I'm using view pager with swiping tab layouts. And i'm displaying list view of data using custom adapter. And also onclick of list view i have a list view detail activity where I'm displaying data in more detail. In these detail activity i'm performing some changes to the data(some post method). after that I create an instance of customAdapter class and call notifyDataSetChanged() in order to refresh list view. My problem over here is the list view some times refreshes quickly and some times there is a delay of some seconds.
So, Can somebody suggest me proper usage of list view and what changes needs to be done in order to refresh list view whenever a post method is performed.
My code Fragment class:
private void showJsonData(String response) {
try {
String serviceID = LoggedInUserStore.getLoggedInServiceId(getContext());
List<Complaint> userList = new ArrayList<>(); //ArrayList of type user(POJO CLASS)
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i < jsonArray.length(); i++) {
if (serviceID.equals(jsonArray.getJSONObject(i).getString("ServiceID"))) {
if (jsonArray.getJSONObject(i).getString("CallStatusID").equalsIgnoreCase("1")) {
userList.add(0, Complaint.fromJson(jsonArray.getJSONObject(i))); //
}
}
}
assignAdapter = new AssignAdapter(getActivity(), userList);
listView.setAdapter(assignAdapter);
listView.invalidateViews();
assignAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
My custom adapter class
public class AssignAdapter extends BaseAdapter implements Filterable {
List<Complaint> ticket = new ArrayList<>();
private Context context;
String ticketNo, complaint, raiseDate;
Complaint user;
List<Complaint> temporaryList = new ArrayList<>();
/*String status, priority;*/
public AssignAdapter(Context context, List<Complaint> ticket) {
this.context = context;
this.ticket = ticket;
this.temporaryList = ticket;
}
#Override
public int getCount() {
return temporaryList.size();
}
#Override
public Object getItem(int position) {
return temporaryList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
public class viewHolderItem {
TextView ticketNumberText, complaintNameText, raisedDateText;
}
//Set the layout for the fragment and return it.
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
viewHolderItem holder;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.custom_list_view, null, true);
holder = new viewHolderItem();
holder.ticketNumberText = (TextView) convertView.findViewById(R.id.ticketIdSupervisor);
holder.complaintNameText = (TextView) convertView.findViewById(R.id.complaintNameSupervisor);
convertView.setTag(holder);
} else {
holder = (viewHolderItem) convertView.getTag();
}
user = temporaryList.get(position);
if (user != null) {
//Get the Ticket Number
Typeface custom_font = Typeface.createFromAsset(context.getAssets(), "fonts/DroidSerif.ttf");
ticketNo = temporaryList.get(position).getTicketNumber();
holder.ticketNumberText.setText(ticketNo);
holder.ticketNumberText.setTag("ticketNumber");
holder.ticketNumberText.setTypeface(custom_font);
//Get the complaint Name
complaint = temporaryList.get(position).getComplaintDetails();
holder.complaintNameText.setText(complaint);
holder.complaintNameText.setTag("complaint");
holder.complaintNameText.setTypeface(custom_font);
}
convertView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(context.getApplicationContext(), ComplaintDetailsSupervisor.class);
i.putExtra("COMPLAINT NAME", temporaryList.get(position).getComplaintDetails());
i.putExtra("RAISED DATE", temporaryList.get(position).getRaisedDate().substring(0, 10));
context.startActivity(i);
}
});
notifyDataSetChanged();
return convertView;
}
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
}
}
My List view detail activity class
dialogButtonOk.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
try {
assignComplaint();
al.remove(position);
AssignAdapter assignAdapter = new AssignAdapter(getApplicationContext(), al);
assignAdapter.notifyDataSetChanged();
ComplaintDetailsSupervisor.this.finish();
} catch (JSONException e) {
e.printStackTrace();
}
}
});
dialogButtonNo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
}
});
}
public void assignComplaint() throws JSONException {
//my custom method...
