Store Selected CheckBox values in String array

Question

I have one Custom dialog box, which contanis one Recylerview + SearchView of CarBodyColorsNames. And one more thing I have adapter that have a custom row for each item. custom row consist of one Imagview(icons), TextView(colorName) and Checkbox for Selection.Its working fine but the problem is that, I want to store all the values that user has checked in String array according to its adapter position. following is my code:

edBodyColorAdapter.java

holder.checkBoxColor.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {


                if(isChecked)
                {
                    int position = holder.getAdapterPosition();
                    clickedColorNamePosition = edBodyColorArrayList.indexOf(filteredArrayList.get(position));

                    Toast.makeText(context, "current position = " + clickedColorNamePosition, Toast.LENGTH_SHORT).show();
                    String name = edBodyColorArrayList.get(clickedColorNamePosition).getBodyColorName();

                    Toast.makeText(context, "name = " + name, Toast.LENGTH_SHORT).show();


                }
                else
                {
                    Toast.makeText(context, "Unchecked", Toast.LENGTH_SHORT).show();
                }


            }
    });

Simple I want when user click on Ok button i want to pick all the selected checkbox values.

What would happen if the user presses same checkbox again then? then, in that case, you would have to remove that value String array? — Kishan Maurya
– Kishan Maurya, Commented Oct 19, 2019 at 10:04
Kishan Maurya ai have no idea about how to handel this problem. Is ArrrayList is better option. Sir plz give me solution the code....tnxs in advance — Farooq Khan
– Farooq Khan, Commented Oct 19, 2019 at 10:16
I hope it'll help you check it out: stackoverflow.com/a/36597344 — Viral Patel
– Viral Patel, Commented Oct 19, 2019 at 11:11

Kishan Maurya · Accepted Answer · 2019-10-19 10:50:09Z

Declare globally 1 Hashmap, which is used to put/remove selected/unselected value as user check/unchecked Checkbox

HashMap<Integer, String> selectionMap = new HashMap<>();

Now In your code,

holder.checkBoxColor.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
                    int position = holder.getAdapterPosition();
                    clickedColorNamePosition = edBodyColorArrayList.indexOf(filteredArrayList.get(position));
                    String name = edBodyColorArrayList.get(clickedColorNamePosition).getBodyColorName();
                //this mthod will check if selected checkbox value is already present or not. It present then remove ( means user unchecked box) and if value is not there means user has selected checkbox
                checkAndRemove(position,name);
            }
    });

This method is used to Put or remove value from hashmap.

private void checkAndRemove(int position, String name) {
        if(selectionMap.containsKey(position)){
            selectionMap.remove(position);
        }else {
            selectionMap.put(position, name);
        }
    }

Now After user click OK button then use this hashmap to get selected values. Iterate over hashmap value set then you will get All selected values.

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Store Selected CheckBox values in String array

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