Android Emulator UDP 无法接收；在手机上工作正常 [英] Android Emulator UDP cannot receive; works fine on phone
问题描述
您好，我正在尝试连接到网络上的盒子.它上面有一个工作的 UDP 服务器.使用下面的代码，我可以与盒子通信并从我的手机发送/接收 UDP 数据包.但是，我无法弄清楚如何使用 android 模拟器进行设置.我在 StackOverflow 以及其他不走运的论坛上阅读了很多内容.我在 Windows 8 上
Hello I am trying to connect to a box that is on the network. It has a working UDP server on it. With the code below I am able to communicate with the box and send/receive UDP packets from my phone. However, I cannot figure out how to setup using the android emulator. I've read a lot on StackOverflow as well as other forums with not luck. I am on windows 8
安卓代码:
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import android.os.Handler;
import android.util.Log;
public class udp implements Runnable {
// Private variable
private String IPServer = "10.0.2.2"; // For Emulator
//private String IPServer = "255.255.255.255"; // For Phone
private int portServer = 6286;
private int portDestin = 4381;
private InetAddress serverAddr;
private InetAddress localAddr;
private DatagramSocket socketSend;
private DatagramSocket socketList;
private DatagramPacket packetSend;
private DatagramPacket packetList;
private Handler uiHandler;
public udp(){
};
public void send() {
// Retrieve the server name
try {
Log.d("UDP", "Creating InetAddress");
serverAddr = InetAddress.getByName(IPServer);
} catch (Exception e) {
Log.e("UDP", "InetAddress Error:", e);
}
// Create UDP sockets
try {
Log.d("UDP", "Creating Sockets");
socketSend = new DatagramSocket(portServer);
socketList = new DatagramSocket(portDestin);
}
catch(Exception e) {
Log.e("UDP", "DatagramSocket Error:", e);
}
// Sets socket to broadcast
try {
Log.d("UDP", "SetBroadcast");
socketSend.setBroadcast(true);
}
catch(Exception e) {
Log.e("UDP", "SetBroadcast Error:", e);
}
// Create UDP packets
try {
Log.d("UDP", "Creating packets");
byte[] dataSend = new byte[32];
byte[] dataRead = new byte[32];
String msg = "Packet Broadcast";
dataSend = msg.getBytes();
packetSend = new DatagramPacket(dataSend, dataSend.length, serverAddr, portDestin);
packetList = new DatagramPacket(dataRead, dataRead.length, serverAddr, portDestin);
}
catch(Exception e) {
Log.e("UDP", "DatagramPacket Error:", e);
}
// Send packet
try {
Log.d("UDP", "Sending packet");
socketSend.send(packetSend);
}
catch(Exception e) {
Log.e("UDP", "Send Error:", e);
}
// Receive packet
Log.d("UDP", "Receiving packet");
for(int i=0; i<2; i++)
{
try {
socketList.receive(packetList);
}
catch(Exception e) {
Log.e("UDP", "Receive Error:", e);
}
String packetRec = new String(packetList.getData());
Log.d("UDP", "Received: "+packetRec);
}
socketSend.close();
socketList.close();
}
@Override
public void run() {
// TODO Auto-generated method stub
}
}
我需要向全网广播；这就是为什么我使用 255.255.255.255 但对于 android 我读到它不起作用，我在模拟器中打开设置并找到我的 IP 到上面的那个.
I need to broadcast to the entire network; that is why Im using 255.255.255.255 but for android I read that it doesn't work and I opened settings in the Emulator and found my IP to the one above.
我也移植了redir
telnet localhost 5554
redir add udp:4381:4381
手机登录:
02-11 12:01:09.743: D/UDP(17253): Creating InetAddress
02-11 12:01:09.743: D/UDP(17253): Creating Sockets
02-11 12:01:09.753: D/UDP(17253): SetBroadcast
02-11 12:01:09.753: D/UDP(17253): Creating packets
02-11 12:01:09.753: D/UDP(17253): Sending packet
02-11 12:01:09.753: D/UDP(17253): Receiving packet
02-11 12:01:09.753: D/UDP(17253): Received: Packet Broadcast????????????
02-11 12:01:09.763: D/UDP(17253): Received: ??????PACKETSTUFF???????????fP*
来自安卓模拟器的日志:
log from android emulator:
02-11 20:00:22.742: D/UDP(1201): Creating InetAddress
02-11 20:00:22.742: D/UDP(1201): Creating Sockets
02-11 20:00:22.752: D/UDP(1201): SetBroadcast
02-11 20:00:22.772: D/UDP(1201): Creating packets
02-11 20:00:22.772: D/UDP(1201): Sending packet
02-11 20:00:22.772: D/UDP(1201): Receiving packet
02-11 20:00:22.772: D/UDP(1201): Received: Packet Broadcast????????????????????
提前致谢
更新:
我目前得到了它，以便我的模拟器可以使用 UDP 转发器 NetworkActiv AUTAPF 在主机外部发送数据包.它发出我的 UDP，但它不转发响应.有谁知道我应该将目标响应发送到哪里?
I currently got it so that my emulator can send a packet outside the host computer using a UDP forwarder NetworkActiv AUTAPF. It sends out my UDP but it doesn't not forward the response. Does anyone know where I should send the destination response to?
推荐答案
你无法将你的安卓模拟器直接连接到网络上的任何物理设备.
Android Emulator 创建自己的LAN，并且每个模拟器实例都有一个具有相同 IP 的新 LAN 实例(这没关系，因为它们不能互相访问)
Android Emulator creates its own LAN and each emulator instance a new LAN instance with the same IPs (This is OK because they can't access each other)
如果您坚持使用 Emulator 与 Box 通信，您应该在您的 PC 上创建一个 UDP 代理套接字(使用 JAVA 、 C# 、 C++ 、 VB ... 或任何您想要的桌面编程语言)
If you insist on using the Emulator to communicate with the Box , you should create a UDP proxy socket on your PC (Using JAVA , C# , C++ , VB ... or any desktop programming language you want)
他们让您的桌面应用程序运行
They way your Desktop App Will Work
- 稍后获取您的 LAN 子网以确定数据包来源.
- 为您的服务器使用的端口启动一个 UDP 侦听器.
- 如果发件人是模拟器，则查找发件人的 IP 地址(有相应的 API)，使用盒子 IP 将该数据包重新发送到盒子
在 Android 的开发者网站上有一个很好的演示.
There is a good demonistration on the subject on Android's developers website.
请看这里
祝你好运
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