Develop Reference

Share song on WhatsApp, always ends in "failed to send" message

I'm getting an input stream from a webservice and converting it to byte array so i can create a temporary file and play it using MediaPlayer (it is a .mp3). The problem is that i want to share the song on whatsapp, but i get the "failed to send" message whenever i try.
This is how i get and play the song:
if (response.body() != null) {
byte[] bytes = new byte[0];
try {
bytes = toByteArray(response.body().byteStream());
} catch (IOException e) {
e.printStackTrace();
}
mediaPlayer.reset();
try {
File tempMp3 = File.createTempFile("tempfile", "mp3", getContext().getCacheDir());
tempMp3.deleteOnExit();
FileOutputStream fos = new FileOutputStream(tempMp3);
fos.write(mp3);
fos.close();
FileInputStream fis = new FileInputStream(tempMp3);
mediaPlayer.setDataSource(fis.getFD());
mediaPlayer.prepare();
}
catch (IOException ex) {
String s = ex.toString();
ex.printStackTrace();
}
mediaPlayer.start();
This and a few similar ways is how i have tried to share it:
String sharePath = Environment.getExternalStorageDirectory().getPath()
+ "/tempfile.mp3";
Uri uri = Uri.parse(sharePath);
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("audio/*");
share.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(share, "Share Sound File"));
The song is playing just fine and i have included the permission both for reading and writing in the external storage but i need help to share the song, be it as bytes or as file or as whatever works, please.

You will need to change from
File tempMp3 = File.createTempFile("tempfile", "mp3", getContext().getCacheDir());
to
File tempMp3 = new File(Environment.getExternalStorageDirectory() + "/"+ getString(R.string.temp_file) + getString(R.string.dot_mp3)); //<- this is "tempfile" and ".mp3"
then you can share it like this
String sharePath = tempMp3.getAbsolutePath();
Uri uri = Uri.parse(sharePath);
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("audio/*");
share.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(share, getString(R.string.share_song_file)));
The main problem was that where you were storing the file could NOT be shared with other apps, was only accessible from your own, since the getCacheDir() method is used to create cache files rather than storing data in files persistently, and is sort of private to the application (and createTempFile() generates random numbers at the end of the file's name, so you wouldn't be able to hard code the correct path like that).
Also, this solution makes use of the permissions you included (accessing external storage).

Attach inputstream to email

I have an android apk expansion file and in there are some PDF's.
In the official documentation they access the files inside the .obb via Inputstream. I am able to access the files inside the .obb via the inputstream.
Now I want to attach one of the files to an email with Intent. The E-Mail Intent works perfectly fine with files from the assets, so the problem is attaching the Inputstream.
How can I attach the PDF into the mail directly from the .obb?

Solved it!
You have to convert the Inputstream to a Temorary File, get the Uri of that file and attach it to the email Intent.
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("application/pdf");
try {
ZipResourceFile expansionFile = new ZipResourceFile("Path to .obb file");
InputStream fileStream = expansionFile.getInputStream("Path inside .obb");
String downloadordner = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString(); //used for temp storage
File tempFile = new File(downloadordner+"/"+"filename.pdf");
tempFile.deleteOnExit();
FileOutputStream out = new FileOutputStream(tempFile);
IOUtils.copy(fileStream, out);
Uri theUri = Uri.fromFile(tempFile);
i.putExtra(Intent.EXTRA_STREAM, theUri);
startActivity(Intent.createChooser(i, "PDF versenden..."));
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(preisliste.this, "Es wurde kein E-Mail Client gefunden.", Toast.LENGTH_SHORT).show();
}
catch (IOException e)
{
Log.v("Datei nicht gefunden","Main Expansion");
}

Share audio file from the res/raw folder thorugh Share Intent in Android

I'm trying to share an audio file from my res/raw folder. What I've done so far is:
Uri uri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.sound); //parse path to uri
Intent share = new Intent(Intent.ACTION_SEND); //share intent
share.setType("audio/*");
share.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(share, "Share sound to"));
When I choose to share it on GMail, for example, it says something like "Failed to attach empty file". Looks like I'm not getting the right file path, so I'm basically sharing nothing. What am I doing wrong?
Any help would be much appreciated.

