Android Recycler anzeigen Adapter

Question

Ich baue eine RecyclerView meine Array-Liste darzustellen, ich tue das auf Klick Zuhörer gemacht, aber wenn ich die onClick Methode implementiert ich kann meiner Ansicht aktualisieren von dort |. Und hier ist mein RecyclerView Adapter

public class FeedRecyclerAdapter extends RecyclerView.Adapter<FeedRecyclerAdapter.ViewHolder> { 
    public static ArrayList<FeedObject> feedObjectArrayList; 

    @Override 
    public FeedRecyclerAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.feeditemlayout, parent, false); 
     ViewHolder viewHolder = new ViewHolder(v); 
     v.setLayoutParams(new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)); 
     return viewHolder; 
    } 


    @Override 
    public void onBindViewHolder(final FeedRecyclerAdapter.ViewHolder holder, int position) { 

     final FeedObject feedObject = feedObjectArrayList.get(position); 


     holder.likeFeedItemTV.setText(feedObject.getNumAgree() + ""); 
     holder.dislikeFeedItemTV.setText(feedObject.getNumDisAgree() + ""); 
     holder.commentFeedItemTV.setText(feedObject.getNumComments() + ""); 
     holder.mediaFeedItemTV.setText(feedObject.getMediaSize() + ""); 


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

    public FeedRecyclerAdapter(ArrayList<FeedObject> feedObjectArrayList) { 
     this.feedObjectArrayList = feedObjectArrayList; 
    } 


    public static class ViewHolder extends RecyclerView.ViewHolder implements OnClickListener { 
     private ImageView likeFeedItem, profileImageView, likeFeedItemIV, dislikeFeedItem, commentFeedItem, mediaFeedItem; 
     private TextView personName, personDetails, cat_Info_Feed_Item, descriptionFeedItemTV, likeFeedItemTV, dislikeFeedItemTV, commentFeedItemTV, mediaFeedItemTV, agreeFeed, disagreeFeed, commentFeed, mediaFeed; 
     private ImageButton moreOption; 
     private Button seeMore; 

     public ViewHolder(View itemView) { 
      super(itemView); 

      likeFeedItemTV = (TextView) itemView.findViewById(R.id.likeFeedItemTV); 
      dislikeFeedItemTV = (TextView) itemView.findViewById(R.id.dislikeFeedItemTV); 
      commentFeedItemTV = (TextView) itemView.findViewById(R.id.commnetFeedItemTV); 
      mediaFeedItemTV = (TextView) itemView.findViewById(R.id.mediaFeedItemTV); 

      likeFeedItem = (ImageView) itemView.findViewById(likeFeedItemIB); 
      dislikeFeedItem = (ImageView) itemView.findViewById(dislikeFeedItemIV); 
      commentFeedItem = (ImageView) itemView.findViewById(commentFeedItemIV); 
      mediaFeedItem = (ImageView) itemView.findViewById(mediaFeedItemIV); 
      agreeFeed = (TextView) itemView.findViewById(agreeFeedTV); 
      disagreeFeed = (TextView) itemView.findViewById(disagreeFeedTV); 
      commentFeed = (TextView) itemView.findViewById(commentFeedTV); 
      mediaFeed = (TextView) itemView.findViewById(commentFeedTV); 


      likeFeedItem.setOnClickListener(this); 
      dislikeFeedItem.setOnClickListener(this); 
      commentFeedItem.setOnClickListener(this); 
      mediaFeedItem.setOnClickListener(this); 
      agreeFeed.setOnClickListener(this); 
      disagreeFeed.setOnClickListener(this); 
      commentFeed.setOnClickListener(this); 
      mediaFeed.setOnClickListener(this); 

      seeMore = (Button) itemView.findViewById(seeMoreFeedItemTV); 
      moreOption = (ImageButton) itemView.findViewById(moreFeedItemIB); 
      seeMore.setOnClickListener(this); 
      moreOption.setOnClickListener(this); 
      itemView.setOnClickListener(this); 


     } 

     public boolean onMenuItemClick(MenuItem item) { 
      switch (item.getItemId()) { 


       default: 
        return false; 
      } 
     } 

     @Override 
     public void onClick(View v) { 
      final FeedObject feedObject = feedObjectArrayList.get(getAdapterPosition()); 

      switch (v.getId()) { 
       case moreFeedItemIB: 
        PopupMenu popupMenu = new PopupMenu(v.getContext(), v); 
        MenuInflater menuInflater = popupMenu.getMenuInflater(); 
        menuInflater.inflate(R.menu.feeditemmenu, popupMenu.getMenu()); 
        popupMenu.show(); 
        break; 
       case likeFeedItemIB: 
       case agreeFeedTV: 
        new AsyncTask() { 
         @Override 
         protected Object doInBackground(Object[] params) { 
          Boolean b=feedObject.isAgree(); 
          if (b != null) { 
           if (b) { 
            feedObject.setAgree(null); 
            feedObject.setNumAgree(feedObject.getNumAgree() - 1); 
           } else { 
            feedObject.setAgree(true); 
            feedObject.setNumAgree(feedObject.getNumAgree() + 1); 
            feedObject.setNumDisAgree(feedObject.getNumDisAgree() - 1); 
           } 
          } else { 
           feedObject.setAgree(true); 
           feedObject.setNumAgree(feedObject.getNumAgree() + 1); 
          } 

          return null; 
         } 


        }.execute(); 

        //here is my problem i can't update my view 
        break; 
       case dislikeFeedItemIV: 
       case disagreeFeedTV: 
        new AsyncTask() { 
         @Override 
         protected Object doInBackground(Object[] params) { 
          Boolean c=feedObject.isAgree(); 
          if (c != null) { 
           if (c) { 
            feedObject.setAgree(false); 

            feedObject.setNumAgree(feedObject.getNumAgree() - 1); 
            feedObject.setNumDisAgree(feedObject.getNumDisAgree()+ 1); 
           } else { 
            feedObject.setAgree(null); 
            feedObject.setNumAgree(feedObject.getNumAgree() - 1); 

           } 
          } else { 
           feedObject.setAgree(false); 
           feedObject.setNumDisAgree(feedObject.getNumDisAgree() + 1); 
          } 
          return null; 
         } 
        }.execute(); 

        break; 
       case seeMoreFeedItemTV: 
       case commentFeedItemIV: 
       case commentFeedTV: 
        v.getContext().startActivity(new Intent(v.getContext(),DetailedFeed.class)); 

        break; 
       case mediaFeedItemIV: 
       case mediaFeedTV: 
        break; 


      } 


     } 




    } 
} 

Answer 1

Gibt es einen Grund, warum Sie Ihren ViewHolder statisch gemacht haben? Wenn Sie das Statische entfernen, können Sie dann innerhalb des Adapters notifyItemChanged(getAdapterPosition()); anrufen, um Ihre Ansicht zu aktualisieren. Dann können Sie die Statik Ihres ViewHolders entfernen, indem Sie sie von Ihrem feedObjectArrayList entfernen.

Wenn Sie es statisch behalten möchten, können Sie eine neue Klasse erstellen, die OnClickListener im Adapter implementiert und an den ViewHolder in onBindViewHolder weiterleitet.

Als eine Randnotiz muss ich sagen, dass onClick-Methode ein Albtraum für die Lesbarkeit ist und ich würde es persönlich in separate Klassen für jeden Fall teilen, den Sie dort haben.