为什么只有Android版上接收C#TCP套接字2896个字节? [英] why android only receive 2896 bytes on c# tcp socket?
本文介绍了为什么只有Android版上接收C#TCP套接字2896个字节?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
C#使用TCP套接字发送短信到Android:
c# Use tcp socket Send message to Android:
string data = "my message....";
byte[] msg = Encoding.UTF8.GetBytes(data);
//for example msg Length is 5210 bytes
client.socket.SendBufferSize = 500000;
socket.Send(msg, msg.Length, SocketFlags.None);
Android的接收消息从C#服务器端:
Android receive message from c# server-side:
socket = new Socket(ServerIP, ServerPort);
socket.setReceiveBufferSize(500000);
isReceive = true;
receiveThread = new ReceiveThread(socket);
receiveThread.start();
private class ReceiveThread extends Thread{
private InputStream inStream = null;
ReceiveThread(Socket socket){
inStream = socket.getInputStream();
}
@Override
public void run(){
while(isReceive){
byte[] buffer = new byte[99999];
try {
//only receive 2896 bytes?
int size = inStream.read(buffer);
} catch (IOException e) {
unConnSocket();
}
}
}
}
为什么大小只能收到2896个字节?
why the size only receive 2896 bytes?
推荐答案
您的Android code无法知道C#code为多少字节的发送方式。 inStream.read()
正在读仅是目前可用的那一刻插槽上的字节数。你应该有C#code发送字符串数据之前发送字符串的长度,从而使Android的code知道多少字节期望,例如:
Your Android code has no way of knowing how many bytes the C# code is sending. inStream.read()
is reading only the bytes that are currently available on the socket at that moment. You should have the C# code send the string length before sending the string data, so that the Android code knows how many bytes to expect, eg:
string data = "my message....";
byte[] dataBytes = Encoding.UTF8.GetBytes(data);
int dataLen = IPAddress.HostToNetworkOrder(dataBytes.Length);
byte[] dataLenBytes = BitConverter.GetBytes(dataLen);
socket.Send(dataLenBytes);
socket.Send(dataBytes);
private class ReceiveThread extends Thread
{
private DataInputStream inStream = null;
ReceiveThread(Socket socket)
{
inStream = new DataInputStream(socket.getInputStream());
}
@Override
public void run()
{
while (isReceive)
{
try
{
String s;
int size = inStream.readInt();
if (size > 0)
{
byte[] buffer = new byte[size];
inStream.readFully(buffer);
s = new String(buffer, "UTF-8");
}
else
s = "";
// use s as needed ...
}
catch (IOException e)
{
unConnSocket();
}
}
}
}
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