PickAtUserActivity.java

package com.fanxin.huangfangyi.ui;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

import com.fanxin.easeui.domain.EaseUser;
import com.fanxin.easeui.utils.EaseUserUtils;
import com.hyphenate.chat.EMClient;
import com.hyphenate.chat.EMGroup;
import com.fanxin.huangfangyi.R;
import com.fanxin.easeui.adapter.EaseContactAdapter;

public class PickAtUserActivity extends BaseActivity {
    @Override
    protected void onCreate(Bundle arg0) {
        super.onCreate(arg0);
        setContentView(R.layout.activity_pick_at_user);
        
        String groupId = getIntent().getStringExtra("groupId");
        EMGroup group = EMClient.getInstance().groupManager().getGroup(groupId);
        final ListView listView = (ListView) findViewById(R.id.list);
        List<String> members = group.getMembers();
        List<EaseUser> userList = new ArrayList<EaseUser>();
        for(String username : members){
            EaseUser user = EaseUserUtils.getUserInfo(username);
            userList.add(user);
        }
        Collections.sort(userList, new Comparator<EaseUser>() {

            @Override
            public int compare(EaseUser lhs, EaseUser rhs) {
                if(lhs.getInitialLetter().equals(rhs.getInitialLetter())){
                    return lhs.getNick().compareTo(rhs.getNick());
                }else{
                    if("#".equals(lhs.getInitialLetter())){
                        return 1;
                    }else if("#".equals(rhs.getInitialLetter())){
                        return -1;
                    }
                    return lhs.getInitialLetter().compareTo(rhs.getInitialLetter());
                }
                
            }
        });
        listView.setAdapter(new PickUserAdapter(this, 0, userList));
        listView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                EaseUser user = (EaseUser) listView.getItemAtPosition(position);
                if(EMClient.getInstance().getCurrentUser().equals(user.getUsername()))
                    return;
                setResult(Activity.RESULT_OK, new Intent().putExtra("username", user.getUsername()));
                finish();
            }
        });
    }
    
    private class PickUserAdapter extends EaseContactAdapter{

        public PickUserAdapter(Context context, int resource, List<EaseUser> objects) {
            super(context, resource, objects);
        }
    }
}