kotlin

来源： https://stackoverflow.com/questions/60926467/kotlin-android-studio-how-can-i-pass-a-variable-from-an-override-fun-to-the

来源： https://stackoverflow.com/questions/61783132/lottie-animation-in-native-android-splash-screen

来源： https://stackoverflow.com/questions/59000913/mutual-authentication-using-retrofit-android

来源： https://stackoverflow.com/questions/58812220/extract-numbers-from-a-string-kotlin

来源： https://stackoverflow.com/questions/63382855/how-to-add-embedded-and-relation-to-room-database

来源： https://stackoverflow.com/questions/60401481/gradle-6-x-kotlin-spring-boot-jar-publish-fails-workaround-in-gradle-kotlin-dsl

来源： https://stackoverflow.com/questions/60401481/gradle-6-x-kotlin-spring-boot-jar-publish-fails-workaround-in-gradle-kotlin-dsl

来源： https://stackoverflow.com/questions/59743124/deserializing-into-sealed-subclass-based-on-value-of-field

来源： https://stackoverflow.com/questions/51094918/android-progressbar-must-not-be-null-using-kotlin

问题 I am new to android and I was able to setup the firebase for my app in kotlin. If i run the app in the Nexus 5X API 27 emulator I am able to get the database but when i run the app in the actual device SAMSUNG S5 (Google play Services V 12.5.29, android V 5.0) i don't get the addValueEventListener call back. ref = FirebaseDatabase.getInstance().reference ref!!.addValueEventListener(object : ValueEventListener { override fun onCancelled(p0: DatabaseError?) { Log.d("firebase", "cancelled") }