RepositoryImplementationExample

• Implementation

implementation"androidx.lifecycle:lifecycle-viewmodel:2.2.0"

• Interface

publicinterfaceDummyRepository {
LiveData<String> getStringRepository();
}

• Repository Implementation

publicclassDummyRepositoryImplimplementsDummyRepository{
publicDummyRepositoryImpl() {
}
@OverridepublicLiveData<String> getStringRepository() {
MutableLiveData<String> str = newMutableLiveData<>();
str.setValue("String From DummyRepositoryImpl");
returnstr;
}
}

• ViewModel

publicclassMainVMextendsViewModel {
DummyRepositoryImplrepository;
publicMainVM() {
repository = newDummyRepositoryImpl();
}
publicLiveData<String> getData(){
returnrepository.getStringRepository();
}
}

• MainActivity

MainVMviewModel = newViewModelProvider(this).get(MainVM.class);
viewModel.getData().observe(this, newObserver<String>() {
@OverridepublicvoidonChanged(Strings) {
Log.d(TAG, "onChanged: "+s);
}
});

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Copyright 2020 M. Fadli Zein