Change CheckBox state on List item click?

Question

I have a list and a checkbox in every row of it. I want that whenever I click on a row, the checkbox changes its state accordingly.

checkbox.xml

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Answer 1

CheckBox checkBox = (CheckBox) v.findViewById(R.id.CheckBox);
checkBox.setChecked(true);

Answer 2

Here is the full code, you can add this after setting the addapter:

list.setOnItemClickListener(new AdapterView.OnItemClickListener(){


        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

           String message = "Item " + position;
           Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show();

            CheckBox cb = (CheckBox) view.findViewById(R.id.checkbox);
            cb.setChecked(!cb.isChecked());


        }


    });

Answer 3

Inside the onListItemClick do this:

CheckBox cb = (CheckBox) v.findViewById(R.id.CheckBox);
cb.setChecked(!cb.isChecked());

Answer 4

You need to use findViewById to get a pointer to your checkbox:

protected void onListItemClick(ListView l, View v, int position, long id) {

    Toast.makeText(getApplicationContext(), "You have selected item no."
                 +(position+1)+"", Toast.LENGTH_SHORT).show();

    super.onListItemClick(l, v, position, id);

    if (v != null) {
        CheckBox checkBox = (CheckBox)v.findViewById(R.id.Checkbox);
        checkBox.setChecked(!checkBox.isChecked());
    }
}

If you are recieving the onClick event then v should never be null but I have put on the appropriate checks.