android-adapter

Closed. This question is off-topic . It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . I've just started out coding for Android but am struggling to get my head around listviews. For example I need to understand how I can show another listview when clicking on an item in the first listview. Also how I can display a textview when clicking on an item in a listview. If anyone knows of any good tutorials or examples please let me know. Thanks a lot trgraglia Here are some links for you are looking for

In one of my past projects I implemented a "Time Picker Carousel". It is based on a HorizontalScrollView . The user can pick a time while scrolling this view. The time value is calculated from the X-Offset of the HorizontalScrollView . I wanted to share this project at github, but while cleaning up the code I realized some bad performance issue. The HorizontalScrollView is populated with a custom ArrayAdapter . The getView() uses a Holder for the convertView . I thought it might work as an adapter within a ListView , so only the visible items are rendered and reused if they will be destroyed.

I've a custom adapter implemented for my ListView . How do I extract objects from a particular list item. Here's how my custom adapter looks: MyCustomAdapter.java public class MyCustomAdapter extends ArrayAdapter<DashboardBean> { Context context; int layoutResourceId; DashboardBean currentMRB; Vector<DashboardBean> data; public MyCustomAdapter(Context context, int layoutResourceId, Vector<DashboardBean> data) { super(context,layoutResourceId,data); this.layoutResourceId = layoutResourceId; this.context=context; this.data = data; } @Override public View getView(int position, View convertView,

I have a RecyclerView that can show items as list, small grids or large grid and this can be change at runtime. Depending on what style user chooses i inflate different layout in onCreateViewHolder . I also use layoutManger.setSpanSizeLookUp() to switch between styles. My code looks like this layoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() { @Override public int getSpanSize(int position) { if(showType == ProductAdapter.SHOW_TYPE_SMALL_GRID) return 1; else return columnCount; //show one item per row } }); @Override public void onClick(View v) { if(showType ==

If I have a ListView with a CustomAdapter and let's say I have this refresh() method that refreshes the list with new results, should I: Call new CustomAdapter(...) upon initialization, and every time I call refresh() , I use adapter.clear() and adapter.add(...) Call new CustomAdapter(...) every time I call refresh() Basically, I'm asking, is it better to recreate an adapter everytime I load new results or is it better to clear the results in existing adapter and add the entire list to it? It is definitely better to call notifyDataSetChanged() on the original adapter than setting a new one.

I am using a base adapter to set data in a listview dynamically. I tried to set listview height dynamically. It works perfectly if the textview inside it is single line. However if the textview is multiline, the height is not set properly. The height is set considering single line textview only. How can I set correctly set the height of listview items containing multiline textview. Here's the code: Fragment code: ListView mlistNews=(ListView)rootView.findViewById(R.id.news_listView); mlistNews.setAdapter(new NewsAdapter(getActivity(),params_news)); Utils.setListViewHeightBasedOnItems(mlistNews