How can I organize a spinner alphabetically that has its fields in a listView without manually changing the field data?
I'm not sure I totally understand the question, but here goes.
You can populate the spinner in a similar way that you populate the ListView. That is by using an Adapter. When you create the adapter that you're using for the ListView, make one that you'll use for the spinner.
The type of adapter you use will be based on where the information you're using is coming from.
Does this help?
Related
I have made an application by usign Parse.com. I retrieve data to listview and spinner with Parse Query Adapter. Everything is cool till here. The problem occured when I try to use a custom layout for listview and spinner. I made the layouts but I couldnt find how to assign that layout to Parse Query Adapter. Another issue is I couldnt find a way to filter Parse Query Adapter for search feature. Is there any solution for these or any other ideas?
I also tried to retrieve all data with normal parse.com query to ArrayList and use regular ArrayAdapter but that also didnt work. I dont know why but I couldnt make spinner data select. It shows data as dropdown but none are selectable.
I have a ListView, the first 5 elements of which is to be populated by elements retrieved from an array defined in the strings.xml. These are static and will never change. The rest of the elements will be populated from the SQLite DB. These are dynamic and the user can remove from and add to these.
Is there a way I can implement a custom adapter where I can use a combination of ArrayAdapter and SimpleCursorAdapter.
I tried searching online for such a combination, but could not find anything that could help. Any help is appreciated.
i want to display an expandable list view in android that contains constant strings defined in a XML file in the resources
my app should support multiple languages so its the cleanest way to keep all strings together
i know its possible in normal listView where i can use the property
android:entries="#array/stringarray"
but when i use it with expandable list it gives me an exception that i should use expandable list adapter instead of list adapter
even know that i am not using any adapters "i think its implicit"
so obliviously "entries" is usable with expandable lists but cant find a way to make it work
any suggestions are welcome
Well I think the easiest solution is to create an Expandable list adapter object and bind it to the expandable list object. When you add all the members of string array to the adapter elements, the expandable list will be modified accordingly.
Look at the SimpleExpandableListAdapter constructors to find out how to implement the idea mentioned above.
Can anyone tell me what exactly does an array adapter do? I've tried searching the net but all I get is code examples. Please explain me what it does, I've visited the android developers as well.
An ArrayAdapter can be used as a data source for a number of different Android Views, such as a ListView or a Spinner.
Basically, you pass some kind of array or list to the constructor of an ArrayAdapter. Then, the adapter can be hooked up to a ListView by calling setAdapter(). You can also use the add and remove methods of the adapter to modify the underlying list itself.
You can also use an ArrayAdapter to customize the appearance of items in a ListView for example (or other Views) by using the constructor and passing in the resource of a layout to use, or by overriding the getView() method and building it yourself.
Typically, an adapter is some kind of translator. It's the "man in the middle" who know how to dialog with both sides and convert what is said.
An arrayAdapter is a class which get datas from an array and format it for a listview or spinner to understand it. When a listview need the data 4, for example, it will ask the adapter who will return him the 4 element of the array.
Ok, the listview could directly use the array.But with the adapter you're allowed to use any kind of data source. An ArrayAdapter(subclass of adapter) uses an Array, but another adapter could use a database or a file or anything else.That way the listview is able to get datas directly from any source without knowing how to access it.That is the adapter's role.
Can I use my existing ListView as a sub-view in another view.
eg. I have a custom view, players list, I have implemented with a ListActivity and ArrayAdapter and is working fine.
Now I want a way to get this listview as View object so that I can add this view object as a child to another view.
I am thinking like, to build entire listview: my ListActivity is calling the ArrayAdapter iteratively by passing ArrayList item each time to build a list item view.
If I am correct, I need a way to call the same ArrayAdapter and need to prepare a ListView Object, right?
Can anybody plz help me.
Thanks in advance.
vpapana
The ListView and the Adapter are two different things:
The data is somewhere (in an array or if you need to be able to add/remove items, in an ArrayList)
The Adapter contains the data
The ListView displays it.
So:
Construct your empty ArrayList
Construct your adapter based on your ArrayList
Construct your ListView based on the Adapter
Then:
Each time you need to change the data, update the ArrayList
Call Adapter.notifyDataSetChanged()
Watch your list being automatically updated :)
To add your list to a tablelayout, see the API documentation, SDK tutorial and this tutorial which has a specific section on how to add rows programmatically.