Develop Reference

How to Download Audio from URL using android

I'm new to android and for trainning i want to create an app that downloads audio from existing api.
i'm getting the link to downloading the file from the api, but i can't get it download properly
i've tried with download manager, in which, didn't even download it although it said it did.
here's the main code:
public void Download(String link)
{
downloadManager = (DownloadManager)m_context.getSystemService(m_context.DOWNLOAD_SERVICE);
Uri Download_Uri = Uri.parse(link);
DownloadManager.Request request = new DownloadManager.Request(Download_Uri);
//Restrict the types of networks over which this download may proceed.
request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
//Set whether this download may proceed over a roaming connection.
request.setAllowedOverRoaming(false);
//Set the title of this download, to be displayed in notifications (if enabled).
request.setTitle("Downloading " + m_name);
//Set a description of this download, to be displayed in notifications (if enabled)
request.setDescription("Downloader");
//Set the local destination for the downloaded file to a path within the application's external files directory
request.setDestinationInExternalFilesDir(m_context, Environment.DIRECTORY_DOWNLOADS, m_name +".mp3");
//Enqueue a new download and same the referenceId
downloadReference = downloadManager.enqueue(request);
}
m_context is MainActivity
link is url that contains the file for downloading.
I'm using broadcast receiver to see if the download completed, and it did so i try to open it but nothing happens.
I've also tried to download it without the DownloadManager, even though it downloaded it, the size is very very small (1-15 kb) but sometimes(not most of the time maybe 5%) it gives me the complete audio(according to size and time)
here's the code:
public void Download(final String link)
{
try {
Thread t= new Thread(){
public void run() {
int count;
try {
URL url = new URL(link);
URLConnection conexion = url.openConnection();
Thread.sleep(20000);
conexion.connect();
// this will be useful so that you can show a tipical 0-100% progress bar
int lenghtOfFile = conexion.getContentLength();
// downlod the file
InputStream input = new BufferedInputStream(url.openStream());
String storageState = Environment.getExternalStorageState();
if (storageState.equals(Environment.MEDIA_MOUNTED)) {
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/Music",m_name+".mp3");
OutputStream output = new FileOutputStream(file);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
}
} catch (Exception e) {
downloadSuccess = false;
e.printStackTrace();
}
}
};
t.start();
t.join();
} catch (InterruptedException e) {
downloadSuccess = false;
e.printStackTrace();
}
}
you will see thread.sleep, i've assumed that the response needs a little time to process but even a minute didn't finish.
Any guidance will be appreciated
Thank you
UPDATE:
There's something called GZIPInputStream that the encoding of the files that failed download correctly are in gzip
peace of code:
if ("gzip".equals(httpConn.getContentEncoding())) {
BufferedReader in= new BufferedReader(new InputStreamReader(new GZIPInputStream(httpConn.getInputStream())));
StringBuilder sb = new StringBuilder();
String read;
while ((read = in.readLine()) != null){
sb.append(read);
}
}
it's still not helping me to download in the correct way but i think it's the right path, and again any help will be great. thank you

Wrong Mime-Type when downloading binary file on mobile data (Android)

I'm trying to download a binary file using:
URL url = new URL(urlStr);
HttpURLConnection ucon = (HttpURLConnection) url.openConnection();
ucon.connect();
InputStream is = new BufferedInputStream(ucon.getInputStream());
When run via mobile data (on Samsung Galaxy 4, Android 5.0.1) I receive the following response
j���UFEHLER��6ERROR��`Заявеното съдържание не може да бъде заредено ��&Wrong MIME-Type���Fback��2
Which means "The content requested cannot be loaded" in Bulgarian (the server I download from is Bulgaria). But more informative seems "Wrong MIME-Type" at the end of the response.
I tried the same using HttpGet with no result.
The weird thing is everything is ok when I execute the same request via Wifi.
Also I can download the file from the brower on mobile data, but not for the code. Also I've tested on Lenovo with Android 4.4.2 via mobile data and is also worked.
I noticed I'm getting Content-Type: application/vnd.wap.wmlc (logged ucon.getResponseCode()) when connected via mobile data and nothing set as content type when via WiFi.
Any ideas? :/

Here's my working code for file downloading. You can have a look to check if you're missing something.
public class ImageDownloaderAsyncTask extends
AsyncTask<Void, Integer, Integer> {
private static File f;
protected void doInBackground() throws IOException {
File dir = new File(Constants.FILE_PATH);
if (!dir.exists()) dir.mkdir();
f = new File(Constants.FILE_PATH + Constants.FILE_NAME);
if (f != null && !f.exists()) {
f.createNewFile();
}
try {
URL url = new URL(fileUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
String data1 = f.getPath();
FileOutputStream stream = new FileOutputStream(data1);
byte data[] = new byte[4096];
int count;
while ((count = input.read(data)) != -1) {
// allow canceling with back button
if (isCancelled()) {
input.close();
}
stream.write(data, 0, count);
}
stream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
protected Integer doInBackground(Void... params) {
try {
doInBackground();
} catch (IOException e) {
e.printStackTrace();
}
return 1;
}
protected void onPostExecute(Integer result) {}
}

Android: simplest url download without progress bar

I have tried to implement over 10-15 different download mechanisms for android java, I have not been able to succeed at all.
I don't care about progress bars or background processes.
I just want one functional download code in fewest lines possible
and I want it to download a binary file (foreground) to the directory in the device wherever it can be accessed as
File pf = new File("filename");
if (pf.exists()) { ... }

