I want to disable/enable all checkboxes in listview. infact want to get select all behaviour by clicking on top checkbox.

thanks

Solution 1

This is what finally worked for me, where I'm using a cursor adapter, not just an ArrayListAdapter for my list items:

final ListView list = getListView();
for ( int i=0; i< getListAdapter().getCount(); i++ ) {
        list.setItemChecked(i, true);
}

list.getChildCount doesn't work because it only seems to count what's been drawn immediately (not everything that's off the screen) so childCount might only be 6 or 8 items when the entire list is 100 or more items. Also as I had to use list.setItemChecked to get the items to 'stay checked' -- at least in my case where my list items were instances of CheckedTextView.

Solution 2

for(int i=0; i < listView.getChildCount(); i++){
    RelativeLayout itemLayout = (RelativeLayout)listView.getChildAt(i);
    CheckBox cb = (CheckBox)itemLayout.findViewById(R.id.MyListViewCheckBox);
    cb.setChecked(true);
}

You need to edit this code to handle both enabling and disabling, but I hope you get the idea !

Also, this only checks each checkbox, make sure you are returning an id or object from your list in order to send/save the data elsewhere.

Solution 3

I think you should run this long-running task off the UI thread. When you click button in OnClickListener:

new Thread(new Runnable() {
                    @Override
                    public void run() {
                        for (int i = 0; i < list.getAdapter().getCount(); i++) {
                            final int position = i;
                            mHandler.post(new Runnable() {
                                @Override
                                public void run() {
                                    list.setItemChecked(pos, true);  
                                }
                            });
                        }
                    }
                }).start();     

and in onCreate() :

this.mHandler = new Handler();

Each item in list view should be Checkable like CheckableRelativeLayout that implements Checkable interface.

Solution 4

just add one more parameter in adapter as

Boolean Ex.MyAdapter adapter = new Save_Weight_Adapter(this, R.layout.layoutname, array, false);
listview.setAdapter(adapter);

on select all button click listener add this code

MyAdapter adapter = new Save_Weight_Adapter(this, R.layout.layoutname, array, true);
listview.setAdapter(adapter);

and check in adpater

if(chk) {
    blue_check.setVisibility(View.VISIBLE);
} else {
    blue_check.setVisibility(View.GONE);
}