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Created a new API to grant scoped directory access to applications.
The Storage Access Framework currently provides an
API (OPEN_DOCUMENT_TREE) that lets the user pick a directory to be used
by the application. Although this APIs is very powerful (for example, it
allows the user to create sub-directories, delete and share files,
etc...), it's too complex for simpler use cases like a camera
application trying to have access to the standard Pictures directory.
The new API (OPEN_EXTERNAL_DIRECTORY) simplifies this scenario by
letting the application select a standard, pre-defined directory (as
defined by android.os.Environment). The user still needs to grant access
to the requested directory, but the resulting UI will be simpler and
more straightforward.
Usage example:
// ...
int requestCode = 42;
Intent intent = new Intent(Intent.ACTION_OPEN_EXTERNAL_DIRECTORY);
intent.setData(Uri.fromFile(
new File(Environment.getExternalStorageDirectory(),
Environment.DIRECTORY_PICTURES)));
startActivityForResult(intent, requestCode);
// ...
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode != Activity.RESULT_OK) {
return;
}
Uri uri = data.getData();
int modeFlags = data.getFlags()
& (Intent.FLAG_GRANT_READ_URI_PERMISSION
| Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
getContentResolver().takePersistableUriPermission(uri, modeFlags);
}
BUG: 23011462
Change-Id: Ie832026532f74e681ef220b761667eb66ff3c8b0