Toolbar won't disappear in action mode

As pointed out in the link provided in comments you just need to add following line to your AppTheme style:

<item name="windowActionModeOverlay">true</item>

It just indicates that action mode should overlay window content instead of pushing it down,it tells that you don't need any reserved space for action mode.

Well as far as i go through your code and understand it, you have done everything that you provided your Toolbar to act as ActionBar and used .NoActionBar theme except according to Android Developer you should also set the windowActionBar attribute to false in your style. enter link description here Second para clears it out.

I hope it helps!

all of this answers are fine you should try them but what you need is a ContextualMenu so you should first add views to a registerForContextMenu() so menu knows which menus are contextual then implement the onCreateContextMenu of your Activity

@Override
public void onCreateContextMenu(ContextMenu menu, View v,
                            ContextMenuInfo menuInfo) {
   super.onCreateContextMenu(menu, v, menuInfo);
   MenuInflater inflater = getMenuInflater();
   inflater.inflate(R.menu.context_menu, menu);
}

then implement onContextItemSelected() like this :

@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
switch (item.getItemId()) {
    case R.id.edit:
        editNote(info.id);
        return true;
    case R.id.delete:
        deleteNote(info.id);
        return true;
    default:
        return super.onContextItemSelected(item);
}
}

then you have to perform an action on views and implement AbsListView.MultiChoiceModeListener then call setChoiceMode() with the CHOICE_MODE_MULTIPLE_MODAL argument. like this :

ListView listView = getListView();
listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
listView.setMultiChoiceModeListener(new MultiChoiceModeListener() {

@Override
public void onItemCheckedStateChanged(ActionMode mode, int position,
                                      long id, boolean checked) {
    // Here you can do something when items are selected/de-selected,
    // such as update the title in the CAB
}

@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
    // Respond to clicks on the actions in the CAB
    switch (item.getItemId()) {
        case R.id.menu_delete:
            deleteSelectedItems();
            mode.finish(); // Action picked, so close the CAB
            return true;
        default:
            return false;
    }
}

@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
    // Inflate the menu for the CAB
    MenuInflater inflater = mode.getMenuInflater();
    inflater.inflate(R.menu.context, menu);
    return true;
}

@Override
public void onDestroyActionMode(ActionMode mode) {
    // Here you can make any necessary updates to the activity when
    // the CAB is removed. By default, selected items are deselected/unchecked.
}

@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
    // Here you can perform updates to the CAB due to
    // an <code><a href="/reference/android   /view/ActionMode.html#invalidate()">invalidate()</a></code> request
    return false;
}
});

all of what i said and ultimately more, you can find in this android developer documentation