baseadapter

android学习笔记之ListView 和Adapter适配器BaseAdapter,simpleAdapter、adrrayAdapter

孤街醉人 提交于 2019-11-28 00:26:42
1、在学习Listview时候用到了Adapter适配器,定义MyAdapter时候需要继承ListAdapter接口,接口里很多方法没有实现,为了方便google工程师实现了个BaseAdapter类,我们在使用的时候可以继承这个抽象类,因此我们只需要完成几个抽象方法就可以了。 public class Db_adapter extends BaseAdapter { private Context context; private List<Person> personlist; public Db_adapter(Context context,List<Person> personlist) { this.context=context; this.personlist=personlist; } public void setPersonlist(List<Person> personlist) { this.personlist=personlist; } @Override public int getCount() { // TODO Auto-generated method stub return personlist.size(); } @Override public Object getItem(int position) { // TODO Auto

Skipped 60 frames! The application may be doing too much work on its main thread

空扰寡人 提交于 2019-11-27 18:23:33
I'm working on a App that should get a JSON response from a webservice and write every element in a listview , I have read that I should work with AsyncTask to get the HTTP Response and I did it and I could retrieve data from the webservice and display them in TextViews . But when I try to display elements in a listview it doesn't display anything and gives me the following message in the logcat : 06-05 19:44:27.418: I/Choreographer(20731): Skipped 60 frames! The application may be doing too much work on its main thread. here's my main code : public class MainActivity extends Activity {

Prevent the adapter from recycling views on scroll ( Edit do not ever do this.)

房东的猫 提交于 2019-11-27 16:45:31
问题 I have a custom base adapter that will take in an arraylist of data. From here it will fill out a grid view with custom buttons. It does so perfectly and fills up the gridview. The problem is. I want to set a button to change colors on change. When I do this, since the view is recycled, it also changes the next view that is recycled. Ex. Click on button one at position 0. Also changes button at position 13. Now when I do some debugging, I find that it also changes some of the properties. I am

i have android app that retrieve data from sqlite and display the data in BaseAdapter .. what is the best way ??

一个人想着一个人 提交于 2019-11-27 16:29:55
i have an android application that retrieve data from sqlite database and display these data in a listView that extend a BaseAdapter. in this app i have images in the drawable folder and i have in the sqlite a field that contain name of these images. my question is how to retrieve these data and display it in a listView ?? i read this tutorial :( http://www.androidhub4you.com/2012/09/hello-friends-today-i-am-going-to-share.html ). my question is there any other way to do this ?? i will appreciate any help . row_list_match_schedulle.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout

List item repeating in android customized listview

≯℡__Kan透↙ 提交于 2019-11-27 14:31:05
In my customized list view items are repeating.position of item is same for all item. code is below ListAdapter.java- public class ListAdapter extends BaseAdapter{ private List<String> mName; private List<Drawable> mIcon; private Context mContext; public ListAdapter(Context mContext, List<String> Name, List<Drawable> Icon) { this.mContext=mContext; this.mName=Name; this.mIcon=Icon; } @Override public int getCount() { // TODO Auto-generated method stub return mName.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return position; } @Override public

Android, List Adapter returns wrong position in getView

独自空忆成欢 提交于 2019-11-27 12:06:40
I have found a mysterious problem that may be a bug! I have a list in my fragment. Each row has a button. List shouldn't respond to click however buttons are clickable. In order to get which button has clicked I have created a listener and implement it in my fragment. This is the code of my adapter. public class AddFriendsAdapter extends BaseAdapter { public interface OnAddFriendsListener { public void OnAddUserClicked(MutualFriends user); } private final String TAG = "*** AddFriendsAdapter ***"; private Context context; private OnAddFriendsListener listener; private LayoutInflater myInflater;

Onscroll selected checkbox getting unchecked using listiview

时光总嘲笑我的痴心妄想 提交于 2019-11-27 09:53:11
In my application i added checkbox with ListView ,and i also gave limitation for checkbox ,user can not select more than 5 checkbox ,but the issue is on scroll my selected checkbox get unchecked following is my snippet code,can any one help me with this public class CustomAdapter extends BaseAdapter { private LayoutInflater inflater = null; Context context; String rup = "\u20B9"; private ArrayList<ModelPooja> listData; boolean checked[]; public CustomAdapterPooja(Context mainActivity, ArrayList<ModelPooja> listData) { // TODO Auto-generated constructor stub context = mainActivity; this

BaseAdapter class wont setAdapter inside Asynctask - Android

a 夏天 提交于 2019-11-27 09:51:28
I have asynctask that gathers usernames, comments, and numbers. It places them into strings and is then suppose to call a BaseAdapter class, create an adapter, and set the adapter to the class. But my code doesn't work, it crashes the app, here is my code public class DashboardActivity extends ListActivity { String comments[]; String usernames[]; String numbers[]; ListView lstComments; class CreateCommentLists extends BaseAdapter{ Context ctx_invitation; String[] listComments; String[] listNumbers; String[] listUsernames; public CreateCommentLists(String[] comments, String[] usernames, String[

Create a Generic Base Adapter?

眉间皱痕 提交于 2019-11-27 08:57:11
I am interested in creating a generic BaseAdapter which will apply to any ListView having any list_item . And it will set the item_row for the list_view. public class GenericAdapter extends BaseAdapter { Context context; ArrayList<HashMap<String, String>> list; LayoutInflater inflater; public GenericAdapter (Context context, ArrayList<HashMap<String, String>> list) { this.context = context; this.list = list; inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); } @Override public int getCount() { return list.size(); } @Override public Object getItem(int

Android call notifyDataSetChanged from AsyncTask

我与影子孤独终老i 提交于 2019-11-27 07:40:53
问题 I've a custom ListAdapter that fetches data from internet in an AsyncTask. The data is added perfectly to the list, but when I try to do operations the application crashes... I'm sure this is because I'm calling notifyDataSetChanged(); at the wrong time (i.e. before the AsyncTask ends). What I've got now: public class MyListAdapter extends BaseAdapter { private ArrayList<String> mStrings = new ArrayList<String>(); public MyListAdapter() { new RetreiveStringsTask().execute(internet_url); /