如何打開CardView List android上的onLongClick事件後的上下文菜單？

Question

我在RecyclerView上顯示CardView中的聯繫人列表，現在我想在打電話OnLongClick特定CardView事件時打開上下文菜單。

像編輯，刪除選項。

在CardView佈局我已經添加了兩個佈局，左側接觸顯示和右側兩個按鈕增加了不同事件處理程序處理的歷史和狀態。

如果我長按一下CardView一個彈出窗口打開，我可以編輯和刪除聯繫人，並從這些選項 - 刪除或編輯點擊事件將處理特定聯繫人。

ContactAdapter代碼：

public class ContactAdapter extends RecyclerView.Adapter<ContactAdapter.ContactViewHolder> { 
ArrayList<Contact> contacts = new ArrayList<Contact>(); 
Context ctx; 

public ContactAdapter(ArrayList<Contact> contacts,Context ctx) { 
    this.contacts = contacts; 
    this.ctx = ctx; 
} 

@Override 
public ContactViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_view_layout, parent, false); 
    ContactViewHolder contactViewHolder = new ContactViewHolder(view,ctx,contacts); 
    return contactViewHolder; 
} 

@Override 
public void onBindViewHolder(ContactViewHolder holder, int position) { 
    Contact CON = contacts.get(position); 
    holder.person_name.setText(CON.getName()); 
    holder.person_email.setText(CON.getEmail()); 
} 

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

public static class ContactViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener { 
    TextView person_name, person_email,btn_history,btn_task_update; 
    ArrayList<Contact> contacts = new ArrayList<Contact>(); 
    Context ctx; 
    CardView card_view; 

    public ContactViewHolder(View view, Context ctx ,ArrayList<Contact> contacts) { 
     super(view); 
     this.contacts=contacts; 
     this.ctx = ctx; 
     person_name = (TextView) view.findViewById(R.id.person_name); 
     person_email = (TextView) view.findViewById(R.id.person_email); 
     card_view = (CardView) view.findViewById(R.id.card_view); 
     btn_history = (TextView) view.findViewById(R.id.btn_history); 
     btn_task_update= (TextView) view.findViewById(R.id.btn_task_update); 
     card_view.setOnClickListener(this); 
     card_view.setOnLongClickListener(this); 
     btn_history.setOnClickListener(this); 
     btn_task_update.setOnClickListener(this); 
    } 

    @Override 
    public void onClick(View v) { 
     int position = getAdapterPosition(); 
     Contact contact = this.contacts.get(position); 
     if(v.getId()==R.id.card_view) { 
      Toast.makeText(this.ctx, "position Card View" + position, Toast.LENGTH_SHORT).show(); 
     } 
     else if(v.getId()==R.id.btn_history) 
     { 
      Toast.makeText(this.ctx, "position History" + position, Toast.LENGTH_SHORT).show(); 
     } 
     else if(v.getId()==R.id.btn_task_update) 
     { 
      Toast.makeText(this.ctx, "position Task Status" + position, Toast.LENGTH_SHORT).show(); 
      Intent intent = new Intent(this.ctx, task_detail.class); 
      intent.putExtra("name", contact.getName()); 
      intent.putExtra("email", contact.getEmail()); 
      this.ctx.startActivity(intent); 
     } 
    } 

    @Override 
    public boolean onLongClick(View v) { 
     int position = getAdapterPosition(); 
     Contact contact = this.contacts.get(position); 
     Toast.makeText(this.ctx, "position " + position, Toast.LENGTH_SHORT).show(); 
     return true; 
    } 
} 
} 

Answer 1

 @Override 
     public boolean onLongClick(View v) { 
      if(v.getId() == R.id.card_view) { 
       int position = getAdapterPosition(); 
       Contact contact = this.contacts.get(position); 
       showDialog(contact, new CustomActionListener() { 
        void onAction(int actionType) { 
        switch(actionType) { 
         case OPTION_EDIT : 
         //edit contact here 
         break; 
         case OPTION_DELETE : 
         //delete contact here 
         break; 
         default : 
         //On dialog dismiss - do nothing 
         break; 
        } 
        } 
       }); 
       /* show your popup dialog here, it would be good 
       if you have an interface defined for the kind of action that was performed in dialog, using that, 
       perform required action here. */ 
      } 

     return true; 
    } 

     // Your custom interface 
     public interface CustomActionListener { 
      void onAction(int actionType); 
     } 

定義與彈出窗口中的ShowDialog功能的按鈕，以完成上述僞代碼。