Develop Reference

How to to set onClick in the RecyclerView?

I have created a RecyclerView Adapter but now i'm struggling to do the onClick to open new activity.
This is my RecyclerView Adapter class:
public class RecycleAdapter extends RecyclerView.Adapter<RecycleAdapter.ViewHolder> {
private ArrayList<HashMap<String, String>> mDataset;
Context ctx;
public RecycleAdapter(ArrayList<HashMap<String, String>> mDataset) {
this.mDataset = mDataset;
this.ctx = ctx;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_procedure, parent, false);
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.getId().setText(mDataset.get(position).get("id"));
holder.getItemname().setText(mDataset.get(position).get("name"));
//holder.getIvImage().setBackground(mDataset.get(position).get("icon"));
}
#Override
public int getItemCount() {
return mDataset.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private CardView cardView;
private TextView itemId;
private TextView tvName;
private ImageView ivImage;
public ViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(this);
itemId = itemView.findViewById(R.id.tvProfileItemName);
tvName = itemView.findViewById(R.id.tvProfileItemAge);
ivImage = itemView.findViewById(R.id.imageView3);
}
public TextView getId() {
return itemId;
}
public TextView getItemname() {
return tvName;
}
public ImageView getIvImage() {
return ivImage;
}
#Override
public void onClick(View v) {
}
}
}
My Main Activity just display the data inside of a recycler view
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
ListAdapter adapter = new SimpleAdapter(MainActivity.this, contactList,
R.layout.list_item, new String[]{"id", "name", "icon"},
new int[]{R.id.id, R.id.name, R.id.icon});
mAdapter = new RecycleAdapter(contactList);
mRecyclerView.setAdapter(mAdapter);
}

use interface
in recycler view adapter class
public interface recClick{
void onClickRec(int p);
}
private recClick rc;
public void setRecClick(recClick rc){
this.rc = rc
}
in recycler view holder class
#Override
public void onClick(View v) {
rc.onClickRec(getAdapterPosition());
}
in MainActivity use Interface
class MainActivity implements AdapterClass.recClick{
mAdapter.setRecClick(this);
#Override
public onClickRec(int p)
{
// do someting
}
}

#Override
public void onBindViewHolder(ViewHolder holder, int position) {
final int pos =position;
holder.getId().setText(mDataset.get(position).get("id"));
holder.getItemname().setText(mDataset.get(position).get("name"));
//holder.getIvImage().setBackground(mDataset.get(position).get("icon"));
holder.cardView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent=new Intent(context,NewActivity.class);
intent.putExtra("yourValue", String.valueOf(mDataset.get(position).get(pos)));
ctx.startActivity(intent);
}
});
}
Remember to give reference to your cardview
cardView = (CardView)itemView.findViewById(R.id.cardview);

