リサイクルカードビューでアイテムクリックをポップアップする方法は？

Question

これは私がポップアップメニューを取得するにはonclick機能を設定していますが、いずれかが、私はポップアップメニューのレイアウトが表示されますholder.cartクリックでこれを解決することができ、私はライン

PopupMenu popup = new PopupMenu(mContext, view); 
showPopupMenu(holder.cart); 

でnullポインタ例外を取得していますが、holder.cartに私のコードですここで私はmenuinflaterを使っていました。レイアウトインフレータに変更し、ポップアップビューを表示したいと思います。

import android.content.Context; 
import android.support.v7.widget.PopupMenu; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.graphics.Typeface; 
import android.view.MenuInflater; 
import android.support.v7.app.AlertDialog; 
import android.support.v7.widget.RecyclerView; 
import android.view.LayoutInflater; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.EditText; 
import android.widget.ImageButton; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 

import java.util.ArrayList; 


public class RecyclerAdapterProducts extends RecyclerView.Adapter<RecyclerAdapterProducts.ViewHolder> { 
    //ArrayList<Products> products; 
    OnItemClickListener clickListener; 
    ArrayList<ImageAndName> imageAndNames; 
    private Context mContext; 
    //byte[] imz; 

    public RecyclerAdapterProducts(ArrayList<ImageAndName> imageAndNames){ 
     this.imageAndNames=imageAndNames; 
     //this.discounts=discounts; 
    } 

    /*public SimpleRecyclerAdapter(ArrayList<Products> products){ 
     this.products=products; 
    }*/ 

    class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener { 
     // each data item is just a string in this case 
     /*public TextView name,offer; 
     public TextView price;*/ 
     public ImageView im; 
     public TextView name; 
     public TextView part; 
     public ImageButton cart; 
     public int position; 

     public ViewHolder(View v) { 
      super(v); 
      name = (TextView)v.findViewById(R.id.code); 
      part = (TextView)v.findViewById(R.id.textView11); 
      part.setTypeface(null, Typeface.BOLD_ITALIC); 
      im = (ImageView)v.findViewById(R.id.productImg); 
      v.setOnClickListener(this); 
      cart = (ImageButton)v.findViewById(R.id.imageView2); 

      /*cart.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
*/ 
        /*// LayoutInflater inflater = LayoutInflater.from(RecyclerAdapterProducts.this); 
        View popupView = LayoutInflater.from(mContext).inflate(R.layout.quantityalertdialog, null); 
        final EditText subEditText = (EditText)popupView.findViewById(R.id.dialogEditText); 

        AlertDialog.Builder builder = new AlertDialog.Builder(mContext); 
     *//*builder.setTitle("AlertDialog"); 
     builder.setMessage("AlertDialog Message");*//* 
        builder.setView(popupView); 
        AlertDialog alertDialog = builder.create(); 

        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() { 
         @Override 
         public void onClick(DialogInterface dialog, int which) { 
          dialog.dismiss(); 
         } 
        }); 

        builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
         @Override 
         public void onClick(DialogInterface dialog, int which) { 
          dialog.dismiss(); 
         } 
        }); 

        builder.show();*/ 

        //View popupView = LayoutInflater.from(mContext).inflate(R.layout.quantityalertdialog, null); 
      /* } 
      });*/ 
      //price = (TextView)v.findViewById(R.id.serviceDate); 

      //offer=(TextView)v.findViewById(R.id.offer); 

     } 



     @Override 
     public void onClick(View v) { 
      clickListener.onItemClick(v, getAdapterPosition()); 
     } 
    } 

    public RecyclerAdapterProducts(Context mContext, ArrayList<ImageAndName> imageAndNames) { 
     this.mContext = mContext; 
     this.imageAndNames = imageAndNames; 
    } 
    @Override 
    public RecyclerAdapterProducts.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View v = LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.recycler_card_individual_product, parent, false); 
     ViewHolder vh = new ViewHolder(v); 
     return vh; 
    } 

    @Override 
    public void onBindViewHolder(final RecyclerAdapterProducts.ViewHolder holder,int position) { 
     holder.im.setImageResource(imageAndNames.get(position).getIconImageResource()); 
     holder.name.setText(imageAndNames.get(position).getName()); 
     holder.part.setText(imageAndNames.get(position).getPartno()); 
     holder.cart.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       showPopupMenu(holder.cart); 
      } 
     }); 
     holder.position=position; 

