RecyclerView with recyclerView with ActivityOnresult

Question

私は、別のrecyclerview（B）を含むリサイクラービュー（A）を持っています。 recyclerview（A）アイテムのプラスアイコンをクリックすると、recyclerview（C）で新しいアクティビティが開きます。長く押すと、いくつかの項目を選択し、完了をクリックします。これは、私がplusアイコンをクリックしたrecyclerview（A）アイテムのrecyclerview（B）を更新する必要があります。

代わりに、recyclerview（B）を含むrecyclerview（A）のすべての項目が更新されています。

private void displayUpcomingEvents(View view) { 
    upcomingEventsArrayList = new ArrayList<>(); 
    upcomingEvents = new UpcomingEvents("Meet and greet", "Coffee Connect | ", "Phython", "21 - ", "Jun - ", "22", "Jun", "21 Jun 10 AM", "Washinton"); 
    upcomingEventsArrayList.add(upcomingEvents); 
    upcomingEvents = new UpcomingEvents("Meet and greet", "Coffee Connect | ", "Phython", "21 - ", "Jun - ", "22", "Jun", "21 Jun 10 AM", "Washinton"); 
    upcomingEventsArrayList.add(upcomingEvents); 
    upcomingEvents = new UpcomingEvents("Meet and greet", "Coffee Connect | ", "Phython", "21 - ", "Jun - ", "22", "Jun", "21 Jun 10 AM", "Washinton"); 
    upcomingEventsArrayList.add(upcomingEvents); 
    upcomingEventsAdapter = new RecyclerAdapterUpcomingEvents(getContext(), upcomingEventsArrayList); 

    recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view_upcoming_event); 

    RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getAppContext()); 
    recyclerView.setLayoutManager(mLayoutManager); 
    recyclerView.setHasFixedSize(true); 
    recyclerView.setAdapter(upcomingEventsAdapter); 

} 



class RecyclerAdapterUpcomingEvents extends RecyclerView.Adapter<RecyclerAdapterUpcomingEvents.MyViewHolder> { 

    private List<UpcomingEvents> upcomingEventsList; 
    private Context context; 
    private LayoutInflater inflater; 


    RecyclerAdapterUpcomingEvents(Context context, List<UpcomingEvents> upcomingEventsList) { 
     this.context = context; 
     this.upcomingEventsList = upcomingEventsList; 
     inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

    @Override 
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 

     View rootView = inflater.inflate(R.layout.card_view_upcoming_event, parent, false); 
     return new RecyclerAdapterUpcomingEvents.MyViewHolder(rootView); 
    } 

    @Override 
    public void onBindViewHolder(MyViewHolder holder, int position) { 

     UpcomingEvents upcomingEvents = upcomingEventsList.get(position); 

     holder.eventUpcomingName.setText(upcomingEvents.getEventUpcomingName()); 
     holder.eventUpcomingType.setText(upcomingEvents.getEventUpcomingType()); 
     holder.eventUpcomingDate.setText(upcomingEvents.getEventUpcomingDateStart() + upcomingEvents.getEventUpcomingDateEnd()); 
     holder.eventUpcomingMonth.setText(upcomingEvents.getEventUpcomingMonthEnd() + upcomingEvents.getEventUpcomingMonthEnd()); 
     holder.eventUpcomingAlarmNotify.setText(upcomingEvents.getEventUpcomingAlarmNotify()); 
     holder.eventUpcomingPlace.setText(upcomingEvents.getEventUpcomingPlace()); 

     holder.eventUpcomingAddPeople.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Activity origin = (Activity) context; 
       origin.startActivityForResult(new Intent(getAppContext(), ContactsActivity.class), CONTACT_CODE); 
      } 
     }); 


     holder.contactRecyclerView.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)); 
     contactAdapter = new ContactAdapter(getAppContext(), R.layout.card__contact_image, contactsList);`enter code here` 
     holder.contactRecyclerView.setAdapter(contactAdapter); 

    } 


    @Override 
    public int getItemCount() { 
     return upcomingEventsList.size(); 
    } 

    class MyViewHolder extends RecyclerView.ViewHolder { 

     private TextView eventUpcomingName, eventUpcomingType, eventUpcomingDate, eventUpcomingMonth, eventUpcomingAlarmNotify, eventUpcomingPlace, eventUpcomingYes, eventUpcomingInterested, eventUpcomingNo; 
     private ImageView eventUpcomingAddPeople, eventUpcomingmore; 
     private RecyclerView contactRecyclerView; 


