@Override
 public boolean onMenuItemSelected(int featureId, MenuItem item) {
   int menuId = item.getItemId();
   if (menuId == R.id.people) {
     Utils.goActivity(this, ConversationDetailActivity.class);
   }
   return super.onMenuItemSelected(featureId, item);
 }
 public static void chatByUserId(final Activity from, String userId) {
   final ProgressDialog dialog = Utils.showSpinnerDialog(from);
   ChatManager.getInstance()
       .fetchConversationWithUserId(
           userId,
           new AVIMConversationCreatedCallback() {
             @Override
             public void done(AVIMConversation conversation, AVException e) {
               dialog.dismiss();
               if (Utils.filterException(e)) {
                 chatByConversation(from, conversation);
               }
             }
           });
 }