java - onitemtouchlistener - recyclerview onitemclicklistener example in android

onClickListener en RecyclerView.ViewHolder

Question

Tengo un RecyclerView.ViewHolder y RecyclerView.Adapter, lo necesito después de hacer clic en el elemento y luego enviar información sobre este elemento a otra Activity .

PlacesAdapter.java

public class PlacesAdapter extends RecyclerView.Adapter<PlacesViewHolder> {
private PlacesActivity placesActivity;
Context context;
private int position;
List<Places> places;
public PlacesAdapter(List<Places> places) {
this.places = places;}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
@Override
public PlacesViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.places_view, viewGroup, false);
PlacesViewHolder pvh = new PlacesViewHolder(v);
return pvh;
}
@Override
public void onBindViewHolder(PlacesViewHolder personViewHolder, int i) {
personViewHolder.name.setText(places.get(i).name);
personViewHolder.address.setText(places.get(i).address);
Picasso.with(personViewHolder.itemView.getContext())
.load(places.get(i).photo)
.into(personViewHolder.getPhoto());
}
@Override
public int getItemCount() {
return places.size();
}
}

PlacesViewHolder.java

En esta línea "intent.putExtra(PlacesDetail.PLACES_NAME,);" ¿Cómo puedo enviar un nombre?

 public class PlacesViewHolder extends RecyclerView.ViewHolder {
CardView cv;
public TextView name;
public TextView address;
public ImageView photo;
public PlacesViewHolder(final View itemView) {
super(itemView);
cv = (CardView)itemView.findViewById(R.id.cv);
name = (TextView)itemView.findViewById(R.id.person_name);
address = (TextView)itemView.findViewById(R.id.person_age);
photo = (ImageView)itemView.findViewById(R.id.person_photo);
itemView.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
Context context = v.getContext();
Intent intent = new Intent(context, PlacesDetail.class);
intent.putExtra(PlacesDetail.PLACES_NAME,);
context.startActivity(intent);
}
});
}
public TextView getAddress() {
return address;
}
public TextView getName() {
return name;
}
public ImageView getPhoto() {
return photo;
}
}

Answer 1

Este es el ejemplo completo de Adaptador personalizado en el que puedo obtener detalles de artículos en particular. En MainActivity necesitas configurar el adaptador:

adapter = new MyAdapter(getApplicationContext(), account_no, title, aFN1, aLN1,aFN2, aLN2,aFN3, aLN3,isavilable,waitlist,flag);
adapter.notifyDataSetChanged();
mRecyclerView.setAdapter(adapter);

Ahora vea el código para el Adaptador personalizado:

 public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
String TAG = "MyAdapter";
Context context;
private String[] accountNo;
private String[] title;
private String[] afn1;
private String[] aln1;
private String[] afn2;
private String[] aln2;
private String[] afn3;
private String[] aln3;
private String[] isAvailable;
private String[] waitlist;
private int flag;
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView account_no,title,afn1,afn2,aln1,aln2,color,is_available;
private ImageView img_android;
CardView cardView;
public ViewHolder(CardView v) {
super(v);
account_no = (TextView)v.findViewById(R.id.acctno);
title = (TextView)v.findViewById(R.id.title);
afn1 = (TextView) v.findViewById(R.id.afn1);
cardView = v;
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(Context context, String[] accountNo,String[] title,String[] afn1,String[] aln1,String[] afn2,String[] aln2,String[] afn3,String[] aln3,String[] isAvailable, String[] waitlist,int flag) {
this.context = context;
this.accountNo = accountNo;
this.title = title;
this.afn1 = afn1;
this.aln1 = aln1;
this.afn2 = afn2;
this.aln2 = aln2;
this.afn3 = afn3;
this.aln3 = aln3;
this.isAvailable = isAvailable;
this.waitlist = waitlist;
this.flag = flag;
Log.d(TAG,afn1.toString() +aln1+afn2+aln2+afn3+aln3.toString()+waitlist);
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
CardView cv = (CardView) LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item, parent, false);
return new ViewHolder(cv);
}
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
final CardView cardView = holder.cardView;
final TextView accountno = (TextView)cardView.findViewById(R.id.acctno);
accountno.setText(accountNo[position]);
final TextView titletxt = (TextView)cardView.findViewById(R.id.title);
titletxt.setText(title[position]);
final TextView afn1txt = (TextView) cardView.findViewById(R.id.afn1);
afn1txt.setText(afn1[position]+" "+aln1[position]);
Log.d(TAG,waitlist[position]);
cardView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int id = getItemViewType(position);
SharedPreferences sharedPreferences = context.getSharedPreferences(Constant.MYPREFERENCE,Context.MODE_PRIVATE);
SharedPreferences.Editor edit = sharedPreferences.edit();
edit.putString(Constant.ACCOUNT,accountNo[position]);
edit.putString(Constant.TITLE,title[position]);
edit.putString(Constant.AFN1,afn1[position]);
edit.putString(Constant.ALN1,aln1[position]);
edit.putString(Constant.AFN2,afn2[position]);
edit.putString(Constant.ALN2,aln2[position]);
edit.putString(Constant.AFN3,afn3[position]);
edit.putString(Constant.ALN3,aln3[position]);
edit.putBoolean(Constant.IS_AVAILABLE, Boolean.parseBoolean(isAvailable[position].toUpperCase()));
edit.putString(Constant.WAITLIST,waitlist[position]);
Log.d("WaitingNo2 :",""+String.valueOf(waitlist[position]));
edit.commit();
Intent intent = new Intent(v.getContext(), DetailsActivity.class);
v.getContext().startActivity(intent);
}
});
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return accountNo.length;
}
}

