Get all files and folders list with Dropbox Core API for Android

问题

I want my app user to be able to view Dropbox files and folders, so that he/she can choose one of them and use in my app.

For this I used Dropbox Core API like this:

private DropboxAPI<AndroidAuthSession> mDBApi;

    AppKeyPair appKeys = new AppKeyPair(Constants.DROPBOX_APP_KEY, Constants.DROPBOX_APP_SECRET);
    AndroidAuthSession session = new AndroidAuthSession(appKeys);
    mDBApi = new DropboxAPI<AndroidAuthSession>(session);

On my button click, I started authorization:

    mDBApi.getSession().startOAuth2Authentication(MainActivity.this);

and handled this in onResume(), like this

    if (mDBApi.getSession().authenticationSuccessful()) {
        try {
            // Required to complete auth, sets the access token on the session
            mDBApi.getSession().finishAuthentication();

            String accessToken = mDBApi.getSession().getOAuth2AccessToken();

            storeAccessToken(accessToken);
            setLoggedIn(true);

            Log.v("DbAuthLog", "DB Authentication successful");
        } catch (IllegalStateException e) {
            Log.i("DbAuthLog", "Error authenticating", e);
        }
    }

where setLoggedIn() is:

    private void setLoggedIn(boolean isLoggedIn) {
    AccessTokenPair access = new AccessTokenPair(Constants.DROPBOX_APP_KEY, Constants.DROPBOX_APP_SECRET);
    mDBApi.getSession().setAccessTokenPair(access);

    if (isLoggedIn) {
        String[] fnames = null;
        DropboxAPI.DeltaPage<DropboxAPI.Entry> dirent = null;
        try {
            dirent = mDBApi.delta("");
            //dirent = mDBApi.metadata("/", 100, null, true, null);

            ArrayList<DropboxAPI.DeltaEntry<DropboxAPI.Entry>> files = new ArrayList<>();
            ArrayList<String> dir=new ArrayList<String>();
            int i = 0;
            for (DropboxAPI.DeltaEntry<DropboxAPI.Entry> ent: dirent.entries)
            {
                files.add(ent);// Add it to the list of thumbs we can choose from
                //dir = new ArrayList<String>();
                dir.add(new String(files.get(i++).lcPath));
            }
            i=0;
            fnames=dir.toArray(new String[dir.size()]);
        } catch (DropboxException e) {
            e.printStackTrace();
        }
    }
}

But this throws exception, saying 'Failure delivering result to activity'.

Please suggest, I need a list of all files and folders.

Logcat:

W/DefaultRequestDirector: Authentication error: Unable to respond to any of these challenges: {oauth=Www-Authenticate: OAuth realm="https://api.dropbox.com/"}

W/System.err: com.dropbox.client2.exception.DropboxUnlinkedException
at com.dropbox.client2.RESTUtility.parseAsJSON(RESTUtility.java:263)
at com.dropbox.client2.RESTUtility.execute(RESTUtility.java:415)
at com.dropbox.client2.RESTUtility.execute(RESTUtility.java:339)
at com.dropbox.client2.RESTUtility.streamRequest(RESTUtility.java:194)
at com.dropbox.client2.RESTUtility.request(RESTUtility.java:124)
at com.dropbox.client2.DropboxAPI.delta(DropboxAPI.java:2476)
at   com.example.admin.cloudintegrationsample.MainActivity$DownloadFilesTask.doInBackground(MainActivity.java:130)
at com.example.admin.cloudintegrationsample.MainActivity$DownloadFilesTask.doInBackground(MainActivity.java:125)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
06-22 13:23:50.194 14336-15079/com.example.admin.cloudintegrationsample  W/IdleConnectionHandler: Removing a connection that never existed!

来源：https://stackoverflow.com/questions/37961423/get-all-files-and-folders-list-with-dropbox-core-api-for-android

标签

android

dropbox-api