android-adapter

Summary: Trying to dynamically add heading rows to a ListView via a custom adapter wrapper. ListView is having trouble keeping the scroll position in sync. Runnable demo project provided. I would like to dynamically add items to a list based on the values in a CursorAdapter, several positions ahead of what the user is currently viewing. To do this, I have an adapter that wraps the CursorAdapter and keeps the new content indexed in a SparseArray. The ListView needs to be updated when items are added to the custom adapter, but I have met a lot of pitfalls trying to get that to work and would

This question already has an answer here: Android, ListView IllegalStateException: “The content of the adapter has changed but ListView did not receive a notification” 25 answers I found a lot of questions on the same topic. But I am unable to figure out what I am doing wrong here. Exception: "The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread" I have a TextWatcher to my AutoCompleteTextView. I am trying to update the dropdown list when the text changes.

I have a custom adapter which extends ArrayAdapter, it implements the view holder patterns to show data (text + image) from a web service. for lazy loading of the images I use the async tasks pattern from the advanced training in the Android's developers site, I also use disk + ram bitmap cache. when there is additional data to be retrieved I add a footer view that clicking on it retrieves additional data from the web service and add it to the adapter. the problem is that when this new data is being added, some of the visible images are changing and immediately changing back, which result in a

There are quite a few discussions around this topic ViewPager PagerAdapter not updating the View Update ViewPager dynamically? Removing fragments from FragmentStatePagerAdapter I have tried various solutions (including the invalidation with POSITION_NONE ) . But I still donT know how to remove an item properly. What happens is either I get a blank page (meaning the fragment is destroyed, but the instantiateItem was not called for a replacement) or the whole thing crashes probably because the way the Android manages the fragment instances do not match how I keep them in my arraylist/sparsearray

Am I using this viewholder wrong? I'm getting an NPE on line 165. Is there an obvious reason why that I'm missing? Do I need a group viewholder and a child viewholder if I'm using expandablelistview? I marked line 165 to try to make it easier on the eyes. Thanks a lot my expandablelistview that's getting the NPE: public class MyExpandableListAdapter extends BaseExpandableListAdapter { private Context mContext; private ArrayList<ContactNameItems> mListDataHeader; private ArrayList<Boolean> phoneNumberCheckStates; private ArrayList<String> selectedNumbers; private HashMap<String, List

I'm doing some test after change device configuration (change language, orientation, etc), and i notice that after this, the method "notifyDataSetChanged()" is not working. The action example: I'm calling updateList() everytime i do an action like delete, save, etc. The user click a delete button, a DialogFragment is shown, "Are you sure you want to delete?", when i change the orientation, or the language, or any configuration of the device and then click "yes" on the Dialog, the data is removed, but the list doesn't update. I need to quit the activity, then go back to see the alteration.