Select multiple thumbs

Hi,
Android.
1- I need to know how to select multiple thumbs in the thumb view (I don't want to change the page when I click on a thumb.
2- I need to know how to add for example a check box on the thumb page in the thumbs view.

u'd better create a listview.
each item is LinearLayout, include a check box and a custom View.
custom view to render each page in backing thread.
when item scroll off of screen, then release memory used for custom View, like Bitmap.
and start render page for custom View(a boolean value to control render thread).

radaee wrote: u'd better create a listview.
each item is LinearLayout, include a check box and a custom View.
custom view to render each page in backing thread.
when item scroll off of screen, then release memory used for custom View, like Bitmap.
and start render page for custom View(a boolean value to control render thread).

Could you let me know more details?
FYI, I bought a professional license.