android - recyclerview cannot click and get position

I have tried some code to can click recyclerview item and get position, but I can't click the recyclerview item.. the data I get from url. So I wan't switch activity with get the item user click..
how I can fix that?
this code for adapter
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
Context context;
private static final String TAG = RecyclerViewAdapter.class.getSimpleName();
List<GetDataAdapter> getDataAdapter;
ImageLoader imageLoader1;
public RecyclerViewAdapter(List<GetDataAdapter> getDataAdapter, Context context) {
super();
this.getDataAdapter = getDataAdapter;
this.context = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_items, parent, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
#Override
public void onBindViewHolder(ViewHolder Viewholder, int position) {
GetDataAdapter getDataAdapter1 = getDataAdapter.get(position);
imageLoader1 = ServerImageParseAdapter.getInstance(context).getImageLoader();
imageLoader1.get(getDataAdapter1.getImageServerUrl(),
ImageLoader.getImageListener(
Viewholder.networkImageView,//Server Image
R.mipmap.ic_launcher,//Before loading server image the default showing image.
android.R.drawable.ic_dialog_alert //Error image if requested image dose not found on server.
)
);
Viewholder.networkImageView.setImageUrl(getDataAdapter1.getImageServerUrl(), imageLoader1);
Viewholder.ImageTitleNameView.setText(getDataAdapter1.getImageTitleName());
}
#Override
public int getItemCount() {
return getDataAdapter.size();
}
class ViewHolder extends RecyclerView.ViewHolder{
public TextView ImageTitleNameView;
public NetworkImageView networkImageView;
public ViewHolder(View itemView) {
super(itemView);
ImageTitleNameView = (TextView) itemView.findViewById(R.id.textView_item);
networkImageView = (NetworkImageView) itemView.findViewById(R.id.VollyNetworkImageView1);
}
}
}
and this code for mainactivity
public class MainActivity extends AppCompatActivity {
List<GetDataAdapter> GetDataAdapter1;
RecyclerView recyclerView;
RecyclerView.LayoutManager recyclerViewlayoutManager;
RecyclerView.Adapter recyclerViewadapter;
String GET_JSON_DATA_HTTP_URL = "http://androidblog.esy.es/ImageJsonData.php";
String JSON_IMAGE_TITLE_NAME = "image_title";
String JSON_IMAGE_URL = "image_url";
JsonArrayRequest jsonArrayRequest ;
RequestQueue requestQueue ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GetDataAdapter1 = new ArrayList<>();
recyclerView = (RecyclerView) findViewById(R.id.recyclerview1);
recyclerView.setHasFixedSize(true);
recyclerViewlayoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(recyclerViewlayoutManager);
JSON_DATA_WEB_CALL();
}
public void JSON_DATA_WEB_CALL(){
jsonArrayRequest = new JsonArrayRequest(GET_JSON_DATA_HTTP_URL,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
JSON_PARSE_DATA_AFTER_WEBCALL(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
requestQueue = Volley.newRequestQueue(this);
requestQueue.add(jsonArrayRequest);
}
public void JSON_PARSE_DATA_AFTER_WEBCALL(JSONArray array){
for(int i = 0; i<array.length(); i++) {
GetDataAdapter GetDataAdapter2 = new GetDataAdapter();
JSONObject json = null;
try {
json = array.getJSONObject(i);
GetDataAdapter2.setImageTitleNamee(json.getString(JSON_IMAGE_TITLE_NAME));
GetDataAdapter2.setImageServerUrl(json.getString(JSON_IMAGE_URL));
} catch (JSONException e) {
e.printStackTrace();
}
GetDataAdapter1.add(GetDataAdapter2);
}
recyclerViewadapter = new RecyclerViewAdapter(GetDataAdapter1, this);
recyclerView.setAdapter(recyclerViewadapter);
}
}
getdataadapter
public class GetDataAdapter {
public String ImageServerUrl;
public String ImageTitleName;
public String getImageServerUrl() {
return ImageServerUrl;
}
public void setImageServerUrl(String imageServerUrl) {
this.ImageServerUrl = imageServerUrl;
}
public String getImageTitleName() {
return ImageTitleName;
}
public void setImageTitleNamee(String Imagetitlename) {
this.ImageTitleName = Imagetitlename;
}
}

You need to set onClickListener to your item view. You can do by following below steps:
Set onCLickListener to root view of your list item.
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_items, parent, false);
Add below code in onCreateViewHolder:
v.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Add your logic here
}
});
You can add listener while onBindViewHolder:
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Add your logic here
}
});
Thanks.

Put a listener on your recycler item view and then in onclick, start intent to open new activity. Pass the data object you want to pass with the intent.
//make sure your model class GetDataAdapter implements Parcelable
holder.itemView.setOnclickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(this, ActivityToOpen.class);
intent.putExtra("key",Your Object to pass);// getDataAdapter1 in your case
context.startActivity(intent);
}
});
then in your Startted activity receive your object like this
YourObject obj = getIntent().getParcelableExtra("key");
//Your case
GetDataAdapter obj = getIntent().getParcelableExtra("key");

how to sent json value to module?

