Develop Reference

Send list of files using socket wifip2p

I'm trying to send multiple files from client to server using socket but when I click upload button it adds only one file second

Your copyFile() is not suitable for network transmissions.
You need to get rid of the two close() calls inside of copyFile(). On the client side, out.close() is closing the socket after the 1st file has been sent. On the server side, InputStream.close() is closing the socket after the 1st file has been received. It is the caller's responsibility to close the streams it passes to copyFile(), it is not copyFile()'s responsibility.
More importantly, for each file the client wants to send, copyFile() is not sending the file's byte count before sending the file's actual bytes, to indicate where each file ends and the next begins. So, on the server side, copyFile() does not know when to stop reading from the inputStream and will just keep reading endlessly until the connection is closed/broken.
As-is, copyFile() may work for copying files from one folder to another on the local system, but it is not suitable for copying files over a TCP network.
Try this instead:
Client side:
try {
socket.bind(null);
socket.connect((new InetSocketAddress(host, port)), SOCKET_TIMEOUT);
Log.d(TAG, "Client socket - " + socket.isConnected());
BufferedOutputStream bos = new BufferedOutputStream(socket.getOutputStream());
DataOutputStream dos = new DataOutputStream(bos);
dos.writeInt(fileUri.size());
for(String file : fileUri)
{
//long length = file.length();
//dos.writeLong(length);
String name = file;
dos.writeUTF(name);
File f = new File(file);
sendFile(f, dos);
}
dos.close();
Log.d(TAG, "Client: Data written");
}
catch (IOException e) {
Log.e(TAG, e.getMessage());
}
finally {
if (socket != null) {
if (socket.isConnected()) {
try {
socket.close();
}
catch (IOException e) {
// Give up
e.printStackTrace();
}
}
}
}
void sendFile(File in, DataOutputStream out) throws IOException {
long fileLength = in.length();
out.writeLong(fileLength);
FileInputStream fis = new FileInputStream(in);
BufferedInputStream bis = new BufferedInputStream(fis);
byte buf[] = new byte[1024];
int len;
while (fileLength > 0) {
len = bis.read(buf);
if (len == -1) throw new IOException();
out.write(buf, 0, len);
fileLength -= len;
}
}
Server side:
try {
ServerSocket serverSocket = new ServerSocket(8988);
Socket client = serverSocket.accept();
BufferedInputStream bis = new BufferedInputStream(client.getInputStream());
DataInputStream dis = new DataInputStream(bis);
int filesCount = dis.readInt();
File[] files = new File[filesCount];
for(int i = 0; i < filesCount; i++)
{
Log.d(TAG, "doInBackground: " + filesCount);
//long fileLength = dis.readLong();
String fileName = dis.readUTF();
files[i] = new File(context.getExternalFilesDir("received"), Long.toString(System.currentTimeMillis()) + ".mp4" );
Log.d(TAG, "doInBackground: 1" );
File dirs = new File(context.getPackageName() + files[i].getParent());
Log.d(TAG, "doInBackground: 2" );
if (!dirs.exists()) dirs.mkdirs();
files[i].createNewFile();
Log.d(TAG, "server: copying files " + files[i].toString());
receiveFile(dis, files[i]);
}
serverSocket.close();
return "done";
}
catch (IOException e) {
Log.e(TAG, e.getMessage());
return null;
}
void receiveFile(DataInputStream in, File out) throws IOException {
long fileLength = in.readLong();
FileOutputStream fos = new FileOutputStream(out);
BufferedOutputStream bos = new BufferedOutputStream(fos);
byte buf[] = new byte[1024];
int len;
while (fileLength > 0) {
len = (fileLength >= 1024) ? 1024 : (int) fileLength;
len = in.read(buf, 0, len);
if (len == -1) throw new IOException();
bos.write(buf, 0, len);
fileLength -= len;
}
}

