I have to use OAuth for my Android client and I have found that the learning resources are pretty rare or inadequate for this technology. Does anybody know a good book/tutorial/online resource to learn OAuth?
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I have an XML resource file:
<resources> <section>
<category value="1" resourceId="@xml/categoryData1" />
<category value="2" resourceId="@xml/categoryData2" />
<category value="3" resourceId="@xml/categoryData3" />
</section> </resources>
Using XmlPullParser, on the START_TAG, I can use:
int value = parser.getAttributeIntValue(null, "value", 0);
to get values 1, 2, 3...however:
int resourceId = parser.getAttributeIntValue(null, "resourceId", 0);
doesn't work...it just yields the default value 0, or whatever I change the default value (3rd parameter) to be. Does anyone know what I am doing wrong or if this is possible?
What has people's experience been in learning Android? I'd be interested in how long it takes to get to the point where you're writing your first app, and how the experience compares to learning some other programming API. I know several professional programmers who have tried to learn Android and failed. Is it inherently more difficult or larger than you might expect? But there's a survey here http://www.infoq.com/news/2010/07/Mobile-Survey that claims Android has the shortest learning curve of all smartphone platforms. I wonder how the survey guys could have got such a perverse and unlikely result. I have my own views and observations on this, which I'll mention as a dialog develops. I don't want to bias the discussion with my perspective at this point.
View 3 Replies View RelatedCan anyone suggest me good book for learning android? And if u have copy of it then do e-mail me.
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Anyway, I thought since I'm currently trying to learn Spanish that it'd be great if there was a nice application that could help.
So does anybody know of or have any personal experience using any language learning applications that they could recommend please?
Does anyone have any recommendations for a class (online) or tutorial that teaches android programing for dummies? It's frustrating knowing exactly what you want to do and no idea how to do it. Something that uses basic language and explains each line in detail to help a person remember how to do it later. Any suggestions would be great.
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View 2 Replies View RelatedI am trying to authenticate something(in this case LinkedIn) using OAuth but the requested token always returns null?
Here is my code below:
CODE:........
I basicaly followed the example here http://donpark.org/blog/2009/01/24/android-client-side-oauth.
When using the OAuth protocol, you need a secret string obtained from the service you want to delegate to. If you are doing this in a web app, you can simply store the secret in your data base or on the file system, but what is the best way to handle it in a mobile app (or a desktop app for that matter)?
Storing the string in the app is obviously not good, as someone could easily find it and abuse it.
Another approach would be to store it on you server, and have the app fetch it on every run, never storing it on the phone. This is almost as bad, because you have to include the URL in the app. I don't believe using https is any help.
The only workable solution I can come up with is to first obtain the Access Token as normal (preferably using a web view inside the app), and then route all further communication through our server, where a script would append the secret to the request data and communicates with the provider. Then again, I'm a security noob, so I'd really like to hear some knowledgeable peoples' opinions on this. It doesn't seem to me that most apps are going to these lengths to guarantee security (for example, Facebook Connect seems to assume that you put the secret into a string right in your app).
I don't believe the secret is involved in initially requesting the Access Token, so that could be done without involving our own server. Am I correct?
I think that I've found the problem I am having with AccountManager that I described in an earlier thread that got no responses on the board.
I think it is a problem with the way that the Activity Stack is working during the OAUTH workflow. Here's the workflow as I see it. I found this problem by separating out my Activity, which I'll call M, from the oauth Activity, which I'll call O. In the course of authentication, the web browser is invoked and let's call that B.
When a user needs to start over with authentication, my application, through Activity M, starts Activity O. That, in turn, generates some magic URL that is sent to the web browser. So the browser is fired up and information was sent to the OAUTH provider to do a redirect back through the browser back to Activity O.
So, this how the OAUTH workflow looks up to the browser: M -> O -> B
At this point the user logs in and hits the Accept button and the browser then invokes my BROWSABLE activity, which, again, is O. I had thought this would unwind the above stack, but it seems that above situation disappears and what I have after the user hits Accept in the browser is this: B -> O
What I did to work around that is that I put a startActity(M) in O and that seems to work, but it is a workaround.
I believe there is something that I could do with launch modes or activity modes to fix this problem and maintain the original activity stack.
All that is happening, really, is that the O activity pauses for little while, then comes back with the goods, the login credentials. But when I tried to return the information via startActivityForResult (), nothing. Because M is no longer on the Activity Stack.
