我正在开发即时消息安卓应用程序。我已经成功实现了我的应用程序和Web应用程序之间的聊天。我使用compile 'io.socket:socket.io-client:0.6.2'库来实现这一点。但是，当我在另一部手机上安装相同的应用程序时，设备到设备的通信不起作用。我想我在这里错过了一些东西。我现在必须在我的应用程序中实现。广播接收器或GCM（Google云消息传递）。我的代码如下：
1。 ChatActivity.java
public class ChatActivity extends Activity {
public static final String TAG = ChatActivity.class.getSimpleName();
EditText edMessage;
Button sendMessage;
private Socket mSocket;
String sID, lID, md5StringRoomID, message, friendName, loggedInUser;
String frndID;
int smallerID, largerID;
AlmaChatDatabase almaChatDatabase;
// Chat messages list adapter
private MessagesListAdapter adapter;
private List<Message> listMessages;
private ListView listViewMessages;
boolean isSelf = false; // to check whether the message is owned by you or not.true means message is owned by you .
Message msg;
int loggedInUserID;
private String URL_FEED_Message = "";
APIConfiguration apiConfiguration;
{
try {
mSocket = IO.socket(Constants.CHAT_SERVER_URL);
Log.e("Socket", String.valueOf(mSocket));
} catch (URISyntaxException e) {
throw new RuntimeException(e);
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
sendMessage = (Button) findViewById(R.id.btnSendMessage);
almaChatDatabase = new AlmaChatDatabase(getApplicationContext());
loggedInUserID = almaChatDatabase.getUserID(); // Getting ID of the Logged in user from the database
Log.e("UserID", "Id of Logged in user " + loggedInUserID);
listMessages = new ArrayList<Message>();
adapter = new MessagesListAdapter(getApplicationContext(), listMessages);
listViewMessages = (ListView) findViewById(R.id.list_view_messages);
listViewMessages.setAdapter(adapter);
// Getting the ID of the friend from the previous screen using getExtras
Bundle bundle = getIntent().getExtras();
frndID = bundle.getString("ID");
Log.e("FriendID", frndID);
final int friendID = Integer.parseInt(frndID);
friendName = bundle.getString("name");
Log.e("FriendName", friendName);
loggedInUser = almaChatDatabase.getUserName(); // Name of logged in user
Log.e("LoggedInUser", loggedInUser);
// Converting first lowercase letter of every word in Uppercase
final String loggedInUpper = upperCase(loggedInUser);
//To find the current time
Date d = new Date();
final long time = d.getTime();
// Comparing the loggedInUserId and friendID
if (friendID < loggedInUserID) {
smallerID = friendID;
largerID = loggedInUserID;
} else {
smallerID = loggedInUserID;
largerID = friendID;
}
sID = String.valueOf(smallerID);
lID = String.valueOf(largerID);
String combinedID = sID + lID;
Log.e("combined ID", combinedID);
md5StringRoomID = convertPassMd5(combinedID); // Encrypting the combinedID to generate Room ID
Log.e("md5StringRoomID", md5StringRoomID);
// Using the API for loading old chat messages
apiConfiguration = new APIConfiguration();
String api_message = apiConfiguration.getApi_message(); // Getting the API of messages
URL_FEED_Message = api_message + md5StringRoomID; // md5String is the encrypted room ID here
Log.e("URL_FEED_MESSAGE", URL_FEED_Message);
Log.e("Network request", "Fresh Request");
// We first check for cached request
Cache cache = AppController.getInstance().getRequestQueue().getCache();
Cache.Entry entry = cache.get(URL_FEED_Message);
if (entry != null) {
// fetch the data from cache
try {
String data = new String(entry.data, "UTF-8");
try {
parseJsonFeed(new JSONArray(data));
} catch (JSONException e) {
e.printStackTrace();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
} else {
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(URL_FEED_Message, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray jsonArray) {
Log.e("JsonArray", String.valueOf(jsonArray));
if (jsonArray != null) {
parseJsonFeed(jsonArray);
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
Log.e("ErrorResponse", String.valueOf(volleyError));
}
}
);
// Adding request to volley request queue
AppController.getInstance().addToRequestQueue(jsonArrayRequest);
}
edMessage = (EditText) findViewById(R.id.edtMessage);
//Listening on Events
mSocket.on(Socket.EVENT_CONNECT, onConnect);
mSocket.on(Socket.EVENT_CONNECT_ERROR, onConnectionError);
mSocket.on(Socket.EVENT_DISCONNECT, onDisconnect);
mSocket.on("send:notice", onReceive); // Listening event for receiving messages
mSocket.connect(); // Explicitly call connect method to establish connection here
mSocket.emit("subscribe", md5StringRoomID);
sendMessage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//mSocket.emit("subscribe", md5String);
message = edMessage.getText().toString().trim();
Log.e("message", message);
if (!message.equals("")) {
edMessage.setText(" ");
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("room_id", md5StringRoomID);
jsonObject.put("user", loggedInUpper);
jsonObject.put("id", friendID);
jsonObject.put("message", message);
jsonObject.put("date", time);
jsonObject.put("status", "sent");
} catch (JSONException e) {
e.printStackTrace();
}
isSelf = true; // Boolean isSelf is set to be true as sender of the message is logged in user i.e. you
attemptToSend(loggedInUpper, message, isSelf);
mSocket.emit("send", jsonObject); // owner i.e LoggedIn user is sending the message
} else {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "Please enter some text", Toast.LENGTH_LONG).show();
}
});
}
}
});
}
//Adding message in the arrayList
public void attemptToSend(String senderName, String message, boolean isSelf) {
