Here's the code to download a 3pg video file. Maybe one can give me an idea about what's wrong with it. I really need help. Can't get it to download the file:
Blockquote
protected String doInBackground(String... sUrl) {
byte[] data = new byte[1024];
int count = 0;
FileOutputStream fos = null;
BufferedOutputStream output = null;
try {
URL url= new URL(sUrl[0]);
URLConnection connection = url.openConnection();
connection.connect();
Log.v("URL"," " + connection.getURL());
Log.v("File ", "length = " + connection.getContentLength());
// download the file
BufferedInputStream input = new BufferedInputStream(connection.getInputStream());
File f = new File(Environment.getExternalStorageDirectory().getPath() + "/twokids.3gp");
f.setWritable(true,true);
try {
fos = new FileOutputStream(f);
} catch (FileNotFoundException fnfe) {
fnfe.getStackTrace();
} catch (SecurityException se) {
se.getStackTrace();
}
output = new BufferedOutputStream(fos);
while ((count = input.read(data)) != -1) {
Log.v("Count="," " + count);
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
Log.v("Download","Finished");
} catch (IndexOutOfBoundsException iobe) {
iobe.getStackTrace();
} catch (IOException ioe) {
ioe.getStackTrace();
} catch (NullPointerException npe) {
npe.getStackTrace();
}
catch (Exception e) {
e.getStackTrace();
}
return null;
}
And strangely enough, sometimes the method connection.getContentLength() returns -1 instead of the file length.
Related
I am creating a custom print service in Android. When PDF is share to print service, it prints correctly but when image is shared it does not print as expected since it is corrupted. Below is method in my custom printservice. It saves PDF and image file. PDF file is fine and readable but image is corrupted after saved
private void handleHandleQueuedPrintJob(final PrintJob printJob) {
if (printJob.isQueued()) {
printJob.start();
}
int printType = printJob.getDocument().getInfo().getContentType();
if (printType == CONTENT_TYPE_DOCUMENT) {
String fName = MyHelper.getRandomString(8) + ".pdf";
File destFile = new File(getExternalFilesDir(MyConstants.FolderTemp), fName);
try {
InputStream in = new FileInputStream(printJob.getDocument().getData().getFileDescriptor());
FileOutputStream out = new FileOutputStream(destFile);
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 (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
} else if (printType == CONTENT_TYPE_PHOTO) {
String fName = MyHelper.getRandomString(8) + ".jpg";
File destFile = new File(getExternalFilesDir(MyConstants.FolderTemp), fName);
InputStream in = new FileInputStream(printJob.getDocument().getData().getFileDescriptor());
FileOutputStream out = null;
try {
out = new FileOutputStream(destFile);
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 (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} else
MyHelper.showLongToast(this, getString(R.string.invalidfiletype));
printJob.complete();
}
Can anybody help me why image is corrupted?
In an app I am making people can download a PDF file. On my Nexus 5 there is on problem when downloading the PDF but on an HTC One X I get an Out of Memory error. How can I avoid this? The code I am using is:
#Override
protected Boolean doInBackground(String... params) {
String fileUrl = params[0];
mFileName = params[1];
mFolder = new File(mContext.getFilesDir(), "pdfs");
mFolder.mkdir();
Random r = new Random();
int i1 = r.nextInt(99 - 10) + 99;
mFile = new File(mFolder, mFileName + "." + i1);
try {
mFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
try {
System.gc();
URL url = new URL(fileUrl);
HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection();
urlConnection.connect();
InputStream inputStream = urlConnection.getInputStream();
FileOutputStream fileOutputStream = new FileOutputStream(mFile);
int totalSize = urlConnection.getContentLength();
byte[] buffer = new byte[MEGABYTE];
int bufferLength = 0;
long total = 0;
while((bufferLength = inputStream.read(buffer))>0 ){
total += bufferLength;
int progress = (int)((total * 100) / totalSize);
publishProgress(progress, (int)total, totalSize);
fileOutputStream.write(buffer, 0, bufferLength);
}
fileOutputStream.close();
return true;
} catch (FileNotFoundException e) {
mFile.delete();
e.printStackTrace();
} catch (MalformedURLException e) {
mFile.delete();
e.printStackTrace();
} catch (IOException e) {
mFile.delete();
e.printStackTrace();
}
return false;
}
#Override
protected void onPostExecute(Boolean success) {
if(mOnDownloadListener != null) {
File to = new File(mFolder, mFileName);
mFile.renameTo(to);
mOnDownloadListener.onDownloaded(success);
}
super.onPostExecute(success);
}
I'm trying to download an apk file then install it.
I have done it with an external storage directory but when I download the file in a Local directory I can't parse it.
Here is the code on OnCreate method
final DownloadTask downloadTask = new DownloadTask(this);
downloadTask.execute("http://file.appsapk.com/wp-content/uploads/apps-2/Gmail.apk","Gmail.apk");
DownloadTask is a class that extends from AsyncTask.
