java - 更新 firebase realtimeDatabase 但在 BottomDialog Fragment ？以及在 Material Toggle 组按钮中

Question

我为 BottomDialogFragment 编写了一个代码，但问题是当有人选择 10₹ 时，程序会像循环一样运行并不断从他的钱包中减去钱，直到它变为0。

主要问题是当用户单击连续执行的加入但我从未使用循环代码时请解决此问题我无法弄清楚问题

这是我的BottomRedFragment.java

public class BottomRedFragment extends BottomSheetDialogFragment {

    FragmentBottomRedBinding binding;
    ProgressDialog progressDialog;

//    FirebaseDatabase firebaseDatabase;
//    DatabaseReference databaseReference;
//    DatabaseReference price;

    int quantity = 1;
    String coin;
    int icoin = 0;
    String mobile;

    int ivalue;
    int tcmoney;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        binding = FragmentBottomRedBinding.inflate(inflater, container, false);
        View view = binding.getRoot();
        String qty = String.valueOf(quantity);
        binding.quantityRed.setText(qty);

        mobile = getActivity().getIntent().getStringExtra("mobile");

        progressDialog = new ProgressDialog(getActivity());
        progressDialog.setTitle("Joining Red");
        progressDialog.setMessage("Please Wait");

        MaterialButtonToggleGroup toggleGroup = binding.toggleButton;
        int buttonId = toggleGroup.getCheckedButtonId();
        MaterialButton button = toggleGroup.findViewById(buttonId);
        toggleGroup.addOnButtonCheckedListener(new MaterialButtonToggleGroup.OnButtonCheckedListener() {
            @Override
            public void onButtonChecked(MaterialButtonToggleGroup group, int checkedId, boolean isChecked) {

                if (group.getCheckedButtonId() == R.id.btn1) {

                    icoin = 10;
                    int ten = icoin * quantity;
                    coin = String.valueOf(ten);
                    binding.totalPriceMoney.setText(coin);
                } else if (group.getCheckedButtonId() == R.id.btn2) {

                    icoin = 50;
                    int fifty = icoin * quantity;
                    coin = String.valueOf(fifty);
                    binding.totalPriceMoney.setText(coin);
                } else if (group.getCheckedButtonId() == R.id.btn3) {

                    icoin = 100;
                    int hundred = icoin * quantity;
                    coin = String.valueOf(hundred);
                    binding.totalPriceMoney.setText(coin);
                } else {
                    Toast.makeText(getActivity(), "Please Choose a valid amount", Toast.LENGTH_SHORT).show();
                }
            }
        });
        binding.subtractRed.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                decrement();
            }
        });
        binding.addRed.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                increment();
            }
        });

        binding.joinRed.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                tcmoney = Integer.parseInt(binding.totalPriceMoney.getText().toString());
                if (tcmoney == 0 || icoin == 0) {
                    Toast.makeText(getActivity(), "Please choose Correct Values", Toast.LENGTH_SHORT).show();

                } else {
                    progressDialog.show();
                    progressDialog.setCanceledOnTouchOutside(false);
                    joinVerify();
                }
            }
        });

        return view;
    }

    private void joinVerify() {
        Toast.makeText(getContext(), mobile, Toast.LENGTH_SHORT).show();

        DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Users").child(mobile).child("wallet");
        databaseReference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {
                String value = snapshot.getValue(String.class);
                ivalue = Integer.parseInt(value);

                if (tcmoney > ivalue) {
                    progressDialog.dismiss();
                    Toast.makeText(getContext(), "Insufficient Funds", Toast.LENGTH_LONG).show();
                } else {
                    int ijoin = ivalue - tcmoney;
                    String join = String.valueOf(ijoin);

                    databaseReference.setValue(join);
                    Toast.makeText(getActivity(), "Joined Successfully", Toast.LENGTH_SHORT).show();
                    progressDialog.dismiss();


                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError error) {
            }
        });


    }

    private void increment() {
        quantity++;
        String s = String.valueOf(quantity);
        binding.quantityRed.setText(s);

        int calc = icoin * quantity;
        coin = String.valueOf(calc);
        binding.totalPriceMoney.setText(coin);

    }

    private void decrement() {
        quantity = quantity > 1 ? --quantity : 1;
        String s = String.valueOf(quantity);
        binding.quantityRed.setText(s);

        int calc = icoin * quantity;
        coin = String.valueOf(calc);
        binding.totalPriceMoney.setText(coin);

