public class MyActivity extends AppCompatActivity {
private MyViewModel myViewModel;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
myViewModel = new ViewModelProvider(this).get(MyViewModel.class);
myViewModel.getData().observe(this, new Observer<String>() {
@Override
public void onChanged(String data) {
}
});
}
}
public class MyViewModel extends ViewModel {
private MutableLiveData<String> data = new MutableLiveData<>();
public LiveData<String> getData() {
return data;
}
public void updateData(String newData) {
data.setValue(newData);
}
}
public class MyActivity extends AppCompatActivity {
private MyViewModel myViewModel;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
myViewModel = new ViewModelProvider(this).get(MyViewModel.class);
myViewModel.getData().observe(this, new Observer<String>() {
@Override
public void onChanged(String data) {
}
});
if (savedInstanceState == null) {
myViewModel.initData();
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
myViewModel.saveData(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
myViewModel.restoreData(savedInstanceState);
}
}
