Could you point me out to a code or url where I can find some examples how to use dropbox java api and upload binary files like, .doc files jpg and video files.
Current examples in the web only point to uploading a text file. But when I try to read files using java InputStream and convert them to byte array and pass into dropbox file upload functions files get corrupted. Same issue with downloading files as well. Thanks in Advance.
Regards,
Waruna.
EDIT--
Code Sample
FileInputStream fis = new FileInputStream(file);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte [] buf = new byte[1024];
for(int readNum; (readNum = fis.read(buf)) != -1;) {
bos.write(buf, 0, readNum);
System.out.println("read "+ readNum + "bytes,");
}
ByteArrayInputStream inputStream2 = new ByteArrayInputStream(bos.toByteArray());
Entry newEntry = mDBApi.putFile("/uploads/"+file.getName(), inputStream2, file.toString().length(), null, null);
System.out.println("Done. \nRevision of file: " + newEntry.rev + " " + newEntry.mimeType);
return newEntry.rev;
The 3rd argument of DropboxAPI.putFile() should be the number of bytes to read from the input stream - You are passing the length of the filename.
Instead of
Entry newEntry = mDBApi.putFile("/uploads/"+file.getName(), inputStream2,
file.toString().length(), null, null);
Use
Entry newEntry = mDBApi.putFile("/uploads/"+file.getName(), inputStream2,
bos.size(), null, null);
I don't think you need to convert to byte array, simply use FileInputStream is enough for a file, txt as well as binary. The following code works, I just tested with JPG.
DropboxAPI<?> client = new DropboxAPI<WebAuthSession>(session);
FileInputStream inputStream = null;
try {
File file = new File("some_pic.jpg");
inputStream = new FileInputStream(file);
DropboxAPI.Entry newEntry = client.putFile("/testing.jpg", inputStream,
file.length(), null, null);
System.out.println("The uploaded file's rev is: " + newEntry.rev);
} catch (DropboxUnlinkedException e) {
// User has unlinked, ask them to link again here.
System.out.println("User has unlinked.");
} catch (DropboxException e) {
System.out.println("Something went wrong while uploading.");
} catch (FileNotFoundException e) {
System.out.println("File not found.");
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {}
}
}
Related
I am trying to transfer a .mp4 file using WebRTC and it's DataChannel. In order to do that I am breaking the file into chunks like below:
FileInputStream is = new FileInputStream(file);
byte[] chunk = new byte[260000];
int chunkLen = 0;
sentFileByte = new ArrayList<>();
while ((chunkLen = is.read(chunk)) != -1) {
sentFileByte.add(chunk);
}
After that, sending the chunks by index like:
byte[] b = sentFileByte.get(index);
ByteBuffer bb = ByteBuffer.wrap(b);
bb.put(b);
bb.flip();
dataChannel.send(new DataChannel.Buffer(bb, true));
On the receiver end I am receiving the chunks and adding it to an Arraylist
receivedFileByteArr.add(chunkByteArr);
After receiving all the chunks successfully I am trying to convert these in to a file like below:
String path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath() + "/" + fileName;
File file = new File(path);
try {
FileOutputStream fileOutputStream = new FileOutputStream(file);
for (int i = 0; i < receivedFileByteArr.size(); i++) {
fileOutputStream.write(receivedFileByteArr.get(i));
}
fileOutputStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
After completing all these steps, file is created successfully. File size is also same. But problem is the file is not playable in any video player. I guess I am making some mistake on FileInputStream and FileOutputStream. I need help to fix this error.
i want convert PDF file to byte array in (onActivityResult)
I tried several different ways but it didn't work
Please answer if anyone knows.
Update :
case 1212 :
if (resultCode == RESULT_OK){
Uri uri = data.getData();
File file = new File(uri.getPath());
int size = (int) file.length();
byte[] bytes = new byte[size];
try {
BufferedInputStream buf = new BufferedInputStream(new FileInputStream(file));
buf.read(bytes, 0, bytes.length);
buf.close();
} catch (FileNotFoundException e) {
Toast.makeText(getApplicationContext(),"FileNotFound",Toast.LENGTH_LONG).show();
e.printStackTrace();
} catch (IOException e) {
Toast.makeText(getApplicationContext(),"IOException",Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}else Toast.makeText(getApplicationContext(),"خطا!",Toast.LENGTH_LONG).show();
this code show FileNotFound Toast
Use Package java.nio.file from java 7
Path pdfFilePath = Paths.get("/file/path/your_file.pdf"); //File path
byte[] pdfByteArray = Files.readAllBytes(pdfFilePath );
I have android app that downloads compressed files and then decompress it ..
it works fine with English name files..
but if the file with Arabic name it make error malformated
E/UncaughtException: java.lang.IllegalArgumentException: MALFORMED[1]
this is my code..
