like the title states i am simply trying to download a test.txt file, the following url and save it internally, ideally within drawable.
i have been trying to modify this to work but will little success i keep getting "unable to download null" errors
int count;
try {
URL url = new URL("https://www.darkliteempire.gaming.multiplay.co.uk/testdownload.txt");
URLConnection conexion = url.openConnection();
conexion.connect();
int lenghtOfFile = conexion.getContentLength();
InputStream is = url.openStream();
File testDirectory = new File(Environment.getExternalStorageDirectory() + "/Download");
if (!testDirectory.exists()) {
testDirectory.mkdir();
}
FileOutputStream fos = new FileOutputStream(testDirectory + "/test.txt");
byte data[] = new byte[1024];
long total = 0;
int progress = 0;
while ((count = is.read(data)) != -1) {
total += count;
int progress_temp = (int) total * 100 / lenghtOfFile;
fos.write(data, 0, count);
}
is.close();
fos.close();
} catch (Exception e) {
Log.e("ERROR DOWNLOADING", "Unable to download" + e.getMessage());
}
There must be a simpler way to do this?
the file itself is tiny with perhaps 3 or 4 lines of text so i dont need anything fancy
Please Update your below code line and write valid url.
URL url = new URL("https://www.http://darkliteempire.gaming.multiplay.co.uk/testdownload.txt");
after write valid url your code line look like this.
URL url = new URL("http://www.darkliteempire.gaming.multiplay.co.uk/testdownload.txt");
it will solve your problem.
Using AQuery library you get something pretty straightforward. Plus you'll get hips of other cool functions to shorten your code.
http://code.google.com/p/android-query/wiki/AsyncAPI
String url = "https://picasaweb.google.com/data/feed/base/featured?max-results=16";
File ext = Environment.getExternalStorageDirectory();
File target = new File(ext, "aquery/myfolder/photos.xml");
aq.progress(R.id.progress).download(url, target, new AjaxCallback<File>(){
public void callback(String url, File file, AjaxStatus status) {
if(file != null){
showResult("File:" + file.length() + ":" + file, status);
}else{
showResult("Failed", status);
}
}
});
Related
I am trying to use JAVA NIO to transfer a file from host A to client B without having to download the file locally and then giving the client B a link to download the file.
I am running a spark Apache framework and using maven project.
I mapped the request http://localhost:8080/download/hello in Spark using :
get("/download/:id",RequestHandler::downloadHandler);
Inside of the function is the code that downloads the file from :
"https://download.springsource.com/release/STS/3.8.1.RELEASE/dist/e4.6/spring-tool-suite-3.8.1.RELEASE-e4.6-linux-gtk-x86_64.tar.gz"
try {
URL url = new URL("https://download.springsource.com/release/STS/3.8.1.RELEASE/dist/e4.6/spring-tool-suite-3.8.1.RELEASE-e4.6-linux-gtk-x86_64.tar.gz");
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
int respCode = +httpURLConnection.getResponseCode();
System.out.println("response code : "+respCode);
if (respCode == HttpURLConnection.HTTP_OK){
String fileName = "";
String disposition = httpURLConnection.getHeaderField("Content-Disposition");
String contentType = httpURLConnection.getContentType();
int contentLength = httpURLConnection.getContentLength();
if (disposition != null) {
// extracts file name from header field
int index = disposition.indexOf("filename=");
if (index > 0) {
fileName = disposition.substring(index + 10,
disposition.length() - 1);
}
} else {
// extracts file name from URL
fileName = url.toString().substring(url.toString().lastIndexOf("/") + 1,
url.toString().length());
}
System.out.println("Content-Type = " + contentType);
System.out.println("Content-Disposition = " + disposition);
System.out.println("Content-Length = " + contentLength);
System.out.println("fileName = " + fileName);
httpURLConnection.disconnect();
System.out.println("other stuff : ");
System.out.println(url.getHost());
ReadableByteChannel readableByteChannel = Channels.newChannel(url.openStream());
FileOutputStream fileOutputStream = new FileOutputStream(fileName);
FileChannel fileChannel = fileOutputStream.getChannel();
fileChannel.transferFrom(readableByteChannel, 0, Long.MAX_VALUE);
fileOutputStream.close();
readableByteChannel.close();
}
} catch (IOException e) {
e.printStackTrace();
}
I fetch the filename and file size using httpURLConnection and then processed to download the file. what I am trying to do is, instead of downloading the file locally using fileChannel.transferFrom(readableByteChannel, 0, Long.MAX_VALUE) transfer the file directly to the client.
