RepositoryImplementationExample

• Implementation

implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0"
implementation "androidx.activity:activity-ktx:1.1.0"

• Interface

interfaceDummyRepository {
val stringRepository:LiveData<String>
}

• Repository Implementation

classDummyRepositoryImpl : DummyRepository {
overrideval stringRepository:LiveData<String>
get() {
val str =MutableLiveData<String>()
str.value ="String From DummyRepositoryImpl"return str
}
}

• ViewModel

classMainVM : ViewModel() {
var repository:DummyRepositoryImpl=DummyRepositoryImpl()
val data:LiveData<String>
get() = repository.stringRepository
}

• MainActivity

privateval model:MainVM by viewModels()
model.data.observe(this, object:Observer<String>{
overridefunonChanged(s:String?) {
Log.d(TAG, "onChanged: $s")
}
})

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Copyright 2020 M. Fadli Zein