Develop Reference

How to download file in Android over HTTPs

I am downloading a file in android which goes via plain HTTP. Now i want this connection to go over HTTPs and then download file, can someone help me in code what changes will i need to do that.
I changed
URLConnection ucon = url.openConnection();
to
//HttpsURLConnection ucon = (HttpsURLConnection) url.openConnection();
but that didn't work.
Code:
private void DownloadFile() {
try {
File root = android.os.Environment
.getExternalStorageDirectory();
File dir = new File(root.getAbsolutePath() + "/File");
if (dir.exists() == false) {
dir.mkdirs();
}
URL url = new URL(DownloadFile); // you can write here any link
File file = new File(dir, fileName);
long startTime = System.currentTimeMillis();
Log.d(LOG_TAG, "download begining");
Log.d(LOG_TAG, "download url:" + url);
Log.d(LOG_TAG, "downloaded file name:" + fileName);
/* Open a connection to that URL. */
URLConnection ucon = url.openConnection();
//HttpsURLConnection ucon = (HttpsURLConnection) url.openConnection();
/*
* Define InputStreams to read from the URLConnection.
*/
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
/*
* Read bytes to the Buffer until there is nothing more to
* read(-1).
*/
ByteArrayBuffer baf = new ByteArrayBuffer(5000);
int current = 0;
while ((current = bis.read()) != -1) {
baf.append((byte) current);
}
/* Convert the Bytes read to a String. */
FileOutputStream fos = new FileOutputStream(file);
fos.write(baf.toByteArray());
fos.flush();
fos.close();
Log.d(LOG_TAG,
"download ready in"
+ ((System.currentTimeMillis() - startTime) / 1000)
+ " sec");
} catch (IOException e) {
Log.d(LOG_TAG, "Error: " + e);
}
}

Try this:
URL url = new URL("some url");
//create the new connection
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
//set up some things on the connection
urlConnection.setRequestMethod("GET");
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("/sdcard/"+"Some Folder Name/");
//create a new file, specifying the path, and the filename
//which we want to save the file as.
File file = new File(SDCardRoot,"some file name");
//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
int totalSize = urlConnection.getContentLength();
//variable to store total downloaded bytes
int downloadedSize = 0;
//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;
int progress=(int)(downloadedSize*100/totalSize);
//this is where you would do something to report the prgress, like this maybe
//updateProgress(downloadedSize, totalSize);
}
//close the output stream when done
fileOutput.close();

Downloading the different formated images from url and storing it on sdcard

I am trying to download the images from url and storing it on sd card, it works fine for .jpg file but if image extension are .png or .jpeg then it is giving error , i want to download the diferent format images at the same time ..below is code which i have typed..
public void DownloadFromUrl(String DownloadUrl, String fileName) {
try {
File dir = new File("/sdcard/pluto");
if (dir.exists() == false) {
dir.mkdirs();
}
URL url = new URL(DownloadUrl); // you can write here any link
File file = new File(dir, fileName);
long startTime = System.currentTimeMillis();
Log.d("DownloadManager", "download begining");
Log.d("DownloadManager", "download url:" + url);
Log.d("DownloadManager", "downloaded file name:" + fileName);
/* Open a connection to that URL. */
URLConnection ucon = url.openConnection();
/*
* Define InputStreams to read from the URLConnection.
*/
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
/*
* Read bytes to the Buffer until there is nothing more to read(-1).
*/
ByteArrayBuffer baf = new ByteArrayBuffer(5000);
int current = 0;
while ((current = bis.read()) != -1) {
baf.append((byte) current);
}
/* Convert the Bytes read to a String. */
FileOutputStream fos = new FileOutputStream(file);
fos.write(baf.toByteArray());
fos.flush();
fos.close();
Log.d("DownloadManager",
"download ready in"
+ ((System.currentTimeMillis() - startTime) / 1000)
+ " sec");
} catch (IOException e) {
Log.d("DownloadManager", "Error: " + e);
}
}
please help me..

Try this may be helpful .
same post with different image format.
Image download code works for all image format, issues with PNG format rendering

Replace the file from URL to raw folder

guys i have a text file in my URL.On click of a button i am able to download it to sdcard.
But i need to replace the downloaded file with the file in raw folder.Both are different files.
this is how i am downloading from URL
File sdcard = Environment.getExternalStorageDirectory();
File dir = new File (sdcard.getAbsolutePath() + "/varun");
dir.mkdirs();
try {
u = new URL("http://hihowru.com/123.xml");
file = new File(dir,"123.xml");
startTime = System.currentTimeMillis();
Log.d("DownloadManager", "download begining");
Log.d("DownloadManager", "download url:" + url);
Log.d("DownloadManager", "downloaded file name:" + "a.mp3");
URLConnection uconnection = u.openConnection();
InputStream is = uconnection.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
baf = new ByteArrayBuffer(5000);
int current = 0;
while ((current = bis.read()) != -1) {
baf.append((byte) current);
}
FileOutputStream fos;
fos = new FileOutputStream(file);
fos.write(baf.toByteArray());
fos.flush();
fos.close();
Toast toast = Toast.makeText(getApplicationContext(), "Downloaded to Sdcard/varun"+audioxml, 0);
toast.show();
Log.d("DownloadManager", "download ready in" + ((System.currentTimeMillis() - startTime) / 1000) + " sec");
Intent ii = new Intent(DownloadFiles.this,Relaxation.class);
startActivity(ii);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
but i need to replace this file(downloaded file) with the file in raw folder
download file name : hi.txt
raw folder name : hw.txt
how to acheive this please help

You can't modify or write a file in android resources or asset directory. Because of android apk file is read only. So you are able to only read it. Best way is copy that file in internal storage then use from that path, also after download file from url update that at internal storage path.
Update:
Code for copy file from /asset to application internal storage.
private void copyFile(String filename) {
AssetManager assetManager = this.getAssets();
InputStream in = null;
OutputStream out = null;
try {
in = assetManager.open(filename);
String newFileName = "/data/data/" + this.getPackageName() + "/" + filename;
out = new FileOutputStream(newFileName);
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e) {
Log.e("tag", e.getMessage());
}
}

Can't download file in Android phone - Android..?

