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我正在聊天客戶端應用程序，我已經做了一個服務器。我設法讓客戶端連接到服務器，但是當我向服務器發送消息時，服務器沒有任何反應。服務器似乎沒有收到客戶端消息ANDROID
這裏是我的服務器的代碼不工作
class ClientConnect implements Runnable {
private DataInputStream in = null;
private DataOutputStream out = null;
Socket client;
ClientConnect(Socket client) {
try {
this.client = client;
/* obtain an input stream to this client ... */
in = new DataInputStream (client.getInputStream());
/* ... and an output stream to the same client */
setOut(new DataOutputStream (client.getOutputStream()));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void run() {
String msg, response;
ChatServerProtocol protocol = new ChatServerProtocol(this);
try {
while (true) {
if (in.available() > 0){
msg = in.readUTF();
response = protocol.process(msg);
getOut().writeBytes("SERVER: " + response);
}
}
} catch (IOException e) {
System.err.println(e);
} finally {
// The connection is closed for one reason or another
try {
client.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public void sendMsg(String msg) {
try {
getOut().writeBytes(msg);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public DataOutputStream getOut() {
return out;
}
public void setOut(DataOutputStream out) {
this.out = out;
}
}
的一部分，這裏是客戶端：
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String response = null;
EditText nicknameField = (EditText)findViewById(R.id.nicknameField);
EditText passwordField = (EditText)findViewById(R.id.passwordField);
nickname = nicknameField.getText().toString();
password = passwordField.getText().toString();
switch(v.getId()){
case R.id.signin:
new SendMessage(this).execute("SIGNUP " + nickname + " " + password);
break;
case R.id.signup:
new SendMessage(this).execute("SIGNUP " + nickname + " " + password);
break;
}
}
private String onPostExecuteSendMessage() {
return null;
}
public void showMessage(String response) {
Builder builder = new AlertDialog.Builder(this);
builder.setMessage(response);
AlertDialog dialog = builder.create();
dialog.show();
}
public void getClientSocket(Socket client) {
this.client = client;
try {
out = new DataOutputStream (client.getOutputStream());
in = new DataInputStream (client.getInputStream());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public DataOutputStream getOut() {
// TODO Auto-generated method stub
return this.out;
}
public DataInputStream getIn() {
// TODO Auto-generated method stub
return this.in;
}
public void goMenuChat() {
// TODO Auto-generated method stub
Intent intent = new Intent(this, MenuChatActivity.class);
startActivity(intent);
}
}
而且我用的AsyncTask從客戶端發送消息：
package client.chatclient;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.ref.WeakReference;
import android.os.AsyncTask;
public class SendMessage extends AsyncTask<String, String, String> {
private static final String msg_OK = "OK";
private static final String msg_NICK_IN_USE = "NICK IN USE";
private static final String msg_UNKNOWN_CMD = "UNKNOWN CMD";
private static final String msg_INVALID = "INVALID COMMAND";
private static final String msg_SEND_FAILED = "FAILED TO SEND";
private static final String msg_INCORRECT_IDS = "INCORRECT IDS";
private static final String msg_DISCONNECT = "DISCONNECT";
private WeakReference<MainActivity> activity;
private String message;
private String response = "";
private DataOutputStream out;
private DataInputStream in;
public SendMessage(MainActivity act){
super();
activity = new WeakReference<MainActivity>(act);
}
protected String doInBackground(String... message) {
this.message = message[0];
this.out = activity.get().getOut();
this.in = activity.get().getIn();
try {
out.writeBytes(this.message);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
response = convertStreamToString(this.in);
return response;
}
protected void onPostExecute(String response) {
if ((response == msg_INCORRECT_IDS) || (response == msg_NICK_IN_USE)){
activity.get().showMessage(response);
}
else if (response == msg_OK){
activity.get().goMenuChat();
}
}
private static String convertStreamToString(DataInputStream in) {
/*
* To convert the InputStream to String we use the
* BufferedReader.readLine() method. We iterate until the BufferedReader
* return null which means there's no more data to read. Each line will
* appended to a StringBuilder and returned as String.
*/
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
}
我通過點擊一個按鈕從客戶端發送消息到SendMe ssage類，並且將消息發送到服務器，通常服務器應該在循環收到我的消息「而（真）...」，併發送回照我已經實現了協議的響應。
我真的不知道什麼是錯。如果你知道如何解決這個問題或有一些解決方案，請告訴我！如果你想要更多的細節，請問我！ :)
非常感謝您！
編輯：
我這裏實例化我ClientConnect
public class ChatServer {
private static int port = 8080;
public static void main (String[] args) throws IOException {
ServerSocket server = new ServerSocket(port); /* start listening on the port */
System.out.println("Listening on "+ server);
Socket client = null;
while(true) {
try {
client = server.accept();
System.out.println("Connection from " + client);
/* start a new thread to handle this client */
Thread t = new Thread(new ClientConnect(client));
t.start();
} catch (IOException e) {
System.err.println("Accept failed.");
System.err.println(e);
System.exit(1);
server.close();
}
}
}
}
編輯：我發現了問題的所在。我把一些log（）語句如你所說
log.d(null,"beforeconvert")
try {
log.d(null,"convert")
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
log.d(null,"errorconvert")
e.printStackTrace();
}
然後在logcat中，它只顯示「beforeconvert」。我真的不知道問題是什麼？ ，而（（行= reader.readLine（））！= NULL）無疑是這個問題。當我在日食步驟中使用調試器的步驟，它停在這條線上，甚至不走內環路。
編輯：我真的不知道爲什麼，但是當我跑我的應用程序時退出模擬器，它顯示了一切。
Listening on ServerSocket[addr=0.0.0.0/0.0.0.0,localport=8080]
Connection from Socket[addr=/127.0.0.1,port=56646,localport=8080]
client connected
msg received
error !
SIGNUP Nickname Password
SIGNUP Nickname Password
msg converted
OK
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.io.DataInputStream.read(Unknown Source)
at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
at sun.nio.cs.StreamDecoder.read(Unknown Source)
at java.io.InputStreamReader.read(Unknown Source)
at java.io.BufferedReader.fill(Unknown Source)
at java.io.BufferedReader.readLine(Unknown Source)
at java.io.BufferedReader.readLine(Unknown Source)
at server.ClientConnect.convertStreamToString(ChatServer.java:357)
at server.ClientConnect.run(ChatServer.java:304)
at java.lang.Thread.run(Unknown Source)
java.net.SocketException: Connection reset by peer: socket write error
添加一些日誌（）語句，所以你/我們可以看到服務器到達多遠。把它們也放在catch塊中。顯示你如何實例化/調用ClientConnect。 – greenapps
我的問題可能來自while（（line = reader.readLine（））！= null）{我是否正確使用readLine方法？ – nytochin
你的服務器沒有發送任何東西。所以你的客戶沒有什麼可讀的。 – greenapps