Question

我正在尝试将相机中的图片保存在真实设备中，但找不到方法。

现在，我将其保存在文件中，但无法在图库中保存。.

此刻我的代码是：

File _imagenTemporal;

String _opcion = "";

var imagen; 

Future getImagen(String opcion) async {

  if (opcion == "camara") {

    imagen = await ImagePicker.pickImage(source: ImageSource.camera);

  } else if (opcion == "galeria") {

    imagen = await ImagePicker.pickImage(source: ImageSource.gallery);

  }

  setState(() {
    _imagenTemporal = imagen;
  });
}

Answer 1

此插件 https://pub.dev/packages/gallery_saver 将相机或网络中的图像和视频保存到本地存储（Android和iOS）

这是它的用法：

GallerySaver.saveVideo(path)
GallerySaver.saveImage(path)

path是本地路径或网络URL。

它返回Future-如果成功保存则返回true，否则返回false（出于某种原因）。

Answer 2

我尝试了很多flutter插件来保存图像，只有这个插件有效。 Gallery_saver v1.0.7

但是该示例有一个小错误，这就是为什么我无法运行它。这是正确的示例：

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

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String firstButtonText = 'Take photo';
  String secondButtonText = 'Record video';
  double textSize = 20;

  @override
 Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
      body: Container(
        color: Colors.white,
        child: Column(
          children: <Widget>[
            Flexible(
              flex: 1,
              child: Container(
                child: SizedBox.expand(
                      child: RaisedButton(
                color: Colors.blue,
                onPressed: _takePhoto,
                child: Text(firstButtonText,
                    style:
                        TextStyle(fontSize: textSize, color: Colors.white)),
              ),
            ),
          ),
        ),
        Flexible(
          child: Container(
              child: SizedBox.expand(
            child: RaisedButton(
              color: Colors.white,
              onPressed: _recordVideo,
              child: Text(secondButtonText,
                  style: TextStyle(
                      fontSize: textSize, color: Colors.blueGrey)),
            ),
          )),
          flex: 1,
        )
      ],
    ),
  ),
));
  }

  void _takePhoto() async {
    ImagePicker.pickImage(source: ImageSource.camera).then((File recordedImage) {
  if (recordedImage != null && recordedImage.path != null) {
    setState(() {
      firstButtonText = 'saving in progress...';
    });
    GallerySaver.saveImage(recordedImage.path).then((path) {
      setState(() {
        firstButtonText = 'image saved!';
      });
    });
  }
});
  }

  void _recordVideo() async {
    ImagePicker.pickVideo(source: ImageSource.camera)
        .then((File recordedVideo) {
      if (recordedVideo != null && recordedVideo.path != null) {
        setState(() {
          secondButtonText = 'saving in progress...';
        });
        GallerySaver.saveVideo(recordedVideo.path).then((path) {
          setState(() {
            secondButtonText = 'video saved!';
          });
        });
      }
    });
  }
}

Answer 3

您可以坚持使用google's path provider plugin拍摄的Image：

本地存储路径：

directory = getApplicationDocumentsDirectory() // AppData folder path

directory = getExternalStorageDirectory() // main storage folders path,but only works on android as IOS is not currently supported.

path = directory.path ;

使用imagen功能将copy文件复制到上一步中获得的路径：
```
File savedImage = await imagen.copy('$path/saved_image.jpg');
```

可以使用您的Image应用程序访问此方法存储的这些Files，并根据平台在Gallery或Photos应用程序中建立索引。您可以找到更多有关official cookbook read and write files和path provider API documentation的信息。

Answer 4

我刚刚为此编写了album_saver插件

这可以同时在IOS和Android上使用。

import 'package:album_saver/album_saver.dart';
import 'package:image_picker/image_picker.dart';

File image = await ImagePicker.pickImage(source: ImageSource.gallery);

// Save to ablum
AlbumSaver.saveToAlbum(filePath: image.path, albumName: "YourAlbumName");

// Create album
// In Android, it will create a folder in DCIM folder
AlbumSaver.createAlbum(albumName: "YourAlbumName");

// Get DCIM folder path (just work on Android)
AlbumSaver.getDcimPath();

Answer 5

*我针对此问题的解决方案是SharedPreferences-将FileName.path存储为字符串并恢复到File（path）;也许这对某人有帮助*

 //global variables:
  File imageFile;
  String finalPath;

  //store string value
  Future<void> storeSharedPrefs(String key, String value) async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString(key, value);
  }

  //restore string value
  Future<String> restoreSharedPrefs(String key, String inputValue) async {
    final prefs = await SharedPreferences.getInstance();
    final value = prefs.getString(key);

    if (value == null) {
      return null;
    }

    setState(() {
      inputValue = value;
    });

    return inputValue;
  }

  //load saves
  void loadPrefs() async {
    try {
      //restore saved shared prefs:
      finalPath = await restoreSharedPrefs('image', finalPath);

      //load imageFile with restored shared prefs path:
      this.setState(() {
        if (finalPath != null) imageFile = File(finalPath);
      });
      debugPrint('restored path is: $finalPath');
    } catch (e) {
      print('loading error: $e');
    }
  }

  @override
  void initState() {
    super.initState();
    loadPrefs();
  }

Answer 6

pickImage已弃用。您应该使用ImagePicker.getImage（）。

More Information

使用以下代码存储相机或图库中的照片。


//getImage(ImageSource.camera) or getImage(ImageSource.gallery)

void getImage(ImageSource imageSource) async {
    PickedFile imageFile = await picker.getImage(source: imageSource);
    if (imageFile == null) return;
    File tmpFile = File(imageFile.path);
    final appDir = await getApplicationDocumentsDirectory();
    final fileName = basename(imageFile.path);
    localFile = await tmpFile.copy('${appDir.path}/$fileName');
    setState(() {
      _image = localFile;
    
    });
  }

颤振如何将照片从相机保存到设备？

6 个答案: