我正在尝试从andriod 连接到简单的java 服务器。服务器正在运行，如果我确实从 adb 连接，请查看连接 adb connect 127.0.0.1:4444
甚至使用 pc ip adb connect 192.168.1.104:4444
但android得到java.net.SocketException:套接字失败:EACCES(权限被拒绝)。 PC和Android在单个WIFI路由器中。
我的服务器
public class Server {
private static ServerSocket serverSocket;
private static Socket clientSocket;
private static InputStreamReader inputStreamReader;
private static BufferedReader bufferedReader;
private static String message;
private static String serverIp = "10.0.2.15";
public static void main(String[] args) {
try {
serverIp = getServerIp();
if(serverIp != null){
System.out.println("Listenning on IP:" + serverIp);
}
serverSocket = new ServerSocket(4444); // Server socket
} catch (IOException e) {
System.out.println("Could not listen on port: 4444 " + e.toString());
}
System.out.println("Server started. Listening to the port 4444");
while (true) {
try {
clientSocket = serverSocket.accept(); // accept the client connection
if(clientSocket.getInputStream().read() != -1){
System.out.println("Socket connection");
} else {
System.out.println("Client disconected");
}
inputStreamReader = new InputStreamReader(clientSocket.getInputStream());
bufferedReader = new BufferedReader(inputStreamReader); // get the client message
message = bufferedReader.readLine();
System.out.println(message);
inputStreamReader.close();
clientSocket.close();
} catch (IOException ex) {
System.out.println("Problem in message reading " + ex.toString());
}
}
}
public static String getServerIp(){
try{
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
en.hasMoreElements();){
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAdress = intf.getInetAddresses();
enumIpAdress.hasMoreElements();){
InetAddress inetAddress = enumIpAdress.nextElement();
if(!inetAddress.isLoopbackAddress()){
return inetAddress.getHostAddress().toString();
}
}
}
} catch (SocketException e){
System.out.println(e.toString());
}
return null;
}
}
MyClient 连接
public class ServerConnection extends AsyncTask<SocketAddress, String, String> {
@Override
protected String doInBackground(SocketAddress... params) {
try {
mSocket = new Socket("127.0.0.1", 4444);//test ip
//192.168.1.104:4444 - real ip of the server returns the same
PrintWriter printwriter = new PrintWriter(mSocket.getOutputStream(), true);
printwriter.write("this is test"); // write the message to output stream
printwriter.flush();
printwriter.close();
mSocket.close();
Log.i(LOG_TAG, "Socket connecting to " + params[0].toString());
return null;
} catch (IOException e) {
e.printStackTrace();
Log.i(LOG_TAG, "===================ERROR====================" +
"\n" +
e.toString());
return e.toString();
}
}
}
list
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.stas.clientserverconnection" >
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
mSocket = new Socket("127.0.0.1", 4444) 行出现异常
我做错了什么？
最佳答案
权限正常，但问题由 @JonasCz 指示
mSocket = new Socket("127.0.0.1", 4444)
您无权从您的设备访问 127.0.0.1!
关于java - Android Socket 连接(权限被拒绝)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30383775/