About signpost, and then went back to Twitter4J with which I have created my twitter applications when OAuth wasn't necessary. whether I should use signpost or Twitter4J's method of OAuth authentication. I have read that Twitter4J itself uses signpost for OAuth, still am not sure about the choice that I should make.
View 2 Replies View RelatedI am building an Android application that requires OAuth. I have all the OAuth functionality working except for handling the callback from Yahoo.
I have the following in my AndroidManifest.xml:
CODE:..............
Where www.test.com will be substituted with a domain that I own.
It seems :
This filter is triggered when I click on a link on a page. It is not triggered on the redirect by Yahoo, the browser opens the website at www.test.com It is not triggered when I enter the domain name directly in the browser.
When exactly this intent-filter will be triggered? Any changes to the intent-filter or permissions that will widen the filter to apply to redirect requests?
I am planning an app using the android speech input api (Speech Input | Android Developers). How the learning occurs? So for example initially my phone could not recognize proper nouns, local locations, uncommon names of my friends, etc, but now it recognizes all of these things so clearly it has learned. But are all of these words now available to other users?
I am envisioning an app when each of my users would be contributing to a database constructed by other users, so that a proper noun that someone else entered is now available to be recognized by someone who has never used my app, is this something I can count on happening automatically?
I am working on an Android application which is to serve as a simple Twitter client. I am using OAuth for authorization and have registered my application with Twitter as new OAuth client. Now when the user authorizes the application, I expect to be taken to the Callback URL(which is pointing to my application); but this is not happening.
My Problem along with source code is described in detail here: http://stackoverflow.com/questions/2199357/oauth-twitter-on-android-c...)
The following intent is launched post authorization: Intent { act=android.intent.action.VIEW dat=http://twitter.com/oauth/authorize? oauth_token=XXACTUAL_TOKEN_HEREXX8&oauth_callback=myapp:///tweet cmp=com.android.browser/.BrowserActivity }
Some how, the hypothetical URL, I provided while registering my application, gets called.
I use signpost-oauth do oauth in android, and after login on the web page, return to the Activity, the provider is null sometimes.
CODE:.....
And the manifest.xml
CODE:.....................
I don't know why the provider is null sometimes.
I'm succesfully using Signpost to authorize calls to protected resources in a Google account via OAuth.
However it seems a bit weird that the user has to go each and every time through Google and grant access. Is there a way of serializing the Consumer and recreating it so that re-authorization is not needed? I've tried keeping the tokens, secret and verifier in the shared preferences and setting them in the Consumer but I receive a OAuthExpectationFailedException.
This question here lists some good links to general Android applications (that I'm already looking over) but I'm interested at the moment in specifically games (board-type, intelligent games rather than action - in other words, I don't need real-time). What are the best sources for applications like that? I want to look over the source code to get myself up to speed quickly.
(Please don't just Google for results, I've already done that and the pickings are a little scarce. I'm interested in anyone who's actually taken time to find and evaluate good sites for this - so ideally, you'd already be an Android developer interested in developing games).
I would like to ask all of you if you know any good books, articles etc ... on development for these mobile platforms. I'm looking for learning material where the whole technology, OSes and development is discussed in great detail so i could gain a deeper understanding of the system as a whole.
View 3 Replies View RelatedPossible Duplicates:
Good book for beginning android development
The best book for programming in Android
The "best/easy to understand" "resource/tutorials/guides/book" wins the answer!
I'm really trying not be subjective here. Most guides I came up with on forums, etc., date back to 2007/2008 so I guess I want something more recent. (Some of them are reeeeeally outdated).
Android twitter Trying the following tutorial for Oauth based authentication and updating user status.
http://www.androidsdkforum.com/android-sdk-development/3-oauth-twitter.html
When i run It has successfully authenticate but when it tries to update the status following error occur.
CODE:...............
Im tryin to use Twitter with OAuth but i receive this exception.
Authorization failed (server replied with a 401). This can happen if the consumer key was not correct or the signatures did not match.
im using this sample
http://code.google.com/p/oauth-signpost/wiki/TwitterAndSignpost
Error Line:
String authUrl = provider.retrieveRequestToken(consumer, OAuth.OUT_OF_BAND);
following questions:
1. How to implement 3 legged Authentication using OAuth on Android devices? Is there a library that assists in the aforementioned?
2. What does it mean when someone says: "Site/Service ABC supports OAuth"?