Singletone classes injected by dagger with synchronized methods

Question

I use singletone classes, are injected by dagger. But if synchronized methods start running, but they terminates. But if I remove synchronization from methods, they run well. If I inject sungletone classes by dagger, I shouldn't use synchronized methods?

Answer 1

Dagger and Dagger 2 singletons and scoped providers use internal double-checked synchronization. If you're writing a singleton @Provides method, it will be called exactly once in a synchronized environment, so you probably won't need to worry about it.

Unless your @Provides method does anything thread-unsafe and is expected to be called multiple times, don't worry about marking anything synchronized.