title: How to get write permission on Android 7 SD-card using StorageVolume?
body: <p>Even after getting a permanent permission to write to the external storage I can't get write access to every folder of my sd-card. How to get those? For instance this app can do this, and I guess second permission dialog (under "Write permission on Android 7") is all about that. How to create that? <a href="http://www.lonelycatgames.com/wiki/xplore/write_in_android_5" rel="nofollow noreferrer">Article</a> Maybe, the solution is bound to the createAccessIntent method of StorageVolume class somehow...</p>
  
  <p>Here is a code I'm currently using to get permanent permission:</p>
  
  <pre><code>RxPermissions.getInstance(getActivity())
                  .request(Manifest.permission.WRITE_EXTERNAL_STORAGE)
                  .subscribe(granted -&gt; {
                      if (!granted) return;
                      showAlternativeDirectoryChooser(); // success
                  }, throwable -&gt; {
                  });
  </code></pre>