KnowIT questions

KnowIT answers

• Can not perform this action after onSaveInstanceState when Dialog fragment is dismissed
• Retrofit 2 synchronous call error handling for 4xx Errors
• Android Datepicker Fragment - How to do something when the user sets a date?
• How to build a release test apk for Android with Gradle?
• Android, How to read QR code in my application?
• As ViewModelProviders.of() is deprecated, how should I create object of ViewModel?