微调框选择的值未上载到Firebase数据库

Question

我正在制作一个购物应用程序，我想将微调器的选定值上传到我的数据库中。该值正在上载到数据库，但不是正确的值，即正在上载。这是我的代码。

mySpinner = (Spinner) findViewById(R.id.spinner1);


    ArrayAdapter<String> myAdapter = new ArrayAdapter<String>(getApplicationContext(),
            android.R.layout.simple_list_item_1, getResources().getStringArray(R.array.names));
    myAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    mySpinner.setAdapter(myAdapter);
    selectedValue = mySpinner.getSelectedItem().toString();

...

private void addingToCartList()
{
    String saveCurrentTime, saveCurrentDate;

    Calendar calForDate = Calendar.getInstance();
    SimpleDateFormat currentDate = new SimpleDateFormat("MMM dd, yyyy");
    saveCurrentDate = currentDate.format(calForDate.getTime());
    SimpleDateFormat currentTime = new SimpleDateFormat("HH:mm:ss a");
    saveCurrentTime = currentTime.format(calForDate.getTime());

    final DatabaseReference cartListRef = FirebaseDatabase.getInstance().getReference().child("Cart List");

    final HashMap<String, Object> cartMap = new HashMap<>();
    cartMap.put("pid", productID);
    cartMap.put("pname", productName.getText().toString());
    cartMap.put("price", productPrice.getText().toString());
    cartMap.put("date", saveCurrentDate);
    cartMap.put("time", saveCurrentTime);
    cartMap.put("quantity", selectedValue);
    cartMap.put("discount", "");
    cartListRef.child("User View").child(Prevelant.currentOnlineUser.getUsername())
            .child("Products").child(productID)
            .updateChildren(cartMap)
            .addOnCompleteListener(new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task)
                {
                    if(task.isSuccessful())
                    {
                        cartListRef.child("Admin View").child(Prevelant.currentOnlineUser.getUsername())
                                .child("Products").child(productID)
                                .updateChildren(cartMap)
                                .addOnCompleteListener(new OnCompleteListener<Void>() {
                                    @Override
                                    public void onComplete(@NonNull Task<Void> task)
                                    {
                                        if(task.isSuccessful())
                                        {
                                            Toast.makeText(ProductDetails2Activity.this, "Added to Cart List", Toast.LENGTH_SHORT).show();
                                            Intent intent = new Intent (ProductDetails2Activity.this, CartActivity.class);
                                            startActivity(intent);
                                        }
                                    }
                                });
                    }
                }
            });
}

每次上传到数据库的值是250

我想解决这个问题...

Answer 1

我认为您应该在用户单击“提交”之后获得选定的项目，但是您甚至在他进行更改之前就已经获得了该值，因此默认情况下它将采用第一个

private void addingToCartList()
{
String saveCurrentTime, saveCurrentDate;

Calendar calForDate = Calendar.getInstance();
SimpleDateFormat currentDate = new SimpleDateFormat("MMM dd, yyyy");
saveCurrentDate = currentDate.format(calForDate.getTime());
SimpleDateFormat currentTime = new SimpleDateFormat("HH:mm:ss a");
saveCurrentTime = currentTime.format(calForDate.getTime());

//putting spinner here
selectedValue = mySpinner.getSelectedItem().toString();

final DatabaseReference cartListRef = FirebaseDatabase.getInstance().getReference().child("Cart List");

final HashMap<String, Object> cartMap = new HashMap<>();
cartMap.put("pid", productID);
cartMap.put("pname", productName.getText().toString());
cartMap.put("price", productPrice.getText().toString());
cartMap.put("date", saveCurrentDate);
cartMap.put("time", saveCurrentTime);
cartMap.put("quantity", selectedValue);
cartMap.put("discount", "");
cartListRef.child("User View").child(Prevelant.currentOnlineUser.getUsername())
        .child("Products").child(productID)
        .updateChildren(cartMap)
        .addOnCompleteListener(new OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task)
            {
                if(task.isSuccessful())
                {
                    cartListRef.child("Admin View").child(Prevelant.currentOnlineUser.getUsername())
                            .child("Products").child(productID)
                            .updateChildren(cartMap)
                            .addOnCompleteListener(new OnCompleteListener<Void>() {
                                @Override
                                public void onComplete(@NonNull Task<Void> task)
                                {
                                    if(task.isSuccessful())
                                    {
                                        Toast.makeText(ProductDetails2Activity.this, "Added to Cart List", Toast.LENGTH_SHORT).show();
                                        Intent intent = new Intent (ProductDetails2Activity.this, CartActivity.class);
                                        startActivity(intent);
                                    }
                                }
                            });
                }
            }
        });
}

我希望这行得通 Lemme知道它是否有效