I did some research and I think it is possible with using Socketchannels but I didn't understand how it is supposed to work.
I also read this article
https://examples.javacodegeeks.com/core-java/nio/java-nio-large-file-transfer-tutorial/
and tried to understand the class Reciever, but it is still not clear to me how.
I would appreciate some guidance. Thank you
I'm struggling against the uncompleted download of a file.
For example, I upload some data on github :https://gist.githubusercontent.com/rdanniau/3b7f26bb1101b28400bf24f2f9664828/raw/980d6ff511404bf14d3efc56be3dfb081541991f/LEDirium.hex
and on pasteBin : http://pastebin.com/raw/FcVfLf5b
I want to retrieve them and save them into a file "filename".
I've watch a lot of example on internet and it must be working.
Here is the code :
private void download(final URL myUrl){
new Thread(new Runnable() {
//InputStream is = null;
//FileOutputStream fos = null;
public void run() {
try {
URLConnection connection = myURLL.openConnection();
//HttpURLConnection connection = (HttpURLConnection) myUrl.openConnection();
//connection.setRequestMethod("GET");
connection.setReadTimeout(5000);
connection.setConnectTimeout(10000);
connection.connect();
//is = myUrl.openStream();
is = connection.getInputStream();
File file = new File(context.getFilesDir(),fileName);
file.delete();
file = new File(context.getFilesDir(),fileName);
fos = new FileOutputStream(file);
byte data[] = new byte[1024];
String str ="";
int count = 0;
while ((count = is.read(data)) != -1) {
fos.write(data, 0, count);
}
is.close();
fos.close();
}
catch (Exception e) {
downloadedFileCallback.onError(e);
Log.e("DownloadedFile", "Unable to download : " + e.getMessage() + " cause :" + e.getCause());
return;
}
downloadedFileCallback.onDownloadedFinished();
readFile(context);
}
}).start();
}
public void readFile(Context context){
// read
try {
BufferedReader br = new BufferedReader(new FileReader(new File(context.getFilesDir(),fileName)));
String line;
while ((line = br.readLine()) != null) {
Log.v("DL", line);
}
br.close();
}
catch (Exception e) {
Log.e("DownloadedFile", "Unable to read : " + e.getMessage() + " cause :" + e.getCause());
}
//Log.v("DownloadedFile", text.toString());
}
where myURL are called like
URL myURL = new URL("http://pastebin.com/raw/FcVfLf5b");
In the Log.v, I can see that I downloaded only a part of the file which is never the same (it could be the entire file, the half, the quarter, we don' know...)
It's probably the inputStream connection which is closed too fast. But why ?
Last question, instead of using Log.v to check if the file is correctly downloaded. Where can I found it on my phone ? I searched in many folders but I never seen my File.
Thanks a lot for any advice
EDIT : It seems to be the same here InputStream returns -1 before end of file but no one answered.
I have following problem. I have to download pdf files from a server and some of them have whitespaces in their names. So every file will be downloaded, but those, which have whitespaces can not be opened.
If I access this files on the server via chrome, they open well (also with the whitespace in the url).
And what I am wondering about is, that java says the files will be downloaded. But when I try to open them in Acrobat Reader, it shows me an error message, that the files are damaged. Here is the sample of my code:
public static void downloadFile(String fileURL, String saveDir) throws IOException {
Authenticator.setDefault(new Authenticator() {
#Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("*****", "*********".toCharArray());
}
});
final int BUFFER_SIZE = 4096;
URL url = new URL(fileURL);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
String credentials = "ptt" + ":" + "ptt123";
String encoding = Base64.getEncoder().encodeToString(credentials.getBytes(StandardCharsets.UTF_8));
httpConn.setRequestProperty("Authorization", String.format("Basic %s", encoding));
int responseCode = 0;
responseCode = httpConn.getResponseCode();
// always check HTTP response code first
if (responseCode == HttpURLConnection.HTTP_OK) {
String fileName = "";
String disposition = httpConn.getHeaderField("Content-Disposition");
String contentType = httpConn.getContentType();
int contentLength = httpConn.getContentLength();
if (disposition != null) {
// extracts file name from header field
int index = disposition.indexOf("filename=");
if (index > 0) {
fileName = disposition.substring(index + 10,
disposition.length() - 1);
}
} else {
// extracts file name from URL
fileName = fileURL.substring(fileURL.lastIndexOf("/") + 1,
fileURL.length());
}
// opens input stream from the HTTP connection
InputStream inputStream = httpConn.getInputStream();
String saveFilePath = saveDir + File.separator + fileName;
// opens an output stream to save into file
FileOutputStream outputStream = new FileOutputStream(saveFilePath);
int bytesRead = -1;
byte[] buffer = new byte[BUFFER_SIZE];
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.close();
inputStream.close();
System.out.println("File downloaded");
} else {
System.out.println("No file to download. Server replied HTTP code: " + responseCode);
}
httpConn.disconnect();
}
I also tried to replace the whitespace through "%20" in the fileUrl.
