Develop Reference

How can i get the all value of Recyclerview on Button click?

public class MainActivity extends Activity implements
GetDataContract.View,RecyclerItemClickListener {
private Presenter mPresenter;
RecyclerView recyclerView;
LinearLayoutManager linearLayoutManager;
CountryAdapter countryAdapter;
EditText etEnterName;
Button btAddItem;
List<CountryRes> allCountriesEditValue;
List<CountryRes> allCountriesData;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getView();
}
private void getView() {
/*presentator */
mPresenter = new Presenter(this);
/*initiliaze of id*/
recyclerView = (RecyclerView) findViewById(R.id.recycler);
etEnterName = (EditText) findViewById(R.id.etEnterName);
btAddItem = (Button) findViewById(R.id.btAddItem);
linearLayoutManager = new LinearLayoutManager(this);
/*initiliaze the arraylist*/
allCountriesData=new ArrayList<>();
recyclerView.setLayoutManager(linearLayoutManager);
btAddItem.setOnClickListener(new AddButtonClick());
}
#Override
public void onGetDataFailure(String message) {
Log.d("Status", message);
}
#Override
public void onGetDataSuccess(String message, List<CountryRes>
allCountriesData) {
/*add the value mannulay*/
CountryRes countryRes = new CountryRes();
countryRes.setName(etEnterName.getText().toString());
allCountriesData.add(countryRes);
countryAdapter = new CountryAdapter(getApplicationContext(),
allCountriesData, (RecyclerItemClickListener) this);
recyclerView.setAdapter(countryAdapter);
/*set the data in the room*/
AppDataBase database = AppDataBase.getAppDatabase(this);
DataGenerator.with(database).generateCats(allCountriesData);
Logger.displayCatsInLog(database.catDao().loadAll());
countryAdapter.notifyDataSetChanged();
}
/*on item click*/
#Override
public void onDashBoardItemClick(String pos) {
Bundle bundle = new Bundle();
bundle.putString("TABVALUE", pos);
Intent intent = new Intent(getApplicationContext(),
DynamicTabsActivity.class);
intent.putExtras(bundle);
startActivity(intent);
}
private class AddButtonClick implements View.OnClickListener {
#Override
public void onClick(View view) {
mPresenter.getDataFromURL(getApplicationContext(), "");
}
}
}
class adapter
public class CountryAdapter extends
RecyclerView.Adapter<CountryAdapter.MyViewHolder> {
private Context context;
private List<CountryRes> list = new ArrayList<>();
private List<CountryRes> list_edit = new ArrayList<>();
private RecyclerItemClickListener onRecyclerItemClickListener;
public CountryAdapter(Context context, List<CountryRes> list,
RecyclerItemClickListener onRecyclerItemClickListener) {
this.context = context;
this.list = list;
this.onRecyclerItemClickListener = onRecyclerItemClickListener;
}
#Override
public CountryAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
View layoutView;
layoutView =
LayoutInflater.from(parent.getContext()).inflate(R.layout.card_item, parent,
false);
return new FooterViewHolder(layoutView,
onRecyclerItemClickListener);
}
#Override
public void onBindViewHolder(CountryAdapter.MyViewHolder holder, int
position) {
holder.tvCountryName.setText(list.get(position).getName());
}
#Override
public int getItemCount() {
return list.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
TextView tvCountryName;
LinearLayout llListItem;
public MyViewHolder(View itemView) {
super(itemView);
tvCountryName = (TextView)
itemView.findViewById(R.id.tv_country_name);
llListItem = (LinearLayout)
itemView.findViewById(R.id.llListItem);
}
}
private class FooterViewHolder extends MyViewHolder {
public FooterViewHolder(View layoutView, final
RecyclerItemClickListener onRecyclerItemClickListener) {
super(layoutView);
llListItem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (onRecyclerItemClickListener != null) {
onRecyclerItemClickListener.onDashBoardItemClick(tvCountryName.getText().toS
tring());
}
}
});
}
}
}
Interface
public interface RecyclerItemClickListener {
void onDashBoardItemClick(String pos);
}

Case 1: Inside ViewHolder if you need to understand exactly position of clicked item you could call getAdapterPosition().
Case 2: You just need to receive all items of adapter. It is simple, make getter method which will return the items.
Case 3: Send info to activity, first make some specific event listener of your view inside ViewHolder, then event triggers (user clicks or other) and you call your interface method which you passed inside adapter, that was implemented in activity.
Tell me if you need an example, i will do it.

