Flutter 实现一个简单的音视频App（二）

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接上一篇文章，本篇文章我们要实现选取视频，并将视频封面获取出来。

1.引入image_picker和video_thumbnail 插件

  image_picker: ^0.6.6+1

其中video_thumbnail咱们是用来获取视频封面的插件，image_picker是选择视频的插件。

2.布局

我们布局一个标题和上传文件的页面。

import 'dart:io';

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

class UploadPage extends StatefulWidget {
  UploadPage({Key key}) : super(key: key);

  @override
  _UploadPageState createState() => _UploadPageState();
}

class _UploadPageState extends State<UploadPage> {

  pickVideo() async {
    File file = await ImagePicker.pickVideo(
          source: ImageSource.camera, maxDuration: const Duration(seconds: 10));
    print(file);
  }

  TextEditingController _controller = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('上传作品'),
      ),
      body: Container(
        margin: EdgeInsets.all(10),
        child: Column(
          children: <Widget>[
            TextField(
              controller: _controller,
              decoration: InputDecoration(
                icon: Icon(Icons.title),
                labelText: "给你的作品一个标题吧",
              ),
            ),
            GestureDetector(
              child: Container(
                height: 150,
                margin: EdgeInsets.only(top: 10),
                decoration: BoxDecoration(
                  color: Colors.white,
                  image: DecorationImage(
                    image: AssetImage('assets/images/cloud_upload.png'),
                    fit: BoxFit.contain,
                  ),
                ),
                alignment: Alignment.centerLeft,
                child: Text('上传作品'),
              ),
              onTap: () {
                pickVideo();
              },
            ),
          ],
        ),
      ),
    );
  }
}

3.选择视频

    File file = await ImagePicker.pickVideo(
          source: ImageSource.camera, maxDuration: const Duration(seconds: 10));
    print(file);