RecyclerView 项影响 RecyclerView 外的 TextView 的值

Question

我有一个 Activity，其中包含 2 个 TextView 显示一个数值，并且在它们下面有一个 RecyclerView，RecyclerView 有一个带有数值的 TextView 和一个 SwitchCompat，我想要如果用户将SwitchCompat 转换为ON，则RecyclerView 内的TextView 中的数字将添加到RecyclerView 之外的TextView 的数字上，并且如果SwitchCompat 切换为@ 987654334@外面的数字减去TextView的数字。

我尝试将TextView 传递给RecyclerViewAdapter 并在适配器类中使用它，但发生错误，它第一次工作正常，但是在滚动随机数时要从TextView 中添加和减去,，以下是我的代码：

AdapterClass.java

    @Override
    public void onBindViewHolder(@NonNull final ExpensesListAdapterViewHolder holder, int position) {
...
holder.switchComp.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    eList.get(holder.getAdapterPosition()).setmFlag(isChecked);

                if (isChecked) {
                    if (TextUtils.isEmpty(eList.get(holder.getAdapterPosition()).getmExpenseName())) {
                        // switch is on + Increase Budget

                        totalBudget.setText(String.valueOf(Double.parseDouble(totalBudget.getText().toString())+eList.get(holder.getAdapterPosition()).getmAmount()));
                        totalRemaining.setText(String.valueOf(Double.parseDouble(totalRemaining.getText().toString())+eList.get(holder.getAdapterPosition()).getmAmount()));

                    } else if (TextUtils.isEmpty(eList.get(holder.getAdapterPosition()).getmI_B_Name())) {
                        // switch is on + expense

                        totalExpense.setText(String.valueOf(Double.parseDouble(totalExpense.getText().toString())+eList.get(holder.getAdapterPosition()).getmAmount()));
                        totalRemaining.setText(String.valueOf(Double.parseDouble(totalRemaining.getText().toString())-eList.get(holder.getAdapterPosition()).getmAmount()));

                    }

                } else {

                    if (TextUtils.isEmpty(eList.get(holder.getAdapterPosition()).getmExpenseName())) {
                        // switch is off + increase budget

                        totalBudget.setText(String.valueOf(Double.parseDouble(totalBudget.getText().toString())-eList.get(holder.getAdapterPosition()).getmAmount()));
                        totalRemaining.setText(String.valueOf(Double.parseDouble(totalRemaining.getText().toString())-eList.get(holder.getAdapterPosition()).getmAmount()));


                    } else if (TextUtils.isEmpty(eList.get(holder.getAdapterPosition()).getmI_B_Name())) {
                        // switch is off + expense

                        totalExpense.setText(String.valueOf(Double.parseDouble(totalExpense.getText().toString())-eList.get(holder.getAdapterPosition()).getmAmount()));
                       totalRemaining.setText(String.valueOf(Double.parseDouble(totalRemaining.getText().toString())+eList.get(holder.getAdapterPosition()).getmAmount()));

                    }
                }

Answer 1

您应该尝试使用一个函数来更新 textview 的值，就像每次检查一个视图时一样：

   @Override
public void onBindViewHolder(@NonNull final ExpensesListAdapterViewHolder holder, int position) {


    holder.switchComp.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            eList.get(holder.getAdapterPosition()).setmFlag(isChecked);

            updateTotalValues();

        }
    }
    }
}

您的更新函数应该如下所示（将 object 替换为您的真实对象名称）：

public void updateTotalValues(){
Double sumRemaining = 0d;
Double sumBudget = 0d;
Double sumExpense = 0d;

for(eList e : List<Object>){
    boolean isChecked = e.getmFlag;

    if (isChecked) {
        if (TextUtils.isEmpty(e.getmExpenseName())) {
            // switch is on + Increase Budget
            sumBudget+= e.getmAmount();
            sumRemaining+= e.getmAmount();

        } else if (TextUtils.isEmpty(e.getmI_B_Name())) {
            // switch is on + expense
            sumExpense+=e.getmAmount();
            sumRemaining+= e.getmAmount();
        }

    } else {

        if (TextUtils.isEmpty(e.getmExpenseName())) {
            // switch is off + increase budget
            sumBudget+= e.getmAmount();
            sumRemaining-= e.getmAmount();

        } else if (TextUtils.isEmpty(e.getmI_B_Name())) {
            // switch is off + expense
            sumExpense-=e.getmAmount();
            sumRemaining+= e.getmAmount();

        }
}

totalBudget.setText(sumBudget);
totalRemaining.setText(sumRemaining);
totalExpense.setText(sumExpense);

}