Try this one,
Button button= (Button) findViewById(R.id.your_button_id);
button.setOnClickListener( new OnClickListener() {
#Override
public void onClick(View v) {
//create new ArrayList.
//ArrayList<CountryRes> showList=new ArrayList<>;
//now, put all stored data of a list in this arraylist.
showList.addAll(allCountriesData);
}
});

Send data from CardView in RecyclerView to new fragment?

So I have a CardView in a RecyclerView which has some data inside it. I would like to click on a specific card and launch a new fragment that displays specific data from the data in the CardView (more details about the data in the CardView). Here is the relevant code.
I don't have the most experience in programming and Android in general, any help would be appreciated!
DetailsFragment: `
public class DetailsFragment extends Fragment {
private CardView cardView;
private RecyclerView rv;
private List<Detail> detailList = new ArrayList<>();
public DetailsFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_details, container, false);
Context context = getActivity();
cardView = (CardView) rootView.findViewById(R.id.cv);
rv = (RecyclerView) rootView.findViewById(R.id.rv);
final LinearLayoutManager llm = new LinearLayoutManager(context);
rv.setLayoutManager(llm);
RVDetailAdapter adapter = new RVDetailAdapter(detailList);
rv.setAdapter(adapter);
initializeData();
initializeAdapter();
return rootView;
}
private void initializeData() {
detailList = new ArrayList<>();
// not sure here
detailList.add(new Detail(" "));
}
private void initializeAdapter(){
RVDetailAdapter adapter = new RVDetailAdapter(detailList);
rv.setAdapter(adapter);
}
}
RVNewsAdapater:
public class RVNewsAdapter extends RecyclerView.Adapter<RVNewsAdapter.NewsViewHolder> {
public static final String KEY_LINK ="link";
public static class NewsViewHolder extends RecyclerView.ViewHolder
implements View.OnClickListener {
private static final String TAG = "Hello";
CardView cv;
TextView date;
TextView link;
TextView title;
TextView today;
public NewsViewHolder(View itemView) {
super(itemView);
cv = (CardView) itemView.findViewById(R.id.cv);
date = (TextView) itemView.findViewById(R.id.date);
link = (TextView) itemView.findViewById(R.id.link);
title = (TextView) itemView.findViewById(R.id.heading);
today = (TextView) itemView.findViewById(R.id.today);
itemView.setOnClickListener(this);
}
#Override
public void onClick(View view) {
Context context = view.getContext();
Intent intent = null;
for(int postion = 0; postion<42; postion++) {
intent = new Intent(context, Details.class);
}
context.startActivity(intent);
}
}
List<News> news;
RVNewsAdapter(List<News> news) {
this.news = news;
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
#Override
public RVNewsAdapter.NewsViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.itemnewsfeed, viewGroup, false);
NewsViewHolder nvh = new NewsViewHolder(v);
return nvh;
}
#Override
public void onBindViewHolder(NewsViewHolder newsViewHolder, int i) {
newsViewHolder.date.setText(news.get(i).date);
newsViewHolder.link.setText(news.get(i).link);
newsViewHolder.title.setText(news.get(i).title);
newsViewHolder.today.setText(news.get(i).today);
}
#Override
public int getItemCount() {
if (news != null) {
return news.size();
}
return 0;
}
}
RVDetailAdapter:
public class RVDetailAdapter extends RecyclerView.Adapter<RVDetailAdapter.DetailViewHolder> {
public static class DetailViewHolder extends RecyclerView.ViewHolder {
TextView link;
public DetailViewHolder(View itemView) {
super(itemView);
link = (TextView) itemView.findViewById(R.id.link);
}
}
List<Detail> detail;
RVDetailAdapter(List<Detail> detail) {
this.detail = detail;
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
#Override
public RVDetailAdapter.DetailViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.itemnewsfeed, viewGroup, false);
DetailViewHolder dvh = new DetailViewHolder(v);
return dvh;
}
#Override
public void onBindViewHolder(DetailViewHolder detailViewHolder, int i) {
detailViewHolder.link.setText(detail.get(i).link);
}
#Override
public int getItemCount() {
if (detail != null) {
return detail.size();
}
return 0;
}
}

