Dodaj przycisk Usuń w RecyclerView

Question

Próbuję dodać przycisk usuwania, który ma usunąć element w bazie danych w oparciu o pozycję, która ma w RecyclerView. Walczę z tym. Oto mój plik układ dla RecyclerView:

<TextView 
    android:id="@+id/layout_list_name" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentStart="true" 
    android:layout_alignParentLeft="true" 
    android:layout_alignParentTop="true" 
    android:textStyle="bold" 
    android:textAppearance="?android:attr/textAppearanceLarge" /> 

<TextView 
    android:id="@+id/layout_list_date" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignStart="@+id/layout_list_name" 
    android:layout_alignLeft="@+id/layout_list_name" 
    android:layout_below="@+id/layout_list_name" /> 

<ImageButton 
    android:id="@+id/layout_list_delete" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentTop="true" 
    android:layout_alignParentRight="true" 
    android:layout_alignParentEnd="true" 
    android:contentDescription="Delete" 
    android:src="@drawable/icon_layout_delete_layout_item" /> 

To gdzie ja zadeklarować onItemClick dla ImageButton która jest przycisk kasowania:

imageButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      Toast.makeText(getBaseContext(), "Delete hit!", Toast.LENGTH_SHORT).show(); 
     } 
    }); 

To moja klasa RecyclerView słuchacz:

private OnItemClickListener onItemClickListener; 

public interface OnItemClickListener { 
    void onItemClick(View view, int position); 
} 

GestureDetector gestureDetector; 

public ListsDatabaseItemListener(Context context, OnItemClickListener listener) { 
    onItemClickListener = listener; 
    gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() { 
     @Override 
     public boolean onSingleTapUp(MotionEvent motionEvent) { 
      return true; 
     } 
    }); 
} 

@Override 
public boolean onInterceptTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) { 
    View view = recyclerView.findChildViewUnder(motionEvent.getX(), motionEvent.getY()); 

    if (view != null && onItemClickListener != null && gestureDetector.onTouchEvent(motionEvent)) { 
     onItemClickListener.onItemClick(view, recyclerView.getChildLayoutPosition(view)); 

     return true; 
    } 
    return false; 
} 

@Override 
public void onTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) { 

} 

@Override 
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) { 

} 

Na koniec moja klasa adaptera:

List<ListsDatabaseList> list; 

public ListsDatabaseListAdapter(List<ListsDatabaseList> list) { 
    this.list = list; 
} 

@Override 
public ListsDatabaseListHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_list, parent, false); 
    ListsDatabaseListHolder holder = new ListsDatabaseListHolder(view); 

    return holder; 
} 

@Override 
public void onBindViewHolder(ListsDatabaseListHolder holder, int position) { 
    holder.name.setText(list.get(position).getName()); 
    holder.date.setText(list.get(position).getDate()); 
} 

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

public static class ListsDatabaseListHolder extends RecyclerView.ViewHolder { 
    TextView name; 
    TextView date; 
    ImageButton delete; 

    public ListsDatabaseListHolder(View view) { 
     super(view); 

     this.name = (TextView) view.findViewById(R.id.layout_list_name); 
     this.date = (TextView) view.findViewById(R.id.layout_list_date); 
     this.delete = (ImageButton) view.findViewById(R.id.layout_list_delete); 
    } 
} 

Wszelkie sugestie, jak to osiągnąć?

Answer 1

Możesz dodać ImageButton kliknij słuchacza w sposób onBindViewHolder():

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

    holder.name.setText(list.get(position).getName()); 
    holder.date.setText(list.get(position).getDate()); 

    holder.delete.setOnClickListener(new View.OnClickListener() { 
      public void onClick(View v) { 
       ListsDatabaseList theRemovedItem = list.get(position); 
       // remove your item from data base 
       list.remove(position); // remove the item from list 
       notifyItemRemoved(position); // notify the adapter about the removed item 
      } 
    }); 
}