【发布时间】：2014-08-16 14:32:33
【问题描述】：
您好，问题是：服务器正确地将图像发送到客户端（我认为）。从客户端收到的文件与服务器电话上存在的文件大小相同，所以我猜每个字节都被传输了，但图像仍然不可见。服务器和客户端都是安卓手机。在此先感谢您，希望您能帮助我。
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();
}
}
}
客户端代码：
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();
}
}
}
}
【问题讨论】：
-
在服务器端的 sendListener 中 - 您从 bufferedInputStream 读取前 1024 个字节 - 从不将它们存储在任何地方 - 在开始实际的读/写循环之前。
-
你说得对，我没注意到！谢谢！现在服务器发送所有字节！可悲的是，在客户端，图像已损坏，根本不可见。您能进一步帮助我吗？提前非常感谢您
标签： android sockets file-transfer