What can I use instead of addAll() method in my adapter, I'm using realm version 2.0.1 and that method is deprecated, I'm trying to get all the data from the API, save it to my database and pass it to my adapter, I'm using like this:
public void getData(int page) {
if (GlobalModel.existeConexao()) {
Call<PedidosResponse> call = ((NavigationMain) getActivity()).apiService.getPedidos(GlobalModel.getToken(), GlobalModel.geEmpresaId(), page);
call.enqueue(new Callback<PedidosResponse>() {
#Override
public void onResponse(Call<PedidosResponse> call, Response<PedidosResponse> response) {
if (response.isSuccessful()) {
for (int i = 0; i < response.body().getPedidos().size(); i++) {
Pedidos mPedido = response.body().getPedidos().get(i);
int myInt = (mPedido.isProjecao()) ? 1 : 0;
if (!mRepositorio.checkIfExists(mPedido.getId())) {
mRepositorio.addPedido(mPedido.getId(), mPedido.getCliente_id(), mPedido.getData_hora(), mPedido.getData_pedido_cliente(), mPedido.getPrevisao_entrega(), mPedido.getFrete_tipo(), myInt, mPedido.getObservacao(), mPedido.getAliquota_projecao(), mPedido.getStatus(), mPedido.getPedido_cliente());
}
}
arraypedidos = mRepositorio.findAllPedidos();
if (mPedidosAdapter == null) {
mPedidosAdapter = new PedidosAdapter(getActivity(), arraypedidos);
listpedidos.setAdapter(mPedidosAdapter);
} else {
mPedidosAdapter.setData(arraypedidos);
}
}
}
#Override
public void onFailure(Call<PedidosResponse> call, Throwable t) {
if (t.getMessage() != null) {
Log.v("pedidos", t.getMessage());
}
}
});
} else {
Toast.makeText(getActivity(), "Verifique sua conexão", Toast.LENGTH_SHORT).show();
}
}
But when I run the app I get this message:
java.lang.UnsupportedOperationException: This method is not supported by RealmResults.
That's because RealmResults is just a set of pointers that satisfy the condition defined in the query. You can't manipulate it, nor should you if you just intend to show every element in your adapter.
In fact, Realm was explicitly designed to simplify the workflow of "downloading data on a background thread and saving the data in a database", and "showing the data downloaded on a background thread automatically on the UI thread".
This is what RealmChangeListener is for.
Simply put, all of this code is unnecessary:
arraypedidos = mRepositorio.findAllPedidos();
if (mPedidosAdapter == null) {
mPedidosAdapter = new PedidosAdapter(getActivity(), arraypedidos);
listpedidos.setAdapter(mPedidosAdapter);
} else {
mPedidosAdapter.setData(arraypedidos);
}
And could be replaced with this:
public class SomeActivity extends AppCompatActivity {
PedidosAdapter pedidosAdapter;
public void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.some_view);
pedidosAdapter = new PedidosAdapter(context, mRepositorio.findAllPedidos());
// set adapter, ...
}
}
And
public class PedidosAdapter extends RealmRecyclerViewAdapter<Pedidos, PedidosViewHolder> {
public PedidosAdapter(Context context, RealmResults<Pedidos> results) {
super(context, results, true);
}
// onBindViewHolder
// onCreateViewHolder
}
For this, use RealmRecyclerViewAdapter, unless you intend to handle the RealmChangeListener manually.
Related
From my fragment I call: videoViewModel.fetchContentSections();
From my vm I call: public void fetchContentSections(){repository.getContent();}
From my repo I do this:
apiService.getContent(request).enqueue(new Callback<Content>() {
#Override
public void onResponse(Call<Content> call, Response<Content> response) {
List<Section> sections = response.body() != null ? response.body().getSections() : null;
if (sections != null && !sections.isEmpty()) {
final List<Section> sectionList = new ArrayList<>();
for (Section section : sections) {
sectionList.add(section);
}
}
}
#Override
public void onFailure(Call<Content> call, Throwable t) {
Log.d(TAG, "onFailure" + Thread.currentThread().getName());
}
});
Data is returned, but in this scenario the list is null.
If I substitute the if statement for: sectionsMutableLiveList.postValue(response.body().getSections());
...everything works fine. But I need to use a non-LiveData list so I can then write the sectionList to a file. I'm hoping to then read the list from the file and post the value to a LiveData list to my vm.
Does anyone know what I've done wrong?
I am using mvvm architecture I would like to notify view when volley post request is successful, what i could do is to instantiate ViewModel in appRepository class and then post values to a liveData, but i guess that's not a good approach as I haven't seen a similar practice. Can anyone suggest me a good approach to return my response to ui, or at least notify that post request has been successful.
From fragment/View I trigger this method
// save data to api
checkInViewModel.updateEventPersonEntity(eventPersonsEntity);
ViewModel forwards it to apprespository
public void updateEventPersonEntity(EventPersonsEntity eventPersonsEntity) {
mRepository.updateEventPersonEntity(eventPersonsEntity);
}
AppRepository.Java class
public void updateEventPersonEntity(EventPersonsEntity eventPersonsEntity) {
executor.execute(() -> {
// mDb.eventPersonsDao().update(eventPersonsEntity);
if (isNetworkAvailable(context)) {
post_updateEventPersonEntity(eventPersonsEntity);
}
});
}
private void post_updateEventPersonEntity(EventPersonsEntity eventPersonsEntity) {
Map<String, Object> params = new HashMap<>();
params.put("EventPersonId", eventPersonsEntity.getEventPersonId());
params.put("EventId", eventPersonsEntity.getEventId());
params.put("PersonId", eventPersonsEntity.getPersonId());
params.put("CashStart", parseDoubleToGerman(eventPersonsEntity.getCashStart()));
params.put("CashEnd", parseDoubleToGerman(eventPersonsEntity.getCashEnd()));
params.put("StartingTime", String.valueOf(eventPersonsEntity.getStartingTime()));
params.put("EndingTime", String.valueOf(eventPersonsEntity.getEndingTime()));
params.put("isChekcedIn", eventPersonsEntity.getIsCheckedIn());
params.put("isChekcedOut", eventPersonsEntity.getIsCheckedOut());
JSONObject objRegData = new JSONObject(params);
String eventPersonApi = APP_URL.EVENT_PERSONS_API + eventPersonsEntity.getEventPersonId();
RequestQueueSingleton.getInstance(context).objectRequest(eventPersonApi, Request.Method.PUT, this::onSuccess_updateEventPersonEntity, this::onError, objRegData);
}
private void onError(VolleyError error) {
Log.d(APP_REPOSITORY_TAG, "requestError: " + error);
}
private void onSuccess_updateEventPersonEntity(JSONObject jsonObject) {
// notify ui
}
You can do this same as you did for your success response logic in repository. Simply create new callback interface:
interface OnEventUpdatedListener{
void eventUpdated();
}
Then, update your method to look like this, passing the listener to the actual method that does the work:
public void updateEventPersonEntity(EventPersonsEntity eventPersonsEntity, OnEventUpdatedListener listener) {
mRepository.updateEventPersonEntity(eventPersonsEntity, listener);
}
Pass this inside your:
if (isNetworkAvailable(context)) {
post_updateEventPersonEntity(eventPersonsEntity, listener);
}
After that, in your onSuccess() method simply call:
private void onSuccess_updateEventPersonEntity(JSONObject jsonObject) {
listener.eventUpdated();
}
Finally, you will have the info when the update happens, in the calling site, if you call your repository like this:
updateEventPersonEntity(null, new OnEventUpdatedListener() {
#Override
public void EventUpdated() {
// Do your logic here
}
});
i tried to return list from the url that i get with retrofit. it works and i get the data but it wont return.
this is my code
public List<MovieResponse> loadCourses() {
ArrayList<MovieResponse> list = new ArrayList<>();
ApiServices apiService =
NetworkClient.getRetrofitClient().create(ApiServices.class);
Call<MovieResult> call = apiService.getMovies();
call.enqueue(new Callback<MovieResult>() {
#Override
public void onResponse(Call<MovieResult> call, Response<MovieResult> response) {
if (response.body() != null) {
ArrayList<MovieResponse> movies = new ArrayList<>();
movies = response.body().getResults();
Log.d("",""+movies);
list.addAll(movies);
Log.d("",""+list);
}
}
#Override
public void onFailure(Call<MovieResult> call, Throwable t) {
// Log error here since request failed
Log.e("error", t.toString());
}
});
return list;
}
when i print list inside onResponse it works and there are the data. but when i return it or trying to print list outside onResponse for example below ArrayList<MovieResponse> list = new ArrayList<>(); it not show the data.
please help what is actually wrong with it. i really appreciate it.
The simplest way is to define your movies list directly inside activity or fragment(in other words, a field member of the class).
It's not a good idea to return data from an asynchronous method.