i responsed json object from api and i tried to send the response to the module using setter then to the Recyclerview adapter but its not working
This is my fragment
public class ListViewActivityFragment extends Fragment {
List<AppShowModule> appShowModule;
RecyclerView AppRecyclerView;
RecyclerView.LayoutManager AppRecyclerViewlayoutManager;
RecyclerView.Adapter AppRecyclerViewadapter;
String jsonUrl = "https://itunes.apple.com/jo/rss/topfreeapplications/limit=50/json";
TextView text;
Context context;
RequestQueue requestQueue;
public ListViewActivityFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_list_view, container, false);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
appShowModule = new ArrayList<>();
AppRecyclerView = (RecyclerView) getView().findViewById( R.id.AppRecyclerView );
AppRecyclerView.setHasFixedSize( true );
AppRecyclerView.setLayoutManager( AppRecyclerViewlayoutManager );
JsonAppShowData();}
public void JsonAppShowData() {
final JsonObjectRequest jsonObjectRequest = new JsonObjectRequest( jsonUrl, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONObject("feed").getJSONArray( "entry" );
AppShowModule appShowModule111 = new AppShowModule();
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject json1 = jsonArray.getJSONObject( i ).getJSONObject("im:name");
String name = response.getJSONObject("feed").getJSONArray("entry").getJSONObject(i).getJSONObject("im:name").getString("label").toString();
appShowModule111.setAppName(name);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e( "LOG", error.toString() );
}
} );
requestQueue = Volley.newRequestQueue( getContext() );
requestQueue.add(jsonObjectRequest);
AppRecyclerView.setLayoutManager(new LinearLayoutManager(context));
AppRecyclerViewadapter = new ListViewAdapter(appShowModule,getContext() );
AppRecyclerView.setAdapter(AppRecyclerViewadapter);
}
}
And this is my adapter
public class ListViewAdapter extends RecyclerView.Adapter<ListViewAdapter.ViewHolder> {
Context context;
List<AppShowModule> getDataAdapter;
public ListViewAdapter(List<AppShowModule> getDataAdapter, Context context){
super();
this.getDataAdapter = getDataAdapter;
this.context = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.appitem, parent, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
#Override
public void onBindViewHolder(final ViewHolder holder, int position)
{
final AppShowModule getDataAdapter1 = getDataAdapter.get( position );
holder.NameTextView.setText( getDataAdapter1.getAppName() );
Picasso.with( context ).load( getDataAdapter1.getAppImageUrl() ).into( holder.imgPost );
}
#Override
public int getItemCount() {
return getDataAdapter.size();
}
class ViewHolder extends RecyclerView.ViewHolder{
public TextView NameTextView;
public ImageView imgPost;
LinearLayout lnrLayout;
public ViewHolder(View itemView) {
super(itemView);
NameTextView = (TextView) itemView.findViewById(R.id.appName);
imgPost = (ImageView) itemView.findViewById(R.id.appImage);
lnrLayout = (LinearLayout)itemView.findViewById(R.id.lnrLayout);
}
}
}
And this is my module
public class AppShowModule
{
private String appName;
private String appImageUrl;
public String getAppName() {
return appName;}
public void setAppName(String appName) {
this.appName = appName;}
public String getAppImageUrl() {
return appImageUrl;}
public void setAppImageUrl(String appImageUrl) {
this.appImageUrl = appImageUrl;}
}

I think you should not initialize your adapter when you get a response from the web service. Do it on activity create and when you get your data, update the adapter.

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*/));
}

Cardview click event is not working on android?