Here is the background task:
#Override
protected String doInBackground(String... sUrl) {
file_name=sUrl[1];
Boolean isSDPresent = android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
if (isSDPresent) {
directory = new File(Environment.getExternalStorageDirectory()+File.separator+"app_directory");
}
else
{
directory = getFilesDir();
}
if (!directory.exists())
directory.mkdirs();
InputStream input = null;
OutputStream output = null;
HttpURLConnection connection = null;
try {
URL url = new URL(sUrl[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
return "Server returned HTTP " + connection.getResponseCode()
+ " " + connection.getResponseMessage();
}
int fileLength = connection.getContentLength();
input = connection.getInputStream();
output = new FileOutputStream(directory+"/"+file_name);
byte[] buffer = new byte[1024];
long total = 0;
int count;
while ((count = input.read(buffer)) != -1) {
if (isCancelled()) {
input.close();
return null;
}
total += count;
if (fileLength > 0) // only if total length is known
publishProgress((int) (total * 100 / fileLength));
output.write(buffer, 0, count);
}
} catch (Exception e) {
return e.toString();
} finally {
try {
if (input != null)
input.close();
if (output != null)
output.close();
} catch (IOException ignored) {
}
if (connection != null)
connection.disconnect();
}
return null;
}
And this is the post execution method that runs after the first one done downloading the file:
#Override
protected void onPostExecute(String result) {
mWakeLock.release();
mProgressDialog.dismiss();
if (result != null)
{
Toast.makeText(context,"Download error: "+result, Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(context, "File downloaded", Toast.LENGTH_SHORT).show();
File file = new File(directory, file_name);
Intent promptInstall = new Intent(Intent.ACTION_VIEW)
.setDataAndType(Uri.fromFile(file),
"application/vnd.android.package-archive");
context.startActivity(promptInstall);
finish();
}
It runs perfectly with an external storage but it won't run with an external one. Why not?
Try to use openfileoutput() rather than OutputStream in saving your file in internal storage and allow it to be readable. http://developer.android.com/guide/topics/data/data-storage.html#filesInternal . The package error is mainly caused by the permission of internal storage.
It's because of android application can not read from another application file if it is written using PRIVATE mode.So you have to change the mode of the file. i have just modify else part of your onPostExecute() method below.
try {
String tempfile="xyzfile";
File file = new File(directory, file_name);
FileInputStream inStream = new FileInputStream(file);
FileOutputStream fos = context.openFileOutput(tempfile,
context.MODE_WORLD_WRITEABLE | context.MODE_WORLD_READABLE);
byte[] buffer = new byte[1024];
int length;
// copy the file content in bytes
while ((length = inStream.read(buffer)) > 0) {
fos.write(buffer, 0, length);
}
inStream.close();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
File file = new File(context.getFilesDir(), tempfile);
Intent promptInstall = new Intent(Intent.ACTION_VIEW).setDataAndType(
Uri.fromFile(file), "application/vnd.android.package-archive");
context.startActivity(promptInstall);
How to receive original content and file name from server side code.
Client Code
public void send1(Socket socket)
{
try
{
dataOutputStream = new DataOutputStream(socket.getOutputStream());
File file = new File(Environment.getExternalStorageDirectory().toString() + "/" + "temp.txt");
FileInputStream fis = new FileInputStream(file);
//write file length
dataOutputStream.writeLong(file.length());
Log.i("File Size", "" + file.length());
//write file names
dataOutputStream.writeUTF(file.getName());
Log.i("File Name", "" + file.getName());
//write file to dos
byte[] buf = new byte[4092];
int n = 0;
while((n = fis.read(buf)) != -1)
{
Log.i("length bytes", "" + n);
dataOutputStream.write(buf, 0, n);
}
dataOutputStream.flush();
dataOutputStream.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
File Name as temp.txt and Content as Hello
Server Code
public void receive1(Socket socket)
{
try
{
inputStream = socket.getInputStream();
dataInputStream = new DataInputStream(inputStream);
File file = new File(Environment.getExternalStorageDirectory().toString() + "/" + "test.txt");
FileOutputStream fos = new FileOutputStream(file);
int n = 0;
byte[] buf = new byte[4092];
//read file name
/*String fileName = "";
try
{
fileName = dataInputStream.readUTF();
}
catch (Exception e)
{
e.printStackTrace();
}
Log.i("File Name", "" + fileName);*/
//read file size
long fileSize = 0;
try
{
fileSize = dataInputStream.readLong();
}
catch (Exception e)
{
e.printStackTrace();
}
Log.i("File Size", "" + fileSize);
//read file
while((n = dataInputStream.read(buf)) != -1)
{
Log.i("length bytes", "" + n);
fos.write(buf, 0, n);
}
fos.flush();
fos.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
File Name as test.txt and Content as temp.txtHello.
In this test.txt file, contains temp.txt. I am not getting file name from dataInputStream.readUTF().
Where I mistaken code...
If I called readUTF() method, then I am getting the Exception
Exception as
java.io.EOFException
at libcore.io.Streams.readFully(Streams.java:83)
at java.io.DataInputStream.readFully(DataInputStream.java:99)
at java.io.DataInputStream.decodeUTF(DataInputStream.java:178)
at java.io.DataInputStream.decodeUTF(DataInputStream.java:173)
at java.io.DataInputStream.readUTF(DataInputStream.java:169)
You wrote the Long before the String in the inputStream of the send method. What you did in the server code is that you are expecting to recieve String before the Long which in reserved on what you did in your send method.
solution:
switch reading long first then string
sample:
//read file size
long fileSize = 0;
try
{
fileSize = dataInputStream.readLong();
}
catch (Exception e)
{
e.printStackTrace();
}
Log.i("File Size", "" + fileSize);
//read file name
String fileName = "";
try
{
fileName = dataInputStream.readUTF();
}
catch (Exception e)
{
e.printStackTrace();
}
Log.i("File Name", "" + fileName);
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);
}
}