我开发了一个项目，当客户端与客户端连接时，服务器正在向客户端发送图像。
我想将所有可用图像发送到特定文件夹。但是发送完一个图像套接字后，它会自动关闭，并且异常。
服务器端代码。
public class ServerLargeImage {
public String folderPath;
static Activity activity;
private static ServerLargeImage m_instance;
public ServerLargeImage() {
m_instance = this;
}
public static ServerLargeImage instance() {
if (m_instance == null) {
m_instance = new ServerLargeImage();
}
return m_instance;
}
static final int SocketServerPORT = 8080;
ServerSocket serverSocket;
ServerSocketThread serverSocketThread;
public void startSocket(Activity activity) {
this.activity = activity;
serverSocketThread = new ServerSocketThread();
serverSocketThread.start();
}
/**
* @return IP address of Device
*/
public String getIpAddress() {
String ip = "";
try {
Enumeration<NetworkInterface> enumNetworkInterfaces = NetworkInterface
.getNetworkInterfaces();
while (enumNetworkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = enumNetworkInterfaces
.nextElement();
Enumeration<InetAddress> enumInetAddress = networkInterface
.getInetAddresses();
while (enumInetAddress.hasMoreElements()) {
InetAddress inetAddress = enumInetAddress.nextElement();
if (inetAddress.isSiteLocalAddress()) {
ip += ""
+ inetAddress.getHostAddress() + "\n";
}
}
}
} catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
ip += "Something Wrong! " + e.toString() + "\n";
}
return ip;
}
/**
* We are using this method to update current folder path
*
* @param folderPath: Folder path of images
*/
public void updateFolderPath(String folderPath) {
this.folderPath = folderPath;
}
public class ServerSocketThread extends Thread {
@Override
public void run() {
Socket socket = null;
try {
serverSocket = new ServerSocket(SocketServerPORT);
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
Log.e("ServerLargeImage", "I'm waiting here: "
+ serverSocket.getLocalPort());
}
});
while (true) {
socket = serverSocket.accept();
FileTxThread fileTxThread = new FileTxThread(socket);
fileTxThread.start();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (socket != null) {
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
public class FileTxThread extends Thread {
Socket socket;
long currentTime;
FileTxThread(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
//Folder path and all file path inside that
File file = new File(Environment.getExternalStorageDirectory(), folderPath);
File[] pictures = file.listFiles();
//send first image to client
sendAllImageToClient(pictures, 0);
}
public void sendAllImageToClient(File[] pictures, int currentIndex) {
//Current time when the process start
currentTime = System.currentTimeMillis();
if (socket.isClosed()) {
try {
socket = serverSocket.accept();
} catch (IOException e) {
e.printStackTrace();
}
}
//Calculating size of file and preparing byte array of same size
byte[] bytes = new byte[(int) pictures[currentIndex].length()];
//Sending image file with Buffered Input Stream
BufferedInputStream bis;
try {
bis = new BufferedInputStream(new FileInputStream(pictures[currentIndex]));
bis.read(bytes, 0, bytes.length);
ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());
oos.writeObject(bytes);
// oos.flush();
final String sentMsg = "File sent to: " + socket.getInetAddress();
// socket.close();
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(activity,
sentMsg,
Toast.LENGTH_LONG).show();
}
});
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//Print time difference of sending each image
Log.e("time difference", currentIndex + " " + (System.currentTimeMillis() - currentTime) / 1000 + " sec");
//Print size of image
Log.e("File Size", currentIndex + " " + getFolderSizeLabel(pictures[currentIndex]));
/**
* Send Next image to client server
*/
if ((currentIndex + 1) < pictures.length) {
sendAllImageToClient(pictures , ++currentIndex);
}
}
}
/**
* @param file: File path
* @return
*/
public static String getFolderSizeLabel(File file) {
long size = getFolderSize(file) / 1024; // Get size and convert bytes into Kb.
if (size >= 1024) {
return (size / 1024) + " Mb";
} else {
return size + " Kb";
}
}
/**
* @param file : File path
* @return : Size of folder and inner files
*/
public static long getFolderSize(File file) {
long size = 0;
if (file.isDirectory()) {
for (File child : file.listFiles()) {
size += getFolderSize(child);
}
} else {
size = file.length();
}
return size;
}
/**
* You can use this method to stop socket while closing your application
*/
public void onDestroy() {
if (serverSocket != null) {
try {
serverSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
//客户端代码
public class ClientLargeImage {
static Activity activity;
private static ClientLargeImage m_instance;
public ClientLargeImage() {
m_instance = this;
}
public static ClientLargeImage instance() {
if (m_instance == null) {
m_instance = new ClientLargeImage();
}
return m_instance;
}
static final int SocketServerPORT = 8080;
public void connect(Activity activity, String ip_address) {
this.activity = activity;
ClientRxThread clientRxThread =
new ClientRxThread(
ip_address,
SocketServerPORT);
clientRxThread.start();
}
private class ClientRxThread extends Thread {
String dstAddress;
int dstPort;
ClientRxThread(String address, int port) {
dstAddress = address;
dstPort = port;
}
@Override
public void run() {
Socket socket = null;
try {
socket = new Socket(dstAddress, dstPort);
File file = new File(
Environment.getExternalStorageDirectory(),
"/Test");
if(!file.exists()){
file.mkdir();
}
ObjectInputStream ois = new
ObjectInputStream(socket.getInputStream());
byte[] bytes;
FileOutputStream fos = null;
try {
bytes = (byte[]) ois.readObject();
long time= System.currentTimeMillis();
fos = new FileOutputStream(file+"/"+time+".png");
fos.write(bytes);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (fos != null) {
// fos.close();
}
}
// socket.close();
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(activity,
"Finished",
Toast.LENGTH_LONG).show();
}
});
} catch (IOException e) {
e.printStackTrace();
final String eMsg = "Something wrong: " + e.getMessage();
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(activity,
eMsg,
Toast.LENGTH_LONG).show();
}
});
} finally {
if (socket != null) {
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
}
请检查您是否了解套接字编程。