Fix java.lang.NullPointerException at
it.feio.android.omninotes.utils.StorageManager.createExternalStoragePrivateFile(StorageManager.java:93)
Fix java.lang.NullPointerException at
it.feio.android.omninotes.db.DbHelper.<init>(DbHelper.java:98)
Should fix Caused by: java.lang.IllegalArgumentException: Unknown column
requested: _data at
it.feio.android.omninotes.utils.FileHelper.getDataColumn(FileHelper.java:114.

Maybe it was due to null uri passed as parameter
Fix java.lang.RuntimeException: An error occured while executing
doInBackground() : at
it.feio.android.omninotes.utils.SimpleDiskCache.<init>(SimpleDiskCache.java:39)
SketchActivity is now SketchFragment