Issues traversing through directory hierarchy with Android Storage Access Framework / DocumentProvider using MTP

Question

UPDATE: My initial question may be misleading so I want to rephrase it: I want to traverse through the hierarchy tree from an MTP connected device through Android\'s Storage

Answer 1

I am using your code to go in sub folders with adding lines:

Uri childrenUri;
try {
    //for childs and sub child dirs
    childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(uri, DocumentsContract.getDocumentId(uri));
} catch (Exception e) {
    // for parent dir
    childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(uri, DocumentsContract.getTreeDocumentId(uri));
}