Android 开发即时聊天工具 YQ ：（六）最近会话列表

实现的效果如图：

RecentActivity：

 1 <span style="font-size: 14px;">public class RecentActivity extends Activity{
 2     ListView listView;
 3     List<RecentEntity> chatEntityList=new ArrayList<RecentEntity>();
 4     String[] mes;
 5     
 6     protected void onCreate(Bundle savedInstanceState) {
 7         super.onCreate(savedInstanceState);
 8         requestWindowFeature(Window.FEATURE_NO_TITLE);
 9         setContentView(R.layout.activity_recent);
10          //注册广播
11         IntentFilter myIntentFilter = new IntentFilter(); 
12         myIntentFilter.addAction("org.yhn.yq.mes");
13         registerReceiver(new MyBroadcastReceiver(), myIntentFilter);
14         
15         listView = (ListView) findViewById(R.id.lv_recent);
16         listView.setOnItemClickListener(new OnItemClickListener(){
17             public void onItemClick(AdapterView<?> arg0, View arg1, int position,
18                     long arg3) {
19                 //打开聊天页面
20                 Intent intent=new Intent(RecentActivity.this,ChatActivity.class);
21                 intent.putExtra("account", Integer.parseInt(mes[0]));
22                 intent.putExtra("nick", "");
23                 startActivity(intent);
24             }
25         });
26     }
27 
28     //广播接收器
29     public class MyBroadcastReceiver extends BroadcastReceiver {
30         @Override
31         public void onReceive(Context context, Intent intent) {
32             mes = intent.getStringArrayExtra("message");
33             Toast.makeText(context, "收到["+Integer.parseInt(mes[0])+"]的消息："+mes[1], Toast.LENGTH_SHORT).show();
34             //更新最近会话列表， 检测chatEntityList，防止同一个好友的消息出现多个会话实体
35             Iterator it=chatEntityList.iterator();
36             if(chatEntityList!=null && chatEntityList.size()!=0){
37                 while(it.hasNext()){
38                     RecentEntity re=(RecentEntity) it.next();
39                     if(re.getAccount()==Integer.parseInt(mes[0])){
40                         chatEntityList.remove(re);
41                     }
42                 }
43             }
44             chatEntityList.add(new RecentEntity(5, Integer.parseInt(mes[0]), mes[0]+"", mes[1],mes[2], false));
45             listView.setAdapter(new RecentAdapter(RecentActivity.this, chatEntityList));
46             unregisterReceiver(this);
47         }
48     }
49 }
50 </span>

RecentActivity中listview的Adapter：

 1 <span style="font-size: 14px;">public class RecentAdapter extends BaseAdapter{
 2     private Context context;
 3     private List<RecentEntity> list;
 4     LayoutInflater inflater;
 5     
 6     public RecentAdapter(Context context,List<RecentEntity> list){
 7         this.context = context;
 8         this.list = list;
 9         inflater = LayoutInflater.from(context);
10     }
11 
12     public View getView(int position, View convertView, ViewGroup root) {
13         convertView = inflater.inflate(R.layout.recent_listview_item, null);
14         
15         ImageView avatar=(ImageView) convertView.findViewById(R.id.iv_avatar_r);
16         TextView nick=(TextView) convertView.findViewById(R.id.tv_nick_r);
17         TextView content=(TextView) convertView.findViewById(R.id.tv_chat_content_r);
18         ImageView isRead=(ImageView) convertView.findViewById(R.id.iv_tip_mes_r);
19         TextView time=(TextView) convertView.findViewById(R.id.tv_time_r);
20 
21         RecentEntity re=list.get(position);
22         nick.setText(re.getNick());
23         content.setText(re.getContent());
24         isRead.setImageResource(R.drawable.tips_message);
25         time.setText(re.getTime());
26 
27         return convertView;
28     }
29     public int getCount() {
30         return list.size();
31     }
32 
33     public Object getItem(int position) {
34         return list.get(position);
35     }
36 
37     public long getItemId(int position) {
38         return position;
39     }
40 }
41 </span>