Not sure if you're still looking for an answer, but I just saw the post and thought I'd give you one option.
When I'm using a RecyclerView (doesn't matter if it's using the CardView or not, it's the same for any list item), I create a a click listener for the view item in the Adapter. When the user clicks the item/cardview, I dispatch an item click event. It's your choice on how you respond - you can use a standard callback interface (and pass in your listener when you create the adapter) or use something like EventBus.
Here's an example of the code you would add to your adapter class:
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(itemLayout, parent, false);
view.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
itemClick(view);
}
});
return new ViewHolder(view);
}
private void itemClick(View view) {
//Handle item event here
//EventBus.getDefault().post(new ItemSelectedEvent(/*send apprpopriate data*/));
}

How can add EventListener on my Adapter?

I have an Android Activity that have a RecycleView. I want to add an event listener, so I have build this code:
public class ResultActivity extends AppCompatActivity {
private List<Result> lista;
private RecyclerView recyclerView;
private ResultsAdapter pAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.results_activity);
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
//recupero la lista delle medication
ResultDAO manager = new ResultDAO(this);
lista=manager.getResults();
pAdapter = new ResultsAdapter(lista, new ResultsAdapter.OnItemClickListener() {
#Override
public void onItemClick(Result item) {
try{
//recupero i dati della lista in pagina
final Dialog dialog = new Dialog(ResultActivity.this);
//setting custom layout to dialog
dialog.setContentView(R.layout.result_modal);
dialog.setTitle("Parametri");
}catch(Exception e){
Log.e("","");
}
}
});
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(pAdapter);
}
}
This is my custom adapter:
public class ResultsAdapter extends RecyclerView.Adapter<ResultsAdapter.MyViewHolder> {
private List<Result> list;
private final OnItemClickListener listener;
public interface OnItemClickListener {
void onItemClick(Result item);
}
public class MyViewHolder extends RecyclerView.ViewHolder{
public TextView startDate, endDate,examination;
Result result;
public MyViewHolder(View view) {
super(view);
startDate = (TextView) view.findViewById(R.id.startDate);
endDate = (TextView) view.findViewById(R.id.endDate);
examination = (TextView) view.findViewById(R.id.examination);
}
}
public ResultsAdapter(List<Result> list,OnItemClickListener listener)
{
this.listener=listener;
this.list = list;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.results_list_row, parent, false);
return new MyViewHolder(itemView);
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Result result = list.get(position);
holder.startDate.setText(result.getDateStart()!=null ? result.getDateStart() : "");
holder.endDate.setText(result.getDateEnd()!=null ? result.getDateEnd() : "");
holder.examination.setText(result.getInfo().getDisplayName());
}
#Override
public int getItemCount() {
return list.size();
}
}
Now if I try to start my application and I try to click on one or more item, the method OnClick, does not start.
How can I fixed it?

