Firebase Datenbank: nicht in der Lage, die Firebase Datenbank Android

Question

Ich möchte löschen Sie den Wert aus der Listenansicht extrahieren, die es in Abfragezeile passieren

public boolean onContextItemSelected(MenuItem item) { 
     AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo(); 


     Toast.makeText(Weekly_update.this,item.getTitle(),Toast.LENGTH_LONG).show(); 
     switch (item.getItemId()) { 
      case R.id.delete: 

       final AlertDialog dialog = new AlertDialog.Builder(this) 
         .setTitle("R u sure??") 
         .setView(R.layout.custom_dialog_delete) 
         .create(); 

       dialog.show(); 

       Button b=(Button)dialog.findViewById(R.id.cdb2); 

       b.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View view) { 


         DatabaseReference ref = FirebaseDatabase.getInstance().getReference(); 

         //i want to get the xxx from the listview when i press the screen 
         Query applesQuery = ref.child("WEEK WORK").orderByChild("date").equalTo("xxxxx"); 


         applesQuery.addListenerForSingleValueEvent(new ValueEventListener() { 
          @Override 
          public void onDataChange(DataSnapshot dataSnapshot) { 
           for (DataSnapshot appleSnapshot: dataSnapshot.getChildren()) { 

            appleSnapshot.getRef().removeValue(); 


           } 
          } 

          @Override 
          public void onCancelled(DatabaseError databaseError) { 
           Log.e("fail 123..", "onCancelled", databaseError.toException()); 
          } 
         }); 



         dialog.dismiss(); 

        } 

       }); 
      default: 
       return super.onContextItemSelected(item); 
     } 

Answer 1

Sie den folgenden Code hinzu:

databaseReference = FirebaseDatabase.getInstance().getReference().child("question"); 

keyValues.get(position) gibt mich Titel der Frage

databaseReference.child(keyValues.get(position)).removeValue();