如何在android卡片視圖中創建彈出式菜單

Question

我想創建帶有卡片視圖上的編輯和刪除選項的彈出式菜單我已經嘗試了下面的代碼，但我在popup.show();處收到強制關閉，致命異常onclick的imageview。我應該怎麼做才能在cardview上創建彈出菜單？

public class ShipRecyclerAdapter extends RecyclerView.Adapter<ShipRecyclerAdapter.ViewHolder> { 

public static final String PRODUCTID = "PRODUCTID"; 
public static final String PRODUCTNAME = "PRODUCTNAME"; 

List<CustDatabaseModel> dbCustList; 
static Context context; 
public ImageView btndots; 

ShipRecyclerAdapter(Context context, List<CustDatabaseModel> dbCustList){ 
    this.dbCustList = new ArrayList<CustDatabaseModel>(); 
    this.context = context; 
    this.dbCustList = dbCustList; 

} 

@Override 
public ShipRecyclerAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 

    View itemLayoutView = LayoutInflater.from(parent.getContext()).inflate(
      R.layout.address_list, null); 

    // create ViewHolder 

    ViewHolder viewHolder = new ViewHolder(itemLayoutView); 
    return viewHolder; 
} 

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

    holder.address.setText(dbCustList.get(position).getaddress()); 
    holder.city.setText(dbCustList.get(position).getcity()); 
    holder.state.setText(dbCustList.get(position).getstate()); 
    holder.zipcode.setText(dbCustList.get(position).getzip()); 

    final String adr=dbCustList.get(position).getaddress().toString(); 

    holder.btndots.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(final View v) { 
      PopupMenu popup = new PopupMenu(context, btndots); 
      //Inflating the Popup using xml file 
      popup.getMenuInflater().inflate(R.menu.popup_menu, popup.getMenu()); 

      popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { 
       public boolean onMenuItemClick(MenuItem item) { 
        Intent i; 
        if ((item.getTitle().toString()).equalsIgnoreCase("Edit")) { 
         Toast.makeText(ShipRecyclerAdapter.context, "you have clicked Menu image ", Toast.LENGTH_LONG).show(); 

        } else if ((item.getTitle().toString()).equalsIgnoreCase("Delete")) { 
         Toast.makeText(ShipRecyclerAdapter.context, "you have clicked Menu image ", Toast.LENGTH_LONG).show(); 
        } 
        return true; 
       } 
      }); 

      popup.show(); 
     } 
    }); 



    //closing the setOnClickListener method 



} 

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

public class ViewHolder extends RecyclerView.ViewHolder { 

    public TextView state,address,city,zipcode; 
    public ImageView btndots; 



    public ViewHolder(View itemLayoutView) { 
     super(itemLayoutView); 
     address = (TextView) itemLayoutView.findViewById(R.id.textViewAddress); 
     city = (TextView)itemLayoutView.findViewById(R.id.textViewCity); 
     zipcode = (TextView)itemLayoutView.findViewById(R.id.textViewZipcode); 
     state = (TextView)itemLayoutView.findViewById(R.id.textViewState); 
     this.btndots = (ImageView)itemLayoutView.findViewById(R.id.cmenu); 


    } 



} 

}`

Answer 1

使用

registerForContextMenu(recyclerView); 

嘗試在OnCreate中你的活動，你先註冊上下文菜單recyclerView這個

，並創建一個像

@Override 
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) 
    { 
     super.onCreateContextMenu(menu, v, menuInfo); 
     menu.setHeaderTitle("Select The Action"); 
     menu.add(0, v.getId(), 0, "Call");//groupId, itemId, order, title 
     menu.add(0, v.getId(), 0, "SMS"); 
    } 
    @Override 
    public boolean onContextItemSelected(MenuItem item){ 
     if(item.getTitle()=="Call"){ 
      Toast.makeText(getApplicationContext(), "calling code", Toast.LENGTH_LONG).show(); 
     } 
     else if(item.getTitle()=="SMS"){ 
      Toast.makeText(getApplicationContext(),"sending sms code",Toast.LENGTH_LONG).show(); 
     }else{ 
      return false; 
     } 
     return true; 
    } 

上下文菜單

希望這有助於你

Answer 2

首先建立在這樣的菜單文件夾中的XML文件，

<?xml version="1.0" encoding="utf-8"?> 
<menu xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto"> 

    <item 
     android:id="@+id/edit" 
     android:title="@string/edit" 
     app:showAsAction="ifRoom" /> 

    <item 
     android:id="@+id/delete" 
     android:title="@string/delete" 
     app:showAsAction="ifRoom" /> 

</menu> 

然後在適配器類中創建方法，

private void showPopup(View view, final int position) { 
    // pass the imageview id 
    View menuItemView = view.findViewById(R.id.btn_song_list_more); 
    PopupMenu popup = new PopupMenu(activity, menuItemView); 
    MenuInflater inflate = popup.getMenuInflater(); 
    inflate.inflate(R.menu.popup_menu, popup.getMenu()); 
    Log.e("position -- " + position); 

    popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { 

     @Override 
     public boolean onMenuItemClick(MenuItem item) { 
      switch (item.getItemId()) { 
       case R.id.edit: 
        // do what you need. 
        break; 
       case R.id.delete: 
      // do what you need . 
        break; 
       default: 
        return false; 
      } 
      return false; 
     } 
    }); 
    popup.show(); 
} 

呼叫您的ImageView點擊這個方法事件。