How to programatically download files with increased speed in android

Hi have implemented programatically downloading of file using inputstream and cipheroutputstream(for encryption). The download is happening very slow. Whereas if i try to download via download manager, it is very fast. What can i do to improve my code and increase the download speed of the file. Below is my code.
private void saveFileUsingEncryption(String aMineType, long length) throws Exception {
int bufferSize = 1024*4;
//byte[] buffer = new byte[1024];
byte[] buffer = new byte[bufferSize];
int bytesRead = 0;
long totalRead = 0;
FileOutputStream outStream = null;
File f = new File(Constants.DWLPATH);
if (!f.exists()) {
f.mkdirs();
}
try {
Cipher aes = Cipher.getInstance("ARC4");
aes.init(Cipher.ENCRYPT_MODE, new SecretKeySpec("mykey".getBytes(), "ARC4"));
if(contDisp==null || contDisp.length()==0) {
// downloadFileName = downloadFileName.replaceAll("[^a-zA-Z0-9_]+", "");
downloadFileName = downloadFileName + "." + getFileExtension(aMineType);
}
outStream = new FileOutputStream(Constants.DWLPATH + downloadFileName,true);
CipherOutputStream out = new CipherOutputStream(outStream, aes);
while ((bytesRead = inputStream.read(buffer, 0, bufferSize)) >= 0) {
out.write(buffer, 0, bytesRead);
try{
// Adjust this value. It shouldn't be too small.
Thread.sleep(50);
}catch (InterruptedException e){
TraceUtils.logException(e);
}
totalRead += bytesRead;
sb=sb.append("\n Total bytes Read:"+totalRead);
Log.e("--",sb.toString());
/* if (this.length > 0) {
Long[] progress = new Long[5];
progress[0] = (long) ((double) totalRead / (double) this.length * 100.0);
publishProgress(progress);
}*/
if (this.isCancelled()) {
if (conn != null)
conn.disconnect();
conn = null;
break;
}
}
Log.e("Download completed","success");
out.flush();
//Utils.putDownloadLogs(requestUrl,mimeType,length, downloadFileName,"Download is Successful",sb.toString(), context);
outStream.close();
buffer = null;
} catch (Exception e) {
TraceUtils.logException( e);
file_newsize = storedFileSizeInDB + totalRead;
if (totalFileSize == 0)
totalFileSize = length;
callback.onRequestInterrupted(file_newsize,totalFileSize);
StringWriter errors = new StringWriter();
e.printStackTrace(new PrintWriter(errors));
// Utils.putDownloadLogs(requestUrl,mimeType,length,downloadFileName,"failure---" + errors.toString(),sb.toString(), context);
throw e;
} finally {
if (outStream != null)
outStream.close();
outStream = null;
}
}

You can use default download manager to download the file because its very easy to implement and provide better features like respond to the internet connection , provide accessibility to add notification in status bar , by running the query on download manager object you can find the total bytes and remaining bytes so you can calculate the progress and after completion of download by tapping the notification one can perform the desired operation.
And also there are many libraries are available for to achieve this like
PRDOWNLOADER
FetchDownloader
This libraires provide you the feature of pause,download, resume download , tracking the progress and cancel download
Also you can customize it as per your need.

Here is the DownloadAndEncryptFileTask.class to download with encryption
public class DownloadAndEncryptFileTask extends AsyncTask<Void, Void, Void> {
private String mUrl;
private File mFile;
private Cipher mCipher;
InputStream inputStream;
FileOutputStream fileOutputStream;
CipherOutputStream cipherOutputStream;
public DownloadAndEncryptFileTask(String url, File file, Cipher cipher) {
if (url == null || url.isEmpty()) {
throw new IllegalArgumentException("You need to supply a url to a clear MP4 file to download and encrypt, or modify the code to use a local encrypted mp4");
}
mUrl = url;
mFile = file;
mCipher = cipher;
}
private void downloadAndEncrypt() throws Exception {
URL url = new URL(mUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
if (mFile.length() > 0) {
connection.setRequestProperty("Range", "bytes=" + mFile.length() + "-");
}
connection.connect();
Log.e("length", mFile.length() + "");
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
throw new IOException("server error: " + connection.getResponseCode() + ", " + connection.getResponseMessage());
}
inputStream = connection.getInputStream();
if (mFile.length() > 0) {
//connection.connect();
fileOutputStream = new FileOutputStream(mFile, true);
} else {
fileOutputStream = new FileOutputStream(mFile);
}
CipherOutputStream cipherOutputStream = new CipherOutputStream(fileOutputStream, mCipher);
byte buffer[] = new byte[1024 * 1024];
int bytesRead;
while ((bytesRead = inputStream.read(buffer)) != -1) {
Log.d(getClass().getCanonicalName(), "reading from http...");
cipherOutputStream.write(buffer, 0, bytesRead);
}
inputStream.close();
cipherOutputStream.close();
connection.disconnect();
}
#Override
protected Void doInBackground(Void... params) {
try {
downloadAndEncrypt();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
Log.d(getClass().getCanonicalName(), "done");
}
}
Call this class
new DownloadAndEncryptFileTask(
myFeedsModel.getVideo().getVideo360(),
new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), myFeedsModel.getFile_name()),
OBJECT OF YOUR CIPHER

