异常android系统中的TCP客户端连接到TCP的Java服务器 [英] Exception in connecting android TCP-client to java TCP-server
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问题描述
我写了code在Java TCP服务器,并在Java中使用TCP客户端测试和它的工作很好,但是当我已经写在Android上的TCP服务器,我得到这个异常:
09-06 15:15:37.792:ERROR / ClientActivity(444):java.net.SocketException异常:权限被拒绝
09-06 15:15:37.792:ERROR / ClientActivity(444):在org.apache.harmony.luni.platform.OSNetworkSystem.socket(本机方法)
09-06 15:15:37.792:ERROR / ClientActivity(444):在dalvik.system.BlockGuard $ WrappedNetworkSystem.socket(BlockGuard.java:335)
09-06 15:15:37.792:ERROR / ClientActivity(444):在org.apache.harmony.luni.net.PlainSocketImpl.create(PlainSocketImpl.java:216)
09-06 15:15:37.792:ERROR / ClientActivity(444):在java.net.Socket.startupSocket(Socket.java:698)
09-06 15:15:37.792:ERROR / ClientActivity(444):在java.net.Socket.tryAllAddresses(Socket.java:150)
09-06 15:15:37.792:ERROR / ClientActivity(444):在java.net.Socket中的<&初始化GT;(Socket.java:209)。
09-06 15:15:37.792:ERROR / ClientActivity(444):在java.net.Socket中的<&初始化GT;(Socket.java:176)。
09-06 15:15:37.792:ERROR / ClientActivity(444):在socket.android.ClientActivity $ ClientThread.run(ClientActivity.java:52)
09-06 15:15:37.792:ERROR / ClientActivity(444):在java.lang.Thread.run(Thread.java:1019)
code对Java TCP服务器:
包messenger.classes;
进口java.io.IOException异常;
进口java.net.ServerSocket的;
进口的java.net.Socket;
进口的java.util.Map;
进口java.util.concurrent.ConcurrentHashMap中;进口messenger.handlers.ClientHandler;
公共类服务器{
公共静态最终诠释PORT = 8111; 公共静态无效的主要(字符串ARGS []){
最终地图<弦乐,ClientHandler的>客户=新的ConcurrentHashMap<弦乐,ClientHandler的>(); 尝试{
ServerSocket的SS =新的ServerSocket(PORT);
的System.out.println(服务器开始侦听端口+ PORT);
为(Socket套接字= ss.accept();插座=无效;!插座= ss.accept()){
Runnable接口处理器=新ClientHandler的(插座,客户端);
新的线程(处理器)。开始();
}
}赶上(IOException异常五){
e.printStackTrace(); }
}
}
code为Android TCP客户端:
包socket.android;
进口java.io.BufferedWriter中;
进口java.io.OutputStreamWriter中;
进口的java.io.PrintWriter;
进口java.net.InetAddress中;
进口的java.net.Socket;进口android.app.Activity;
进口android.os.Bundle;
进口android.os.Handler;
进口android.util.Log;
进口android.view.View;
进口android.view.View.OnClickListener;
进口android.widget.Button;公共类ClientActivity延伸活动{
私人按钮connectPhones;
私人字符串serverIpAddress =;
连接= FALSE私人布尔;
私人处理程序处理程序=新的处理程序(); @覆盖
保护无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.main);
connectPhones =(按钮)findViewById(R.id.btnConnect);
connectPhones.setOnClickListener(connectListener);
} 私人OnClickListener connectListener =新OnClickListener(){ @覆盖
公共无效的onClick(视图v){
如果(!连){
螺纹cThread =新主题(新ClientThread());
cThread.start();
}
}
}; 公共类ClientThread实现Runnable { 公共无效的run(){
尝试{
Log.d(ClientActivity,C:连接...);
Socket套接字=新的Socket(127.0.0.1,8111);
连接= TRUE;
而(连接){
尝试{
Log.d(ClientActivity,C:发送命令。);
为PrintWriter了=的新PrintWriter(新的BufferedWriter(新OutputStreamWriter(插座
.getOutputStream())),TRUE);
通过out.println(嘿服务器!);
Log.d(ClientActivity,C:发送。);
}赶上(例外五){
Log.e(ClientActivity,S:错误,E);
}
}
socket.close();
Log.d(ClientActivity,C:关闭。);
}赶上(例外五){
Log.e(ClientActivity,C:错误,E);
连接= FALSE;
}
}
}
}
什么是这个问题,怎么解决呢?
