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I want to implement inapp purchase in my app which is a free app, It will ask to buy, after purchase the new apk replace the old apk.
Thanks
Err, I think you'll need to take a different approach.
According to the Google Play Rules, "An app downloaded from Google Play may not modify, replace or update its own APK binary code using any method other than Google Play's update mechanism." So you cannot change your apk.
But you have some options:
Create a 'pro' version on the Play Store
Have a app wide setting which changes the activity behaviour, or have 2 sets of activities, as you seem to already have made... This can be triggered by an in-app purchase. The docs for that are here: http://developer.android.com/google/play/billing/api.html
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I want to build an app that allows users to register and then log in. I understand how to build the visual UI but I don't understand how I can get the code to work. I know I need to have a database that does authentication but how do I implement that with the Android SDK? Do I use MYSQL or some other database? Does anyone know any books that would help? Could someone please guide me? How about logging in with Facebook, how do I implement that? Any help would be greatly appreciated. Thank you!
What you need is an app back-end. Look at this Building app back-end article on registration and login users to your application. Or if you have a web server, you can build your own back-end using MySQL and any language of your choice.
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In my android project, whenever a user asks to see a specific #hashtag, i want to check if any tweet had changed in twitter database about this hashtag and update my database according to that changes. The problem here is, i need to run another java project in my server to get updates from twitter and change my database. But, i don't know how to call another java program when a request made from an android app.
I don't know where to start or which path i should follow. I would be appreciated if anyone show me some way.Thanks..
Hi hello_stackoverflow,
visit this page: https://dev.twitter.com/docs/api and have a look at the twitter webservice api, especially this https://dev.twitter.com/docs/api/1.1/get/search/tweets, this would provide you with the search option the API provides you. With this you can search for a custom query within tweets on twitter.
So you'll not need to call an external java application, just call the RESTful Webserive from twitter and send a query with user input hashtag.
Patrick
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I am currently a relatively new in the field of programming, and I am helping with a friend of mine on building a social network. It is already live picxter.com. However we are looking on implementing a chat feature for our users and the owner told me I should use a Java applet as it would be best suited for our needs. However is this possible? We are not trying to make a chat site type of chat. We are trying to build a chat like Facebook.
Don't use Java for these sorts of applications! Using Java in your browser is not a very good idea in general. You could try to do it in JavaScript using AJAX (which is syntactically very similar to Java and by far not as slow, doesn't require a runtime environment and isn't as risky [you can argue about that, to be honest] in terms of security).
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I have desktop simulation which is developed in java (jar file). Is there a way to convert java desktop application to an Android app.
If you would like to convert a java desktop app to an Android app, you would have to get hold of the source code and adjust to make it run on the Android platform, make it work with the Android lifecycle and make it respond to the input methods provided.
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I'm trying to build an app that should show user's files on the ListView, i've seen 2 video tutorial on Google Developers but at the end they don't explain nothing of i wanted know. Can someone explain me (maybe with code or some web example) how i can do this?
Here's how to connect to connect to a user's gDrive, also at the left there is a menu with all information you would need.. Authorize Requests, API Reference, Developer Guides and alot more.. ;)
QuickStart - https://developers.google.com/drive/quickstart-android
StartPage - https://developers.google.com/drive/
~Max