I show list of data in card view successfully but now i want to open another activity and show details of clicked data.
I have three class MainActivity, ContactAdapter, Contact.
Main Activity Code:
RecyclerView recyclerView;
RecyclerView.Adapter adapter;
RecyclerView.LayoutManager layoutManager;
String[] name,email;
ArrayList<Contact> list = new ArrayList<Contact>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
name = getResources().getStringArray(R.array.person_name);
email = getResources().getStringArray(R.array.person_email);
int count = 0;
for (String Name : name)
{
Contact contact = new Contact(Name,email[count]);
count++;
list.add(contact);
}
recyclerView= (RecyclerView) findViewById(R.id.recycler_view);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setHasFixedSize(true);
adapter=new ContactAdapter(list);
recyclerView.setAdapter(adapter);
i tried but it's not working.
Adapter Code:
public class ContactAdapter extends RecyclerView.Adapter<ContactAdapter.ContactViewHolder> {
ArrayList<Contact> contacts = new ArrayList<Contact>();
public ContactAdapter(ArrayList<Contact> contacts) {
this.contacts = contacts;
}
#Override
public ContactViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_view_layout, parent, false);
ContactViewHolder contactViewHolder = new ContactViewHolder(view);
return contactViewHolder;
}
#Override
public void onBindViewHolder(ContactViewHolder holder, int position) {
Contact CON = contacts.get(position);
holder.person_name.setText(CON.getName());
holder.person_email.setText(CON.getEmail());
}
#Override
public int getItemCount() {
return contacts.size();
}
public static class ContactViewHolder extends RecyclerView.ViewHolder {
TextView person_name, person_email;
public ContactViewHolder(View view) {
super(view);
person_name = (TextView) view.findViewById(R.id.person_name);
person_email = (TextView) view.findViewById(R.id.person_email);
view.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(v.getContext(), "OnClick Version :",
Toast.LENGTH_SHORT).show();
}
});
view.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
Toast.makeText(v.getContext(), "OnLongClick Version :",
Toast.LENGTH_SHORT).show();
return true;
}
});
}
}
}

In your adapter do this:
public class ProdutoAdapter extends RecyclerView.Adapter<ProdutoAdapter.ProdutoViewHolder>{
private static ProdutoAdapter.ClickListener clickListener; //this is important
private List<Produto> produtos; //this is my list of beans
public ProdutoAdapter(List<Produto> produtos) {
this.produtos = produtos;
}
#Override
public ProdutoViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.cardview_produtos, parent, false);
ProdutoViewHolder mvh = new ProdutoViewHolder(v);
return mvh;
}
#Override
public void onBindViewHolder(ProdutoViewHolder holder, int position) {
//holder.nome.setText(this.produtos.get(position).getNome());
holder.img.setImageDrawable(produtos.get(position).getImgDrawable());
holder.nome.setText(produtos.get(position).getNome());
holder.preco.setText(String.valueOf(produtos.get(position).getPreco()));
}
#Override
public int getItemCount() {
return this.produtos.size();
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
public static class ProdutoViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener{
Produto produto;
CardView cardView;
TextView nome;
TextView preco;
ImageView img;
ProdutoViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(this);
itemView.setOnLongClickListener(this);
cardView = (CardView) itemView.findViewById(R.id.cardviewProduto);
nome = (TextView) itemView.findViewById(R.id.nome);
preco = (TextView) itemView.findViewById(R.id.preco);
img = (ImageView) itemView.findViewById(R.id.foto);
}
public void setItem(Produto produto){
this.produto = produto;
}
public Produto getItem(){
return this.produto;
}
//this is what you'll need in your activity
#Override
public void onClick(View v) {
clickListener.onItemClick(getAdapterPosition(), v);
}
#Override
public boolean onLongClick(View v) {
clickListener.onItemLongClick(getAdapterPosition(), v);
return false;
}
}
public void setOnItemClickListener(ClickListener clickListener){
ProdutoAdapter.clickListener = clickListener;
}
public interface ClickListener {
void onItemClick(int position, View v);
void onItemLongClick(int position, View v);
}
}
and in your activity:
public static ProdutoAdapter mAdapter;
myActivity.mAdapter.setOnItemClickListener(new ProdutoAdapter.ClickListener() {
#Override
public void onItemClick(int position, View v) {
//do what you want
}
#Override
public void onItemLongClick(int position, View v) {
}
});
myActivity.mRecyclerView.setAdapter(mAdapter);