编辑:新的错误:
09-06 15:33:57.533:ERROR / ClientActivity(557):java.net.ConnectException:/127.0.0.1:8014 - 连接被拒绝
09-06 15:33:57.533:ERROR / ClientActivity(557):在org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:207)
09-06 15:33:57.533:ERROR / ClientActivity(557):在org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)
09-06 15:33:57.533:ERROR / ClientActivity(557):在java.net.Socket.startupSocket(Socket.java:705)
09-06 15:33:57.533:ERROR / ClientActivity(557):在java.net.Socket.tryAllAddresses(Socket.java:150)
09-06 15:33:57.533:ERROR / ClientActivity(557):在java.net.Socket中的<&初始化GT;(Socket.java:209)。
09-06 15:33:57.533:ERROR / ClientActivity(557):在java.net.Socket中的<&初始化GT;(Socket.java:176)。
09-06 15:33:57.533:ERROR / ClientActivity(557):在socket.android.ClientActivity $ ClientThread.run(ClientActivity.java:48)
09-06 15:33:57.533:ERROR / ClientActivity(557):在java.lang.Thread.run(Thread.java:1019)
解决方案
也许缺少INTERNET权限?
I wrote code for tcp-server in java, and tested with tcp-client in java and it worked well, but when I have written a tcp-server in android, I got this exception :
09-06 15:15:37.792: ERROR/ClientActivity(444): java.net.SocketException: Permission denied
09-06 15:15:37.792: ERROR/ClientActivity(444): at org.apache.harmony.luni.platform.OSNetworkSystem.socket(Native Method)
09-06 15:15:37.792: ERROR/ClientActivity(444): at dalvik.system.BlockGuard$WrappedNetworkSystem.socket(BlockGuard.java:335)
09-06 15:15:37.792: ERROR/ClientActivity(444): at org.apache.harmony.luni.net.PlainSocketImpl.create(PlainSocketImpl.java:216)
09-06 15:15:37.792: ERROR/ClientActivity(444): at java.net.Socket.startupSocket(Socket.java:698)
09-06 15:15:37.792: ERROR/ClientActivity(444): at java.net.Socket.tryAllAddresses(Socket.java:150)
09-06 15:15:37.792: ERROR/ClientActivity(444): at java.net.Socket.<init>(Socket.java:209)
09-06 15:15:37.792: ERROR/ClientActivity(444): at java.net.Socket.<init>(Socket.java:176)
09-06 15:15:37.792: ERROR/ClientActivity(444): at socket.android.ClientActivity$ClientThread.run(ClientActivity.java:52)
09-06 15:15:37.792: ERROR/ClientActivity(444): at java.lang.Thread.run(Thread.java:1019)
Code for java TCP-server :
package messenger.classes;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import messenger.handlers.ClientHandler;
public class Server{
public static final int PORT=8111;
public static void main(String args[]){
final Map<String, ClientHandler> clients =new ConcurrentHashMap<String, ClientHandler>();
try {
ServerSocket ss=new ServerSocket(PORT);
System.out.println("Server starts listening on PORT "+PORT);
for(Socket socket=ss.accept();socket!=null;socket=ss.accept()){
Runnable handler = new ClientHandler(socket,clients);
new Thread(handler).start();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
code for android TCP-client :
package socket.android;
import java.io.BufferedWriter;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class ClientActivity extends Activity {
private Button connectPhones;
private String serverIpAddress = "";
private boolean connected = false;
private Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
connectPhones = (Button) findViewById(R.id.btnConnect);
connectPhones.setOnClickListener(connectListener);
}
private OnClickListener connectListener = new OnClickListener() {
@Override
public void onClick(View v) {
if (!connected) {
Thread cThread = new Thread(new ClientThread());
cThread.start();
}
}
};
public class ClientThread implements Runnable {
public void run() {
try {
Log.d("ClientActivity", "C: Connecting...");
Socket socket = new Socket("127.0.0.1", 8111);
connected = true;
while (connected) {
try {
Log.d("ClientActivity", "C: Sending command.");
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket
.getOutputStream())), true);
out.println("Hey Server!");
Log.d("ClientActivity", "C: Sent.");
} catch (Exception e) {
Log.e("ClientActivity", "S: Error", e);
}
}
socket.close();
Log.d("ClientActivity", "C: Closed.");
} catch (Exception e) {
Log.e("ClientActivity", "C: Error", e);
connected = false;
}
}
}
}
what is the problem in that, and how to solve it ?
EDIT: new error :
09-06 15:33:57.533: ERROR/ClientActivity(557): java.net.ConnectException: /127.0.0.1:8014 - Connection refused
09-06 15:33:57.533: ERROR/ClientActivity(557): at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:207)
09-06 15:33:57.533: ERROR/ClientActivity(557): at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)
09-06 15:33:57.533: ERROR/ClientActivity(557): at java.net.Socket.startupSocket(Socket.java:705)
09-06 15:33:57.533: ERROR/ClientActivity(557): at java.net.Socket.tryAllAddresses(Socket.java:150)
09-06 15:33:57.533: ERROR/ClientActivity(557): at java.net.Socket.<init>(Socket.java:209)
09-06 15:33:57.533: ERROR/ClientActivity(557): at java.net.Socket.<init>(Socket.java:176)
09-06 15:33:57.533: ERROR/ClientActivity(557): at socket.android.ClientActivity$ClientThread.run(ClientActivity.java:48)
09-06 15:33:57.533: ERROR/ClientActivity(557): at java.lang.Thread.run(Thread.java:1019)
解决方案
Perhaps missing INTERNET permission?
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