Android RecycerView在单击时显示隐藏复选框

Question

if(show){
checkBox.setVisibility(View.VISIBLE);
}else{
checkBox.setVisibility(View.INVISIBLE);
}  

 @Override
    public void onBindViewHolder(@NonNull ExpenseVH expenseVH, int i) {
    ExpenseListModel model = arrayList.get(i);
        Log.i(TAG, "onBindViewHolder: "+ showCheck);
        expenseVH.date.setText(model.getDate());
        expenseVH.vendor.setText(model.getVendor());
        expenseVH.center.setText(model.getCenter());
        expenseVH.item.setText(model.getItem());
        expenseVH.app_amt.setText(String.format("%s %s", context.getResources().getString(R.string.Rs),model.getApp_amt()));
        expenseVH.amount.setText(String.format("%s %s", context.getResources().getString(R.string.Rs), model.getAmount()));
        expenseVH.sl.setText(String.valueOf(i + 1).concat("."));
        if(showCheck){
            expenseVH.checkBox.setClickable(true);
            expenseVH.checkBox.setVisibility(View.VISIBLE);
        }else{
            expenseVH.checkBox.setClickable(false);
            expenseVH.checkBox.setVisibility(View.INVISIBLE);

        }

ExpenseAdapter adapter = new ExpenseAdapter(this,arraylist,pos ->{
if(value){
showCheck = true;
}else{
showCheck = false;
}
},showCheck);

Answer 1

要维护任何状态，请在模型中添加一个附加属性，如下所示

class ExpenseListModel{

public boolean show;


}

然后在您的onBindViewHolder中使用

@Override
    public void onBindViewHolder(@NonNull ExpenseVH expenseVH, int i) {
    ExpenseListModel model = arrayList.get(i);
        Log.i(TAG, "onBindViewHolder: "+ showCheck);
        expenseVH.date.setText(model.getDate());
        expenseVH.vendor.setText(model.getVendor());
        expenseVH.center.setText(model.getCenter());
        expenseVH.item.setText(model.getItem());
        expenseVH.app_amt.setText(String.format("%s %s", context.getResources().getString(R.string.Rs),model.getApp_amt()));
        expenseVH.amount.setText(String.format("%s %s", context.getResources().getString(R.string.Rs), model.getAmount()));
        expenseVH.sl.setText(String.valueOf(i + 1).concat("."));
        expenseVH.checkBox.setClickable(model.show ? true : false);
        expenseVH.checkBox.setVisibility(model.show ? View.VISIBLE : VIEW.INVISIBLE);

        }

如果要更改状态，请在onclickListener中更新并调用NotifyItemChanged(position)