Open folder on card

问题

I thought this was something really simple, but it's giving me more work than the rest of the whole app.

I just want a button to open the "Downloaded Files" folder of my app. That's all. No file picker, nothing complicated. All the button has to do is open a folder with the default app (or open the app chooser if there's no default).

I tried different solutions I saw here on StackOverflow, but nothing seems to work for me.

Example 1:

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath() + "/MyDownloadedFiles/");
intent.setDataAndType(uri, "text/plain");
startActivity(Intent.createChooser(intent, getString(R.string.action_downloaded)));

On my Android 4.4, this opens the KitKat file picker, and doesn't even open in the folder I want... it seems to be defaulting to the card root. But I'm sure the folder exists and the path being given to the Intent is indeed correct.

Example 2:

Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath() + "/MyDownloadedFiles/");
intent.setDataAndType(uri, "text/plain");
startActivity(Intent.createChooser(intent, getString(R.string.action_downloaded)));

This one opens some blank activity with a popup saying: "Error occurred when getting file Content: MyDownloadedFiles".

How can I make my app to simply have a shortcut to a folder where it puts contents into?

回答1:

wow.. Finally!! After many things I tried, the only way it worked was by wrapping the URI string into a File first, and then do a Uri.fromFile:

File file = new File(Environment.getExternalStorageDirectory().getPath() + "/MyDownloadedFiles/");
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "*/*");
startActivity(Intent.createChooser(intent, getString(R.string.action_downloaded)));

回答2:

I think this one could work for you:

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath()
    + "/yourFolder/");
intent.setDataAndType(uri, "*/*");
startActivity(Intent.createChooser(intent, "Open /sdcard/yourFolder"));

来源：https://stackoverflow.com/questions/24855837/open-folder-on-card