android 换了个手机socket就连接不上服务器了,Android中使用Socket与服务器通信，服务器报Connection reset的错...

鄙人初次使用Android进行邮件服务系统客户端的开发，想利用socket与小伙伴编写的服务器进行通信，实现登陆注册功能。所使用的协议是自己自定义的(不过这不是重点)。但登录时总会卡在new Socket(IP,port)上，该语句一执行完，服务器就会报Connection Reset的错。

经过网上搜集资料，原因可能是客户端建立了套接字，但服务器从输入输出流中读取数据之前，客户端socket就已经关闭了。

但是在Android中进行Debug发现，报错就在执行完

client = new Socket(ServerInfo.sockethost, ServerInfo.socketport);

后出现。

上代码。

客户端：

public class Login extends Activity {

private Intent intent = null;

private EditText account = null; // 账号

private EditText passwpord = null; // 密码

private Button login = null; // 登录

private TextView register = null; // 注册

private String useraccount = null;

private String userpassword = null;

private Dialog m_Dialog = null; // 提示

private Handler m_Handler = null; // 指向某一个线程的句柄

private Socket client; // 客户端套接字

private BufferedReader reader;

private PrintWriter writer;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_login);

intent = this.getIntent();

account = (EditText) this.findViewById(R.id.login_account);

passwpord = (EditText) this.findViewById(R.id.login_password);

login = (Button) this.findViewById(R.id.login_button);

register = (TextView) this.findViewById(R.id.login_register);

register.setClickable(true); // 设置可作为按键触摸

// 设置登录按键事件

login.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

useraccount = account.getText().toString();

userpassword = account.getText().toString();

// 判断账号填写是否为空

if (Regex.isEmpty(useraccount)) {

Toast.makeText(getApplicationContext(), "请填写用户账号！",

Toast.LENGTH_SHORT).show();

}

// 判断账号是否符合邮件格式

else if (Regex.isEmail(useraccount)) {

Toast.makeText(getApplicationContext(), "用户账号格式不正确！",

Toast.LENGTH_SHORT).show();

}

// 判断密码是否为空

else if (Regex.isEmpty(userpassword)) {

Toast.makeText(getApplicationContext(), "请填写密码！",

Toast.LENGTH_SHORT).show();

} else {

System.out.println("Client：Connecting");

m_Dialog = ProgressDialog.show(Login.this, "提示", "登录中...",true);

// 创建一个新的线程

new Thread(new Runnable() {

int flag = 0; // 标志位，0表示登录成功，1表示登录失败

int mark = 0;

// 登录一系列操作，基于自定义的EMSP协议

@Override

public void run() {

try {

// 创建一个Socket对象，并指定服务端的IP及端口号

System.out.println("new Socket('', 6666);");

// 创建一个Socket对象，并指定服务端的IP及端口号

client = new Socket(ServerInfo.sockethost, ServerInfo.socketport);

System.out.println("Socket 'client' created.");

String command = null;

System.out.println("new reader.");

// 输入输出流读写器

reader = new BufferedReader(

new InputStreamReader(client.getInputStream()));

System.out.println("new writer.");

writer = new PrintWriter(client.getOutputStream(), true);

// 登录第一步，向服务器发送登录请求，C:login

writer.println("login");

while ((command = reader.readLine()) != null) {

System.out.println("++++mark = " + mark);

System.out.println("我在while里");

StringTokenizer stk = new StringTokenizer(command);

String cmd = stk.nextToken();

System.out.println("cmd:" + cmd);

if (cmd.equals("user")) {

writer.println(useraccount);

System.out

.println("writer.println('useraccount');");

} else if (cmd.equals("pass")) {

writer.println(userpassword);

System.out

.println("writer.println('userpassword');");

} else if (cmd.equals("inexist")) {

writer.println(useraccount);

System.out

.println("inexist, writer.println('username');");

} else if (cmd.equals("error")) {

writer.println(useraccount);

System.out

.println("error, writer.println('username');");

} else if (cmd.equals("loginok")) {

System.out.println("case 'loginok'");

mark = 1;

System.out.println("========mark = "

