We Keep Coding

Java decompression of files from solr server

I am getting error when i am trying to decompressing the files coming from server,but i am getting error of invalid bit length in while loop.Is there any problem with code or encoding.
byte[] buffer = new byte[1024];
FileInputStream fileInput = null;
FileOutputStream fileOutputStream = null;
GZIPInputStream gzipInputStream = null;
System.out.println(source_compressed_filepath);
System.out.println(destinaton_decompressed_filepath);
try {
fileInput = new FileInputStream(source_compressed_filepath);
gzipInputStream = new GZIPInputStream(fileInput);
fileOutputStream = new FileOutputStream(destinaton_decompressed_filepath);
int len;
while ((len = gzipInputStream.read(buffer)) >=0) {
fileOutputStream.write(buffer, 0, len);
}
System.out.println("The file" + source_compressed_filepath + " was DeCompressed successfully!"
+ destinaton_decompressed_filepath);
}catch (IOException ex) {
System.out.println(" error in file decompression " + source_compressed_filepath);
} finally {
// close resources
try {
fileOutputStream.close();
gzipInputStream.close();
} catch (IOException e) {
}
}

How to Zip a folders and download

I have implemented the download of files. It is downloading and saving it to memory.
Now my problem is, if there is folder and sub folder, I need to ZIP the folder and download the zip file and save it in memory. I tried lot but I did'nt find a solution. Can any one can guide me to get the solution?
Here my download single file code...
#Override
protected String doInBackground(String... sUrl) {
InputStream input = null;
OutputStream output = null;
ZipOutputStream zos = 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();
}
String fileName = tvtitle.getText().toString();
String fileExtension = tvtype.getText().toString();
File imageDirectory = new File(Path);
imageDirectory.mkdirs();
int fileLength = connection.getContentLength();
String _path = Path;
input = connection.getInputStream();
File outputFile = new File(_path, fileName + fileExtension);
output = new FileOutputStream(outputFile);
// zos = new ZipOutputStream(output);
byte data[] = new byte[4096];
long total = 0;
int count;
while ((count = input.read(data)) != -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(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;
}

first add permission in manifest
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
call this method by passing "inputFolderPath" and "outputFolderPath"
private static void zipFolder(String inputFolderPath, String outZipPath) {
try {
FileOutputStream fos = new FileOutputStream(outZipPath);
ZipOutputStream zos = new ZipOutputStream(fos);
File srcFile = new File(inputFolderPath);
File[] files = srcFile.listFiles();
Log.d("", "Zip directory: " + srcFile.getName());
for (int i = 0; i < files.length; i++) {
Log.d("", "Adding file: " + files[i].getName());
byte[] buffer = new byte[1024];
FileInputStream fis = new FileInputStream(files[i]);
zos.putNextEntry(new ZipEntry(files[i].getName()));
int length;
while ((length = fis.read(buffer)) > 0) {
zos.write(buffer, 0, length);
}
zos.closeEntry();
fis.close();
}
zos.close();
} catch (IOException ioe) {
Log.e("", ioe.getMessage());
}
}

Android several images downloaded from server are being corrupted

I'm using a function to download an image from a server to the internal memory of my android device, the function is :
private void downloadFile(String myurl, String name) {
// TODO Auto-generated method stub
int count=0;
try {
URL url = new URL(myurl);
URLConnection conexion = url.openConnection();
conexion.connect();
lenghtOfFile = conexion.getContentLength();
Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream(Environment.getExternalStorageDirectory().getAbsolutePath() + "/test library/"+name.replace(" ","")+".png");
byte data[] = new byte[1024];
total = 0;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress(""+(int)((total*100)/lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {a=e.toString();}
}
I have 22 images on the server, the problem is that some images are being downloaded as corrupted files, any help please ?

How to write files to an SD Card from the internet?

