firebaseuiによって提供されるrecyclerviewアイテムのコンテキストメニューの使用方法

Question

FirebaseUIによって提供されるrecyclerviewアイテム内にコンテキストメニューを配置し、アイテムが長押しされたことを知るいくつかのアクションを実行する方法を知りたいと思います。なぜなら、ホルダークラスのonCreateContextMenuを使用しようとすると、私のContextMenuInfoにnull値が来るからです。

public class PlayerHolder extends RecyclerView.ViewHolder implements View.OnCreateContextMenuListener { 
    //private static final String TAG = PlayerHolder.class.getSimpleName(); 
    public TextView playerName; 
    public TextView playerAge; 

    public PlayerHolder(View itemView) { 
     super(itemView); 
     playerName = (TextView) itemView.findViewById(R.id.player_name); 
     playerAge = (TextView) itemView.findViewById(R.id.player_age); 
     itemView.setOnCreateContextMenuListener(this); 
    } 

    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { 
     menu.add(0, 1, 0, "Edit");//groupId, itemId, order, title 
     menu.add(0, 2, 0, "Share"); 
     menu.add(0, 3, 0, "Delete"); 
    } 

    //@Override 
    public boolean onContextItemSelected(MenuItem item) { 
     AdapterView.AdapterContextMenuInfo info = (AdapterView .AdapterContextMenuInfo) item.getMenuInfo(); 
     switch (item.getItemId()) { 
      case 1: 
       //editNote(info.id); 
       return true; 
      case 2: 
       //shareNote(info.id); 
       return true; 
      case 3: 
       //deleteNote(info.id); 
       return true; 
      default: 
       //return super.onContextItemSelected(item); 
       return false; 
     } 
    } 
} 

、これは私がこの記事で使用することで、このソリューションをこの問題を解決した

public class PlayerAdapter extends FirebaseRecyclerAdapter<Player, PlayerHolder> { 

    private static final String TAG = PlayerAdapter.class.getSimpleName(); 
    private Context context; 

    public PlayerAdapter(Class<Player> modelClass, int modelLayout, Class<PlayerHolder> viewHolderClass, DatabaseReference ref, Context context) { 
     super(modelClass, modelLayout, viewHolderClass, ref); 
     this.context = context; 
    } 

    @Override 
    protected void populateViewHolder(PlayerHolder viewHolder, Player model, int position) { 

     viewHolder.playerName.setText(model.getName()); 
     viewHolder.playerAge.setText(String.valueOf(playerAge) + " Years"); 
    } 
} 

Answer 1

私firebaseuiリサイクルアダプタクラスである：ここ は私のホルダークラスです。ここ How to create context menu for recycleview

私のコードは

MessageViewHolderクラス：

public static class MessageViewHolder extends RecyclerView.ViewHolder implements View.OnCreateContextMenuListener { 
     public TextView tvMessage; 
     public TextView tvDateSending; 
     public CircleImageView ivMessenger; 
     public LinearLayout linearLayout; 


     public MessageViewHolder(View v) { 
      super(v); 
      tvMessage = (TextView) itemView.findViewById(R.id.tvMessage); 
      tvDateSending = (TextView) itemView.findViewById(R.id.tvDateSending); 
      ivMessenger = (CircleImageView) itemView.findViewById(R.id.ivMessenger); 
      linearLayout= (LinearLayout) itemView.findViewById(R.id.llOneToOneChat); 
      v.setOnCreateContextMenuListener(this); 

     } 
     public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { 
      menu.add(0,1 , 0, "Edit"); 
      menu.add(0, COPY, 0, "Copy"); 
      menu.add(0, DELETE, 0, "Delete"); 
     } 

    } 

MessageAdapterクラス：それはあなたのために働くホープ

@Override 
    public boolean onContextItemSelected(MenuItem item) { 
     int position = -1; 
     try { 
      position = messageAdapter.getPosition(); 
     } catch (Exception e) { 
//   Log.d(TAG, e.getLocalizedMessage(), e); 
      return super.onContextItemSelected(item); 
     } 
     switch (item.getItemId()) { 
      case 1: 
       // do your stuff 

       break; 
      case 2: 
       // copy message 
       if (position!= -1){ 
        ClipboardManager clipboard = (ClipboardManager) OneToOneConversationActivity.this.getSystemService(Context.CLIPBOARD_SERVICE); 
        String text = messageAdapter.getItem(position).getMessage(); 
        ClipData clip = android.content.ClipData.newPlainText("Copied Text", text); 
        clipboard.setPrimaryClip(clip); 

       } 

       break; 
      case 3: 
       //delete message 
       if (position!= -1) 
        messageAdapter.getRef(position).removeValue(); 
       break; 
     } 
     return super.onContextItemSelected(item); 
    } 

：断片/アクティビティで最後に

public class MessageAdapter extends FirebaseRecyclerAdapter<Message, MessageViewHolder>{ 

     private Context context; 
     private long prevMessageTime=0; 
     public int position; 

     public int getPosition() { 
      return position; 
     } 

     public void setPosition(int position) { 
      this.position = position; 
     } 

     public MessageAdapter(Class<Message> modelClass, int modelLayout, Class<MessageViewHolder> viewHolderClass, DatabaseReference ref, Context context) { 
      super(modelClass, modelLayout, viewHolderClass, ref); 
      this.context = context; 
     } 

     @Override 
     protected void populateViewHolder(MessageViewHolder viewHolder, Message message, final int position) { 
      //do something 
      viewHolder.tvMessage.setOnLongClickListener(new View.OnLongClickListener() { 
       @Override 
       public boolean onLongClick(View v) { 
        setPosition(position); 
        return false; 
       } 

      }); 
     } 
    } 

は、下のようがをonContextItemSelected上書き！