I know questions like this one was already asked but I went through all the solutions I saw and non has worked.
This is my adapter
class Adapter extends BaseAdapter {
Activity context;
public Adapter(Activity context) {
this.context = context;
}
#Override
public int getCount() {
return Constants.CHARACTERS_NAMES.length;
}
#Override
public Object getItem(int i) {
return null;
}
#Override
public long getItemId(int i) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = context.getLayoutInflater().inflate(R.layout.list_charecter_item, null);
holder = new ViewHolder();
holder.PlayerName = (TextView) convertView.findViewById(R.id.name);
holder.PlayerName.setText(Constants.CHARACTERS_NAMES[position]);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
return convertView;
}
private class ViewHolder {
TextView PlayerName;
}
}
This is a standard adapter but when I debug it with my listview Instead of getting All my 7 items which are in Constants.CHARACTERS_NAMES I get the 4 first items right, but the I get the first item twice and then the second item.
Please help.
Related
I am using a custom BaseAdapter to create a custom list. What I'm trying to do is have a public function outside of getView(), in this example setName(), that can interact with a view of a specific item on the list.
For example calling setName(1); should make invisible the TextView of the second item on the list.
Thank you in advance.
public class ListAdapterNew extends BaseAdapter {
private int size;
private Context context;
private ViewHolder viewHolder;
String[][] data;
ArrayList<DataModel> listArray;
public ListAdapterNew(Context context, String[][] data, int size) {
listArray = new ArrayList<DataModel>(size);
for(int i=0;i<size;i++){
listArray.add(new DataModel(i));
}
this.context=context;
this.data=data;
this.size=size;
}
#Override
public int getCount() {
return listArray.size();
}
#Override
public Object getItem(int i) {
return listArray.get(i);
}
#Override
public long getItemId(int i) {
return i;
}
public int getViewTypeCount() { return getCount(); }
#Override
public int getItemViewType(int position) {
return position;
}
private static class ViewHolder
{
TextView number,name;
}
#Override
public View getView(int index, View view, final ViewGroup parent) {
if (view == null) {
LayoutInflater li = (LayoutInflater) parent.getContext().getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
view = li.inflate(R.layout.main_user_list_item, parent, false);
viewHolder = new ViewHolder();
viewHolder.number = view.findViewById(R.id.main_list_number);
viewHolder.name = view.findViewById(R.id.main_list_name);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
viewHolder.number.setText((index+1)+")");
viewHolder.name.setText(data[index][0]);
}
view.setClickable(true);
view.setFocusable(true);
return view;
}
public void setName(int index){
viewHolder.name.setVisibility(View.GONE);
}
}
The answer was simple. I use a public function inside the ListAdapterNew to update the data[][] and call notifyDataSetChanged(); on the adapter.
There is also a small change in the getView() of the adapter that allows the view to update when items become visible, as shown below.
if (view == null) {
LayoutInflater li = (LayoutInflater) parent.getContext().getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
view = li.inflate(R.layout.main_user_list_item, parent, false);
viewHolder = new ViewHolder();
viewHolder.number = view.findViewById(R.id.main_list_number);
viewHolder.name = view.findViewById(R.id.main_list_name);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
if (view != null){
viewHolder.number.setText((index+1)+")");
viewHolder.name.setText(data[index][0]);
}
Function that updates the data
public void updateIcons(int index, int data){
this.icons[index]=data;
}
I have ListView with check boxes the app delete the checked items ;; and should delet teh items that have the same id with the checked items :
here's my code
private class CAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private ArrayList<Entity> list;
private Context context;
String Status;
CAdapter(Context context,
ArrayList<Entity> getC) {
this.context = context;
this.list = getC;
Status="";
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
class ViewHolder {
TextView Name;
TextView Desc;
Button deleteBtn;
CheckBox CBox;
}
public int getCount() {
return list.size();
}
public Object getItem(int position) {
return list.get(position);
}
public long getItemId(int position) {
return position;
}
#SuppressLint("NewApi")
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
final CEntity CObj = list.get(position);
if (convertView == null) {
convertView = mInflater.inflate(
R.layout.custom_list_view_confirmed, parent,
false);
holder = new ViewHolder();
holder.Name = (TextView) convertView
.findViewById(R.id.Name);
holder.Desc = (TextView) convertView
.findViewById(R.id.activity1);
holder.deleteBtn = (Button) convertView
.findViewById(R.id.deleteBtn);
holder.CBox=(CheckBox) convertView.findViewById(R.id.isCheck);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
if (CObj.getMystatus().equals(
context.getResources().getString(R.string.course_status_delete))) {
holder.status.setTextColor(Color.RED);
} else if (attemptedCourseObj.getMystatus().equals(
context.getResources().getString(R.string.course_status_pending))) {
holder.status.setTextColor(Color.GREEN);
} else if (attemptedCourseObj.getMystatus().equals(
context.getResources().getString(R.string.course_status_update))) {
holder.status.setTextColor(Color.BLUE);
}
holder.Name.setText(attemptedCourseObj.getCourseName());
holder.CBox.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(holder.CBox.isChecked()){
if(list.contains(getItem(position))){
list.remove(getItem(position));
}
}
}
});
//
return convertView;
}
}
the problem is when delete the checked it dosent delete the item that have the same id .
