Develop Reference

Why can't i open pdf file from device storage?

I am saving a pdf file that im am receiving from server via method:
private boolean writeResponseBodyToDisk(ResponseBody body) {
try {
File futureStudioIconFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), "order.pdf");
InputStream inputStream = null;
OutputStream outputStream = null;
try {
byte[] fileReader = new byte[4096];
long fileSize = body.contentLength();
long fileSizeDownloaded = 0;
inputStream = body.byteStream();
outputStream = new FileOutputStream(futureStudioIconFile);
while (true) {
int read = inputStream.read(fileReader);
if (read == -1) {
break;
}
outputStream.write(fileReader, 0, read);
fileSizeDownloaded += read;
Log.d(TAG, "file download: " + fileSizeDownloaded + " of " + fileSize);
}
outputStream.flush();
return true;
} catch (IOException e) {
return false;
} finally {
if (inputStream != null) {
inputStream.close();
}
if (outputStream != null) {
outputStream.close();
}
}
} catch (IOException e) {
return false;
}
}
I did manage to save it on the device though as much as i understood i can't open it directly after the download because it's downloading from a item click in a adapter. Anyway, I made it so that after the download it changes the page to another activity where i should be able to open it, though it still fails. Code I am using in the activity:
String path = getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS) + "/order.pdf";
File file=new File(path);
if(file.canRead())
{
pdfView.fromFile(file).defaultPage(1).onLoad(new OnLoadCompleteListener() {
#Override
public void loadComplete(int nbPages) {
Toast.makeText(PdfActivity.this, String.valueOf(nbPages), Toast.LENGTH_LONG).show();
}
}).load();
}
Since the code should be correct, I tried a lot of variations of getting the path to the pdf, none seemed to work. Is the issue in the path or is it a whole other problem?
Edit: It can't read the file in if(file.canRead())

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

Download files from android application

I have a strange issue in downloading files in my android application all the files without space can be downloaded but when I have a space in my filename the file will not be downloaded for example:
Will not be download but this link:
http:..../DIV/Bon de Commande.pdf
will be downloaded:
http:..../DIV/POLITIQUE_QUALITE_V6.doc
This how I download file:
protected String downloadfile(String... sUrl) {
InputStream input = null;
OutputStream output = null;
HttpURLConnection connection = null;
try {
URL url = new URL(sUrl[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
// expect HTTP 200 OK, so we don't mistakenly save error report
// instead of the file
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
return "Server returned HTTP " + connection.getResponseCode()
+ " " + connection.getResponseMessage();
}
// this will be useful to display download percentage
// might be -1: server did not report the length
int fileLength = connection.getContentLength();
SharedPreferences myPreference= PreferenceManager.getDefaultSharedPreferences(getContext());
String path=Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/Document" ;
String Fichename=sUrl[0].replace(myPreference.getString("lientelecharge", ""), "");
String filePath=path+"/"+Fichename;
File file = new File(filePath);
if(file.exists()) {
}else{
// download the file
input = connection.getInputStream();
File folder = new File(path);
boolean success = true;
if (!folder.exists()) {
success = folder.mkdir();
}
output = new FileOutputStream(path+"/"+Fichename);
byte data[] = new byte[4096];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
total += count;
if (fileLength > 0) // only if total length is known
output.write(data, 0, count);
}
}
} catch (Exception e) {
return e.toString();
} finally {
try {
if (output != null)
output.close();
if (input != null)
input.close();
} catch (IOException ignored) {
}
if (connection != null)
connection.disconnect();
}
return null;
}
Any help would be appreciated

Petrus is right - you have to urlencode string like:
String addressToGo = URLEncoder.encode("www.123.com/55 U.doc", "utf-8");
More ways to encode the string can be found at (my favourite one is without extra libraries): URL encoding in Android

Download resume not working in setRequestProperty method

This is my doInBackground method:
#Override
protected String doInBackground(String... sUrl) {
InputStream input = null;
HttpURLConnection conection = null;
BufferedOutputStream bout = null;
FileOutputStream fos = null;
int downloaded = 0;
try {
URL url = new URL(sUrl[0]);
conection = (HttpURLConnection)url.openConnection();
int lenghtOfFile = conection.getContentLength();
if(STATUS) {
File file = new File(Environment.getExternalStorageDirectory().getPath() + "/myapp.apk");
if (file.exists()) {
downloaded = (int) file.length();
conection.setRequestProperty("Range", "bytes=" + (file.length()) + "-");
}
}
else {
conection.setRequestProperty("Range", "bytes=" + downloaded + "-");
}
conection.setDoInput(true);
conection.setDoOutput(true);
conection.connect();
input = new BufferedInputStream(url.openStream(), 8192);
fos=(downloaded==0)? new FileOutputStream(Environment.getExternalStorageDirectory().getPath() + "/myapp.apk"): new FileOutputStream(Environment.getExternalStorageDirectory().getPath() + "/myapp.apk",true);
bout = new BufferedOutputStream(fos, 1024);
byte data[] = new byte[1024];
long total = 0;
int count = 0;
while ((count = input.read(data, 0, 1024)) >= 0) {
if (isCancelled()) {
input.close();
return null;
}
bout.write(data, 0, count);
downloaded += count;
publishProgress((int)(downloaded * 100/ lenghtOfFile) );
total += count;
}
bout.flush();
input.close();
fos.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
} finally {
try {
if (output != null)
output.close();
if (input != null)
input.close();
if (fos != null)
fos.close();
if (bout != null)
bout.close();
} catch (IOException ignored) {
}
if (conection != null)
conection = null;
}
return null;
}
I start download task with this code (resume flag is false -> STATUS = FALSE):
dt = new DownloadTask(DownloadsActivity.this, false);
dt.execute("myurl.something.apk");
then when downloaded completely I launch apk file and all thing work correctly and apk installed correctly. But when pause my download with this code:
dt.cancel(true);
and then resume it with this code (resume flag is true-> STATUS = TRUE):
dt = new DownloadTask(DownloadsActivity.this, true);
dt.execute("myurl.something.apk");
This time apk size is equal to last downloaded before pause + apk total size, therefore my apk file is corrupted. Which means connection.setRequestProperty() not working for me. What is my code problem? Thanks in advance.

