UPDATE:
When I delete app storage, it starts to work. I don´t understand...

When I generate a signed APK for my project and I install it to my phone, app crashes. 
**When I debug the app, it works correctly.**

I use Android Studio 3 and I disabled instant run.

Using logcat, I get the following exception:

```
2019-01-15 19:19:30.594 7317-7317/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: me.agomezgz.bng.programa, PID: 7317
java.lang.RuntimeException: Unable to start activity ComponentInfo{me.agomezgz.bng.programa/me.agomezgz.bng.programa.SplashActivity}: android.database.sqlite.SQLiteException: no such table: comentario (code 1 SQLITE_ERROR):  

```