print("該手機不支援相機");
 }
}

​具體程式碼：

import 'dart:io';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
class ImageTest extends StatefulWidget {
 @override
 State<StatefulWidget> createState() => ImageState();
}
class ImageState extends State<ImageTest> {
 final picker = ImagePicker();
 File _imgPath;
 Future getImage(bool isTakePhoto) async {
  try {
   var pickedFile = await picker.getImage(
     source: isTakePhoto ? ImageSource.camera : ImageSource.gallery);
   if (pickedFile != null) {
    setState(() {
     _imgPath = File(pickedFile.path);
    });
   } else {
    print('沒有選擇任何圖片');
   }
  } catch (e) {
   print("該手機不支援相機");
  }
 }
 @override
 Widget build(BuildContext context) {
  return Scaffold(
   body: ListView(
    children: [
     MaterialButton(
       minWidth: 100,
       height: 100,
       color: Colors.blue,
       onPressed: () {
        getImage(true);
       },
       child: Text(
        "拍照",
        style: TextStyle(fontSize: 32, color: Colors.white),
       )),
     SizedBox(
      height: 30,
     ),
     MaterialButton(
       minWidth: 100,
       height: 100,
       color: Colors.blue,
       onPressed: () {
        getImage(false);
       },
       child: Text("選擇照片",
         style: TextStyle(fontSize: 32, color: Colors.white))),
     _imgPath != null
       ? Image.file(
         _imgPath,
         fit: BoxFit.cover,
        )
       : Center(
         child: Text(
         "沒有選擇照片",
         style: TextStyle(fontSize: 32, color: Colors.black)s,
        ))
    ],
   ),
  );
 }
}

注意：此處儲存的圖片存放在快取中，如果需要儲存到本地則需使用image_gallery_saver，用於儲存。

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