通過「位置」執行RecyclerView項目上的點擊事件

Question

我在RecyclerView的適配器中。

從onBindViewHolder（）我能夠執行RecyclerView行（ViewHolder的項目）onClick事件。

是否可以使用Position來調用onClick（）？

Answer 1

你可以做這樣的事情

適配器：

public class OffersAdapter extends RecyclerView.Adapter<OffersAdapter.ViewHolder> { 
    private List<Offer> mDataset; 
    private OffersListner mListener; 

    public OffersAdapter(List<Offer> response) { 
     mDataset = response; 
    } 

    public void setListener(OffersListner listener) { 
     mListener = listener; 
    } 

    @Override 
    public int getItemViewType(int position) { 
     return position; 
    } 

    @Override 
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_row_offers, parent, false); 
     return new ViewHolder(v); 
    } 

    @Override 
    public void onBindViewHolder(ViewHolder holder, int position) { 
     final int pos = getItemViewType(position); 

     holder.mLayout.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       mListener.onOfferChoice(mDataset.get(pos)); 
      } 
     }); 
    } 

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

    public interface OffersListner { 
     void onOfferChoice(Offer offer); 
    } 

    public static class ViewHolder extends RecyclerView.ViewHolder { 
     @BindView(R.id.item_offers_layout) 
     LinearLayout mLayout; 

     public ViewHolder(View itemView) { 
      super(itemView); 
      ButterKnife.bind(this, itemView); 
     } 
    } 
} 

活動：

public class OffersSelectActivity extends BaseEventActivity implements OffersAdapter.OffersListner { 
. 
. 
. 

    private void setOffers(List<Offer> offers) { 
     OffersAdapter mAdapter = new OffersAdapter(offers); 
     mAdapter.setListener(this); 

     mOffers.setHasFixedSize(true); 
     mOffers.setLayoutManager(new LinearLayoutManager(this)); 
     mOffers.setAdapter(mAdapter); 
    } 



    @Override 
    public void onOfferChoice(Offer offer) { 
     Intent intent = new Intent(this, OfferActivity.class); 
     intent.putExtra(Constants.EXTRA_OFFER_ID, offer.id); 
     intent.putExtra(Constants.EXTRA_OFFER_NAME, offer.name); 
     startActivity(intent); 
    } 
} 

Answer 2

這裏是例子：

public class NavigationDrawerAdapter extends RecyclerView.Adapter<NavigationDrawerAdapter.MyViewHolder> { 
List<Pojo_menu> data; 

public NavigationDrawerAdapter(Context mContext, List<Pojo_menu> data) { 
    this.data = data; 
} 

public class MyViewHolder extends RecyclerView.ViewHolder { 

    TextView title, tv_count; 
    RelativeLayout mRelativeLayout; 
    private SparseBooleanArray selectedItems = new SparseBooleanArray(); 

    public MyViewHolder(View itemView) { 
     super(itemView); 
     title = (TextView) itemView.findViewById(R.id.item_name); 
     tv_count = (TextView) itemView.findViewById(R.id.tv_count); 
     mRelativeLayout = (RelativeLayout) itemView.findViewById(R.id.my_nav_menu); 

    } 

} 

public NavigationDrawerAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View itemView = LayoutInflater.from(parent.getContext()) 
      .inflate(R.layout.nav_drawer_row, parent, false); 
    return new NavigationDrawerAdapter.MyViewHolder(itemView); 
} 

public void onBindViewHolder(NavigationDrawerAdapter.MyViewHolder holder, int position) { 
    Pojo_menu current = data.get(position); 
    String count = current.getCount(); 
    holder.tv_count.setText(count); 
    holder.title.setText(current.getName()); 
    holder.title.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

     } 
    }); 
} 

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

} 

Answer 3

只需設置onClickListener到支架

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

     holder.setOnClickListner(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       // to the thing you want refer to the position by holder.getAdapterPosition() 
     } 
     };) 
    } 

它不推薦，因爲你必須聲明它final直接使用position。因此，在提及onClick時，請使用holder.getAdapterPosition()代替。