Develop Reference

My application server side

I finished developing my client side application in Android.
I want to create a sign-up page and Page Login.
When the user login my app he selects several categories.
I want to show all the categories that users select a certain page. Please give me some tips for this. Do I need server side for this? If I do, where am I supposed to start? Thanks for help and sorry for weak English.

Unless you need to get the categories from the server, then this seems like something on the client side. In HTML, you can show a bunch of categories with < select >, which you can see here: http://www.w3schools.com/tags/tag_option.asp
If you're doing it in an Android app, you can use Spinner.

How to pass data from a web page to an app which is about to be installed on iOS and Android

Is this possible to achieve on iOS and Android with the least manual operation?
The user visit the web page W and W stores data D somewhere (in the device or the server).
The user install app A and A get D (from the device or the server).
I can only think two ways to indirectly achieve the same result:
W asks the user to copy D into the device's clipboard, and then A asks the user to paste D in the app.
W asks the user to write some random string X (and save the mapping from X to D), and then B asks the user to type X (and get D by sending X to backend).
Btw, after googling a while, it looks like current mobile browsers cannot access the clipboard, and W3C is just writing the draft of clipboard API (2014/09/18 http://www.w3.org/TR/clipboard-apis/ ), so using clipboard as a "hack" to pass data automatically is not possible currently.

We also struggled with this when we built our last mobile app, Kindred Photobooks. We actually created a native library for iOS and Android to do just this - give you the ability to pass data past install. The best way we found is to basically bundle that information in the link and use fingerprinting to make that data available after install, which is working really well.
You can try to build fingerprinting in in house as well - basically create an outstanding device fingerprint once someone clicks on the link and match it to the fingerprint that you create once a user
We automated everything and made sure all the edge cases work on both Android and iOS. Check us out at branch.io and if you are curious on how our links work, you can read more here.

I don't exactly what you want to do, but, you can for example, on the web page, ask the user to enter some info, and then you send to his email a code, then he can share that code with other people, and inside the application, you create a section, so user can enter a code. Using that code, the app makes an HTTP call to the server, and the response can be the info entered by the first user. Of course you are going to need a database.

Which way is better efficient to log user's activites(history) in android?

I develop the app which is provide some information to general user. it is not only showing info but also curating and recommending further detail info depending on users history;what the users clicked, searched and acted on the app. (like a google targeting AD).
For this, I have to accumulate user's activites on apps. (which button was clicked, when did they turn on the app and so on...)
For this, I have two ideas.
1. let the app to leave their log text file in local device then append lines in it whenever user act, and upload it when they turn off the app on server DB.[like a batch]
-OR-
2. let the app, update db everytime when user acts something on app by http-post.[like a realtime]
Which way is common tactics(or popular ways) on real field? or can you suggest another way?
thanks for reading.

IOS / Android: Can I retrieve clickthrough data from inside an app?

I'm trying to find a way to figure out how to retrieve clickthrough information to figure out which ad / link was clicked to direct a person to download it.
Say we have the following situation:
User sees an ad for the app.
They click it
It directs them to the app store, and they download it from there.
They run the app
Is there any way at all to figure out the source of the click in step 2? This is for advertising analytics - we want to know where our clicks are coming from.
I know that the site visited in step 1 can theoretically retrieve device data and link it up to device data retrieved by the app. However, we're looking for a more direct approach.
I've had a great deal of difficulty locating information on this, so any assistance would be appreciated.
We're using the Flurry API on IOS and Android.
Thanks!

May be you can check the touchEvent point location, when the ad bannber frame rect contains the touchpoint , we can treat that as a click ad event.

How to display facebook Online friends in my android application?

I want to display my facebook online friends and offline friends suppurate.But i don't know how to display.But I am getting all my facebook friends into list in my application.
Any one please help me.....How to display online and offline friends suppurate.

First - use the fb api. get the friends.
Second - show the list in beautiful Ui component or what ever.
So I understand that you have done the first, right?
If so, then what stops you to make some container and push back dynamically to it labels for example. After this you can try some more beautiful solution how I sad..
try explain more what you've done... Be more specific, please. :)
EDIT 1
Here you are: https://developers.facebook.com/docs/reference/fql/user
Use that:
online_presence
The user's Facebook Chat status. Returns a string, one of active,
idle, offline, or error (when Facebook can't determine presence
information on the server side). The query does not return the user's
Facebook Chat status when that information is restricted for privacy
reasons
EDIT 2
May be you need a loop all your friends and for each of them execute the query
SELECT online_presence FROM user WHERE username = the_friend_from_list
This is a pseudocode but I'm sure you can handle it. :)