嗨，这就是问题：服务器正确地将图像发送到客户端（我认为）。从客户端接收的文件与服务器电话上存在的文件大小相同，因此我猜测每个字节都已传输，但图像仍然不可见。服务器和客户端都是Android手机。在此先感谢，我希望你能帮助我。
服务器代码：
public class FileActivity extends Activity {
private FileInputStream fileInputStream;
private BufferedInputStream bufferedInputStream;
private OutputStream outputStream;
private byte [] mybytearray;
private String tmp = null;
private TextView tv;
private File myFile;
private int l;
private String path;
private EditText editText;
private ServerSocket serverSocket;
private Socket client;
public static String SERVERIP = "10.0.2.15";
private final int SERVERPORT = 8080;
private byte [] imgbyte;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_file);
tv = (TextView) findViewById(R.id.textView1);
editText = (EditText) findViewById(R.id.editText1);
SERVERIP = getLocalIpAddress();
Thread sThread = new Thread(new ServerThread());
sThread.start();
}
public void sendListener(View v) {
tmp = editText.getText().toString();
path = "/sdcard/" + tmp;
myFile = new File(path);Log.d("SERVER", "WORKS");
l = (int) myFile.length();Log.d("SERVER", "WORKS");
tv.setText(path + " " + Integer.toString(l));
tmp = Integer.toString(l); Log.d("SERVER", "WORKS");
String test = tmp;
//out.println(tmp);
Log.d("SERVER", "WORKS");
try {
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(client.getOutputStream())), true);
out.println(test);
//out.close();
Log.d("SERVER", "WORKS");
byte[] mybytearray = new byte[1024]; //create a byte array to file
Log.d("SERVER", "WORKS");
fileInputStream = new FileInputStream(myFile);
bufferedInputStream = new BufferedInputStream(fileInputStream);
Log.d("SERVER", "WORKS");
Log.d("SERVER", "WORKS");
try{
outputStream = client.getOutputStream();
} catch(Exception e)
{
Log.d("OUTPUT", "UFFFF");
e.printStackTrace();
}
/* Log.d("SERVER", "ALMOST");
outputStream.write(mybytearray, 0, mybytearray.length); Log.d("SERVER", "DONE");//write file to the output stream byte by byte*/
// outputStream.flush();
// outputStream.close();
Log.d("SERVER", "WORKS");
int count = 0;
int size = 0;
while((count = bufferedInputStream.read(mybytearray, 0 , mybytearray.length)) != -1)
{
// count = bufferedInputStream.read(mybytearray, 0 , mybytearray.length);
size += count;
Log.d("SERVER", "SEND");
try{
outputStream.write(mybytearray, 0, count);
} catch(Exception e) {
e.printStackTrace();
}
Log.d("TEST", Integer.toString(count));
}
Log.d("SERVER", "DONE");
bufferedInputStream.close();
outputStream.close();
client.close();
} catch (Exception e) {
}
}
public class ServerThread implements Runnable {
@Override
public void run() {
// TODO Auto-generated method stub
try {
serverSocket = new ServerSocket(SERVERPORT);
client = serverSocket.accept();
//outputStream = client.getOutputStream();
Log.d("SERVER", "Connesso");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.d("TEST", "UFFFAAA");
}
}
}
private String getLocalIpAddress() {
String tmp = "";
int i = 0;
try {
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
InetAddress inetAddress = enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress())
{
tmp += "IP: " + inetAddress.getHostAddress() + "\n";
}
}
}
} catch (SocketException ex) {
Log.e("ServerActivity", ex.toString());
}
return tmp;
}
@Override
protected void onStop() {
super.onStop();
try {
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
客户代码：
public class FileActivity extends Activity {
private EditText serverIp, getPort;
private Button connectPhones;
private TextView tv, tvIP;
private Boolean connected = false;
private String serverIpAddress, portStr;
private Socket socket;
private int port, len;
private String filepath;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_file);
tvIP = (TextView) findViewById(R.id.IPtv);
tv = (TextView) findViewById(R.id.Portatv);
serverIp = (EditText) findViewById(R.id.server_ip);
connectPhones = (Button) findViewById(R.id.connect_phones);
getPort = (EditText) findViewById(R.id.server_port);
}
public void connectListener(View v)
{
if (!connected) {
serverIpAddress = serverIp.getText().toString();
portStr = getPort.getText().toString();
if (!serverIpAddress.equals("")) {
Thread cThread = new Thread(new ClientThread());
cThread.start();
}
}
}
public class ClientThread implements Runnable
{
@Override
public void run() {
// TODO Auto-generated method stub
port = Integer.parseInt(portStr);
socket = new Socket();
try {
InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
Log.d("ClientActivity", "C: Connessione in corso...");
socket = new Socket(serverAddr, port);
Log.d("ClientActivity", "C: Connesso!");
connected = true;
DataInputStream dis;
try {
dis = new DataInputStream(socket.getInputStream());
int bytes;
byte[] b = new byte[32];
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String l = in.readLine();
//String line = Integer.toString(l);
Log.d("PROVA", l);
try
{
len = Integer.parseInt(l); Log.d("CLIENT", Integer.toString(len));
}
catch (NumberFormatException e)
{
e.printStackTrace();
}
byte[] img = new byte[1082922]; //1082922
FileOutputStream fos = new FileOutputStream("/sdcard/img.jpg");
BufferedOutputStream bos = new BufferedOutputStream(fos);
/*bytes = dis.read(img, 0, img.length);
bos.write(img, 0, img.length);*/
int count = 0;
while ((bytes = dis.read(img)) != -1) {
count += bytes;
Log.d("CLIENT", Integer.toString(count));
Log.d("TEST", Integer.toString(bytes));
//Write to file
bos.write(img, 0, bytes);
}
bos.flush();
bos.close();
Log.d("TCP", "Save to file");
} catch(IOException e){
e.printStackTrace();
}
} catch (Exception e) {
Log.e("ClientActivity", "C: Errore", e);
connected = false;
}
}
}
@Override
protected void onStop() {
super.onStop();
if(connected == true)
{
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
答案 0 :(得分：0)
您将缓冲和非缓冲I / O组合在相同的基础流上。缓冲的阅读器将通过用可用的任何内容填充缓冲区来窃取其他流中的数据。您有数据输入和输出流：将它们用于所有内容。您可以通过writeInt（）/ readInt（）发送文件大小。
答案 1 :(得分：-1)
在.read()循环之前，您已经有一个while。那些字节你没有write()所以客户端没有收到文件的第一个字节。我现在看到你写的但不计算它们的大小。无论如何：糟糕的建设。对于第一次阅读，您也应该使用计数变量。并且只写入计数字节。最好完全删除第一次阅读。