Read this answer for better understanding
Use below code in Adapter class :-
holher.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
// your code
}
});

Check this blog post.
http://www.littlerobots.nl/blog/Handle-Android-RecyclerView-Clicks/
It allows you to add 'on-click-listeners' in a much simpler, reusable way.
Example:
ItemClickSupport.addTo(recyclerView).setOnItemClickListener(new ItemClickSupport.OnItemClickListener() {
#Override
public void onItemClicked(RecyclerView recyclerView, int position, View v) {
// Do your thing
}
});

Recycler View Not Refreshing

I'm doing a RecyclerView example. The thing is that when I add the first item on the list it shows the item correctly on the recyclerview but the next items I add aren't showing on the recycle view.
Please help me.
Adapter code is:
public class PersonAdapter extends RecyclerView.Adapter<PersonAdapter.PersonViewHolder> {
private ArrayList<Person> mData;
LayoutInflater inflater;
public PersonAdapter() {
}
public PersonAdapter(Context context, ArrayList<Person> data) {
inflater = LayoutInflater.from(context);
update(data);
}
public void update(ArrayList<Person> data) {
mData = data;
notifyDataSetChanged();
}
#Override
public PersonViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.custom_row, parent, false);
PersonViewHolder holder = new PersonViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(PersonViewHolder holder, int position) {
Person person = mData.get(position);
holder.ivImagen.setImageResource(R.drawable.ic_action_android);
holder.tvNombre.setText(person.getName());
holder.tvApellido.setText(person.getLast_name());
}
#Override
public int getItemCount() {
return mData.size();
}
public static class PersonViewHolder extends RecyclerView.ViewHolder {
ImageView ivImagen;
TextView tvNombre;
TextView tvApellido;
public PersonViewHolder(View itemView) {
super(itemView);
ivImagen = (ImageView) itemView.findViewById(R.id.cr_iv_imagen);
tvNombre = (TextView) itemView.findViewById(R.id.cr_tv_name);
tvApellido = (TextView) itemView.findViewById(R.id.cr_tv_last_name);
}
}}
Main Activity Code is:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
ArrayList<Person> persons = new ArrayList<>();
EditText et_name;
EditText et_last_name;
RecyclerView rv_names;
PersonAdapter adapter;
Button btAgregar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_name = (EditText) findViewById(R.id.tv_name);
et_last_name = (EditText) findViewById(R.id.tv_last_name);
btAgregar = (Button) findViewById(R.id.bt_agregar);
rv_names = (RecyclerView) findViewById(R.id.rv_nombres);
LinearLayoutManager manager = new LinearLayoutManager(this);
rv_names.setLayoutManager(manager);
adapter = new PersonAdapter(this, persons);
rv_names.setAdapter(adapter);
btAgregar.setOnClickListener(this);
}
#Override
public void onClick(View v) {
Person person = new Person(et_name.getText().toString(), et_last_name.getText().toString());
persons.add(person);
Toast.makeText(this, "Items: " + String.valueOf(persons.size()), Toast.LENGTH_SHORT).show();
} }

Try this code for onClick function
#Override
public void onClick(View v) {
Person person = new Person(et_name.getText().toString(), et_last_name.getText().toString());
persons.add(person);
adapter.update(persons);
Toast.makeText(this, "Items: " + String.valueOf(persons.size()), Toast.LENGTH_SHORT).show();
}
UPDATE:
In Adapter code, try the following changes..
public void update(ArrayList<Person> data) {
mData.clear();
mData.addAll(data)
notifyDataSetChanged();
}

In the onClick you are adding a person, but you are not passing the updated list to the adapter by calling the adapter's update method. Might this be the reason?

i just added called adapter.notifyDataSetChanged();

How to intent fragment to activity once clicked recycler list item with in fragment and how to get the recycler item value?