    } 

    private void showPopupMenu(View view) { 
     // inflate menu 
     PopupMenu popup = new PopupMenu(mContext, view); 
     MenuInflater inflater = popup.getMenuInflater(); 
     inflater.inflate(R.menu.menu_album, popup.getMenu()); 
     popup.setOnMenuItemClickListener(new MyMenuItemClickListener()); 
     popup.show(); 
    } 

    class MyMenuItemClickListener implements PopupMenu.OnMenuItemClickListener { 

     public MyMenuItemClickListener() { 
     } 

     @Override 
     public boolean onMenuItemClick(MenuItem menuItem) { 
      switch (menuItem.getItemId()) { 
       case R.id.action_add_favourite: 
        Toast.makeText(mContext, "Add to Wishlist", Toast.LENGTH_SHORT).show(); 
        return true; 
       case R.id.action_play_next: 
        //Toast.makeText(mContext, "Play next", Toast.LENGTH_SHORT).show(); 
        return true; 
       default: 
      } 
      return false; 
     } 
    } 
     /*final Products pd= products.get(position); 
     if (discounts!=null && discounts.size()>0) { 
      for (int i = 0; i < discounts.size(); i++) { 
       if (pd.getId().equals(((ArrayList)discounts.get(i)).get(0))){ 
        ArrayList disc=(ArrayList)discounts.get(i); 
        holder.offer.setVisibility(View.VISIBLE); 
        holder.offer.setText("Buy "+disc.get(1)+" to get "+disc.get(2)+"% discount"); 
       } 
       else { 
        holder.offer.setVisibility(View.GONE); 
       } 
      } 
     } 
     holder.name.setText(pd.getName()); 
     holder.position=position; 
     holder.price.setText(pd.getList_price() + "\u20B9"); 
     if (pd.getId()!=null) { 

      new AsyncTask<Integer, Void, ImageModel>() { 
       private ViewHolder v; 
       private ImageModel img; 
       @Override 
       protected ImageModel doInBackground(Integer... params) { 
        //v = params[0]; 
        final String url = "http://164.164.35.38:443/seis/productTemplateController/getProductImage/"+params[0]; 
        RestTemplate restTemplate = new RestTemplate(); 
        restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter()); 
        img = restTemplate.getForObject(url, ImageModel.class); 
        //byte[] ing= 
        return img; 
       } 

       @Override 
       protected void onPostExecute(final ImageModel result) { 
        //super.onPostExecute(result);.get(0).toString().getBytes() 
        if (result != null && result.getImage()!=null) { 
         //imz=result.get(0).toString().getBytes(); 
         // If this item hasn't been recycled already, hide the 
         // progress and set and show the image 
         new AsyncTask<ViewHolder, Void, Bitmap>() { 
          private ViewHolder v; 

          @Override 
          protected Bitmap doInBackground(ViewHolder... params) { 
           v = params[0]; 
           Bitmap bm = BitmapFactory.decodeByteArray(android.util.Base64.decode(result.getImage(), 0), 0, android.util.Base64.decode(result.getImage(), 0).length); 
           return bm; 
          } 

          @Override 
          protected void onPostExecute(Bitmap result) { 
           super.onPostExecute(result); 
           if (v.position == position) { 
            // If this item hasn't been recycled already, hide the 
            // progress and set and show the image 
            v.im.setImageBitmap(result); 
           } 
          } 
         }.execute(holder); 
         //v.im.setImageBitmap(result); 
        } 
       } 
      }.execute(pd.getId()); 
     }*/ 


    @Override 
    public int getItemCount() { 
     return imageAndNames.size(); 
    } 
    public interface OnItemClickListener { 
     public void onItemClick(View view, int position); 
    } 

    public void SetOnItemClickListener(final OnItemClickListener itemClickListener) { 
     this.clickListener = itemClickListener; 
    } 
} 

Answer 1

xmlファイルを使用せずにこれらのオプションをプログラムで追加することができます。これが役立つかもしれません。

ここで、ONEとTWOは、ポップアップメニューで指定しているオプションのインデックスを表示しています（実際にはint値です）。以下のような）

1等の第二位の第一位置EDITのPOSTは、POSTを削除するにholder.cartに以下のように開いているポップアップメニューをクリックしてください：コードの上

private final static int ONE = 1; 
private final static int TWO = 2; 


PopupMenu popupMenu = new PopupMenu(this, findViewById(R.id.img_detail_information_options)); 
popupMenu.getMenu().add(Menu.NONE, ONE, Menu.NONE, getResources().getString(R.string.detail_information_edit_post)); 
popupMenu.getMenu().add(Menu.NONE, TWO, Menu.NONE, getResources().getString(R.string.detail_information_remove_post)); 
popupMenu.setOnMenuItemClickListener(this); 
popupMenu.show(); 

をこのようなポップアップが表示されます： - Screenshot