Bluetooth file transfer hangs when I send large files

I've implemented bluetouth file transfer according to the example: http://developer.android.com/guide/topics/connectivity/bluetooth.html
I've faced with an issue: when I do transfer of a large (50-100Mb) file in the most cases the
transfer process is stuck at any point of the transfer process. Log info says that process stops at the point of write(sender) and read(receiver).When stuck - the total bytes number recorded by sender to a stream is always exceeds the amount of bytes have been read by receiver.The subtraction: received - sent data is equal to 4-7 Kb.
It seems that in certain moment the read method can't do actual READ.
Sometimes 100Mb trasfer passes successfully.
Could you please help me with that?
Thanks in advance
Receiver :
try {
BufferedInputStream bis = new BufferedInputStream(mSocket.getInputStream());
File file = new File(root, progressData.file.getFileName());
FileOutputStream fileStream = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(fileStream);
DialogsCaller dialog = DialogsCaller.getInstance();
long bytesRead = 0;
int len = 0;
long size = progressData.file.getFileSize();
int bufSize = Constants.BUFFER_SIZE * 8;
byte[] buffer = new byte[bufSize];
int timeOut = 0;
int maxTimeOut = 16;
while (bytesRead < size) {
Log.w(TAG, "BEFORE AVAILABLE " + bytesRead);
while (bis.available() == 0 && timeOut < maxTimeOut) {
timeOut++;
Thread.sleep(250);
}
long remainingSize = size - bytesRead;
int byteCount = (int) Math.min(remainingSize, bufSize);
Log.w(TAG, "BEFORE READ " + "currentSize : "
+ bytesRead + " byteCount " + byteCount);
len = bis.read(buffer, 0, byteCount);
Log.w(TAG, "AFTER READ " + "Len " + len);
if (len > 0) {
timeOut = 0;
Log.w(TAG, "BEFORE WRITE " + bytesRead);
bos.write(buffer, 0, len);
bytesRead += len;
Log.w(TAG, "AFTER WRITE " + bytesRead);
dialog.setProgress(
progressData, (int) bytesRead);
}
}
bos.flush();
} catch (Exception e) {
Callback.post(e);
Log.e(TAG, "Receiving problem");
mHandler.obtainMessage(MessageType.CANNOT_RECEIVE_DATA)
.sendToTarget();
throw e;
} finally {
if (bos != null) {
try {
Log.i(TAG, "FILE CLOSE");
bos.close();
} catch (IOException e) {
Callback.post(e);
}
}
}
Sender :
try {
File file = new File(progressData.file.getFilePath());
FileInputStream fileStream = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(fileStream);
BufferedOutputStream bos = new BufferedOutputStream(
mCurrentSocket.getOutputStream());
long sentBytes = 0;
int len = 0;
byte[] buffer = new byte[Constants.BUFFER_SIZE];
DialogsCaller dialog = DialogsCaller.getInstance();
while ((len = bis.read(buffer)) > -1) {
if (len > 0) {
Log.w("F_" + TAG, "BEFORE " + "currentSize : " + sentBytes
+ "Len " + len);
bos.write(buffer, 0, len);
bos.flush();
sentBytes += len;
Log.w("F_" + TAG, "AFTER " + "currentSize : " + sentBytes);
dialog.setProgress(progressData, (int) sentBytes);
// SystemClock.sleep(120);
}
}
} catch (Exception e2) {
Callback.post(e2);
Log.e(TAG, "Sending problem");
mHandler.obtainMessage(MessageType.CANNOT_SEND_DATA).sendToTarget();
throw e2;
} finally {
try {
if (bis != null) {
bis.close();
}
} catch (IOException e) {
Callback.post(e);
Log.e(TAG, "Stream not closed");
}
}