}
In the list view detail activity class i'm doing this
al.remove(position);
AssignAdapter assignAdapter = new AssignAdapter(getApplicationContext(), al);
assignAdapter.notifyDataSetChanged();
ComplaintDetailsSupervisor.this.finish();
Removing the position of list view and immediately calling adapter. This works fine but I don't know why sometimes it does not refreshes..May be when list view has a single item it does not refreshes immediately.
You are creating a new adapter and calling notifyDatasetChanged on it but have not called setAdapter with the new adapter as a parameter, hence why your list ist not refreshed.
You need to call
setAdapter(assignAdapter)
or reuse your existing assignAdapter and then call notifyDatasetChanged() on it.
Related
Im new in realm db. I completed add and get data in realm db. But, I couldn't sort(ascending and descending).Im my code it display items in listview. Listview contains 5 list and each list contains 4 field(name, age, skill and date). if I sort(ascending) name, need to ascending in 5 list.My code is not work
I post my code here,
private void Ascending_order() {
realm.beginTransaction();
RealmResults<Employee> result = realm.where(Employee.class)
.sort("name", Sort.ASCENDING).findAll();
realm.copyFromRealm(result);
realm.commitTransaction();
employeedetailadapter.notifyDataSetChanged();
}
Adapter class:
public class EmployeeDetailAdapter extends BaseAdapter {
private ArrayList<Employee>employeeDetaillists = new ArrayList<>();
private Context c;
private LayoutInflater inflater;
private OnItemClick mCallback;
private SimpleDateFormat df = new SimpleDateFormat("dd/mm/yyyy");
public EmployeeDetailAdapter(Context c,ArrayList<Employee> employeeDetaillists, OnItemClick listener) {
this.employeeDetaillists = employeeDetaillists;
this.c= c;
inflater = (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.mCallback = listener;
}
#Override
public int getCount() {
return employeeDetaillists.size();
}
#Override
public Object getItem(int position) {
return employeeDetaillists.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
View v = convertView;
Holder holder;
if (v==null){
v= (View) inflater.inflate(R.layout.list_single_item,null);
holder = new Holder();
holder.tvPersonName = (TextView) v.findViewById(R.id.tvPersonName);
holder.tvPersonAge = (TextView) v.findViewById(R.id.tvPersonAge);
holder.tvPersonSkill = (TextView) v.findViewById(R.id.tvPersonSkill);
holder.ivEditPesonDetail=(ImageView)v.findViewById(R.id.ivEditPesonDetail);
holder.tvPersondate=(TextView)v.findViewById(R.id.tvPersondate);
holder.ivDeletePerson=(ImageView)v.findViewById(R.id.ivDeletePerson);
v.setTag(holder);
}else{
holder = (Holder) v.getTag();
}
holder.tvPersonName.setText(employeeDetaillists.get(position).getName());
holder.tvPersonAge.setText(employeeDetaillists.get(position).getAge());
holder.tvPersonSkill.setText(employeeDetaillists.get(position).getSkill());
String strDate = df.format(employeeDetaillists.get(position).getSdate());
holder.tvPersondate.setText(strDate);
holder.ivDeletePerson.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Delete(employeeDetaillists.get(position).getName(),position);
}
});
return v;
}
private void Delete(String name, int position) {
mCallback.onClickdelete(name, position);
}
public void updateData(RealmResults<Employee> result) {
}
class Holder {
TextView tvPersonName, tvPersonAge, tvPersonSkill,tvPersondate;
ImageView ivDeletePerson, ivEditPesonDetail;
}
}
Your code does't change db. You just get sorted items but don't use them.
realm.copyFromRealm(result); // this line does nothing
realm.commitTransaction(); // this one too, because you change nothing
employeedetailadapter.notifyDataSetChanged(); // you data is the same, so this line also useless here
To see your data sorted you should use RealmResults in your adapter. With this approach your list always will sorted, even after adding new items. But note: your adapter should extends RealmRecyclerViewAdapter.
