baseadapter

What's the difference between BaseAdapter and ArrayAdapter?

匿名 (未验证) 提交于 2019-12-03 01:54:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I want to know the difference between using BaseAdapter and ArrayAdapter . I have been achieving what I want through ArrayAdapters . Does it affect the performance of the ListView on the adapter interface in which it is implemented ? And, the last question is, can i achieve anything doing with ListView using any of these Adapters , or, there are certain cases where specific adapter only can be used? 回答1: Here is the difference: BaseAdapter is a very generic adapter that allows you to do pretty much whatever you want. However, you have to do

extends BaseAdapter appear NullPointerException

匿名 (未验证) 提交于 2019-12-03 01:44:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: i am public class MyHomePageAdapter extends BaseAdapter and some code is: public static class ViewHolder{ public GridView myfriendsGridView; public Button myfriendsPre,myfriendsNext; public ListView listview; public Button searchBu; public Button footerBu; public EditText editText; public ListView myfans_listview; public Button myfans_searchBu; public EditText myfans_editText; } @Override public View getView(int position, View convertView, ViewGroup parent) { int view = getItemViewType(position); if(view==1) { if (convertView == null) {

no change/black screen by notifyDataSetChanged();

放肆的年华 提交于 2019-12-02 18:22:36
问题 I want to do something like this. while pressing the refresh button, it will refresh the list. Activity codes are like this: adapter = new TweetAdapter(Welcome.this, tweets, users); tweetsList.setAdapter(adapter); private void refreshAdapter() { adapter.clear(); adapter.refresh(tweets, users); } refreshAdapter() called when I need to change the list item. here tweets & users are ArrayList & HashMap items and the adapter part is like this: public void clear() { this.tweets.clear(); this.users

Filtering custom adapter returning incorrect results

拥有回忆 提交于 2019-12-02 15:41:06
问题 Check: I am trying to implement filter on my ListView . But I am facing a very strange kind of problem. If I type letter T in the EditText the ListView is getting filled with names starting from B , J . Please help. public class MyCustomAdapter extends BaseAdapter implements Filterable { Context mContext; private LayoutInflater mInflater; SparseBooleanArray mSparseBooleanArray; private ArrayList<Map<String,String>> mAdapData = new ArrayList<Map<String, String>>(); private ArrayList<Map<String

BaseAdapter and Picasso issue

有些话、适合烂在心里 提交于 2019-12-02 14:01:00
问题 I am having a problem loading images in ListView from a server with Picasso. I have a BaseAdapter that is used to fill my ListView. In this ListView some items have an image and some not. in this method: public View getView(final int position, View convertView, ViewGroup parent) { I do: ... //context = Activity context; //context1 = Context context1; context1 = context.getApplicationContext(); if (!photo[position].equals("")) { String stringurl = "http://www.blablabla.it/img/"+photo[position]

no change/black screen by notifyDataSetChanged();

天大地大妈咪最大 提交于 2019-12-02 11:58:50
I want to do something like this. while pressing the refresh button, it will refresh the list. Activity codes are like this: adapter = new TweetAdapter(Welcome.this, tweets, users); tweetsList.setAdapter(adapter); private void refreshAdapter() { adapter.clear(); adapter.refresh(tweets, users); } refreshAdapter() called when I need to change the list item. here tweets & users are ArrayList & HashMap items and the adapter part is like this: public void clear() { this.tweets.clear(); this.users.clear(); } public void refresh(ArrayList<Tweet> tweets, HashMap<String, User> users) { this.tweets

TextView value changes back to previous value after scroll in base adapter

北慕城南 提交于 2019-12-02 10:10:22
问题 I've been researching this forever and can't find a solution. Everything about my custom list view seems to perform correctly. When I click on the holder.feedUpVoteButton , the text changes +=1 correctly. However, when I scroll down and scroll back up, the text value is reverted to the value it had before it was clicked. I refuse to use notifyDatasetChanged because I am not adding anything or removing anything from the list. public class CustomFeedListViewAdapter extends BaseAdapter{

how to make textview of the listview clickable

回眸只為那壹抹淺笑 提交于 2019-12-02 10:06:53
问题 I have a customized listview contains of some Textviews . I set the list view to the adapter as follows: BestandTypAdapter bestandTypAdapter = new BestandTypAdapter(getActivity(), R.layout.bestand_type_liste, dataList); li.setAdapter(bestandTypAdapter); and as shown below in the code of the bestand_type_liste layout the TextView is clickable bestand_type_liste : <?xml version="1.0" encoding="utf-8"?> <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width=

Can not reload ListView Content after implementing Filterable interface on my CustomListAdapter

只谈情不闲聊 提交于 2019-12-02 10:05:14
I have two questions here. The First Question goes :: After i implementing Filterable interface in my CustomListAdapter to enable search on list data, i realized that each time i try to reload the listview, it refused to populate the listview even thought i was able to fetch the data from my server. (My ListView always reloads on device orientation change and i also added a reload button to reload the listView onclick too) The Second Question goes :: My search EditView populates my listView very well onchange but i realized that when i empty the EditView, the previous data in the ListView does

Loading different images in the listview item for custom Adapter

大兔子大兔子 提交于 2019-12-02 08:07:29
Hi please forgive me if I am mistaking when explaining the problem . I have a Custom Base adapter in which there is two imageView and two TextView and I am usning an Async task to set the image from the URL. it sets the image but changes the image again automatically. below is the code for the adapter . public class SharedPhotosAdapter extends BaseAdapter{ Context context; LayoutInflater inflater; public static ArrayList<HashMap<String, String>> data; ImageLoader imageLoader; private static final String BRANCH="Branch"; private static final String DATE="DateTime"; private static final String