Después de Todo lo que obtiene el valor de sharedPreferences en la Actividad que se llama en Card Click:

preferences = getSharedPreferences("myshared", Context.MODE_PRIVATE);
AccountNo = sharedPreferences.getString(Constant.ACCOUNT,null).toUpperCase();
title = sharedPreferences.getString(Constant.TITLE,null).toUpperCase();
afn1 = sharedPreferences.getString(Constant.AFN1,null).toUpperCase();
aln1 = sharedPreferences.getString(Constant.ALN1,null).toUpperCase();
afn2 = sharedPreferences.getString(Constant.AFN2,null).toUpperCase();
aln2 = sharedPreferences.getString(Constant.ALN2,null).toUpperCase();
afn3 = sharedPreferences.getString(Constant.AFN3,null).toUpperCase();
aln3 = sharedPreferences.getString(Constant.ALN3,null).toUpperCase();
isAvailable = sharedPreferences.getBoolean(Constant.IS_AVAILABLE,isAvailable);
waitlist = sharedPreferences.getString(Constant.WAITLIST,waitlist);

Ahora haz lo que quieras y disfruta el código.

Answer 2

Puede lograrlo creando una interfaz dentro de su adaptador para un itemclicklistener y luego puede configurar onItemClickListener desde su PlacesActivity .

En algún lugar dentro de su PlacesAdapter necesitaría lo siguiente:

private onRecyclerViewItemClickListener mItemClickListener;
public void setOnItemClickListener(onRecyclerViewItemClickListener mItemClickListener) {
this.mItemClickListener = mItemClickListener;
}
public interface onRecyclerViewItemClickListener {
void onItemClickListener(View view, int position, String places_name);
}

Luego, dentro de su ViewHolder (que he agregado como clase interna dentro de mi adaptador), debe aplicar el oyente a los componentes en los que desea que el usuario haga clic, así:

class PlacesViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
PlacesViewHolder(View view) {
super(view);
view.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (mItemClickListener != null) {
mItemClickListener.onItemClickListener(v, getAdapterPosition(), PlacesDetail.PLACES_NAME);
}
}
}

Este ejemplo muestra un onClickListener aplicado a la vista dentro de PlacesViewHolder .

recyclerView.setAdapter(adapter);// set adapter on recyclerview
adapter.notifyDataSetChanged();// Notify the adapter
adapter.setOnItemClickListener(new PlacesAdapter.onRecyclerViewItemClickListener() {
@Override
public void onItemClickListener(View view, int position, String places_name) {
//perform click logic here (places_name is passed)
}
});

Para implementar este código, debe setOnItemClickListener a su adaptador dentro de PlacesActivity como se muestra arriba.

Answer 3

prueba esto, es correcto para mí

Crea una nueva clase y este código

public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;
public interface OnItemClickListener {
public void onItemClick(View view, int position);
public void onLongItemClick(View view, int position);
}
GestureDetector mGestureDetector;
public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener) {
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
@Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && mListener != null) {
mListener.onLongItemClick(child, recyclerView.getChildAdapterPosition(child));
}
}
});
}
@Override public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
View childView = view.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
return true;
}
return false;
}
@Override public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) { }
@Override
public void onRequestDisallowInterceptTouchEvent (boolean disallowIntercept){}
} 

Y en su Actividad, agregue esto a la implementación de su adaptador

mRecyclerView.addOnItemTouchListener(
new RecyclerItemClickListener(getActivity(), mRecyclerView, new RecyclerItemClickListener.OnItemClickListener() {
@Override
public void onItemClick(View view, int position) {
// do something
}
}
}
@Override
public void onLongItemClick(View view, int position) {
// do whatever
}
})
);