Android Question

Try to send a csv file but the permission fails

I'm trying to send a file (Intent.ACTION_SEND) but when I use for example gmail, the permission fail, and gmail notify me the permission of the attached file don't permit send it.
Here is my code:

private void LoadSendFile() {

String temp = new String();
File tempFile = new File(Environment.getExternalStorageDirectory() + File.separator + "Datos" + ext);

try {
FileOutputStream fos = new FileOutputStream(tempFile);

for (ActivityMat data : matriculas) {
if (!data.getViajesConductor().isEmpty()) {
for (String date : data.getViajesConductor()) {
temp += data.getName() + ": " + date + "\n";
Log.e("Write File: ", temp);


} catch (FileNotFoundException e){
Log.e("Creando fichero: ", e.getMessage(), e);
Toast toast = Toast.makeText(MainActivity.this, "File not found ...", Toast.LENGTH_SHORT);;

} catch (IOException e) {
Log.e("Escribiendo fichero: ", e.getMessage(), e);
Toast toast = Toast.makeText(MainActivity.this, "Can not build the file ...", Toast.LENGTH_SHORT);;

Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(tempFile));

Thanks in advance!!!

(Excuse my language, I'm not English)

The code had been updated. Now I have permission, but gmail notify me that it can't send an empty file, but I know (because I write a log message when I write in the file (Datos.csv)) that I write in the file. Any idea??
Here is the log (I saw is a problem of permission):

E/Creando fichero:: /storage/emulated/0/Datos.csv: open failed: EACCES (Permission denied) /storage/emulated/0/Datos.csv: open failed: EACCES (Permission denied)
.... //here the "at" statement

Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)

Answer Source

getFilesDir() is private internal memory for your app. The email app has no acces to it.

Try another location like getExternalStorageDirectory() or getExternalFilesDir().

Moreover you need to request WRITE_EXTERNAL_STORAGE permission in manifest file.

And if compiling for Android 6 and above request at runtime permission from the user for that.

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