I having problem with file download,
I am able to download file in emulator but It is not working with the phone.
I have defined the permission for the Internet and write SD card.
I having one doc file on server, and if user click on download. It downloads the file. This works fine in emulator but not working in phone.
Edit
My code for download file
public void downloadFile(String _url, String fileName) {
File PATH = Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
try {
PATH.mkdirs();
URL url = new URL(_url); // you can write here any link
File file = new File(PATH, fileName);
long startTime = System.currentTimeMillis();
Log.d("Manager", "download begining");
Log.d("DownloadManager", "download url:" + url);
Log.d("DownloadManager", "downloaded file name:" + fileName);
/* Open a connection to that URL. */
URLConnection ucon = url.openConnection();
/*
* Define InputStreams to read from the URLConnection.
*/
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
/*
* Read bytes to the Buffer until there is nothing more to read(-1).
*/
ByteArrayBuffer baf = new ByteArrayBuffer(50);
int current = 0;
while ((current = bis.read()) != -1) {
baf.append((byte) current);
}
/* Convert the Bytes read to a String. */
FileOutputStream fos = new FileOutputStream(file);
fos.write(baf.toByteArray());
fos.close();
Log.d("ImageManager",
"download ready in"
+ ((System.currentTimeMillis() - startTime) / 1000)
+ " sec");
} catch (IOException e) {
Log.d("ImageManager", "Error: " + e);
}
}

try the snippets given bellow...
File PATH = Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
try {
//set the download URL, a url that points to a file on the internet
//this is the file to be downloaded
_url = _url.replace(" ", "%20");
URL url = new URL(_url);
//create the new connection
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
//set up some things on the connection
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
//and connect!
urlConnection.connect();
//create a new file, specifying the path, and the filename
//which we want to save the file as.
File file = new File(PATH,fileName);
//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
int totalSize = urlConnection.getContentLength();
Log.i("Download", totalSize+"");
//variable to store total downloaded bytes
// int downloadedSize = 0;
//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);
}
//close the output stream when done
fileOutput.close();
return true;
//catch some possible errors...
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
make sure you have enters the correct download path(url)

How to copy image to SD card in android

How Do I Copy songs or image to my SD Card. i.e download image and save to sd card in android.
Thanks , shiv

Try this code:
File src = new File(Your_current_file);
File dest = new File(destination_place);
public void copyFile(File src, File dest) throws IOException
{
InputStream in = new FileInputStream(src);
OutputStream out = new FileOutputStream(dest);
// Transfer bytes from in to out
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0)
{
out.write(buf, 0, len);
}
in.close();
out.close();
}
Make sure to Give the permission for External Storage if you need:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
Hope this will helps you.

File sdCard = Environment.getExternalStorageDirectory();
File dir = new File (sdcard.getAbsolutePath() + "/dir1/dir2");
dir.mkdirs();
File file = new File(dir, "filename");
FileOutputStream f = new FileOutputStream(file);
Dont forget to add permission:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

private final String PATH = "/data/data/com.whatever.whatever/"; //put the downloaded file here
public void DownloadFromUrl(String imageURL, String fileName) { //this is the downloader method
try {
URL url = new URL("http://yoursite.com/" + imageURL); //you can write here any link
File file = new File(fileName);
long startTime = System.currentTimeMillis();
Log.d("ImageManager", "download begining");
Log.d("ImageManager", "download url:" + url);
Log.d("ImageManager", "downloaded file name:" + fileName);
/* Open a connection to that URL. */
URLConnection ucon = url.openConnection();
/*
* Define InputStreams to read from the URLConnection.
*/
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
/*
* Read bytes to the Buffer until there is nothing more to read(-1).
*/
ByteArrayBuffer baf = new ByteArrayBuffer(50);
int current = 0;
while ((current = bis.read()) != -1) {
baf.append((byte) current);
}
/* Convert the Bytes read to a String. */
FileOutputStream fos = new FileOutputStream(file);
fos.write(baf.toByteArray());
fos.close();
Log.d("ImageManager", "download ready in"
+ ((System.currentTimeMillis() - startTime) / 1000)
+ " sec");
} catch (IOException e) {
Log.d("ImageManager", "Error: " + e);
}
}
And don't forget to add the following permissions:
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>

File path = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File file = new File(path, "DemoPicture.jpg");
try {
// Make sure the Pictures directory exists.
path.mkdirs();
// Very simple code to copy a picture from the application's
// resource into the external file. Note that this code does
// no error checking, and assumes the picture is small (does not
// try to copy it in chunks). Note that if external storage is
// not currently mounted this will silently fail.
InputStream is = //Input stream of the file downloaded;
OutputStream os = new FileOutputStream(file);
byte[] data = new byte[is.available()];
is.read(data);
os.write(data);
is.close();
os.close();
// Tell the media scanner about the new file so that it is
// immediately available to the user.
MediaScannerConnection.scanFile(this,
new String[] { file.toString() }, null,
new MediaScannerConnection.OnScanCompletedListener() {
public void onScanCompleted(String path, Uri uri) {
Log.i("ExternalStorage", "Scanned " + path + ":");
Log.i("ExternalStorage", "-> uri=" + uri);
}
});
} catch (IOException e) {
// Unable to create file, likely because external storage is
// not currently mounted.
Log.w("ExternalStorage", "Error writing " + file, e);
}