An example would be a simple image.
I have tried so many things and it just refuses to work despite making a whole lot of sense.
What I've done so far is I'm able to grab 25 pictures and add them to
/sdcard/app name/sub/dir/filename.jpg
They all appear there according to the DDMS but they always have a filesize of 0.
I'm guessing it's probably because of my input stream?
Here's my function that handles the downloading and saving.
public void DownloadPages()
{
for (int fileC = 0; fileC < pageAmount; fileC++)
{
URL url;
String path = "/sdcard/Appname/sub/dir/";
File file = new File(path, fileC + ".jpg");
int size=0;
byte[] buffer=null;
try{
url = new URL("http://images.bluegartr.com/bucket/gallery/56ca6f9f2ef43ab7349c0e6511edb6d6.png");
InputStream in = url.openStream();
size = in.available();
buffer = new byte[size];
in.read(buffer);
in.close();
}catch(Exception e){
}
if (!new File(path).exists())
new File(path).mkdirs();
FileOutputStream out;
try{
out = new FileOutputStream(file);
out.write(buffer);
out.flush();
out.close();
}catch(Exception e){
}
}
}
It just keeps giving me 25 files in that directory but all of their file sizes are zero. I have no idea why. This is practically the same code I've used in a java program.
PS...
If you're gonna give me a solution... I've already tried code like this. It doesn't work.
try{
url = new URL(urlString);
in = new BufferedInputStream(url.openStream());
fout = new FileOutputStream(filename);
byte data[] = new byte[1024];
int count;
System.out.println("Now downloading File: " + filename.substring(0, filename.lastIndexOf(".")));
while ((count = in.read(data, 0, 1024)) != -1){
fout.write(data, 0, count);
}
}finally{
System.out.println("Download complete.");
if (in != null)
in.close();
if (fout != null)
fout.close();
}
}
Here's an image of what my directories look like
http://oi48.tinypic.com/2cpcprm.jpg

A bit change to your second option, try it as following way,
byte data[] = new byte[1024];
long total = 0;
int count;
while ( ( count = input.read(data)) != -1 )
{
total += count;
output.write( data,0,count );
}
This one is different in while statement while ((count = in.read(data, 0, 1024)) != -1)

Using Guava something like this should work:
String fileUrl = "xxx";
File file = null;
InputStream in;
FileOutputStream out;
try {
Uri url = new URI(fileUrl);
in = url.openStream();
out = new FileOutputStream(file)
ByteStreams.copy(in, out);
}
catch (IOException e) {
System.out.println(e.toString());
}
finally {
in.close();
out.flush();
out.close();
}

Getting SQLiteDatabaseCorruptException

The issue is that I'm getting the SqLiteDatabaseCorrupException while executing the next code:
ArrayList<Advertiser> arr = new ArrayList<Advertiser>();
Cursor holo = db.rawQuery("select * from Advertiser;", null);
while(holo.moveToNext()){
Advertiser adver = new Advertiser();
adver.setId(holo.getString(0));
adver.setNombre(holo.getString(1));
adver.setDescripcion(holo.getString(2));
adver.setDireccion(holo.getString(3));
adver.setContacto(holo.getString(4));
adver.setSitioWeb(holo.getString(5));
adver.setFacebook(holo.getString(6));
adver.setTwitter(holo.getString(7));
adver.setPosx(holo.getDouble(8));
adver.setPosy(holo.getDouble(9));
adver.setCiudad(holo.getString(10));
System.out.println("Objeto: " + adver.toString());
arr.add(adver);
}
What happens is that the while starts executing normally, but it gets to a point when the log cat shows that the database is corrupt and then the database gets eliminated.
Any reasons why this is happening?
EDITED:
I forgot to add, my application downloads the database when the main activity stars, does that has something to do with the database getting corrupted? The database is downloaded and stored on the sd card.
EDITED #2:
Here is the code of how I downloaded the database, hope that this helps:
public void DescargaBD() {
try {
URL url = new URL(
"http://71.6.150.179:8079/dbHandler.axd?SqliteDbVersion=0");
HttpURLConnection urlConnection = (HttpURLConnection) url
.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
File SDCardRoot = Environment.getExternalStorageDirectory();
File file = new File(SDCardRoot, "DirLaguna.db");
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
int totalSize = urlConnection.getContentLength();
int downloadedSize = 0;
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ((bufferLength = inputStream.read(buffer)) > 0) {
fileOutput.write(buffer, 0, bufferLength);
downloadedSize += bufferLength;
}
fileOutput.close();
location = file.getAbsolutePath();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
Thanks in advance.