Sergio Viudes questions

• do I need a wake lock in my broadcastreceiver if I'm not starting a service or an activity?
• Play sound in Android notifications although phone silent mode is set
• Correct use of Sqlite on Android (SQLiteOpenHelper, connections, main thread, etc...) [closed]
• Get id token on Android app and verify it on backend server (How to use id token?)
• Get one letter abbreviation of week day of a date in java
• Could not get unknown property 'manifestOutputDirectory'
• AlarmManager not working in several devices

Sergio Viudes answers