问题描述

用socket传输照片的问题

socket传图像 客户端接收到的图片长度为负数 大家帮忙看看 是为什么啊
这是发送端
public class SendPicture {

     public static final String END_SYMBOL = ""rn""; MyThread creatServer1 = new MyThread(); static File file = new File(getDir()1.png"");public static void sendpicture(){        Bitmap bitmap =null;        try{FileInputStream fileStream = new FileInputStream(file);      bitmap = BitmapFactory.decodeStream(fileStream);              Bitmap thumBitmap = ThumbnailUtils.extractThumbnail(bitmap 1024 1024);      //ImageUtil.saveJpeg(thumBitmap);      //发送给客户端  DataOutputStream dos = new DataOutputStream(MyThread.mSocketServer.getOutputStream());  ByteArrayOutputStream baos = new ByteArrayOutputStream();  thumBitmap.compress(Bitmap.CompressFormat.JPEG 85 baos);  //Log.i(tagbaos.size() "" + baos.size());  dos.writeInt(baos.size());  byte[] bytes = baos.toByteArray();  dos.write(bytes);  //dos.writeUTF(name);//写进去名字  dos.flush(); } catch (IOException e) {        e.printStackTrace();    }}  这是接收端

public static void receivemessage() {

                mThreadClient1=new Thread(new Runnable() {                                    @Override                                    public void run() {                                             try {                                              DataInputStream is = new DataInputStream(MyThread.mSocketClient.getInputStream());                                              int size = is.readInt(); //得到byte的长度                                             byte[] buffer = new byte[size];                                          int len = 0;                                          while(len < size){                                              len += is.read(buffer len size-len);                                          }                                          Bitmap bitmap = BitmapFactory.decodeByteArray(buffer 0 buffer.length);                                          if(bitmap == null){                                             // Log.i(tag服务器:bitmap为空"");                                          }                                         // String name = is.readUTF();                                         // ImageUtil.saveJpeg(bitmap name);                                          String fileName = System.currentTimeMillis() + "".jpg"";                                                    File pictureFile = new File(getDir()fileName);                                                FileOutputStream fos = new FileOutputStream(pictureFile);                                                bitmap.compress(Bitmap.CompressFormat.PNG1 fos);                                                fos.close();                                    } catch (IOException e) {                                          // TODO Auto-generated catch block                                          e.printStackTrace();                                      }                                    }                            });           mThreadClient1.start();

}

这是logcat

解决方案

看下对方计算机是不是大端序的，将整数颠倒了，或者你整个解析的不是表示长度的数据