Selecting All Items in a Listview on checkbox select

Question

I am using simple listView with simple_list_item_multiple_choice I have added a checkbox and on its checked event want all list items to get selected

Answer 1

Select all / Deselect all / Inverse all

For Activity

@Override
public boolean onOptionsItemSelected(MenuItem item) {
	// Handle action bar item clicks here. The action bar will
	// automatically handle clicks on the Home/Up button, so long
	// as you specify a parent activity in AndroidManifest.xml.
	int id = item.getItemId();

	if (id == R.id.action_select_all) {
		for(int i=0; i < lvDownload.getChildCount(); i++){
			LinearLayout itemLayout = (LinearLayout)lvDownload.getChildAt(i);
			CheckBox cb = (CheckBox)itemLayout.findViewById(R.id.cbFileDownload);
			cb.setChecked(true);
		}
		return true;
	} else if (id == R.id.action_deselect_all) {
		for(int i=0; i < lvDownload.getChildCount(); i++){
			LinearLayout itemLayout = (LinearLayout)lvDownload.getChildAt(i);
			CheckBox cb = (CheckBox)itemLayout.findViewById(R.id.cbFileDownload);
			cb.setChecked(false);
		}
		return true;
	} else if (id == R.id.action_inverse_all) {
		for(int i=0; i < lvDownload.getChildCount(); i++){
			LinearLayout itemLayout = (LinearLayout)lvDownload.getChildAt(i);
			CheckBox cb = (CheckBox)itemLayout.findViewById(R.id.cbFileDownload);
			cb.setChecked(!cb.isChecked());
		}
		return true;
	}

	return super.onOptionsItemSelected(item);
}

lvDownload - ListView ID LinearLayout or RelativeLayout - see root in your item cbFileDownload - CheckBox ID see in your item

And Menu: