怎么在Android中使用Websocket实现一个聊天室
这期内容当中小编将会给大家带来有关怎么在Android中使用Websocket实现一个聊天室，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
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WebSocket有以下几个特点
1.支持 WebSocket RFC6455, Draft Hybi-10+ and WAMP v1
2.支持Android 2.2以上
3.非常好的兼容性
4.高性能的异步设计
5.非常容易使用的api
6.与Android app非常好的结合
7.没有网络操作在UI线程
8.开源
下面是官网给的一段示例代码
private final WebSocketConnection mConnection = new WebSocketConnection();
private void start() {
final String wsuri = "ws://localhost:9000";
try {
mConnection.connect(wsuri, new WebSocketHandler() {
@Override
public void onOpen() {
Log.d(TAG, "Status: Connected to " + wsuri);
mConnection.sendTextMessage("Hello, world!");
}
@Override
public void onTextMessage(String payload) {
Log.d(TAG, "Got echo: " + payload);
}
@Override
public void onClose(int code, String reason) {
Log.d(TAG, "Connection lost.");
}
});
} catch (WebSocketException e) {
Log.d(TAG, e.toString());
}
}是不是挺简单的，在onOpen（）方法中做与服务器连接的操作，onTextMessage（）是收到服务器发送给客服端的消息，onClose（）是与服务器断开走的方法，发送消息用sendTextMessage（）。
我是在MsgService 实现与服务器的连接与发送消息的，直接上代码：
public class MsgService extends Service {
private final IBinder binder = new MsgBinder();
private boolean flag = false;
private WebSocketConnection mConnection;
private Intent intent = new Intent("com.example.communication.RECEIVER");
public void startSocket(String sn) {
final String wsuri = "ws://localhost:9000";
final JSONObject json = new JSONObject();
try {
json.put("type", "command");
json.put("command", "auth");
json.put("key", Constants.API_KEY);
json.put("access_token", UserManager.getInstance().getUser()
.getUserAccessToken());
json.put("user_token", UserManager.getInstance().getUser()
.getLYUserToken());
json.put("sn", sn);
} catch (Exception e) {
e.printStackTrace();
}
try {
mConnection.connect(wsuri, new WebSocketHandler() {
@Override
public void onOpen() {
if (!flag) {
//与服务器连接认证
mConnection.sendTextMessage(json.toString());
} else {
}
}
@Override
public void onTextMessage(String payload) {
intent.putExtra("message", payload);
sendBroadcast(intent);//发送广播给Fragment
}
@Override
public void onClose(int code, String reason) {
//连接失败也把效应的提示信息告诉用户
Map map = new HashMap<>();
map.put("status", "failed");
map.put("type", "command");
map.put("command", "auth");
String msg = map.toString();
intent.putExtra("message", msg);
sendBroadcast(intent);
}
});
} catch (WebSocketException e) {
e.printStackTrace();
}
}
//发送消息的方法
public void sendMessage(String message) {
mConnection.sendTextMessage(message);
}
@Override
public IBinder onBind(Intent intent) {
return binder;
}
@Override
public void onCreate() {
mConnection = new WebSocketConnection();
super.onCreate();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return super.onStartCommand(intent, flags, startId);
}
public class MsgBinder extends Binder {
/**
* 获取当前Service的实例
*
* @return
*/
public MsgService getService() {
return MsgService.this;
}
}
@Override
public void onDestroy() {
super.onDestroy();
mConnection.disconnect();
}
} 下面是Fragment的代码
public class ChatRoomFragment extends Fragment {
private View view, rootView, headView;
private MsgService msgService;
private UListView chatlist;//因为ScrollVie与ListView有冲突，重写了ListView
private static List mlist;
private ChatMessage chatMessage;
private ChatMessageAdapter chatMessageAdapter;
private ScrollView scrollView;
private Handler handler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
msgService
.startSocket(((PlayActivity) getActivity()).getSn());
break;
default:
break;
}
}
};
//通过聊天室来更新在线人数
public interface UpdataOnlineUsersListener {
public void updataOnlineUser(int number);
}
private UpdataOnlineUsersListener mCallback;
private EditText messageEditText;
private Button sendBtn;
private Intent mIntent;
private MsgReceiver msgReceiver;
private ServiceConnection conn = new ServiceConnection() {
@Override
public void onServiceDisconnected(ComponentName name) {
Log.d("time", "msg");
}
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
// 返回一个MsgService对象
MsgService.MsgBinder binder = (MsgService.MsgBinder) service;
if (binder != null) {
Log.d("time", "msg");
}
msgService = binder.getService();
if (msgService != null) {
Log.d("time", "msg");
Message msg = new Message();
msg.what = 1;
handler.sendMessage(msg);
}
}
};
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_chat_room, container, false);
return view;
}
public void bindChatService() {
getActivity().bindService(mIntent, conn, Context.BIND_AUTO_CREATE);
}
public void destoryChatService() {
getActivity().unbindService(conn);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
mCallback = (UpdataOnlineUsersListener) (activity);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// 动态注册广播接收器
msgReceiver = new MsgReceiver();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("com.example.communication.RECEIVER");
getActivity().registerReceiver(msgReceiver, intentFilter);
mIntent = new Intent(getActivity(), MsgService.class);
bindChatService();
chatlist = (UListView) view.findViewById(R.id.chatlist);
messageEditText = (EditText) view.findViewById(R.id.input);
scrollView = (ScrollView) view.findViewById(R.id.scroll);
scrollView.setFocusable(false);
mlist = new ArrayList();
chatMessageAdapter = new ChatMessageAdapter(mlist, getActivity());
chatlist.setAdapter(chatMessageAdapter);
chatlist.setVerticalScrollBarEnabled(true);
sendBtn = (Button) view.findViewById(R.id.send);
builder = new AlertDialog.Builder(getActivity());
sendBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
final View view = v;
if (UserManager.getInstance().getUser().getGuest()) {
ToastUtil.getInstance().showToast(getActivity(), getResources().getString(R.string.is_not_login));
} else {
String message = messageEditText.getText().toString();
if (!message.equals("")) {
JSONObject json = new JSONObject();
try {
json.put("type", "message");
json.put("to", "");
json.put("message", message);
} catch (Exception e) {
}
msgService.sendMessage(json.toString());
} else {
Toast.makeText(getActivity(),
getResources().getString(R.string.textisnull),
Toast.LENGTH_SHORT).show();
}
}
HideKeyboard(v);
messageEditText.setText("");
}
});
rootView = (View) view.findViewById(R.id.rootview);
rootView.setFocusable(true);
rootView.setFocusableInTouchMode(true);
rootView.requestFocus();
setRetainInstance(true);
}
//隐藏软键盘
private void HideKeyboard(View v) {
InputMethodManager imm = (InputMethodManager) v.getContext()
.getSystemService(Context.INPUT_METHOD_SERVICE);
if (imm.isActive()) {
imm.hideSoftInputFromWindow(v.getApplicationWindowToken(), 0);
}
}
@Override
public void onResume() {
super.onResume();
scrollView.smoothScrollTo(0, 0);
}
//接受服务端发送的消息
public class MsgReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String msg = intent.getStringExtra("message");
try {
JSONObject json = new JSONObject(msg);
if (json.getString("type").equals("command")) {
String command = json.getString("command");
if (command.equals("auth")) {
{
chatMessage = new ChatMessage("tips", "服务器连接中...",
"111", "111");
mlist.add(chatMessage);
chatMessageAdapter.notifyDataSetChanged();
}
if (json.getString("status").equals("success")) {
chatMessage = new ChatMessage("tips", "服务器连接中成功",
"111", "111");
} else {
chatMessage = new ChatMessage("tips", "服务器连接中失败",
"111", "111");
}
mlist.add(chatMessage);
chatMessageAdapter.notifyDataSetChanged();
} else if (command.equals("online_status")) {
int onlineUser = json.getInt("online");
mCallback.updataOnlineUser(onlineUser);
}
} else if (json.getString("type").equals("message")) {
chatMessage = new ChatMessage(json.getString("type"),
json.getString("from"), json.getString("content"),
json.getString("time"));
mlist.add(chatMessage);
chatMessageAdapter.notifyDataSetChanged();
}
Log.d("time", mlist.toString());
} catch (JSONException e) {
e.printStackTrace();
}
chatlist.setSelection(chatMessageAdapter.getCount());//让ListView滑到最下面
}
}
@Override
public void onDestroy() {
// 停止服务
getActivity().unbindService(conn);
// 注销广播
getActivity().unregisterReceiver(msgReceiver);
super.onDestroy();
}
} 上述就是小编为大家分享的怎么在Android中使用Websocket实现一个聊天室了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联行业资讯频道。
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