You should run this code before creating adapter and use result inside adapter:
RealmResults<Employee> result = realm.where(Employee.class)
.sort("name", Sort.ASCENDING).findAll();
Also you can try manually update data of your adapter.
private void Ascending_order() {
RealmResults<Employee> result = realm.where(Employee.class)
.sort("name", Sort.ASCENDING).findAll();
employeedetailadapter.updateData(result); // update data inside adapter before calling `notifyDataSetChanged`
employeedetailadapter.notifyDataSetChanged();
}
You need to create updateData method yourself:
public void updateData(RealmResults<Employee> result) {
employeeDetaillists = new ArrayList<Employee>(result);
}
First of all, while getting data from Realm you don't need to write it in Transaction. Write Transaction is required only when you are adding data in realm or updating any realm object.
And about your problem, To get sorted data from realm, You can do it like this
RealmResults<Employee> result = realm.where(Employee.class).sort("name", Sort.ASCENDING).findAll();
Now the data you got is sorted, If you still see wrong order in your ListView then there could be some issue in your Adapter. If you share your adapter code, then I can help further :)
Updated:
Adapter Class
public class EmployeeDetailAdapter extends BaseAdapter {
private RealmResults<Employee> employeeDetaillists;
private Context c;
private LayoutInflater inflater;
private OnItemClick mCallback;
private SimpleDateFormat df = new SimpleDateFormat("dd/mm/yyyy");
public EmployeeDetailAdapter(Context c,RealmResults<Employee> employeeDetaillists, OnItemClick listener) {
this.employeeDetaillists = employeeDetaillists;
this.c= c;
inflater = (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.mCallback = listener;
}
#Override
public int getCount() {
return employeeDetaillists.size();
}
#Override
public Object getItem(int position) {
return employeeDetaillists.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
View v = convertView;
Holder holder;
if (v==null){
v= (View) inflater.inflate(R.layout.list_single_item,null);
holder = new Holder();
holder.tvPersonName = (TextView) v.findViewById(R.id.tvPersonName);
holder.tvPersonAge = (TextView) v.findViewById(R.id.tvPersonAge);
holder.tvPersonSkill = (TextView) v.findViewById(R.id.tvPersonSkill);
holder.ivEditPesonDetail=(ImageView)v.findViewById(R.id.ivEditPesonDetail);
holder.tvPersondate=(TextView)v.findViewById(R.id.tvPersondate);
holder.ivDeletePerson=(ImageView)v.findViewById(R.id.ivDeletePerson);
v.setTag(holder);
}else{
holder = (Holder) v.getTag();
}
holder.tvPersonName.setText(employeeDetaillists.get(position).getName());
holder.tvPersonAge.setText(employeeDetaillists.get(position).getAge());
holder.tvPersonSkill.setText(employeeDetaillists.get(position).getSkill());
String strDate = df.format(employeeDetaillists.get(position).getSdate());
holder.tvPersondate.setText(strDate);
holder.ivDeletePerson.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Delete(employeeDetaillists.get(position).getName(),position);
}
});
return v;
}
private void Delete(String name, int position) {
mCallback.onClickdelete(name, position);
}
public void updateData(RealmResults<Employee> result) {
}
class Holder {
TextView tvPersonName, tvPersonAge, tvPersonSkill,tvPersondate;
ImageView ivDeletePerson, ivEditPesonDetail;
}
}
In your Activity please change following function
private void Ascending_order() {
result = realm.where(Employee.class)
.sort("name", Sort.ASCENDING).findAll();
employeedetailadapter.notifyDataSetChanged();
}
"result" list should be declared on class level and should be passed to Adapter's constructor as well.
