FileProvider.getUriForFile returns NullPointerException

First, this:

android:authorities="${applicationId}.fileprovider"

does not match this:

private static final String AUTHORITY = "org.broadinstitute.jsnap.provider";

Use the same algorithm in both places. So, replace the second line with:

private static final String AUTHORITY = BuildConfig.APPLICATION_ID+".fileprovider";

That will get you past the NullPointerException.

Second, this:

File photo = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), FILENAME);

does not match this:

<external-path name="jsnap_images" path="Android/data/org.broadinstitute.jsnap/files/Pictures" />

Since I don't know which of those is what you really want, I cannot suggest a fix.

I know this is a pretty old question but this answer is for future viewers. So I've encountered a similar problem and after researching, I've found an alternative to this approach.

Your Intent here for eg: To view your image from your path

 val intent = Intent()
 intent.setAction(Intent.ACTION_VIEW)
 val file = File(currentUri)
 intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
 val contentURI = getContentUri(context!!, file.absolutePath)
 intent.setDataAndType(contentURI,"image/*")
 startActivity(intent)

Main Function below

private fun getContentUri(context:Context, absPath:String):Uri? {
        val cursor = context.getContentResolver().query(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
            arrayOf<String>(MediaStore.Images.Media._ID),
            MediaStore.Images.Media.DATA + "=? ",
            arrayOf<String>(absPath), null)
        if (cursor != null && cursor.moveToFirst())
        {
            val id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID))
            return Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, Integer.toString(id))
        }
        else if (!absPath.isEmpty())
        {
            val values = ContentValues()
            values.put(MediaStore.Images.Media.DATA, absPath)
            return context.getContentResolver().insert(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
        }
        else
        {
            return null
        }
    }