如何在Flutter上为Android 10上的MediaStore(SDK 29)贡献文件? [英] How can I contribute files to MediaStore (SDK 29) on Android 10 in Flutter?

问题描述

我想将文件保存到Android用作默认Downloads目录的Download文件夹中.我发现可以通过使用

我该怎么做?这些文件似乎是在上述目录中创建的，但是我无法通过其他应用访问它们.

我对于开发Android相对较新，因此请提前对可能很愚蠢的问题感到抱歉...我无法通过阅读其他问题并谷歌搜索找到答案:/

解决方案

Flutter的 path_provider API由于Android 10及更高版本上的Android更改而遇到问题(未解决的问题).这应该是固定的-

https://github.com/flutter/flutter/issues/35783

就目前而言，通过Flutter获取iOS/Android Download 目录的最可靠方法似乎是-

 字符串dir;if(Platform.isAndroid){dir ="/存储/模拟/0/下载/";//虽然不是很优雅，但是可以用}否则if(Platform.isIOS){dir =(等待getDownloadsDirectory()).path;}打印(目录); 

希望这会有所帮助.

I want to save files to the Download folder used by Android as the default Downloads directory. I have found out that this should be possible by using MediaStore.downloads, but I have no clue how to do that in flutter! When using

List<Directory> android_dir =
        await getExternalStorageDirectories(type: StorageDirectory.downloads);
    String android_path = android_dir[0].path;

from the path_provider package, I seem to get a path to my application-specific directory

/storage/emulated/0/Android/data/com.mediaconverter/files/Download/

which doesn't seem easily accessible by the user through file browser apps.

Since Android 10 is deprecating ExtStorage.getExternalStoragePublicDirectory from the ExtStorage package, I am trying to find a way to accomplish saving files which can easily be accessed by the users. This is the folder which I want to target:

How can I accomplish that? The files seem to be created in the above-mentioned directory, but I can't access them through other apps.

I'm relatively new to developing for Android, so sorry in advance for the probably stupid question ... I couldn't find an answer by reading other questions and googling :/

解决方案

Flutter's path_provider API is experiencing problems (open issues) due to Android changes taking place for Android 10 and above. This should be fixed -

https://github.com/flutter/flutter/issues/35783

For now, the most reliable way of getting iOS/Android Download directory via flutter seems to be this -

  String dir;
  if(Platform.isAndroid) {
    dir = "/storage/emulated/0/Download/"; //not elegant, but it works
  }else if(Platform.isIOS) {
    dir = (await getDownloadsDirectory()).path;
  }
  print(dir);

Hope this helps.

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