Change the return type of the loadCourses method to void and instantiate the filed movies inside onResponse().
public class SomeActivity extends AppCompatActivity {
private ArrayList<MovieResponse> movies = new ArrayList<>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_some);
}
public void loadCourses() {
ApiServices apiService =
NetworkClient.getRetrofitClient().create(ApiServices.class);
Call<MovieResult> call = apiService.getMovies();
call.enqueue(new Callback<MovieResult>() {
#Override
public void onResponse(Call<MovieResult> call, Response<MovieResult> response) {
if (response.body() != null) {
movies = response.body().getResults();
...
}
}
#Override
public void onFailure(Call<MovieResult> call, Throwable t) {
...
}
});
}
}
It is because you are making asynchronous call which is being handled by a separate thread. So after call.enqueue(), the main thread directly jumps to return statement without waiting for API response, that's why you are getting empty list.
Assuming your API takes 1 sec to respond,
just for an experiment, you can try adding a sleep() for 3 sec right before your return statement, it should return all the movies.
If you must return from the method then go for retrofit synchronous call.
To make a sync call create a new thread in main thread and make call from there, it is not allowed to make network call from main thread because it blocks the thread.
I have this method
private void setNews(final GetDataCallback getDataCallback){
GetDataService service = RetrofitClientInstance.getRetrofitInstance().create(GetDataService.class);
Call<ItemsAPI> call = service.getAllItems();
call.enqueue(new Callback<ItemsAPI>() {
#Override
public void onResponse(Call<ItemsAPI> call, Response<ItemsAPI> response) {
if (response.isSuccessful()) {
Log.d(TAG, "onResponse");
items = response.body();
getDataCallback.onGetData(items.getItems());
}
else {
getDataCallback.onError();
}
}
#Override
public void onFailure(Call<ItemsAPI> call, Throwable t) {
getDataCallback.onError();
Log.d(TAG, "onFailure "+ t.getMessage());
}
});
}
where I get callball with information from API
And I need to give this info to another callball
public MutableLiveData<List<News>> getNews(){
setNews(new GetDataCallback() {
#Override
public void onGetData(List<News> newsData) {
dataSet = newsData;
Log.d(TAG, "size: "+dataSet.size());
}
#Override
public void onError() {
}
});
MutableLiveData<List<News>> data = new MutableLiveData<>();
Log.d(TAG, "size before setValue: "+dataSet.size());
data.setValue(dataSet);
return data;
}
When I check log I can see
2019-05-18 10:45:17.575 2250-2250/? D/NewsRepository: size before setValue: 0
2019-05-18 10:45:18.334 2250-2250/com.krasnov.rxjavalearning D/NewsRepository: onResponse
2019-05-18 10:45:18.334 2250-2250/com.krasnov.rxjavalearning D/NewsRepository: size: 30
From another class I call getNews() method. I need to do setNews() first, have elements in data set and after return value from getNews().
How can I do this?
Retrofit.enqueue() is asynchronous call and execute in future.
If you want to update ui from Livedata from getNews()
LiveData<Data> getNews() {
final MutableLiveData<Data> data = new MutableLiveData<>();
setNews( new MyCallback(){
Void onSuccess(Data data){
data.setValue(data); // for success live data get call back
}
void onError(){
data.setValue(null); // for error case can pass null or empty list
}
});
return data;
}
You will get update with response
I'm getting acquainted with GWTP. I tried to output a table, that would contain the JSON values, taken with a help of Piriti mappers. It's not a real project's code, it's just an attempt to understand GWTP, so this may be not the most beautiful solution (in fact, it's not one for sure). Here are the two presenters that are involved in this procedure:
The FirstPresenter (that uses ProductListPresenter, that is a widget, I'm not sure that widget should be used here, but, according to this conversation, widget may do the trick):
public class FirstPresenter extends
Presenter<FirstPresenter.MyView, FirstPresenter.MyProxy> {
public static final Object SLOT_RATE = new Object();
public static final Object SLOT_PRODUCT = new Object();
private IndirectProvider<ProductListPresenter> productListFactory;
public interface MyView extends View {
public Panel getListProductPanel();
}
#Inject ProductListPresenter productListPresenter;
#ProxyCodeSplit
#NameToken(NameTokens.first)
public interface MyProxy extends ProxyPlace<FirstPresenter> {
}
#Inject
public FirstPresenter(final EventBus eventBus, final MyView view,
final MyProxy proxy, Provider<ProductListPresenter> productListFactory) {
super(eventBus, view, proxy);
this.productListFactory = new StandardProvider<ProductListPresenter>(productListFactory);
}
#Override
protected void revealInParent() {