Like
class Activity {
RealmResults<Employee> result;
EmployeeDetailAdapter employeedetailadapter;
//// Other Code
public onCreate(Bundle b) {
result = realm.where(Employee.class).findAll();
employeedetailadapter = new EmployeeDetailAdapter(this, result, listener);
// Other code
}
}
I'm trying to get data using retrofit2 and display those data using a list passing through as a parameter of Custom adapter. When I store data in a List in onResponse() method, in onResponse() method list have some value. But in oncreate() method its give me null. Though, I declared List as global. When I run the app sometimes its display nothing and sometimes app get crash. I know it's sounds like crazy. But it's happen. so, I want to know, what's wrong with my Code? how can I display data in listview?
Forgive me if something wrong with my question pattern yet this my maiden question at this site.
MainActivity`
public class LaboratoryValues extends AppCompatActivity {
public List<Data> productList = null;
List<Data>arrayList = null;
int size;
String st;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_laboratory_values);
//productList = new ArrayList<Data>();
getInvestigation();
for(int i =0; i < size; i++){
st = arrayList.get(i).getName();
}
System.out.println("Name : "+st);//here print Name : null
ListView lview = (ListView) findViewById(R.id.listview);
ListviewAdapter adapter = new ListviewAdapter(this, arrayList);
lview.setAdapter(adapter);
}
private void getInvestigation() {
/* final ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
progressDialog.setCancelable(false); // set cancelable to false
progressDialog.setMessage("Please Wait"); // set body
progressDialog.show(); // show progress dialog*/
ApiInterface apiService =
Api.getClient(ApiInterface.BASE_URL).create(ApiInterface.class);
Call<Investigation> investigationCall = apiService.getInvestigation();
investigationCall.enqueue(new Callback<Investigation>() {
#Override
public void onResponse(Call<Investigation> call, Response<Investigation> response) {
arrayList = response.body().getData();
//productList.addAll(arrayList);
size = response.body().getData().size();
for (int i = 0; i < size; i++) {
System.out.println("Name : " + arrayList.get(i).getName());//here printing Name is ok
}
}
#Override
public void onFailure(Call<Investigation> call, Throwable t) {
Toast.makeText(getApplicationContext(),"data list is empty",Toast.LENGTH_LONG).show();
}
});
}
}
Custom Adapter (listviewAdapter)
public class ListviewAdapter extends BaseAdapter {
public List<Data> productList;
Activity activity;
//Context mContext;
public ListviewAdapter(Activity activity, List<Data> productList) {
super();
this.activity = activity;
this.productList = productList;
}
#Override
public int getCount() {
return productList.size();
}
#Override
public Object getItem(int position) {
return productList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
private class ViewHolder {
TextView name;
TextView normal_finding;
TextView increased;
TextView decreased;
TextView others;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
LayoutInflater inflater = activity.getLayoutInflater();
if (convertView == null) {
convertView = inflater.inflate(R.layout.listview_row, null);
holder = new ViewHolder();
holder.name = convertView.findViewById(R.id.name);
holder.normal_finding =convertView.findViewById(R.id.normal_finding);
holder.increased = convertView.findViewById(R.id.increased);
holder.decreased = convertView.findViewById(R.id.decreased);
holder.others =convertView.findViewById(R.id.others);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
Data item = productList.get(position) ;
holder.name.setText(item.getName());
System.out.println("holderName : "+item.getName() );
holder.normal_finding.setText(item.getNormal_finding());
System.out.println("holderName : "+item.getNormal_finding() );
holder.increased.setText(item.getIncreased());
holder.decreased.setText(item.getDecreased());
holder.others.setText(item.getOthers());
return convertView;
}
}
It's perfectly normal that it dosent work.
putting your method getInvistigation() before the loop does not mean that the response of your request was done
Calling a webservice creates another thread that waits for the server to send the response, sometimes the response takes time depends from the server and the latency of your internet connection.
you simply need to place the treatment (the loop and adapter) inside getInvistagion after getting the data.
I am following a tutorial about multiple choice listview in android.
When executing the app, the listview shows some items, not all of them. After clicking on the listview, it shows all items.
