Hi I am using expandable list view in my layout which contain list of fitness activities i have done on that particular day. I can see all the list of activities when i initially open my Activity. But when i add new activities, i can not see new activities in my expandable list view. How can i see my new activities when i come back from other screens? Please suggest me some solutions.
Thanks in advance.
One easy way is that after adding activity, bind the adapter again with your listview. Make sure whatever array, you bind with list view using adapter, gets updated after you add activity.
Related
I need to create a listview that looks like Stack of list items .
The list should be similar to the one that we see in the Notification Bar or else it should be like most recent Apps in Android L.
Can anyone help me with idea of how to implement such type of list or some sample code fragment.
Use Base Adapter . You can define the element of list anyway you want.
Try using ListView for the UI development and implement the suitable adapter for it.
You need to have three things:
Source of data which you want to display your list view.
Fragment/UI [List View] for displaying the data.
An adapter which binds data to list view.
Check for detailed answer without fragment
Tutorial with fragment and list view
I searched allover but couldn't find any clear answer. I have a ListView declared in A customView and I would like to open another ListView when clicking on an Item.
I managed to do that by changing the adapter each time I click on an item on the Main ListView and show a pseudo new ListView. However this is not a stable solution.
I would like to know how can I instantiate a new listView without using intents or without having to change the adapter each time I want a new list output. I would want to create an entirely new ListView without direct connection to the initial one.
Can you try using ListFragment with FrameLayout in layout file? and just switch fragment when click on list item
I found the solution. I created in the CustomView several LinearLayouts for each listview one root layout. I have also created an individual class for each listView and used the same CustomAdapter and ViewHolder throughout. What I additionally used were interfaces that I declared in each List View class, with a method that tracks the row number. Based on this I implemented all the interfaces in the CustomView and listened to the clicked rows. At last, I then created animation methods and played with the visibilities.
By the way, instead of setting the List views to INVISIBLE i set them to GONE, hence there are quite manny the GPU doesn't need to recalculate the layout bounds.
Hope that helps cheers.
The method that i Place in the customView init() looks like this:
The interface listener must be implemented on "this" context of the CustomView, otherwise NUllPointerException hence the ListView doesn't know where to listen too.
** Current Situation: **
One Activity, with one ListView, that changes its contents based on resetting the adapter between three different adapters. There is just one ListView with id : list. Thats it. When I reset adapter it adjusts the content of the list view.
What I want to do:
Use ViewPager to page between the different list instantiations.
Problem: View pager seems to be setup to take separate layouts, but I have written all my logic against a single list. It would be a big rewrite to use three different ListViews pointing to differnt list.
Question: How do I use the ViewPager to switch between views of the same list that are generated by different adapters being applied to the list?
Just use the same fragment for every page. Set a single variable in the intent that tells the fragment which adapter should be used. Technically it's not the same listview, although it is the same code (which is what usually matters I think).
I don't think it's possible for it to technically be the same listview considering the swiping animation.
I would like to design an item like this that opens a subset of other items when clicked, I have only seen it in other applications I've used, and I can't find any resources on how to create it. Does anyone know how to?
Thanks.
Its not clear if you want to created Nested listviews that look like this
-Item1
-Item2
---Item2A
---Item2B
-Item3
or if you want to open a completely new list when the user clicks on an item.
If you want to use a nested listview look at this question: android nested listview
And if you want to open a new activity, then create a 2nd activity with a listview and open that on an item click
Perhaps you should try to have a look at the ExpandableListView.
Documentation is available from here:
http://developer.android.com/reference/android/widget/ExpandableListView.html
If you wanted to add a ListView that opens another list, you can do it in several ways. I've successfully done it by adding an OnItemClickListener to the ListView and then simply load a new set of data in the ListView and update it using invalidate() or by setting a new Adapter.
You could even add some cool transitions or animations, and create a listener for when the animation is completed. Lots of cool ideas :-)
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.