我在Android手机上用Java编写了这段代码：
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.Set;
import java.util.logging.Handler;
public class Connection extends Thread {
private boolean isBinded = false;
private String IpAddress;
private Context cx;
private int num;
//private Socket socket;
private InputStreamReader inRead;
public ServerSocketChannel server;
private volatile boolean isRunning =true;
private File fileRecieved =null;
private FileOutputStream fos =null;
private BufferedOutputStream bos =null;
private File photoDir=null;
private ByteBuffer bufferByteSize=null;
private ByteBuffer bufferByte=null;
private MediaPlayer playMe=null;
private byte [] bytesToSend = null;
private MainActivity myActivity=null;
private Handler handler =null;
public Connection(String IpAddress, Context cx) {
this.IpAddress = IpAddress;
this.cx = cx;
myActivity = new MainActivity();
this.playMe = new MediaPlayer().create(cx, R.raw.sound1);
photoDir = new File(Environment.getExternalStorageDirectory(), "/RecievedPhotoes");
if (!photoDir.exists())
photoDir.mkdir();
}
@Override
public void run() {
Looper.prepare();
ToastHandler th = new ToastHandler(cx);//Toast handler is a class to handle toasts from threads
try {
Selector selector = Selector.open();
int[] ports = {5050, 4001, 6000};
// for (int port : ports) {
server = ServerSocketChannel.open();
server.configureBlocking(false);
server.socket().bind(new InetSocketAddress(IpAddress, 5050));
server.register(selector, SelectionKey.OP_ACCEPT);
Log.d("msg", "1111");
th.showToast("Registered", 1000);
// }
while (true) {
Log.d("Selector : ", "selector.isOpen()");
selector.select();
Log.d("Selector : ", "selector.select()");
Set selectedkeys = selector.selectedKeys();
Log.d("Selector : ", "selector.selectedKeys();");
Iterator iterator = selectedkeys.iterator();
Log.d("Selector : ", "selectedkeys.iterator();");
while (iterator.hasNext()) {
SelectionKey key = (SelectionKey) iterator.next();
Log.d("Selector : ", "iterator hasNext");
if (key.isAcceptable()) {
th.showToast("Accepted succefuuly ",1000);
SocketChannel client = server.accept();
if (client != null) {
client.configureBlocking(false);
client.register(selector, SelectionKey.OP_READ);
bufferByteSize = ByteBuffer.allocate(1024);
client.read(bufferByteSize);
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss");
String currentDate = sdf.format(new Date());
fileRecieved = new File(Environment.getExternalStorageDirectory(), photoDir+"/new_"+ currentDate+".jpg");
fos = new FileOutputStream(fileRecieved);
bos = new BufferedOutputStream(fos);
bufferByte = ByteBuffer.allocate(bufferByteSize.getInt());
client.read(bufferByte);
byte [] recevedData = new byte[bufferByteSize.getInt()];
bufferByte.get(recevedData);
bos.write(recevedData);
bos.flush();
bufferByteSize.clear();
bufferByte.clear();
if (client!= null) client.close();
int NotifID = 001;
Intent i = new Intent(cx, NotificationClass.class);
i.putExtra("NotifID", NotifID);
displayMyNotification mnotifyMe = new displayMyNotification(i, playMe, cx.getResources(), cx, NotifID);
mnotifyMe.start();
}
InputStreamReader(socket.getInputStream());
}
}
}
} catch (Exception e) {
th.showToast("Error" + e.getMessage().toString(),1000);
}
finally {
if (fos != null) try {
fos.close();
} catch (IOException e) {
th.showToast("Error" + e.getMessage().toString(),1000);
}
if (bos != null) try {
bos.close();
} catch (IOException e) {
th.showToast("Error" + e.getMessage().toString(),1000);
}
}
}
}
我在PC上用Java编写了这段代码：
import com.sun.corba.se.spi.oa.OADefault;
import com.sun.xml.internal.stream.util.BufferAllocator;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.Socket;
import java.net.SocketAddress;
import java.util.Scanner;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;
import sun.java2d.pipe.BufferedBufImgOps;
/**
*
* @author laptop home
*/
public class Client {
public static void main(String args[]) throws IOException {
Socket s = null;
File file_to_send = null;
byte [] bytes_to_send = null;
FileInputStream fis = null;
BufferedInputStream bis = null;
OutputStream os = null;
try {
file_to_send = new File("C:\\Users\\laptop home\\Desktop\\yblutooth\\secureSyS\\lightbulb-png-825.png");
bytes_to_send = new byte [(int)file_to_send.length()];
fis = new FileInputStream(file_to_send);
bis = new BufferedInputStream(fis);
bis.read(bytes_to_send, 0, bytes_to_send.length);
s = new Socket("192.168.3.100", 5050);
System.out.println(s.toString());
Scanner sc = new Scanner(System.in);
System.out.print("Send File "+file_to_send.getPath().toString()+"??");
sc.next();
os = s.getOutputStream();
os.write(bytes_to_send.length);
os.flush();
os.write(bytes_to_send, 0, bytes_to_send.length);
os.flush();
}
catch (Exception e ) {
System.out.println(e);
}
finally{
if (s!=null){
s.close();
}
}
}
}
我想将PC上的Java程序中的照片发送到Android程序。当我启动Android应用程序并运行该线程时，没有任何反应（等待新频道准备就绪）。
当我在PC上启动Java程序时，它告诉我它已与电话成功连接，并在此处打印提示：
System.out.print("Send File "+file_to_send.getPath().toString()+"??");
当我输入任何文本并按 Enter 时，程序将以绿色提示"Build Successfull...etc"结束，没有错误。
我去检查文件夹＆＃34; RecievedPhotoes＆＃34;，但没有任何东西！
任何人都可以告诉我这是什么问题吗？