msg = new Message(senderName, message, isSelf);
listMessages.add(msg);
adapter.notifyDataSetChanged();
playBeep();
}
// Playing sound when the message is sent by the owner
public void playBeep() {
try {
Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Ringtone r = RingtoneManager.getRingtone(getApplicationContext(), notification);
r.play();
} catch (Exception e) {
e.printStackTrace();
}
}
// encrypting string into MD5
public static String convertPassMd5(String pass) {
String password = null;
MessageDigest mdEnc;
try {
mdEnc = MessageDigest.getInstance("MD5");
mdEnc.update(pass.getBytes(), 0, pass.length());
pass = new BigInteger(1, mdEnc.digest()).toString(16);
while (pass.length() < 32) {
pass = "0" + pass;
}
password = pass;
} catch (NoSuchAlgorithmException e1) {
e1.printStackTrace();
}
return password;
}
// Converting first lowercase letter of every word in Uppercase
String upperCase(String source) {
StringBuffer res = new StringBuffer();
String[] strArr = source.split(" ");
for (String str : strArr) {
char[] stringArray = str.trim().toCharArray();
stringArray[0] = Character.toUpperCase(stringArray[0]);
str = new String(stringArray);
res.append(str).append(" ");
}
return res.toString().trim();
}
// Event Listeners
private Emitter.Listener onConnect = new Emitter.Listener() {
@Override
public void call(Object... args) {
Log.e("Socket", "Connected");
}
};
private Emitter.Listener onConnectionError = new Emitter.Listener() {
@Override
public void call(Object... args) {
Log.e("Error", "Error in connecting server");
}
};
private Emitter.Listener onDisconnect = new Emitter.Listener() {
@Override
public void call(Object... args) {
Log.e("Disconnect", "Socket Disconnected");
}
};
// Event Listener for receiving messages
private Emitter.Listener onReceive = new Emitter.Listener() {
@Override
public void call(final Object... args) {
Log.e("Receive", "Message received");
runOnUiThread(new Runnable() {
@Override
public void run() {
JSONObject data = (JSONObject) args[0];
Log.e("DATA", String.valueOf(data));
try {
JSONArray ops = data.getJSONArray("ops");
for (int i = 0; i < ops.length(); i++) {
JSONObject object = ops.getJSONObject(i);
String roomID = object.getString("room_id");
Log.e("RoomID", roomID); // Getting room ID from JSON array
Log.e("Md5RoomID", md5StringRoomID); // Getting room id which we have created using logged in user ID and room id of the user through which chat has to be done
//Comparing the room IDs
if (md5StringRoomID.equals(roomID)) {
String senderName = object.getString("user");
Log.e("Sender Name", senderName);
String senderID = object.getString("id");
Log.e("SenderID", senderID);
JSONObject message = object.getJSONObject("message");
String messageReceived = message.getString("text");
Log.e("Message Received", messageReceived);
String loggedInUSerNAme = almaChatDatabase.getUserName();
//If the message is sent by the owner to other from webapp ,then we need to check whether the sender is the loggedinUSer in the App or not and we will right align the messages .
if (loggedInUSerNAme.equalsIgnoreCase(senderName)) {
isSelf = true;
msg = new Message(senderName, messageReceived, isSelf);
listMessages.add(msg);
adapter.notifyDataSetChanged();
playBeep();
} else {
isSelf = false;
msg = new Message(senderName, messageReceived, isSelf);
listMessages.add(msg);
adapter.notifyDataSetChanged();
playBeep();
}
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
// Playing sound when the message is sent by other
public void playBeep() {
try {
Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Ringtone r = RingtoneManager.getRingtone(getApplicationContext(), notification);
r.play();
} catch (Exception e) {
e.printStackTrace();
}
}
};
// Parsing JSon Array which corresponds to the old chat messages
public void parseJsonFeed(JSONArray jsonArray) {
for (int i = 0; i < jsonArray.length(); i++) {
try {
JSONObject jsonObject = jsonArray.getJSONObject(i);
String roomID = jsonObject.getString("room_id");
Log.e("RoomID", roomID);
Log.e("Md5RoomID", md5StringRoomID);
// If Room ID(created using id of logged in user and id of friend) matches with the room id obtained from JSON String
if (md5StringRoomID.equals(roomID)) {
String userName = jsonObject.getString("user");
Log.e("Name", userName);
String loggedInUSerNAme = almaChatDatabase.getUserName();
Log.e("LoggedInUSer", loggedInUSerNAme);
//If the message is sent by the owner to other from webapp ,then we need to check whether the sender is the loggedinUSer in the App or not and we will right align the messages .
if (loggedInUSerNAme.equalsIgnoreCase(userName)) {
String message = jsonObject.getString("message");
Log.e("message", message);
isSelf = true;
msg = new Message(userName, message, isSelf);
listMessages.add(msg);
adapter.notifyDataSetChanged();
//playBeep();
} else {
JSONObject jsonMessage = jsonObject.getJSONObject("message");
String message = jsonMessage.getString("text");
isSelf = false;
msg = new Message(userName, message, isSelf);
listMessages.add(msg);
adapter.notifyDataSetChanged();
// playBeep();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
// notify data changes to list adapter
//adapter.notifyDataSetChanged();
}
}
}
2.Constants.java
public class Constants {
public static final String CHAT_SERVER_URL = "http://192.168.2.250:3000/";
}
除了设备到设备之外，一切都在起作用。我可以将消息从我的应用程序发送到Web应用程序，也可以从Web App接收消息。但是设备到设备的通信不起作用。请帮我解决这个问题。