Develop Reference

Variable number of image buttons

basically what am doing is am querying some data from firebase and inside these data is a URL for an image of a specific item. Now since its a query i could get different result form the firebase where i can get 4 images or sometime maybe 1 image.
And i want to display the images in a grid layout ( similar to that of Instagram posts) where the user can click on an image and it shows the user some details about that item. This is the part where am stuck at.. i dont know how to do it since i have a variable number of images.
if there is a way, please help

you can use the Recyclerview and provide the model with those details. It will automatically create those many rows in list.
Here you can follow this to do this.

Set images randomly in the grid in Android

I am using a version of the "Grid View" example from the Android Developers site: http://developer.android.com/resources/tutorials/views/hello-gridview.html And I would like to display images in reach grid randomly and the image position will change in each click. Can someone please give an example of how this might be accomplished (i.e. what needs to be edited)? Thanks!

You need to implement a custom ListAdapter, where you need to check which items are visible and select then a random image which is not visible. Bute note that a total random list will confuse your users. Better sort your images by random and visualizate them same in one instance.

displaying data in ListView programmatically

I'm developing an Android App and I need to display some data in a scrollable Listview.
I will extract some strings from objects that I right now have stored in linked lists (until i come up with a better solution).
I want to display a view that looks almost like the contacts app. A list with a small picture to the left and a larger text to the right of the picture with a smaller text the bigger one. When I click on one of the items it should open a new activity.
How do I create the view? If I adds an object in the linked list it should appear in the list.
I have checked some sample code, but they all uses Arrayadapter and I dont understand how I am supposed to do.

Check this article about Adapters: http://www.vogella.com/articles/AndroidListView/article.html
If you want to add new objects in ListVew use:
adapter.notifyDataSetChenged();

Check the libraries in this question, you have what you need there:
Lazy load of images in ListView

how to split list view in an activity

I have a requirement that I need to display as many elements as possible in listview.
I have some 50 elements in my listview , so to display many elemnts I decided to split the listview in two parts , means half of my activity screen will display some elements and second half will display some more elements....
Please help if its possible to draw the listview in two parts, if not please let me know if ther's any aletrnative.. The data in a listview is dynamic..
I am using Android version3.2..

So it sounds like you need to implement multiple listviews within a single activity. This stackoverflow post is probably what you're looking for.

Large ListView in Android

Building a dictionary application I need a ListView that shows over 100k items. I want to let the user scroll as much as needed.
What's the best practice for searching and showing words?
Is it ok to show 150,000 words in the ListView (for pereformance)?
If not how to add 100 other words after the user reaches to the end of the list?
Currently I show 50 words previous and 50 words next of searched word.
Thank you.

(second answer in response to clarification about performance)
There are different ways to do this based on where your data is.
The best way is to have your data in a sqlite database and use a CursorAdapter. Android then manages the fetching of your data and won't fetch data that isn't currently being shown on the screen.
If your words are in an array in memory, try ArrayAdapter or SimpleAdapter.
The Adapter interface, from which all of the above classes inherit, is designed to provide good ListView performance regardless of the number of objects in the list.

One built-in way to allow fast scrolling is via the fast scroll thumb. In your xml, set:
android:fastScrollEnabled="true"
on your ListView, or try:
listView.setFastScrollEnabled(true)
listView.setFastScrollAlwaysVisible(true)

RecyclerView is very good for this. I have developed an open source library especially designed to scroll through large list with extreme speed. In fact it can move well in excess of 1000 items per second both in single and multiple column layouts You can check out the repo here: https://bitbucket.org/warwick/hgfastlist or you can checkout the OpenGL version here: https://bitbucket.org/warwick/hgglfastlist. Here is a demo video on Youtube: https://www.youtube.com/watch?v=oz7aeAlOHBA&feature=youtu.be
Even if you don't want to use this library, there's loads of code to read through in the demo app that will give you good ideas.