I want to know where is the reason of that issue.
This is the code for MainActivity class:
public class MainActivity extends AppCompatActivity {
Toolbar toolbar;
FloatingActionButton fab;
ListView list;
TextView txt_menu;
String dipilih;
private static final String TAG = MainActivity.class.getSimpleName();
Adapter adapter;
ProgressDialog pDialog;
List<Data> itemList = new ArrayList<Data>();
// Sesuaikan dengan IP Address PC/LAptop atau ip emulator bawaan android 10.0.2.2
private static String url = "https://.../test/menu.php";
public static final String TAG_NAMA = "nama";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
fab = (FloatingActionButton) findViewById(R.id.fab);
list = (ListView) findViewById(R.id.list_menu);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String checkbox = "";
for (Data hold : adapter.getAllData()) {
if (hold.isCheckbox()) {
checkbox += "\n" + hold.getMenu();
}
}
if (!checkbox.isEmpty()) {
dipilih = checkbox;
} else {
dipilih = "Anda Belum Memilih Menu.";
}
formSubmit(dipilih);
}
});
callVolley();
adapter = new Adapter(this, (ArrayList<Data>) itemList);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
adapter.setCheckBox(position);
}
});
}
private void formSubmit(String hasil){
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
LayoutInflater inflater = getLayoutInflater();
View dialogView = inflater.inflate(R.layout.form_submit, null);
dialog.setView(dialogView);
dialog.setIcon(R.mipmap.ic_launcher);
dialog.setTitle("Menu Yang Dipilih");
dialog.setCancelable(true);
txt_menu = (TextView) dialogView.findViewById(R.id.txt_menu);
txt_menu.setText(hasil);
dialog.setNeutralButton("CLOSE", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
dialog.show();
}
private void callVolley(){
itemList.clear();
// menapilkan dialog loading
pDialog = new ProgressDialog(this);
pDialog.setMessage("Loading...");
showDialog();
// membuat request JSON
JsonArrayRequest jArr = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
hideDialog();
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Data item = new Data();
item.setMenu(obj.getString(TAG_NAMA));
// menambah item ke array
itemList.add(item);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifikasi adanya perubahan data pada adapter
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hideDialog();
}
});
// menambah request ke request queue
AppController.getInstance().addToRequestQueue(jArr);
}
private void showDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hideDialog() {
if (pDialog.isShowing())
pDialog.dismiss();
}
}
And this is the Adapter class:
public class Adapter extends BaseAdapter {
private Context activity;
private ArrayList<Data> data;
private static LayoutInflater inflater = null;
private View vi;
private ViewHolder viewHolder;
public Adapter(Context context, ArrayList<Data> items) {
this.activity = context;
this.data = items;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return data.size();
}
#Override
public Object getItem(int i) {
return i;
}
#Override
public long getItemId(int i) {
return i;
}
#Override
public View getView(int position, View view, ViewGroup viewGroup) {
vi = view;
final int pos = position;
Data items = data.get(pos);
if(view == null) {
vi = inflater.inflate(R.layout.list_row, null);
viewHolder = new ViewHolder();
viewHolder.checkBox = (CheckBox) vi.findViewById(R.id.cb);
viewHolder.menu = (TextView) vi.findViewById(R.id.nama_menu);
vi.setTag(viewHolder);
}else {
viewHolder = (ViewHolder) view.getTag();
viewHolder.menu.setText(items.getMenu());
}
if(items.isCheckbox()){
viewHolder.checkBox.setChecked(true);
} else {
viewHolder.checkBox.setChecked(false);
}
return vi;
}
public ArrayList<Data> getAllData(){
return data;
}
public void setCheckBox(int position){
Data items = data.get(position);
items.setCheckbox(!items.isCheckbox());
notifyDataSetChanged();
}
public class ViewHolder{
TextView menu;
CheckBox checkBox;
}
}
If you need other code parts to detect the problem, please let me know.