int pos=Data.CList.size();
SparseBooleanArray checked=CListView.getCheckedItemPositions();
for (int n = pos; n > 0; n--){
if (checked.get(n)){
code=Data.inList.get(n).getCCode();
Data.inList.remove(n);
}else if(CList.get(n).equal(code){
Data.inList.remove(n);
}
try to refresh the list with notifydatasetchanged and be sure that you delete the entire object from the list
You need to inform your adapter with the new modifications by giving the adapter the new dataset after removing the deleted elements from it and notify with the changes. You can do this as the following:
1)Add method into your adapter to set the new data as following:
public void setNewData(ArrayList<Entity> newEntities){
this.list = newEntities;
}
2)From the activity or the fragment call the previous method with the new data and call this line to notify the adapter with the changes
myAdapter.setNewData(myNewEntities);
myAdapter.notifyDataSetChanges();
Read this answer for more info about NotifyDataSetChanges() method
my images get shuffled or changed when i scroll in list view.......
Images get shuffled when i scroll down and keep on changing own its own...............
public class CustomListAdapter extends BaseAdapter {
private ArrayList<NewsItem> listData;
private LayoutInflater layoutInflater;
public CustomListAdapter(Context context, ArrayList<NewsItem> listData) {
this.listData = listData;
layoutInflater = LayoutInflater.from(context);
}
#Override
public int getCount() {
return listData.size();
}
#Override
public Object getItem(int position) {
return listData.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = layoutInflater.inflate(R.layout.activity_list_search, null);
holder = new ViewHolder();
holder.headlineView = (TextView) convertView.findViewById(R.id.title);
holder.reporterNameView = (TextView) convertView.findViewById(R.id.reporter);
holder.reportedDateView = (TextView) convertView.findViewById(R.id.date);
holder.imageView = (ImageView) convertView.findViewById(R.id.thumbImage);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
NewsItem newsItem = (NewsItem) listData.get(position);
holder.headlineView.setText(newsItem.getHeadline());
holder.reporterNameView.setText("Model: " + newsItem.getReporterName());
holder.reportedDateView.setText(newsItem.getDate());
if (holder.imageView != null) {
new ImageDownloaderTask(holder.imageView).execute(newsItem.getUrl());
}
return convertView;
}
static class ViewHolder {
TextView headlineView;
TextView reporterNameView;
TextView reportedDateView;
ImageView imageView;
}
}
The problem is very generic for new Android developers.
Your ImageDownloaderTask should take care of whether the downloaded image should still be posted on screen.
For example, after ImageDownloaderTask finishes one image downloading task (e.g. for index 15), it should make sure the 15th item is still displaying on screen. Since ListView is reusing all the item views, if you directly set the bit map to the original referenced view, your imageview will be shuffled.
Hi Im trying to create a CustomFilter for my BaseAdapter and am not having much luck .. i query my database for an array of the ID, Name and Sex. and on the listview i wish to search the list i have implemented the textview and have had no luck with the code.
here is my CustomAdapter
public class MyCustomBaseAdapter extends BaseAdapter {
private static ArrayList<Custom> AList;
private LayoutInflater inflat;
public MyCustomBaseAdapter(Context context, ArrayList<Custom> results) {
AList = results;
inflat = LayoutInflater.from(context);
}
public int getCount() {
return AList.size();
}
public Object getItem(int position) {
return AList.get(position);
}
public long getItemId(int position) {
Long.parseLong(AList.get(position).getID());
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = inflat.inflate(R.layout.suspect_list, null);
holder = new ViewHolder();
holder.txtName = (TextView) convertView.findViewById(R.id.suspect_name);
holder.txtSex = (TextView) convertView.findViewById(R.id.suspect_sex);
holder.txtId = (TextView) convertView.findViewById(R.id.suspect_id);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txtName.setText(AList.get(position).getName());
holder.txtSex.setText(AList.get(position).getSex());
holder.txtId.setText(AList.get(position).getID());
return convertView;
}
static class ViewHolder {
TextView txtName;
TextView txtSex;
TextView txtId;
}
}
I used Custom Filter in MultiSelectionList. Here is the Code.
Please download the demo, run and try to get understand and use that code as per your needs with modification as per your requirement.
Thanks.
Hi im trying to populate a listview from a baseadapter and when selected on a listview the wrong id is propagated.
here is my adapter
public class MyCustomBaseAdapter extends BaseAdapter {
private static ArrayList<Custom> AList;
private LayoutInflater inflat;
public MyCustomBaseAdapter(Context context, ArrayList<Custom> results) {
AList = results;
inflat = LayoutInflater.from(context);
}
public int getCount() {
return AList.size();
}
public Object getItem(int position) {
return AList.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = inflat.inflate(R.layout.suspect_list, null);
holder = new ViewHolder();
holder.txtName = (TextView) convertView.findViewById(R.id.suspect_name);
holder.txtSex = (TextView) convertView.findViewById(R.id.suspect_sex);
holder.txtId = (TextView) convertView.findViewById(R.id.suspect_id);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txtName.setText(AList.get(position).getName());
holder.txtSex.setText(AList.get(position).getSex());
holder.txtId.setText(AList.get(position).getID());
return convertView;
}
static class ViewHolder {
TextView txtName;
TextView txtSex;
TextView txtId;
}
}
Any Help you can provide would be great
More code can be availble upon request
Your getItemId() should return id.
So it should be like this->
public long getItemId(int position) {
return AList.get(position).getID();
}
Assuming that ID is long, if it is not then use -> Long.parseLong(AList.get(position).getID());