I would like to do an edit mode, in the style of the tablet gmail app. If the user presses the edit button on the actionbar, than I would like to show him/her an action view
If you're on API level 14 or above and are not using ActionbarSherlock, this code in onCreateOptionsMenu
will disable the up button, remove the left caret, and remove the icon:
ActionBar actionBar = getActionBar();
if (actionBar != null) {
actionBar.setHomeButtonEnabled(false); // disable the button
actionBar.setDisplayHomeAsUpEnabled(false); // remove the left caret
actionBar.setDisplayShowHomeEnabled(false); // remove the icon
}