appreciate your help
Thanks
private boolean unpackZip(String path, String zipname)
{
InputStream is;
ZipInputStream zis;
try
{
String filename;
is = new FileInputStream(path + zipname);
zis = new ZipInputStream(new BufferedInputStream(is));
ZipEntry ze;
byte[] buffer = new byte[1024];
int count;
while ((ze = zis.getNextEntry()) != null)
{
filename = ze.getName();
// Need to create directories if not exists, or
// it will generate an Exception...
if (ze.isDirectory()) {
File fmd = new File(path + filename);
fmd.mkdirs();
continue;
}
FileOutputStream fout = new FileOutputStream(path + filename);
while ((count = zis.read(buffer)) != -1)
{
fout.write(buffer, 0, count);
}
fout.close();
zis.closeEntry();
}
zis.close();
}
catch(IOException e)
{
e.printStackTrace();
return false;
}
return true;
}
Try
new ZipInputStream(new BufferedInputStream(is), Charset.forName("Windows-1256"));
as default is UTF-8 and that evidently did not work.
After feedback: evidently there is some Android API version problem.
You could inspect:
filename = ze.getName();
Sometimes one can "patch" the encoding. Very error prone, or even not feasible.
filename = new String(filename.getBytes("..."), "...");
where one might try different encodings:
Windows-1256
UTF-8
(Especially converting to UTF-8 might raise conversion errors, as UTF-8 requires the bytes to have a specific bit pattern for multibyte sequences.)
In an Android project I am reading an audio file into an InputStream and consequently write it to another location on the device. When reading, in.read(buffer) as shown in the snippet returns -1. After running the app, I locate the file using the phone's file manager app to play. But it doesn't play because the file is empty, i.e. size is 0 bytes. What is the right way to read and write audio files in using InputStreams and OutputStreams?
try {
DocumentFile newFile = pickedDir.createFile("audio/mp3", "New File");
OutputStream out = getContentResolver().openOutputStream(newFile.getUri());
InputStream in = new FileInputStream("/storage/emulated/0/beat.mp3");
// To check whether the source file exists
File testFile = File("/storage/emulated/0/beat.mp3");
Log.d("App", "exists: " + testFile.exists() + " len: " + testFile.length());//exists: true len: 0
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
in.close();
out.flush();
out.close();
} catch (Exception e) {
Log.d("Exception ", e.getMessage());
}
to be pedantic, use:
FileInputStream in = new FileInputStream("/storage/emulated/0/beat.mp3");
And just make sure the path is correct and the file exists. Other than that, from the info you gave, I cannot think of anything else
OutputStream out = getContentResolver().openOutputStream(newFile.getUri());
InputStream in = new FileInputStream("/storage/emulated/0/beat.mp3");
File newFile = File("/storage/emulated/0/beat.mp3");
Seem your code have problem here, newFile.getUri() is called before it init?
I have a 7zip archive which contains some hundred files separated into different directories. The target is to download it from a FTP server and then extract it on the phone.
My problem is that the 7zip SDK doesn't contain a lot. I am looking for examples, tutorials and snippets regarding the decompression of 7z files.
(Decompression via Intent is only a secondary option)
Go here:
LZMA SDK just provides the encoder and decoder for encoding/decoding the raw data, but 7z archive is a complex format for storing multiple files.
i found this page that provides an alternative that works like a charm. You only have to add compile 'org.apache.commons:commons-compress:1.8'
to your build gradle script and use the feature you desire. For this issue i did the following :
AssetManager am = getAssets();
InputStream inputStream = null;
try {
inputStream = am.open("a7ZipedFile.7z");
File file1 = createFileFromInputStream(inputStream);
} catch (IOException e) {
e.printStackTrace();
}
SevenZFile sevenZFile = null;
try{
File f = new File(this.getFilesDir(), "a7ZipedFile.7z");
OutputStream outputStream = new FileOutputStream(f);
byte buffer[] = new byte[1024];
int length = 0;
while((length=inputStream.read(buffer)) > 0) {
outputStream.write(buffer,0,length);
}
try {
sevenZFile = new SevenZFile(f);
SevenZArchiveEntry entry = sevenZFile.getNextEntry();
while (entry != null) {
System.out.println(entry.getName());
FileOutputStream out = openFileOutput(entry.getName(), Context.MODE_PRIVATE);
byte[] content = new byte[(int) entry.getSize()];
sevenZFile.read(content, 0, content.length);
out.write(content);
out.close();
entry = sevenZFile.getNextEntry();
}
sevenZFile.close();
outputStream.close();
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}catch (IOException e) {
//Logging exception
e.printStackTrace();
}
The only draw back is approximately 200k for the imported library. Other than that it is really easy to use.