gradle
dependencies {
implementation 'androidx.lifecycle:lifecycle-extensions:2.4.0'
implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.4.0'
}
public class MyViewModel extends ViewModel {
private MutableLiveData<String> data;
public LiveData<String> getData() {
if (data == null) {
data = new MutableLiveData<>();
}
return data;
}
public void updateData(String newData) {
data.setValue(newData);
}
}
public class MyActivity extends AppCompatActivity {
private MyViewModel viewModel;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
viewModel = new ViewModelProvider(this).get(MyViewModel.class);
viewModel.getData().observe(this, new Observer<String>() {
@Override
public void onChanged(String newData) {
}
});
}
}
