ch03_android_sample_for_basic
TheinitInstancemethodletstheinternalinstancebeinitializedonlyonceandthisisdoneintheMyApplicationclassaswesawearlier.ThegetInstancemethodallowstoaccesstheinstancefromeverypartofourapplicationandtheMySingletonconstructoriskeptprivatebecausewedon’twanttoallowthecreationofmultipleins
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