     MyViewHolder(View itemView) { 
      super(itemView); 
      eventUpcomingName = (TextView) itemView.findViewById(R.id.event_name); 
      eventUpcomingType = (TextView) itemView.findViewById(R.id.event_type); 
      eventUpcomingDate = (TextView) itemView.findViewById(R.id.event_date); 
      eventUpcomingMonth = (TextView) itemView.findViewById(R.id.event_month); 

      eventUpcomingAlarmNotify = (TextView) itemView.findViewById(R.id.event_time_notify); 
      eventUpcomingPlace = (TextView) itemView.findViewById(R.id.event_place); 

      eventUpcomingYes = (TextView) itemView.findViewById(R.id.event_yes); 
      eventUpcomingInterested = (TextView) itemView.findViewById(R.id.event_interested); 
      eventUpcomingNo = (TextView) itemView.findViewById(R.id.event_no); 

      eventUpcomingmore = (ImageView) itemView.findViewById(R.id.event_more); 
      eventUpcomingAddPeople = (ImageView) itemView.findViewById(R.id.hex_one_event); 

      contactRecyclerView = (RecyclerView) itemView.findViewById(R.id.upcome_events_recycler); 

     } 
    } 
} 



@Override 
public void onReceived(int requestCode, int resultCode, Intent data) { 

    if (requestCode == CONTACT_CODE && resultCode == RESULT_OK && data != null) { 

     List<Contact> contactsLists = (ArrayList<Contact>) data.getSerializableExtra("contacts"); 
     contactsList.clear(); 
     contactsList.addAll(contactsLists); 

     contactAdapter.setContactList(contactsLists); 

     upcomingEventsAdapter = new RecyclerAdapterUpcomingEvents(getContext(), upcomingEventsArrayList); 
     RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getAppContext()); 
     recyclerView.setLayoutManager(mLayoutManager); 
     recyclerView.setHasFixedSize(true); 
     recyclerView.setAdapter(upcomingEventsAdapter); 
    } 
} 

CardView

 <android.support.v7.widget.RecyclerView 
      android:id="@+id/upcome_events_recycler" 
      android:layout_width="match_parent" 
      android:layout_height="52dp" 
      android:layout_below="@id/event_place" 
      android:layout_marginBottom="8dp" 
      android:layout_marginEnd="52dp" 
      android:layout_marginStart="8dp" 
      android:layout_marginTop="8dp"> 

     </android.support.v7.widget.RecyclerView> 

     <ImageView 
      android:id="@+id/hex_one_event" 
      android:layout_width="48dp" 
      android:layout_height="48dp" 
      android:layout_alignParentEnd="true" 
      android:layout_below="@id/event_place" 
      android:layout_margin="8dp" 
      android:src="@drawable/hex_src_plus" /> 

Answer 1

まず下記これにより、あなたのコードを変更：あなたはDoneをクリックしたときにそのような何かを持っている必要があり二活性に

holder.eventUpcomingAddPeople.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Activity origin = (Activity) context; 
      Intent i = new Intent(getAppContext(), ContactsActivity.class); 
      i.putExtra("selectedPosition", position); 
      origin.startActivityForResult(i, CONTACT_CODE); 
     } 
    }); 

@Override 
public void onReceived(int requestCode, int resultCode, Intent data) { 

if (requestCode == CONTACT_CODE && resultCode == RESULT_OK && data != null) { 
    int result = data.getIntExtra("selectedPosition","put a default value in case of null"); 
    List<Contact> contactsLists = (ArrayList<Contact>) data.getSerializableExtra("contacts"); 
    contactsList.clear(); 
    contactsList.addAll(contactsLists); 

    contactAdapter.setContactList(contactsLists); 
    upcomingEventsAdapter.notifyItemChanged(result); 
} 
} 

：

int param = getIntent().getIntExtra("selectedPosition"); 
Intent resultIntent = new Intent(); 
resultIntent.putExtra("contacts", Your selected contacts); 
resultIntent.putExtra("selectedPosition", param); 

setResult(RESULT_OK, resultIntent); 
finish(); 

はそれを明確にし、