Thanks Rob, this was hepful. Here are differences listed when we compare programming ET1 versus Smartphone

Sample that could work on smartphones (Xperia Ray) which does not work on  ET1 :
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE );
startActivityForResult(intent, CAMERA_PIC_REQUEST);

Works with ET1 :
File currentPhotoFile = GetCurrentPhotoFile();
mCurrentPhotoUri = Uri.fromFile(currentPhotoFile);

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE );
intent.putExtra(MediaStore.EXTRA_OUTPUT, mCurrentPhotoUri);
startActivityForResult(intent, CAMERA_PIC_REQUEST);

-----------------

Once result is captured, do not try retrieving the image path  using the intent. Use the path you have defined during the call ("intent.putExtra")

Sample which does not work on ET1 :
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_PIC_REQUEST) {
if (resultCode == RESULT_OK) {
try {
Uri capturedImageUri = data.getData();
new AsyncPreview(this).execute(capturedImageUri);
EnablePreview();
} catch (Exception e) {
e.printStackTrace();
}
}
else if(resultCode == RESULT_CANCELED)
            ...

Sample that works with ET1 :
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_PIC_REQUEST) {
if (resultCode == RESULT_OK)
try {
new AsyncPreview(this).execute(mCurrentPhotoUri);
EnablePreview();
} catch (Exception e) {
e.printStackTrace();
}
}
else if(resultCode == RESULT_CANCELED)
...

Two reminders for ET1  :
- Picture file is not automatically created (smartphones might use a DCIM folder as default), methods requires a destination path.
- File retrieved is not pointing to the path, the initial path should be kept in memory.

Thibaut