EDIT
First launch
After clicking on the listview
The problem is this bit of your code in your adapter's getView() callback:
if(view == null) {
...
}else {
...
viewHolder.menu.setText(items.getMenu());
}
What's happening here is that you're only caling setText() when the item view is recycled by the ListView. The reason everything shows up after you click a checkbox is that the ListView rebinds everything when you call notifyDataSetChanged().
You should call this method outside of the if/else statement so that it is executed every time.
if(view == null) {
...
}else {
...
}
viewHolder.menu.setText(items.getMenu());
I think the issue you are having is coming from the getView() method in your Adapter class.
Since you are using a ViewHolder to recycle objects you are first checking if the exist first before creating them if(view == null). But, you are only creating them and not assigning the TextView objects a String value. You only do that once the object has already been created. So, when you click on an item, you are calling notifyDataSetChanged causing the list to be updated. Then the values are set in the `TextView.
So try this instead: put the line viewHolder.menu.setText(items.getMenu()); outside the conditional statement:
#Override
public View getView(int position, View view, ViewGroup viewGroup) {
vi = view;
final int pos = position;
Data items = data.get(pos);
if(view == null) {
vi = inflater.inflate(R.layout.list_row, null);
viewHolder = new ViewHolder();
viewHolder.checkBox = (CheckBox) vi.findViewById(R.id.cb);
viewHolder.menu = (TextView) vi.findViewById(R.id.nama_menu);
vi.setTag(viewHolder);
}else {
viewHolder = (ViewHolder) view.getTag();
}
viewHolder.menu.setText(items.getMenu());
if(items.isCheckbox()){
viewHolder.checkBox.setChecked(true);
} else {
viewHolder.checkBox.setChecked(false);
}
return vi;
}
try this once
adapter = new Adapter(this, (ArrayList) itemList);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
adapter.setCheckBox(position);
}
});
list.setAdapter(adapter);
}
set adapter at the end
I'm new to android. I'm trying to get my list view to update, I've tried everything...from calling notifydatasetchanged on the ui thread to just simply recreating my list adapter but for whatever reason when I update, no matter which method I use I have to scroll to see the changes. By this I mean that the data updates (say 13:01 changes to 13:02 in the list), it will update, but to see the change I have to scroll so that 13:01 goes off screen and then move back and it will have updated visually.
Why is this? (I can't post code right now as I'm on my phone but if required I will post later.)
EDIT: Here's the relevant code...sorry it took so long I haven't been at my computer for a couple of days.
Relevant parts of ListFragment:
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
super.onCreateView(inflater, container, savedInstanceState);
return inflater.inflate(R.layout.match_fragment, container, false);
}
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
MatchAdapter adapter = (MatchAdapter) this.getListAdapter();
if(futureMatches)
adapter = new MatchAdapter (this.getActivity(), ((MainActivity)this.getActivity()).getMatches(), futureMatches);
else
adapter = new MatchAdapter (this.getActivity(), ((MainActivity)this.getActivity()).getPastMatches(), futureMatches);
setListAdapter(adapter);
}
public void refresh()
{
MatchAdapter adapter;
//Update array in mainactivity
if(futureMatches)
MainActivity.refreshMatches((MainActivity) getActivity());
else
MainActivity.refreshPastMatches((MainActivity) getActivity());
//put updated entries in the adapter
if(futureMatches)
adapter = new MatchAdapter (getActivity(), ((MainActivity)getActivity()).getMatches(), futureMatches);
else
adapter = new MatchAdapter (getActivity(), ((MainActivity)getActivity()).getPastMatches(), futureMatches);
setListAdapter(adapter);
updateList();
}
public void updateList(){
this.getActivity().runOnUiThread(new Runnable() {
public void run() {
((BaseAdapter) getListAdapter()).notifyDataSetChanged();
