fetching checkbox state in a gridview item for all checkbox in gridview on button click

Question

I have the code below, now I need to keep track of the checkbox state in each gridview item, and fetch that info on a button click to update the information. My button event in the calling activity of imageadapter for a gridview.

    public View getView(int position, View convertView, ViewGroup parent)
    {
        ViewHolder holder;
        ImageView imgView = null;

            if (convertView == null) {

                holder = new ViewHolder(); 
                LayoutInflater ltInflate = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE ); 
                convertView = ltInflate.inflate(R.layout.griditem, null);

                holder.textview1 = (TextView) convertView.findViewById(R.id.grid_item_alert_date);
                holder.textview2 = (TextView) convertView.findViewById(R.id.grid_item_alert_time);
                holder.textview3 = (TextView) convertView.findViewById(R.id.grid_item_alert_type);

                holder.imageview    = (ImageView) convertView.findViewById(R.id.grid_item_image);
                holder.checkbox = (CheckBox) convertView.findViewById(R.id.checkbox_ack);
                convertView.setTag(holder);

            }
            else
            {   
                holder = (ViewHolder) convertView.getTag();
            }

            holder.checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

                  @Override
                  public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked)
                {

                    //Accessing or saving position to a List doesn't work here

                    //How to add ? info to a list here...

                }

                  } });

            holder.textview1.setText("Text 1 ");
            holder.textview2.setText("Text 2 ");
            holder.textview3.setText("Text 3 ");
            holder.checkbox.setChecked(false);
            holder.imageview.setImageBitmap(bitmap);
            holder.id = position;

            return convertView;
    }

In the activity:

private OnClickListener UpdateButtonListener =
            new OnClickListener(){
            public void onClick(View v)
            {
            //CheckBox ckbocx = (CheckBox) findViewById(R.id.checkbox_ck);
                        //Need info on all the checkboxes for each gridview item

    };

Any clues, hints are more than welcome.

you want to updated checked value on particular button click, right? — RobinHood, Oct 10 '12 at 05:13
@RobinHood thanks for your msg. No only one button for all the checkboxes checked. The button just gets list of the checkboxes which are active/checked and does work based on this info. — AliR, Oct 10 '12 at 05:15
the button needs to get the info only about all the checkboxes it doesn't interacts (checked/unchecked). So I can't seem to find a way to get info about all the checkboxes. — AliR, Oct 10 '12 at 05:48
come here http://chat.stackoverflow.com/rooms/5098/android-people — RobinHood, Oct 10 '12 at 05:54

score 4 · Accepted Answer · edited May 23 '17 at 10:24

Deal with integer array to store the state of your checkboxes when it checked/unchecked, Initially fill the array with 0 values which indicate unchecked of your checkboxes like this.

int[] checkStates;
 checkStates = new int[datalist.length()];
   for (int i = 0; i < datalist.length(); i++) {
        checkStates[i] = 0;
   }

Now handle checkboxes click event to get perfect position. use settag & get gettag and inside click event when box get selected change the value of particular position to 1 from 0.

Like this#

  checkbox.setTag(position);



    checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

        public void onCheckedChanged(CompoundButton buttonView,
                boolean isChecked) {
            pos = (Integer) buttonView.getTag();
            // checkStates[pos] = 1;
            // pos = (Integer) v.getTag();

            if (!buttonView.isChecked()) {
                boxState[pos] = 0;
            } else {
                boxState[pos] = 1;
            }
            notifyDataSetChanged();
        }
    });

and inside getview method handle your check/uncheck state this way..

if (checkStates[position] == 0) {
            checkbox.setChecked(false); // set unchecked"
        } else {
            checkbox.setChecked(true); // set checked"
        }

This way you will get the info of checkboxes which are selected, further handle your button click event, and get the int array which filled while check and uncheck.

this "checkbox.setOnClickListener(new OnClickListener() {" is not working for me it has only checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if(isChecked) — AliR, Oct 10 '12 at 06:22
ok thanks RobinHood, but how can I move this array to the parent activity — AliR, Oct 10 '12 at 06:44
@Adil Soomro added at the chat window:"You can get it using yourAdapter.getCheckStateArray();, make sure to write this method in your Adapter and there you will return your Adapter's array from that method." — AliR, Oct 10 '12 at 07:27

fetching checkbox state in a gridview item for all checkbox in gridview on button click

1 Answers1

Linked