+ mark);

break;

}

}

System.out.println("至此，登录成功，flag=0");

// 至此，登录成功，flag=0

} catch (Exception e) {

flag = 1; // 登录失败

e.printStackTrace();

} finally {

try {

if (client != null)

client.close();

} catch (IOException e) {

e.printStackTrace();

}

}

// 开辟一个新线程反馈登录是否成功

m_Handler.post(new Runnable() {

@Override

public void run() {

if (flag == 0) {

// 全局变量记录用户名和密码

ServerInfo.username = useraccount;

ServerInfo.password = userpassword;

// 跳转到主界面列表

intent.setClass(Login.this,

MainActivity.class);

Bundle bundle = new Bundle();

bundle.putString("username",

useraccount);

bundle.putString("password",

userpassword);

intent.putExtras(bundle);

startActivity(intent);

Login.this.finish();

System.out

.println("Client: Login succeed!");

Toast.makeText(getApplicationContext(),

"登录成功!", Toast.LENGTH_SHORT)

.show();

} else {

Toast.makeText(getApplicationContext(),

"登录失败!", Toast.LENGTH_SHORT)

.show();

}

}

});

m_Dialog.dismiss(); // 从屏幕上消除Dialog

}

}).start();

}

}

});

// 设置触摸“注册新用户”后响应事件

register.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

intent.setClass(Login.this, Register.class);

startActivity(intent);

Login.this.finish();

}

});

}

}

服务器端(只粘贴部分关键代码)：

public class tempEMSP implements Runnable {

private Socket socket;

private ZenMailServerService dbm;

private BufferedReader bffreader = null;

private PrintStream print = null;

private String username;

public tempEMSP(Socket socket, ZenMailServerService dbm) throws IOException {

this.socket = socket;

this.dbm = dbm;

bffreader = new BufferedReader(new InputStreamReader(

socket.getInputStream()));

print = new PrintStream(socket.getOutputStream());

}

@Override

public void run() {

// TODO Auto-generated method stub

print.println("emsp Service is OK");

String command;

boolean auth = false;

String stat = null;

stat = "login";

boolean login = false;

try {

while ((command = bffreader.readLine()) != null) {

StringTokenizer stk = new StringTokenizer(command);

switch (stk.nextToken()) {

case "login":

System.out.println("==========EMSP Server To Client : login");

loginRespon();

break;

case "register":

registerRespon();

break;

case "modify":

modifyRespon();

break;

case "outbox":

outboxRespon();

break;

case "inbox":

inboxRespon();

break;

case "contact":

contactRespon();

break;

case "black":

blackRespon();

break;

case "quit":

quitRespon();

break;

default:

break;

}

}

} catch (IOException e) {

e.printStackTrace();

}

}

private void loginRespon() throws IOException {

System.out.println("==========EMSP Server To Client : loginRespon()");

print.println("user");

System.out.println("==========EMSP Server To Client : print.println('user');");

String command;

while ((command = bffreader.readLine()) != null) {

System.out.println("==========EMSP Server To Client : command="+ command);

StringTokenizer stk = new StringTokenizer(command);

String cmd = stk.nextToken();

System.out.println("==========EMSP Server To Client : cmd="+ cmd);

if (cmd.equals("quit"))

return;

if (this.dbm.isExistUser(cmd)) {

username = cmd;

System.out.println("this.dbm.isExistUser(cmd), username="+username);

print.println("pass");

System.out.println("EMSP Server:print.println('pass');");

StringTokenizer stk1 = new StringTokenizer(bffreader.readLine());

String pass = stk1.nextToken();

System.out.println("EMSP Server: String pass =" + pass);

if (this.dbm.getPassword(cmd).equals(pass)) {

System.out.println("print.println('loginok');");

print.println("loginok");

// bffreader.close();//2015.6.11

// print.close();

return;

} else {

print.println("user"); // 重头输入用户名

}

} else {

print.println("inexist");

}

}

}

}

之前去请教过一些同学，有一个同学指出是因为Android编码的问题，不知道大虾们火眼金睛有何见解？这个问题困扰我整整一个星期了(:з」∠)