    }

} 

这是我的fragment_bottom_red.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    tools:context=".Fragments.BottomRedFragment">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:background="@color/red_a700"
            android:fontFamily="@font/poppins"
            android:gravity="center"
            android:text="red"
            android:textAllCaps="true"
            android:textColor="@color/white"

            android:textSize="30sp" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:background="@color/white"
            android:gravity="center"
            android:text="CONTRACT MONEY"
            android:textColor="@color/red_a700"
            android:textSize="30dp"
            android:textStyle="bold" />

        <com.google.android.material.button.MaterialButtonToggleGroup
            android:id="@+id/toggleButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginTop="30dp"
            app:singleSelection="true">

            <Button
                android:id="@+id/btn1"
                style="?attr/materialButtonOutlinedStyle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:focusable="true"
                android:text="₹10"
                android:textColor="@color/red_a700" />

            <Button
                android:id="@+id/btn2"
                style="?attr/materialButtonOutlinedStyle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="₹50"
                android:textColor="@color/red_a700" />

            <Button
                android:id="@+id/btn3"
                style="?attr/materialButtonOutlinedStyle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="₹100"
                android:textColor="@color/red_a700" />

        </com.google.android.material.button.MaterialButtonToggleGroup>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:gravity="center"
            android:orientation="horizontal">

            <Button
                android:id="@+id/subtractRed"
                android:layout_width="wrap_content"
                android:layout_height="75dp"
                android:layout_marginEnd="30dp"
                android:backgroundTint="@color/red_a700"
                android:text="-"
                android:textColor="@color/white"
                android:textSize="30dp" />

            <TextView
                android:id="@+id/quantityRed"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:text="1"
                android:textColor="@color/black"
                android:textSize="60sp" />

            <Button
                android:id="@+id/addRed"
                android:layout_width="wrap_content"
                android:layout_height="75dp"
                android:layout_marginStart="30dp"
                android:backgroundTint="@color/red_a700"
                android:text="+"
                android:textColor="@color/white"
                android:textSize="30dp" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:gravity="center_horizontal"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="20dp"
                android:text="Total order money is ₹&quot;
                android:textColor="@color/black"
                android:textSize="20sp" />

            <TextView
                android:id="@+id/totalPriceMoney"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="20dp"
                android:text="0"
                android:textAlignment="center"
                android:textColor="@color/black"
                android:textSize="20sp" />
        </LinearLayout>

        <Button
            android:id="@+id/joinRed"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="20dp"
            android:backgroundTint="#B71C1C"
            android:fontFamily="@font/aladin"
            android:paddingStart="50dp"
            android:paddingTop="10dp"
            android:paddingEnd="50dp"
            android:paddingBottom="10dp"
            android:text="Join"
            android:textColor="@color/white"
            android:textSize="20sp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginTop="20dp"
            android:textColor="@color/black"
            android:layout_marginBottom="30dp"
            android:fontFamily="@font/poppins"
            android:text="By clicking JOIN Button you \n agree to our presale rule"
            android:textSize="16sp"
            android:textStyle="bold" />
    </LinearLayout>

</FrameLayout>

标签： javaandroidfirebasefirebase-realtime-databaseandroid-togglebutton

Answer 1

每次更新实时数据库中的值时，OnDataChange() 都会继续调用。

binding.joinRed.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                tcmoney = Integer.parseInt(binding.totalPriceMoney.getText().toString());
                if (tcmoney == 0 || icoin == 0) {
                    Toast.makeText(getActivity(), "Please choose Correct Values", Toast.LENGTH_SHORT).show();

                } else {
                    progressDialog.show();
                    progressDialog.setCanceledOnTouchOutside(false);
                    joinVerify(true);
                }
            }
        });



private void joinVerify(Boolean isJoined) {
        Toast.makeText(getContext(), mobile, Toast.LENGTH_SHORT).show();

        DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Users").child(mobile).child("wallet");
        databaseReference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {
                String value = snapshot.getValue(String.class);
                ivalue = Integer.parseInt(value);

                if (tcmoney > ivalue) {
                    progressDialog.dismiss();
                    Toast.makeText(getContext(), "Insufficient Funds", Toast.LENGTH_LONG).show();
                } else {
                    if(isJoined){
                         int ijoin = ivalue - tcmoney;
                        String join = String.valueOf(ijoin);

                        databaseReference.setValue(join);
                        Toast.makeText(getActivity(), "Joined Successfully", Toast.LENGTH_SHORT).show();
                        progressDialog.dismiss();

                        isJoined = false

                    }
                   


                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError error) {
            }
        });


    }