getListView().refreshDrawableState();
getListView().invalidate();
}
});
}
public void onViewStateRestored(Bundle savedInstanceState)
{
super.onViewStateRestored(savedInstanceState);
}
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
refresh();
}
My adapter class:
public class MatchAdapter extends BaseAdapter
{
private final Activity context;
private LayoutInflater inflater;
private boolean time = false;
private boolean futureMatchAdapter = true;
private ArrayList<String> matchList;
public MatchAdapter(Context cont, ArrayList<String> matches, boolean isFutureMatchAdapter)
{
matchList = matches;
futureMatchAdapter = isFutureMatchAdapter;
context = (Activity) cont;
inflater = LayoutInflater.from(context);
}
public int getCount()
{
return MatchAdapter.size();
}
#Override
public Object getItem(int position)
{
return MatchAdapter.get(position);
}
public long getItemId(int position)
{
return position;
}
public View getView(int position, View convertView, ViewGroup parent)
{
ViewHolder holder;
String curPos = "";
curPos = MatchAdapter.get(position);
//times, future matches and past matches are handled differently
if(curPos.contains("Last updated:"))
time = true;
else
time = false;
if (convertView == null)
{
holder = new ViewHolder();
if(time)
{
convertView = inflater.inflate(R.layout.time_item, null);
holder.title = (TextView) convertView.findViewById(R.id.item_time);
}
else
{
if(futureMatchAdapter)
{
convertView = inflater.inflate(R.layout.feed_item, null);
holder.title = (TextView) convertView.findViewById(R.id.item_title);
}
else
{
convertView = inflater.inflate(R.layout.past_feed_item, null);
holder.title = (TextView) convertView.findViewById(R.id.item_title_past);
}
}
convertView.setTag(holder);
}
else
holder = (ViewHolder) convertView.getTag();
if(futureMatchAdapter)
holder.title.setText(matchList.get(position));
else
{
String matchString = matchList.get(position);
String alwaysVisible = matchString.replace("<", "vs");
alwaysVisible = alwaysVisible.replace(">", "vs");
if(!time)
alwaysVisible = alwaysVisible.substring(0, alwaysVisible.length() - 1);
holder.title.setText(alwaysVisible);
if(matchString.contains(">"))
{
String winner = matchString.substring(0, matchString.indexOf(">")) + "won!";
alwaysVisible = alwaysVisible.concat(winner);
}
else if(matchString.contains("<"))
{
String winner = matchString.substring(matchString.indexOf("<") + 2, matchString.indexOf("\n")) + " won!";
alwaysVisible = alwaysVisible.concat(winner);
}
holder.title.setOnClickListener(new pastMatchesOnclickListener(alwaysVisible)
{
public void onClick(View v)
{
((TextView) v).setText(matchWinner);
}
});
}
return convertView;
}
static class ViewHolder
{
TextView title;
TextView time;
}
}
did you try to update your list using the adapter?
dataadapter.clear();
dataadapter.addAll(allDataResult);
To show and update content in a ListView you should:
Create or find your ListView
Create your ListAdapter
Add your ListAdapter to your ListView
Add data to your ListAdapter
Call notifyDataSetChanged() on your ListAdapter.
Example:
ListView listView = (ListView) findViewById(R.id.listview);
MyListAdapter myListAdapter = new MyListAdapter();
listView.setAdapter(myListAdapter);
myListAdapter.add("Hello");
myListAdapter.add("Hi");
myListAdapter.notifyDataSetChanged();
Note: if you're using a subclass of ArrayAdapter the notifyDataSetChanged() will be called for you when you use the methods add(), addAll(), etc.
I am fairly new to Android development and I am trying to build a ListView which get data from web service using gson. I have a model class, a list class, an adapter class and the activity class.
The list works fine and it got the data, and now I want to integrate the OnItemClickListener to it and pass the data to the 2nd activity. And I'd like to get the item id (DistrictId) and pass it to the next Activity(listView) instead of the row id. It would be great if someone could show me the light... as the documentation is not as clear to understand and because I am new.