}
#Override
protected void onBind() {
super.onBind();
}
#Inject
PlaceManager placeManager;
#Override
protected void onReset() {
super.onReset();
setInSlot(SLOT_PRODUCT, null);
for (int i = 0; i < 2; i++) { //TODO: change hardcoded value
productListFactory.get(new AsyncCallback<ProductListPresenter>() {
#Override
public void onSuccess(ProductListPresenter result) {
addToSlot(SLOT_PRODUCT, result);
}
#Override
public void onFailure(Throwable caught) {
}
});
}
}
}
The ProductListPresenter:
public class ProductListPresenter extends
PresenterWidget<ProductListPresenter.MyView> {
#Inject ProductListPiritiJsonReader reader;
public interface MyView extends View {
public Label getNameLabel();
public Label getCompanyLabel();
public Label getSerialLabel();
public Label getPricesLabel();
}
#Inject
public ProductListPresenter(final EventBus eventBus, final MyView view) {
super(eventBus, view);
}
#Override
protected void onBind() {
super.onBind();
}
#Override
protected void onReset() {
super.onReset();
try {
RequestBuilder rb = new RequestBuilder(RequestBuilder.GET, "/jsongwtproject/products.json");
rb.setCallback(new RequestCallback() {
#Override
public void onResponseReceived(Request request, Response response) {
ProductList productList = reader.read(response.getText());
for (Product product : productList.getProductList()) {
fetchDataFromServer();
}
}
#Override
public void onError(Request request, Throwable exception) {
Window.alert("Error occurred" + exception.getMessage());
}
});
rb.send();
}
catch (RequestException e) {
Window.alert("Error occurred" + e.getMessage());
}
}
//Takes the JSON string and uses showProductListData(String jsonString) method
public void fetchDataFromServer() {
try {
RequestBuilder rb = new RequestBuilder(RequestBuilder.GET, "/jsongwtpproject/products.json");
rb.setCallback(new RequestCallback() {
#Override
public void onResponseReceived(Request request, Response response) {
showProductListData(response.getText());
}
#Override
public void onError(Request request, Throwable exception) {
Window.alert("Error occurred" + exception.getMessage());
}
});
rb.send();
}
catch (RequestException e) {
Window.alert("Error occurred" + e.getMessage());
}
}
//Uses Piriti mappers to take JSON values
private void showProductListData(String jsonString) {
ProductList productList = reader.read(jsonString);
for (Product product : productList.getProductList()) {
StringBuffer priceSb = new StringBuffer();
for (Double price : product.getPrices()) {
priceSb.append(price + ", ");
}
getView().getNameLabel().setText(product.getName());
getView().getCompanyLabel().setText(product.getCompany());
getView().getSerialLabel().setText(product.getSerialNumber());
getView().getPricesLabel().setText(priceSb.toString());
//break;
}
}
}
And the ProductListView.ui.xml:
<g:HTMLPanel>
<table border="1">
<tr>
<td><g:Label ui:field="nameLabel" /> </td>
<td><g:Label ui:field="companyLabel" /> </td>
<td><g:Label ui:field="serialLabel" /> </td>
<td><g:Label ui:field="pricesLabel" /> </td>
</tr>
</table>
</g:HTMLPanel>
Currrently there are two products in the JSON.
Here is what happens with this code: the first row with Product1 appears, then it changes to the first row that contains Product2's values, then again it contains Product1's values, then again Product2's, after that the second row with Product1 appears, then it changes to the second row that contains Product2's values, then again it contains Product1's values, then again Product2's.
So, there are two products and two rows, and in this code the values are changed twice, but in the end the table contains only Product2's values. If the break; is uncommented, Product1's values output twice in the first row, then in the second row, then the table contain only these Product1's values.
I do understand why that happens. But I haven't yet figured out how to make the correct output. It'd be great if someone could tell me how to do the correct output, or, well, provide an example (or would tell me which part, e.g. the widget usage, is terribly wrong).
The problem with your code is that you really don't have a real table in your ProductListView.ui.xml.
Of course if there were two records retrieved from the server, this part of the code is called twice:
getView().getNameLabel().setText(product.getName());
getView().getCompanyLabel().setText(product.getCompany());
getView().getSerialLabel().setText(product.getSerialNumber());
getView().getPricesLabel().setText(priceSb.toString());
the second call overwriting the value from the first call.
Points to improve your code:
You may want to read about CellTable for creating a real table view.
Do not use the PresenterWidget itself as data holder, instead create
a DTO that will be pass to the database and use this to retrieve the
data.