So what can be the problem? As I wrote above, the files without any whitespace can be opened after the the download without any problems.
I use Java 1.7.
Cheers,
Andrej
if fileName contains space then replace it to some other charecter. it may work, if not please let me know.
if(fileName.trim().contains(" "))
fileName.replace(" ","_");
URL url = new URL(URLEncoder.encode(fileUrl, "UTF-8"));
Android how to use Environment.getExternalStorageDirectory()
How can i use Environment.getExternalStorageDirectory() to read/write a image from the SD card ? or is there a better way to do it?
I did use the source to download e save the image:
try {
URL url = new URL(urlBaseImagem + icone);
URLConnection conection = url.openConnection();
conection.connect();
// this will be useful so that you can show a tipical 0-100% progress bar
int lenghtOfFile = conection.getContentLength();
//
// download the file
InputStream input = new BufferedInputStream(url.openStream(), 8192);
// Output stream
//File sdCard = Environment.getExternalStoragePublicDirectory(DOWNLOAD_SERVICE);
File sdCard = Environment.getExternalStorageDirectory();
File directory = new File(sdCard.getAbsolutePath() + "/cardapioweb/rest/");
if(directory.exists() == false){
directory.mkdirs();
}
File outputFile = new File(directory, icone);
OutputStream output = new FileOutputStream(outputFile);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
// After this onProgressUpdate will be called
//publishProgress(""+(int)((total*100)/lenghtOfFile));
// writing data to file
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
Log.w("CardapioWeb:" , "Imagem " + outputFile.toString() + " salva no sdcard");
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
I did use the source to load e show the image:
File arq = new File(this.sdCard.getAbsolutePath() + "/cardapioweb/rest/" + filialDataCollection.get(position).get(KEY_ICONE));
//verifica se a imagem foi baixada com sucesso
if(arq.exists() == true){
//deve exibir a imagem do sdcard
File outputFile1 = new File(this.sdCard.getAbsolutePath() + "/cardapioweb/rest/", filialDataCollection.get(position).get(KEY_ICONE));
Drawable imagem = Drawable.createFromPath(outputFile1.toString());
holder.tvWeatherImage.setImageDrawable(imagem);
}
The above codes works perfectly fine on the emulator (Android Virtual Device) with Eclipse !!!!
But when I generate the apk and install on my Galaxy S4, the app can not read images (no error is generated). Just does not display the images. What could be wrong?
Put a log in your code to see what
outputFile1.toString();
actually points to, is it what you expect?
Personally, I would have used outputFile1.getAbsolutePath(); NOT the line below:
Drawable imagem = Drawable.createFromPath(outputFile1.toString());
I have the following code. Everything works fine except that the downloded MP3 file does not have any property (metadata) such as Artist, title and etc when I play using the default music player. If tried to download the same mp3 file from the site directly using android browser and play using the default music player, all the metatdata are intact (ie. music player display title, artist and etc).
#Override
protected String doInBackground(String... aurl) {
int count;
i = Integer.parseInt(aurl[0]);
try {
sura = "abc.mp3";
String addr = "http://www.xyzabc.com/" + sura;
URL url = new URL(addr);
HttpURLConnection conexion = (HttpURLConnection) url.openConnection();
conexion.setRequestMethod("GET");
conexion.setDoOutput(true);
conexion.connect();
int lenghtOfFile = conexion.getContentLength();
InputStream input = new BufferedInputStream(url.openStream());
File file = new File(rootDir + "/mysite/" + sura);
OutputStream output = new FileOutputStream(file);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1 & run == true) {
total += count;
publishProgress("" + (int) ((total * 100) / lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {
}
return null;
}
The System content provider didn't update as soon as your downloading complete.
Try restart your emulator or install/unstall your sd card, see if the content provider updates.
The uri is MediaStore.Audio.Media.EXTERNAL_CONTENT_URI and you can get details by query MediaStore.Audio.Media.DATA, MediaStore.Audio.Media.TITLE,
MediaStore.Audio.Media.COMPOSER, MediaStore.Audio.Media.ALBUM,
MediaStore.Audio.Media.ARTIST and others (All in MediaStore.Audio.Media.*)
If you want to get the information immediately, maybe you should update the Content Provider manual by yourself.