You can throttle while you are sending data...few milliseconds delay before you send the next chunk of data..Also reduce the buffer size based on the target device..I had faced similar issue.After tuning the buffer size based on target device it works..You will have to implement some logic to get the target device.
The blutooth communication in android is flaky(because of different radios and implementation) you will have to try different things before it starts working properly on all the devices.

android app connecting to google drive and downloading a file to sd card

My android app connects to google drive and checks for a file on the drive, if the file isn't present then it downloads it to sdcard. the following code does the downloading .
the problem that occurs is that the file which gets downloaded is showing 0 bytes after downloading. please help me locate the error in the code. thanks for helping out .
private void savefile(String filename, InputStream in , Boolean replace ) {
try {
java.io.File f = new java.io.File(filename);
logonscreen("trying to savefile :"+filename);
if(replace) {
showToast("replace:"+replace.toString());
OutputStream stream = new BufferedOutputStream(new FileOutputStream(filename));
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int len = 0;
while ((len = in.read(buffer)) != -1) {
stream.write(buffer, 0, len);
}
if(stream!=null) {
stream.close();
}
} else {
showToast("replace: "+replace.toString()+" , file exists " + f.exists());
if(f.exists()== false) {
OutputStream stream = new BufferedOutputStream(new FileOutputStream(filename));
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int len = 0;
while ((len = in.read(buffer)) != -1) {
stream.write(buffer, 0, len);
}
if(stream!=null) {
stream.close();
}
}
}
//Do something
} catch (IOException e) {
// TODO: handle exception
logonscreen("exception at Save File:" +filename + "exception" + e.getMessage());
// showToast("exception:" + e.getMessage());
} catch (Exception e) {
logonscreen("exception at Save File:" + e.getMessage());
// showToast("exception:" + e.getMessage());
e.printStackTrace();
}
}

android progressbar

hi could some one show me how to add a progress bar to this method :
public boolean sendFile(String path,String ip, int port) {
// TODO Auto-generated method stub
try {
String[] str = ip.split("\\.");
byte[] IP = new byte[str.length];
for (int i = 0; i < str.length; i++) {
IP[i] = (byte) Integer.parseInt(str[i]);
}
Socket socket = getSocket(InetAddress.getByAddress(IP), port);
if (socket == null) {
Log.i("SO sendFILE","");
return false;
}
Log.i("SocketOP", "sendFILE-1");
File f = new File(path);
String filename=path.substring(path.lastIndexOf("/")+1);
System.out.println("filename:"+filename);
fin.filename = "~"+filename;
BufferedOutputStream out = new BufferedOutputStream( socket.getOutputStream() );
FileInputStream fileIn = new FileInputStream(f);
Log.i("SocketOP", "sendFILE-2");
byte [] buffer = new byte [(int)f.length()];
System.out.println("SO sendFile f.length();" + f.length());
int bytesRead =0;
while ((bytesRead = fileIn.read(buffer)) > 0) {
out.write(buffer, 0, buffer.length);
System.out.println("SO sendFile" + bytesRead +filename);
}
out.flush();
out.close();
fileIn.close();
Log.i("SocketOP", "sendFILE-3");
} catch (IOException e) {
return false;
//e.printStackTrace();
}
// Toast.makeText(this, "Lvbvhhging...", Toast.LENGTH_SHORT).show();
return true;
}
thanks in advance.

ProgressDialog pbarDialog = new ProgressDialog( mContext );
pbarDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pbarDialog.setMessage("Loading...");
pbarDialog.setCancelable(false);
pbarDialog.setMax(100);
pbarDialog .setProgress(0);
pbarDialog.show();
while ((bytesRead = fileIn.read(buffer)) > 0) {
out.write(buffer, 0, buffer.length);
//get the previous value of progress bar
int old_value = pbarDialog .getProgress();
//calculate how much did you read from the file
int new_read =(int)( ((float) bytesRead/f.length()) )*100 ) ;
//add the new read to the old_value
int value = new_read+old_value;
pbarDialog.setProgress(value);
System.out.println("SO sendFile" + bytesRead +filename);
}
pbarDialog.dismiss();

You would need to run that function from the UI thread in order to show a progress bar, but then you wouldn't get to see any progress until the function finished. The right approach for what you are trying to do is an AsyncTask, check
http://developer.android.com/reference/android/os/AsyncTask.html