I here by attached my code.
I have a fragment with in that have recycler list item list.
If i click the recycler item on fragment i can't move to new activity.
And i want to get the recycler item value which item i have clicked.
So kindly please suggest me to how to intent fragment to activity once clicked recycler list item with in fragment and how to get the recycler item value?
ContactOneFragment
public class ContactOneFragment extends Fragment {
protected RecyclerView.LayoutManager mLayoutManager;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view= inflater.inflate(R.layout.fragment_contactone, null, false);
RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
DetailModel detail[] = {
new DetailModel("Meenakshi.A","9566415797"),
new DetailModel("Pandimurugeswari.S","8940144873"),
new DetailModel("Selvam. K","7708410451"),
new DetailModel("Raja Lakshmi.V","9952754812"),
new DetailModel("Narmatha Devi.S","9894762259"),
new DetailModel("Murugan.M","9566368816"),
new DetailModel("SenthilMurugan.A","7667453595"),
};
mLayoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(mLayoutManager);
DetailAdapter mAdapter = new DetailAdapter(detail);
recyclerView.setAdapter(mAdapter);
recyclerView.setItemAnimator(new DefaultItemAnimator());
return view;
}
}
DetailAdapter
public class DetailAdapter extends RecyclerView.Adapter<DetailAdapter.ViewHolder> {
private DetailModel[] itemsData;
private final ArrayList<Integer> selected = new ArrayList<>();
OnItemClickListener mItemClickListener;
Context context;
public DetailAdapter(DetailModel[] itemsData) {
this.itemsData = itemsData;
}
// Create new views (invoked by the layout manager)
#Override
public DetailAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
// create a new view
View itemLayoutView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.contactnamenumber, null);
// create ViewHolder
ViewHolder viewHolder = new ViewHolder(itemLayoutView);
return viewHolder;
}
// Replace the contents of a view (invoked by the layout manager)
#Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
// - get data from your itemsData at this position
// - replace the contents of the view with that itemsData
viewHolder.namelist.setText(itemsData[position].getName());
viewHolder.numberlist.setText(itemsData[position].getNumber());
// viewHolder.imgViewIcon.setImageResource(itemsData[position].getImageUrl());
// viewHolder.imgViewIcon.setTag(new Integer(position));
}
// inner class to hold a reference to each item of RecyclerView
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public TextView namelist;
public TextView numberlist;
String name;
String number;
public ViewHolder(View itemLayoutView) {
super(itemLayoutView);
namelist = (TextView) itemLayoutView.findViewById(R.id.name);
numberlist = (TextView) itemLayoutView.findViewById(R.id.contactnumber);
//imgViewIcon = (ImageView) itemLayoutView.findViewById(R.id.item_icon);
name=namelist.getText().toString();
number=numberlist.getText().toString();
itemLayoutView.setOnClickListener(this);
}
#Override public void onClick(View view) {
}
}
public interface OnItemClickListener {
public void onItemClick(View view , int position);
}
public void SetOnItemClickListener(final OnItemClickListener mItemClickListener) {
this.mItemClickListener = mItemClickListener;
}
// Return the size of your itemsData (invoked by the layout manager)
#Override
public int getItemCount() {
return itemsData.length;
}
} //Update - Code formatting

Modify your constructor DetailAdapter as following:
public DetailAdapter(Context context, DetailModel[] itemsData) {
this.context = context;
this.itemsData = itemsData;
}
On your onClick() method in adapter add following code:
#Override
public void onClick(View view) {
int pos = getAdapterPosition();
String tempName = itemsData[pos].getName();
String tempNumber = itemsData[pos].getNumber();
Intent intent = new Intent(context, YourActivity.class);
startActivity(intent);
}

Add this on your adapter,
View.OnClickListener mOnClickListener = new OrderClickListener();
then
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.contactnamenumber, parent, false);
view.setOnClickListener(mOnClickListener);
return new ViewHolder(view);
}
now in adapter,
private class OrderClickListener implements View.OnClickListener {
#Override
public void onClick(View v) {
mOrderSelect.onOrderSelect(rvOrderHistory.getChildLayoutPosition(v));
}
}
From above steps you can get the position which item is clicked. Here you can go to next activity.