Copy the audio file from the resource to external storage and then share it:
InputStream inputStream;
FileOutputStream fileOutputStream;
try {
inputStream = getResources().openRawResource(R.raw.sound);
fileOutputStream = new FileOutputStream(
new File(Environment.getExternalStorageDirectory(), "sound.mp3"));
byte[] buffer = new byte[1024];
int length;
while ((length = inputStream.read(buffer)) > 0) {
fileOutputStream.write(buffer, 0, length);
}
inputStream.close();
fileOutputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_STREAM,
Uri.parse("file://" + Environment.getExternalStorageDirectory() + "/sound.mp3" ));
intent.setType("audio/*");
startActivity(Intent.createChooser(intent, "Share sound"));
Add WRITE_EXTERNAL_STORAGE permission to AndroidManifest.xml file:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

What am I doing wrong?
Few apps handle android.resource Uri values correctly. Your choices are:
Drop the feature, or
Copy the data from the resource into a file, then use FileProvider, perhaps in conjunction with my LegacyCompatCursorWrapper, or
Use my StreamProvider, which can serve raw resources directly, or
Copy the data from the resource into a file, then use Uri.fromFile(), but this looks like it will stop working with the next version of Android, based on preliminary results from testing with the N Developer Preview

EDIT: It was causing a NullPointException. This is what was I doing:
File dest = Environment.getExternalStorageDirectory();
InputStream in = getResources().openRawResource(R.raw.sound);
try
{
OutputStream out = new FileOutputStream(new File(dest, "sound.mp3"));
byte[] buf = new byte[1024];
int len;
while ( (len = in.read(buf, 0, buf.length)) != -1){
out.write(buf, 0, len);
}
in.close();
out.close();
}catch (Exception e) {}
final Uri uri = FileProvider.getUriForFile(Soundboard.this, "myapp.folagor.miquel.folagor", dest); //NullPointerException right here!!
final Intent intent = ShareCompat.IntentBuilder.from(Soundboard.this)
.setType("audio/*")
.setSubject(getString(R.string.share_subject))
.setStream(uri)
.setChooserTitle(R.string.share_title)
.createChooserIntent()
.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET)
.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);
The code was just fine. The only problem was that on the Manifest's permisions, I had "WRITE_EXTERNAL_STORAGE" instead of "android.permissions.WRITE_EXTERNAL_STORAGE". So I was not having permision to write in the external storage, which caused a FileNotFoundException due to the lack of permision. Now it works fine!

How to read PDF file saved to internal storage of device?

I am using following code to download and read a PDF file from internal storage on device.
I am able to download the files successfully to the directory:
data/data/packagename/app_books/file.pdf
But I am unable to read the file using a PDF reader application like Adobe Reader.
Code to download file
//Creating an internal dir;
File mydir = getApplicationContext().getDir("books", Context.MODE_WORLD_READABLE);
try {
File file = new File(mydir, outputFileName);
URL downloadUrl = new URL(url);
URLConnection ucon = downloadUrl.openConnection();
ucon.connect();
InputStream is = ucon.getInputStream();
FileOutputStream fos = new FileOutputStream(file);
byte data[] = new byte[1024];
int current = 0;
while ((current = is.read(data)) != -1) {
fos.write(data, 0, current);
}
is.close();
fos.flush();
fos.close();
isFileDownloaded=true;
} catch (IOException e) {
e.printStackTrace();
isFileDownloaded = false;
System.out.println(outputFileName + " not downloaded");
}
if (isFileDownloaded)
System.out.println(outputFileName + " downloaded");
return isFileDownloaded;
Code to read the file
PackageManager packageManager = getPackageManager();
Intent testIntent = new Intent(Intent.ACTION_VIEW);
testIntent.setType("application/pdf");
List list = packageManager.queryIntentActivities(testIntent,
PackageManager.MATCH_DEFAULT_ONLY);
try {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
File fileToRead = new File(
"/data/data/com.example.filedownloader/app_books/Book.pdf");
Uri uri = Uri.fromFile(fileToRead.getAbsoluteFile());
intent.setDataAndType(uri, "application/pdf");
startActivity(intent);
} catch (Exception ex) {
Log.i(getClass().toString(), ex.toString());
Toast.makeText(MainActivity.this,
"Cannot open your selected file, try again later",
Toast.LENGTH_SHORT).show();
}
All works fine but the reader app says "File Path is not valid".

