android-adapter

Custom adapter getview is not called

由 我的梦境 提交于 2019-11-27 02:50:53
问题 I have a Custom adapter with a ListFragment but the adapters getView() is not getting called at all. This is how the adapter looks like - public class ModuleListItemAdapter extends BaseAdapter { List<ModuleItem> list; Context context; Module mod; public ModuleListItemAdapter() { super(); // TODO Auto-generated constructor stub } public ModuleListItemAdapter(Context context, List<ModuleItem> list, Module mod) { super(); this.list = list; this.context = context; this.mod = mod; // TODO Auto

How to use Universal Image Loader

由 心不动则不痛 提交于 2019-11-27 02:43:58
问题 I have a requirement where I need to load thumbnails and a Text in ListView which gets set by the custom Adapter . The Thumbnails should be stored in a cache memory, for that I am using the Universal Image Loader however I am pretty much confused in the implementation of it and how to use it as per my requirement in to load the images in ListView from URL . Please suggest me some ways for it with good implementation. 回答1: Write below code line into your adapter's getView() method, here

Using Android AutoCompleteTextView with ArrayAdapter<Objects> instead of ArrayAdapter<Strings>

由 放肆的年华 提交于 2019-11-27 00:36:41
问题 I wanted to use AutoCompleteTextView in my android application.I know how to use it with simple array of Strings, but I wanted AutoCompleteTextView to use list of Objects to perform completion.My code for this is following: ACTIVITY CODE public void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.search); initialize(); ArrayAdapter<Student> adapter = new ArrayAdapter<Student>(this, R.layout.dropdown_list_item

How to display an ArrayList in a RecyclerView? [duplicate]

由 浪尽此生 提交于 2019-11-27 00:18:46
问题 This question already has an answer here: The simplest way to display Strings with icons in a RecyclerView 2 answers I need to add an Activity where I can list the elements of an ArrayList<CustomClass> and I've seen there's a newer and better way to display lists - RecyclerView . My question is how to implement this into my app. I've found that I need to use an Adapter , but I don't quite understand how to implement the whole process correctly. If you're wondering, I'm referring to this

Custom adapter for a list of items that have multiple child items?

由 瘦欲@ 提交于 2019-11-26 23:32:56
问题 How would i go about writing an adapter for this Layout. I started out wanting to making a list using linear and relative layout, so that each list item has child items align horizontally relative to each other. Here is the layout file and the screenshot of the view. I understand how to write simple list views and adapters. But just wondering how i can get to more complex lists with more than hand full of child list items. <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=

ListView not showing at all

由 安稳与你 提交于 2019-11-26 22:27:28
问题 I have setup a custom adapter, and inflating the data in a list view, problem is list view not showing up. In debugging mode the listView is showing that it indeed has an adapter attached to it, but I can't see any thing. Here is the code to initialize adapter. contactAdapter = new ContactAdapter(this, R.layout.contact_layout, contactList); master_listView.setAdapter(contactAdapter); Here the code for ContactAdapter itself public class ContactAdapter extends BaseAdapter { Contact contact;

Android: how to refresh ListView contents?

由 痞子三分冷 提交于 2019-11-26 21:45:09
My ListView is using an extension of BaseAdapter , I can not get it to refresh properly. When I refresh, it appears that the old data draws on top of the new data, until a scroll event happens. The old rows draw on top of the new rows, but the old rows disappear when I start scrolling. I have tried calling invalidateViews() , notifyDataSetChanged() , and notifyDataSetInvalidated() . My code looks something like: private void updateData() { List<DataItems> newList = getNewList(); MyAdapter adapter = new MyAdapter(getContext()); //my adapter holds an internal list of DataItems adapter.setList

What's the role of adapters in Android?

由 不问归期 提交于 2019-11-26 17:53:52
问题 I want to know when , where and how adapters are used in the context of Android. The information from Android's developer documentation was insufficient for me and I'd like to get a more detailed analysis. 回答1: Well adapters in Android are basically a bridge between the UI components and the data source that fill data into the UI Component For example, Lists (UI Component) get populated by using a list adapter, from a data source array. 回答2: Let’s assume you want to display a list in your

How to use adapter.notifyDataSetChanged(); where i have to use these line for my error

由 谁都会走 提交于 2019-11-26 17:52:41
问题 ItemListBaseAdapter.java public class ItemListBaseAdapter extends BaseAdapter { private static ArrayList<Recipedetails> itemDetailsrrayList; private Integer[] imgid = { R.drawable.vegeterian, R.drawable.nonveg, R.drawable.pickels, R.drawable.soup, R.drawable.sweets, R.drawable.cakes, R.drawable.icecreams, R.drawable.chinesevegdishes, R.drawable.chinesenonveg, R.drawable.chinesenoodles, R.drawable.chinesesoup, R.drawable.godhumaivegadai, R.drawable.soyamorekoozh, R.drawable.tomatokulambu, R

findViewById vs View Holder Pattern in ListView adapter

由 你离开我真会死。 提交于 2019-11-26 11:14:44
I always use LayoutInflater and findViewById for creating new item in the getView method of an Adapter . But in many articles people write that findViewById is very very slow and strongly recommend to use the View Holder Pattern. Can anyone explain why findViewById is so slow? And why the View Holder Pattern is faster? And what should I do if needed to add different items to a ListView ? Should I create classes for each type? static class ViewHolderItem1 { TextView textViewItem; } static class ViewHolderItem2 { Button btnViewItem; } static class ViewHolderItem3 { Button btnViewItem; ImageView
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