我试图在android上直接使用wifi发送文件,但仅发送和接收文件名。
这是我的代码
发件人
Socket socket = new Socket();
int port = intent.getExtras().getInt(EXTRAS_GROUP_OWNER_PORT);
FileInputStream fis = null;
BufferedInputStream bis = null;
DataInputStream dis = null;
OutputStream os = null;
DataOutputStream dos = null;
try {
//socket.bind(null);
socket.connect((new InetSocketAddress("192.168.49.1", port)), SOCKET_TIMEOUT);
ContentResolver cr = context.getContentResolver();
Uri uri = null;
uri = uri.parse(FileUri);
File myFile = new File(uri.getPath());
byte[] mybytesarray = new byte[(int) myFile.length()];
fis = new FileInputStream(myFile);
bis = new BufferedInputStream(fis);
dis = new DataInputStream(bis);
dis.readFully(mybytesarray, 0, mybytesarray.length);
os = socket.getOutputStream();
dos = new DataOutputStream(os);
dos.writeUTF(myFile.getName()); //write fileName
dos.writeLong(mybytesarray.length); //write file length/size
int read;
while ((read = dis.read(mybytesarray)) > 0) {
dos.write(mybytesarray, 0, read);
}
} catch (IOException e) {
Log.e(WiFiDirectActivity.TAG, e.getMessage());
} finally {
if (socket != null) {
if (socket.isConnected()) {
try {
dos.close();
os.close();
dos.close();
socket.close();
Log.d(WiFiDirectActivity.TAG, "socket close");
} catch (IOException e) {
// Give up
e.printStackTrace();
}
接收者
int current = 0;
ServerSocket serverSocket = null;
InputStream in = null;
OutputStream output = null;
DataInputStream ClientData;
try{
serverSocket = new ServerSocket(8988);
Socket ClientSocket = null;
ClientSocket = serverSocket.accept();
in = ClientSocket.getInputStream();
ClientData = new DataInputStream(in);
String FileName = ClientData.readUTF();
output = new FileOutputStream(Environment.getExternalStorageDirectory()+"/" + FileName);
long size = ClientData.readLong();
byte[] buffer = new byte[8192];
int bytesRead;
while((bytesRead = ClientData.read(buffer)) > 0){
output.write(buffer, 0, bytesRead);
}
output.flush();
in.close();
output.close();
ClientSocket.close();
serverSocket.close();
return FileName;
} catch (IOException e) {
Log.e(WiFiDirectActivity.TAG, e.getMessage());
return null;
}
最佳答案
while ((read = dis.read(mybytearray)) > 0) {
dos.write(mybytearray, 0, mybytearray.length);
Log.d(WiFiDirectActivity.TAG, "sending");
dos.flush();
}
和
long size = ClientData.readLong();
byte[] buffer = new byte[1024];
while((size = ClientData.read(buffer)) > 0){
output.write(buffer, 0, bytesRead);
size = bytesRead;
}
您已经弄乱了这段代码,并且在链接的问题中使用了错误的答案:请参阅我的大量评论。它应该是:
while ((read = dis.read(mybytearray)) > 0) {
dos.write(mybytearray, 0, read);
Log.d(WiFiDirectActivity.TAG, "sending");
}
(切勿在循环内冲洗),以及
long size = ClientData.readLong();
byte[] buffer = new byte[8192]; // at least
int bytesRead;
while((bytesRead = ClientData.read(buffer)) > 0){
output.write(buffer, 0, bytesRead);
}
关于java - 如何通过Socket Java传输数据,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/30808260/