Try this (modified from here):
try {
URL url = new URL("http://url.com");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
//THIS IS WHERE YOU GET THE DIRECTORY TO SAVE TO
File SDCardRoot = Environment.getExternalStorageDirectory();
//THIS IS WHERE YOU WILL SET THE FILE NAME
File file = new File(SDCardRoot,"somefile.txt");
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
//create a buffer...
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
fileOutput.write(buffer, 0, bufferLength);
}
fileOutput.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
You may also need to add permissions to access the phone directory:
<manifest ...>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
</manifest>
For information on accessing certain folders on the internal directory, see the android developer page: http://developer.android.com/training/basics/data-storage/files.html#WriteInternalStorage
In fact, the solution on that page is also fairly short:
String filename = "myfile";
String string = "Hello world!";
FileOutputStream outputStream;
try {
outputStream = openFileOutput(filename, Context.MODE_PRIVATE);
outputStream.write(string.getBytes());
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
}

How to download and stock a jar file into internal storage?

I am trying to download a jar file from my server and put it into the AVD internal memory but it's not working. I tried this code in Java and it's working perfectly.
try
{
URL url = new URL(host);
URLConnection connection = url.openConnection();
int fileLength = connection.getContentLength();
if (fileLength == -1)
{
return;
}
input = connection.getInputStream();
String fileName = url.getFile().substring(url.getFile().lastIndexOf('/') + 1);
writeFile = new FileOutputStream(fileName);
byte[] buffer = new byte[1024];
int read;
while ((read = input.read(buffer)) > 0)
writeFile.write(buffer, 0, read);
writeFile.flush();
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{
try
{
writeFile.close();
input.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
I add the following permission into my manifest.xml
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />
But on connection.getContentLength();, I got a NullPointerException return
I tried with HttpURLConnection and JarURLConnection, add a connection.connect() just after openConnection(), using DownloadManager but it can only download into external storage.
Maybe with HttpClient ? AndroidHttpClient ? But Android support recommend using HttpURLConnection for applications targeted at Gingerbread and higher.

There's a cumbersome but straightforward approach:
1. Use DownloadManager to get a JAR you need (store it in external storage);
2. Move that JAR from external storage to internal one.

Downloading an image in android

I have make an application in which I require to download an image from a given link . Its showing no errors an no error messages in logcat. Following is my code
public Drawable getImage(String ImagePath,String fileName) {
Log.v("download", "image downloading from net");
boolean bin = getBinaryWebFile(ImagePath,fileName);
Drawable draw = Drawable.createFromPath(SavePath+fileName); //..........(1)
return draw;
}//getImage ends here*/
private boolean getBinaryWebFile(String inURL, String filename) {
File file = new File(SavePath,filename);
try {
URL url = new URL(inURL);
HttpURLConnection con = (HttpURLConnection)url.openConnection();
con.setRequestMethod("GET");
con.setDoOutput(true);
con.connect();
InputStream is = con.getInputStream();
FileOutputStream fos = new FileOutputStream(file);
BufferedOutputStream bout = new BufferedOutputStream(fos,1024);
byte[] data =new byte[1024];
int x = 0;
while((x=is.read(data,0,1024))>=0){
bout.write(data,0,x);
}
fos.flush();
bout.flush();
fos.close();
bout.close();
is.close();
return true;
} catch (MalformedURLException e) {
Log.d("PowerSaver","getBinaryWebFile->MalformedURLException: "+e.getMessage());
//e.printStackTrace();
} catch (IOException e) {
Log.d("PowerSaver","getBinaryWebFile->I/O exception: "+e.getMessage());
}
return false;
}//getbinarywebfile ends here
On debugging everything is running fine and at last I am getting draw as null (commented as 1) . I have even written the following permmission in manifest .
<uses-permission
android:name = "android.permission.INTERNET"/>
<uses-permission
android:name = "android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission
android:name = "android.permission.ACCESS_WIFI_STATE" />
<uses-permission
android:name = "android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission
android:name = "android.permission.READ_PHONE_STATE"/>
still getting null in draw which is referenced as comment 1.

This code works for me:
private static long DownloadFromUrl(Context context, URL fileUrl,
String fileName) throws Exception { // this is the downloader method
try {
URL myFileUrl = null;
myFileUrl = fileUrl;
// *** Internet connection
HttpURLConnection conn = (HttpURLConnection) myFileUrl
.openConnection();
conn.setDoInput(true);
conn.connect();
// int length = conn.getContentLength();
// int[] bitmapData =new int[length];
// byte[] bitmapData2 =new byte[length];
InputStream is = conn.getInputStream();
// decodificar la imagen de internet en bmImg
Bitmap bmImg = BitmapFactory.decodeStream(is);
// ***Save in the the SD
FileOutputStream out = new FileOutputStream(
<path + filename>);
byte[] buffer = new byte[1024];
int len;
while ((len = is.read(buffer)) > 0) {
out.write(buffer, 0, len);
tam += len;
}
is.close();
// Save using the selected format and quality
bmImg.compress(Bitmap.CompressFormat.PNG,
<quality>, out);
out.flush();
out.close();
// tam=bmImg.getByteCount();
bmImg.recycle();
return tam;
} catch (IOException e) {
// showErrorMessage(context, "Error downloading");
e.printStackTrace();
return 0;
}
}

Are you running your app inside the emulator? Make sure it has a proper internet connection. Sometimes the emulator can loose internet connectivtiy, especially when you're changing networks without restarting the emulator.