Your path is only valid for your app. Place the file in a place where other apps can 'see' it. Use GetExternalFilesDir() or getExternalStorageDirectory().

Note about files which are created inside the directory created by Context.getDir(String name, int mode) that they will only be accessible by your own application; you can only set the mode of the entire directory, not of individual files.
So you can use Context.openFileOutput(String name, int mode). I'm re-using your code for an example:
try {
// Now we use Context.MODE_WORLD_READABLE for this file
FileOutputStream fos = openFileOutput(outputFileName,
Context.MODE_WORLD_READABLE);
// Download data and store it to `fos`
// ...
You might want to take a look at this guide: Using the Internal Storage.

If you would like to keep the file app specific, you can use PdfRenderer available for Lollipop and above builds. There are great tutorials on google and youtube that work well. The method you are using is a secure way to store a PDF file that is only readable from inside the app ONLY. No outside application like Adobe PDF Reader will be able to even see the file.It took me a lot of seaching but I found a solution to my specific usage by using this site and especially youtube.

How to download PDF file from asset folder to storage by making folder
make sure you have storage permission are given like marshmallow device support etc then follow these steps
private void CopyReadAssets()
{
AssetManager assetManager = getContext().getAssets();
FileInputStream in = null;
FileOutputStream out = null;
File sdcard = Environment.getExternalStorageDirectory();
File dir = new File(Environment.getExternalStorageDirectory()+File.separator+ "A_level");
File dir2;
if (dir.exists() && dir.isDirectory()){
Log.e("tag out", ""+ dir);
}else {
dir.mkdir();
Log.e("tag out", "not exist");
}
File file = new File(dir, mTitle+".pdf");
try
{
Log.e("tag out", ""+ file);
out = new FileOutputStream(file);
in = new FileInputStream (new File(mPath));
Log.e("tag In", ""+ in);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e)
{
Log.e("tag out", ""+ out);
Log.e("tag In", ""+ in);
Log.e("tag", e.getMessage());
Log.e("tag", ""+file);
Log.i("tag",""+sdcard.getAbsolutePath() + "A_level");
}
}
private void copyFile(InputStream in, OutputStream out) throws IOException
{
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1)
{
out.write(buffer, 0, read);
}
}

Android: Correctly downloading/saving an email attachement

I have an interesting problem: My application is designed to send and open up a zip full of files, and the zip has a special extension (easier for the user). I can zip up the files I need to attach in an e-mail, and I can send them.
When I use the g-mail "view" button and select my app to open the file, it doesn't unzip them correctly. However, if I use the gmail "download" button, and then open the file through a file explorer, the file unzips correctly.
This is the code I use to download the attachment:
// get attachment
try {
attachment = getContentResolver().openInputStream(
getIntent().getData());
} catch (FileNotFoundException e) {
e.printStackTrace();
}
// Save it
try {
File root = Environment.getExternalStorageDirectory();
path = root.getPath() + "/PSattachment.psz";
savedFile = new File(path);
FileOutputStream fos = new FileOutputStream(savedFile, false);
BufferedOutputStream os = new BufferedOutputStream(fos);
byte[] buffer = new byte[1024];
int byteRead = 0;
while ((byteRead = attachment.read(buffer)) != -1) {
os.write(buffer, 0, byteRead);
}
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
Am I doing something wrong? Thanks in advance. (Also, the process of unzipping is the same in both cases [file explorer and view from email], so I'm pretty sure it's something in here. Also, the file DOES download, and is the right size. It just won't unzip).

I found the answer!!! Took a while, but at least it works now:
try {
InputStream attachment = getContentResolver()
.openInputStream(getIntent().getData());
savedFile = new File(Environment
.getExternalStorageDirectory().getAbsolutePath(),
"temp" + System.currentTimeMillis() + ".psz");
FileOutputStream f = new FileOutputStream(savedFile);
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = attachment.read(buffer)) > 0) {
f.write(buffer);
}
f.close();
} catch (Exception e) {
}
I just used this code to download the attachment and now everything works perfectly =D

Check this out please:
http://www.jondev.net/articles/Unzipping_Files_with_Android_(Programmatically)
A guide to unzip files in android, hope it helps solve your problem