import com.hyphenate.chat.EMContact; //导入依赖的package包/类
private void asyncGetRobotNamesFromServer(final EMValueCallBack<List<EMContact>> callback) {
	new Thread(new Runnable() {

		@Override
		public void run() {
			try {
				List<EMContact> mList = EMClient.getInstance().getRobotsFromServer();
				callback.onSuccess(mList);
			} catch (HyphenateException e) {
				e.printStackTrace();
				callback.onError(e.getErrorCode(), e.toString());
			}
		}
	}).start();
}
 

import com.hyphenate.chat.EMContact; //导入依赖的package包/类
private void getRobotNamesFromServer() {
	asyncGetRobotNamesFromServer(new EMValueCallBack<List<EMContact>>() {

		@Override
		public void onSuccess(final List<EMContact> value) {
			runOnUiThread(new Runnable() {
				@Override
				public void run() {
					progressBar.setVisibility(View.GONE);
					swipeRefreshLayout.setRefreshing(false);
					Map<String, RobotUser> mMap = new HashMap<String, RobotUser>();
					for (EMContact item : value) {
						RobotUser user = new RobotUser(item.getUsername());
						user.setNick(item.getNick());
						user.setInitialLetter("#");
						mMap.put(item.getUsername(), user);
					}
					robotList.clear();
					robotList.addAll(mMap.values());
					// save it in cache
					DemoHelper.getInstance().setRobotList(mMap);
					// save it in database
					UserDao dao = new UserDao(RobotsActivity.this);
					dao.saveRobotUser(robotList);
					adapter.notifyDataSetChanged();
				}
			});
		}

		@Override
		public void onError(int error, String errorMsg) {
			runOnUiThread(new Runnable() {
				@Override
				public void run() {
					swipeRefreshLayout.setRefreshing(false);
					progressBar.setVisibility(View.GONE);
				}
			});
		}
	});
}