title: How to disable actionbar back button in ActionMode
body: <p>I use ActionMode to edit some content, those three buttons on the right do everything needed, and the back/home/up button on the left becomes redundant. </p>
  
  <p><img src="https://i.stack.imgur.com/Ww2Ug.jpg" alt="Screenshot, see that button on the left"></p>
  
  <p>Here's the ActionMode</p>
  
  <pre><code>private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {
      @Override
      public boolean onCreateActionMode(ActionMode mode, Menu menu) {
          MenuInflater inflater = mode.getMenuInflater();
          inflater.inflate(R.menu.editormenu, menu);
          return true;
      }
      @Override
      public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
          return false;
      }
      @Override
      public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
          switch (item.getItemId()) {
              case R.id.action_cancel:
                  selectedView.onCancelEditing();
                  selectedView.enableEditMode(selectedView,false);
                  mode.finish(); 
                  return true;
              case R.id.action_remove:
                  selectedView.enableEditMode(selectedView,false);
                  relContainer.removeView(selectedView);
                  mode.finish();
                  return true;
              case R.id.action_done:
                  selectedView.enableEditMode(selectedView,false);
                  mode.finish();
                  return true;
              default:
                  return false;
          }
      }
      @Override
      public void onDestroyActionMode(ActionMode mode) {
          mActionMode = null;
      }
  };
  </code></pre>
  
  <p>I tried to use that back/home/up button as "cancel" button but it seems that it's id is not android.R.id.home nor R.id.home</p>
  
  <p>so question is: How do I remove/disable this button, OR How do I make use of it?</p>