Download PDF file android

i have An Error while download PDF file From Server and save it on SD
i have permission To Access internet and external storage ..
It`s working fine on android 2.3.6
But on Tab 4.1.1 its create the file with 0 byte
URL url = new URL("https://docs.google.com/"+direct);
//create the new connection
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
//set up some things on the connection
urlConnection.setRequestMethod("GET");
urlConnection.setRequestProperty("Connection", "Keep-Alive");
urlConnection.setRequestProperty("Content-Type", "application/xml");
urlConnection.setDoOutput(true);
//and connect!
urlConnection.connect();
//set the path where we want to save the file
//in this case, going to save it on the root directory of the
//sd card.
File SDCardRoot = new File(Environment.getExternalStorageDirectory().getAbsoluteFile()+"/folder/");
//create a new file, specifying the path, and the filename
//which we want to save the file as.
File file = new File(SDCardRoot,book.getBook_name()+".pdf");
//this will be used to write the downloaded data into the file we created
FileOutputStream fileOutput = new FileOutputStream(file);
//this will be used in reading the data from the internet
InputStream inputStream = urlConnection.getInputStream();
//this is the total size of the file
totalSize = urlConnection.getContentLength();
//variable to store total downloaded bytes
//create a buffer...
byte[] buffer = new byte[1024];
int bufferLength = 0; //used to store a temporary size of the buffer
//now, read through the input buffer and write the contents to the file
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
//add the data in the buffer to the file in the file output stream (the file on the sd card
fileOutput.write(buffer, 0, bufferLength);
//add up the size so we know how much is downloaded
downloadedSize += bufferLength;
//this is where you would do something to report the prgress, like this maybe
publishProgress((downloadedSize*100)/totalSize);
}
//close the output stream when done
fileOutput.close();
//catch some possible errors...
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

Try this:
private String getExternalSDPath() {
File file = new File("/system/etc/vold.fstab");
FileReader fr = null;
BufferedReader br = null;
try {
fr = new FileReader(file);
} catch (FileNotFoundException e) {
// handle
}
String path = null;
try {
if (fr != null) {
br = new BufferedReader(fr);
String s = br.readLine();
while (s != null) {
if (s.startsWith("dev_mount")) {
String[] tokens = s.split("\\s");
path = tokens[2]; // mount_point
if (Environment.getExternalStorageDirectory()
.getAbsolutePath().equals(path)) {
break;
}
}
s = br.readLine();
}
}
} catch (IOException e) {
// handle
} finally {
try {
if (fr != null) {
fr.close();
}
if (br != null) {
br.close();
}
} catch (IOException e) {
// handle
}
}
return path;
}
The code is made specifically for Samsung Devices with both internal, an internal that acts as external, and SD.
I needed to access the SD and came up with the above code, so you can try it and possibly modify it to work on all devices.
Edit: My download AsyncTask
private class DownloadFile extends AsyncTask<Void, Void, String> {
#Override
protected String doInBackground(Void... params) {
String filename = "somefile.pdf";
HttpURLConnection c;
try {
URL url = new URL("http://someurl.com/" + filename);
c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
} catch (IOException e1) {
return e1.getMessage();
}
File myFilesDir = new File(Environment
.getExternalStorageDirectory().getAbsolutePath()
+ "/Download");
File file= new File(myFilesDir, filename);
if (file.exists()) {
file.delete();
}
if ((myFilesDir.mkdirs() || myFilesDir.isDirectory())) {
try {
InputStream is = c.getInputStream();
FileOutputStream fos = new FileOutputStream(myFilesDir
+ "/" + filename);
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.close();
is.close();
} catch (Exception e) {
return e.getMessage();
}
} else {
return "Unable to create folder";
}
}
#Override
protected void onPostExecute(String result) {
Toast.makeText(getApplicationContext(), result, Toast.LENGTH_LONG)
.show();
super.onPostExecute(result);
}
}