Develop Reference

Android: Recyclerview adapter inside recyclerview adapter. How to update data of inside recylcerview?

I got a recylcerview, which has another recylcerview as an element of it. However, i am confused how to update data of the inside recylcerview. How should I do it?

I don't know if this will work for you because i don't have your code, but you can create a updateAdapter , inside of it you must refresh everything.
For example we have 2 arrayList:
private void updateAdapter() {
this.mItems = c.getArray();
this.mItemsNr = c.getNr();
//and call notifyDataSetChanged
notifyDataSetChanged();
}
mItems and MItemsNr are 2 arrayList and c is an object where i have the 2 new arrayList.So i update the 2 arrayList and hten i call notifyDataSetChenged(); to update my adapter.
Hope this could help you.

Continuing to put data on Listview

Is there anyway to continuously load data on one list view? I tried doing this but the second setadapter overrides the first one. Here is my code:
ArrayAdapter<Display> adapter = new DisplayAdapter(getActivity(), R.layout.display_list_item, response.container.InactiveDisplay);
existingItemsListView.setAdapter(adapter);
ArrayAdapter<Display> adapter1 = new DisplayAdapter(getActivity(), R.layout.display_list_item, response.container.ActiveDisplay);
existingItemsListView.setAdapter(adapter1);

An alternative solution:
List<MyAdapterItems> myItems =
((MyAdapter)myListView.getAdapter()).getMyAdapterItems;
/*
*You can use myitems.add(Object o) method to add items then you can call
*/
myListView.setAdapter(myItems);

add data to first adapters array and then call adapter.notifyDatasetChanged(); to notify listview that there is new data to load

Adding data at the specific position of Listview in android

I have a listview and I have to add two more element in listview. I have to add notifyDataSetChanged() . but not sure how to do it.
listView = (ListView) findViewById(R.id.my_listview);
myListAdapter = new MyListAdapter (this, sourceList);
listView.setAdapter(myListAdapter);
myListAdapter.notifyDataSetChanged();
sourceList is the List .
I need to add 2 items at the end of the Listview. Thanks.

Just add your desired data to the adapter. For example:
myListAdapter.add(obj1);
The newly added data will be attached at the end of your ListView.
Remember: when injecting data directly into an Adapter, you don't need to call its notifyDataSetChanged method.
If you modify your sourceList object, in that case its necessary to call notifyDataSetChanged method in order for the Adapter to refresh its contents.

Check out this Dummy Example to add the adapter to the List.
Read the Comment
ListView lstViewtodo; //Your ListView
List<NoteModel> list_note_model = new ArrayList<NoteModel>(); // for Adding the Array of your Model
NoteModel noteModel = new NoteModel(txttitle, jsonArray, obj.getUid(), txtColorType, false); //Your Model
list_note_model.add(0, noteModel); //Adding the value to array
lstViewtodo.setAdapter(list); //finally adding the content to list
To Add the Content Dynamically...
NoteListAdapter list = new NoteListAdapter( NoteMainActivity.this , R.layout.todo_adapter_view , list_note_model); //Your class extending the ArrayAdapter<NoteModel>
NoteModel noteModel = new NoteModel(txttitle, jsonArray, obj.getUid(), txtColorType, false);'
list_note_model.add(0, noteModel);
list.notifyDataSetChanged();
Let me Know if You Difficulty...

How to add more item in a list view without refreshing the previous item

I have a listview in which i am adding some data after fixed interval.but I don't want to set the adapter again as it will refresh the complete list.Is there any method to add item without refreshing the complete list.
Thanks in advance.

You probably want to use the following (in RecycleView not ListView):
notifyItemInserted(0);//NOT notifyDataChanged()
recyclerViewSource.scrollToPosition(0);
//Scroll up, to use this you'll need an instance of the adapter's RecycleView

You can call adapter.notifyDataSetChanged() to just update the list.
Adapter's getView() is called at different times and there is no particular pattern. So your views are updated whenever ListView wants it to be updated.
But as far as I see it, you are looking for adapter.notifyDataSetChanged. The workflow should be something like this.
Set adapter to ListView
Add data to adapter`
Call notifyDataSetChanged() on adapter.
It will at least prevent your list to bounce back to first item on the list.
Hope that helps.

you can use this .notifyDataSetChanged()
However notifyDataSetChanged() only works For an ArrayAdapter,if you use the add, insert, remove, and clear functions on the Adapter.

You can use
adapter.add(<new data item>); // to add data to your adapter
adapter.notifyDatasetChanged(); // to refresh
For eg.
ArrayAdapter<String> adapter;
public void onCreate() {
....
....
ArryList<String> data = new ArrayList<String>();
for(int i=0; i<10; i++) {
data.add("Item " + (i+1));
}
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, data);
setListAdapter(adapter);
}
Now whenever you have new data to be added to list you can do following
private void appendToList(ArrayList<String> newData) {
for(String data : newData)
adapter.add(data);
adapter.notifyDatasetChanged();
}

How to refresh ListView in Android

I know you can call notifyDataSetChanged(); How would you do that in this context -- is it even possible?
ListView listView = getListView();
listView.setTextFilterEnabled(true);
setListAdapter(new ArrayAdapter<String>(Items.this, R.layout.list, items));
Edit: I have changed to one of the suggestions below. Here is what I am doing:
protected void onPostExecute(Void v) {
adapter = new ArrayAdapter<String>(Items.this, R.layout.list, items);
setListAdapter(adapter);
adapter.notifyDataSetChanged();
}
Here I am refreshing inside an AsyncTask method. This is being called inside a Dialog with a Submit button on top of a ListLiew. The Dialog inserts new data into a database and I want the list refreshed where to reflect this. I have tried this code above AND inside the onClick for the Button in the Dialog. Right before dialog dismissed.

You need to initialize the ArrayAdapter by itself:
ArrayAdapter<String> adapter = new ArrayAdapter<String>(Items.this, R.layout.list, items);
setListAdapter(adapter);
...then call notifyDataSetChanged() on that:
adapter.notifyDataSetChanged();
Note that you only need to call this method if the data actually changes; given this, you probably need to have it stored as a member variable in the class so it can be accessed later.

You should just be able to call notifyDataSetChanged() on your ArrayAdapter, since ArrayAdapter extends BaseAdapter
http://developer.android.com/reference/android/widget/ArrayAdapter.html
In your example you'd do something like this, taking that you meant to call listView.setListAdapter()
(ArrayAdapter)listView.getAdapter()).notifyDataSetChanged();

In your example, you shouldn't be setting the adapter in your AsyncTask. Generally it is a good idea to do that in onCreate() because otherwise you are setting it each time AsyncTask is called. If you make your adapter a member variable, then you should be able to call <adapter>.notifyDataSetChanged() from within the AsyncTask.