Below is my code.
The model class
package com.sample.myapp;
public class DistrictModel {
private String id;
private String districtName;
public String getDistrictId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getDistrictName(){
return districtName;
}
public void setDistrictEN(String districtName){
this.districtName = districtName;
}
}
The List class
public class DistrictList {
private List<DistrictModel> districts;
public List<DistrictModel> getDistricts(){
return districts;
}
public void setDistrictList(List<DistrictModel> districts){
this.districts = districts;
}
}
The Adapter class
public class DistrictAdapter extends ArrayAdapter<DistrictModel>{
int resource;
String response;
Context context;
private LayoutInflater dInflater;
public DistrictAdapter(Context context, int resource, List<DistrictModel> objects) {
super(context, resource, objects);
this.resource = resource;
dInflater = LayoutInflater.from(context);
}
static class ViewHolder {
TextView title;
}
public View getView(int position, View convertView, ViewGroup parent)
{
ViewHolder holder;
//Get the current location object
DistrictModel lm = (DistrictModel) getItem(position);
//Inflate the view
if(convertView==null)
{
convertView = dInflater.inflate(R.layout.item_district, null);
holder = new ViewHolder();
holder.title = (TextView) convertView
.findViewById(R.id.district_name);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
holder.title.setText(lm.getDistrictName());
return convertView;
}
}
The activity class
public class DistrictListActivity extends Activity{
LocationManager lm;
ArrayList<DistrictModel> districtArray = null;
DistrictAdapter districtAdapter;
DistrictList list;
ListView lv;
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.districtlist_layout);
lv = (ListView) findViewById(R.id.list_district);
districtArray = new ArrayList<DistrictModel>();
districtAdapter = new DistrictAdapter(DistrictListActivity.this, R.layout.item_district, districtArray);
lv.setTextFilterEnabled(true);
lv.setAdapter(districtAdapter);
try {
new DistrictSync().execute("http://aws.something.com/service");
} catch(Exception e) {}
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View convertView, int position, long id) {
AlertDialog.Builder adb=new AlertDialog.Builder(DistrictListActivity.this);
adb.setTitle("LVSelectedItemExample");
adb.setMessage("Selected Item is = "+(lv.getItemIdAtPosition(position)));
adb.setPositiveButton("Ok", null);
adb.show();
}
}); **//i'd like to get the DistrictId from the json data.**
}
private class DistrictSync extends AsyncTask<String, Integer, DistrictList> {
protected DistrictList doInBackground(String... urls) {
DistrictList list = null;
int count = urls.length;
for (int i = 0; i < count; i++) {
try {
// ntar diganti service
RestClient client = new RestClient(urls[i]);
try {
client.Execute(RequestMethod.GET);
} catch (Exception e) {
e.printStackTrace();
}
String json = client.getResponse();
list = new Gson().fromJson(json, DistrictList.class);
//
} catch(Exception e) {}
}
return list;
}
protected void onProgressUpdate(Integer... progress) {
}
protected void onPostExecute(DistrictList dislist) {
for(DistrictModel lm : dislist.getDistricts())
{
districtArray.add(lm);
}
districtAdapter.notifyDataSetChanged();
}
}
}
For testing purpose, now I click the row it will show me the row id, so I know the onclick listener works, but I just want it to grab me the DistrictId so I can use it to pass to the next activity.
Thank you so much.
(out of my head) Try this:
((DistrictModel)lv.getAdapter().getItem(position)).getDistrictId();
Generally when you want to pass data from one Activity to another, you just place it into the Intent that you use to create the new Activity.
For example (and here are some additional examples):
Intent i = new Intent(context, MyNewActivity.class);
i.putExtra("MyCurrentHealth", mCurrentHealth);
context.startActivity(i);
To retrieve the data do this:
Bundle extras = getIntent().getExtras();
if (extra != null) {
... // Do stuff with extras
}