问题
i have two lists called with retrofit 2 in the same fragment both list are of different objects and the response is working ok
Each object has a field (importe (represents money)) that i have to sum (method calculateTotal, that sum the objects of a list), so here is the problem: how can i sum the total of list1 + total of list2?? i need to show in textView the total sum of the two list:
Total.setText(totalAtenciones+totalNotas)
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_rendicion, container, false);
...
...
//here is the button that executes the two requests
imbBuscar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
getAtenciones();
getNotas();
System.out.println("total aten:"+totalAtenciones+" total Notas::"+totalNotas);
calcularTotalFinal();
}
});
return rootView;
}
private void getAtenciones() {
Call<List<Atencion>> call= api.obtenerAtenciones(293,desde.getText().toString());
call.enqueue(new Callback<List<Atencion>>() {
@Override
public void onResponse(Call<List<Atencion>> call, Response<List<Atencion>> response) {
System.out.println("estamos aquiiii "+response.body());
List<Atencion> atenciones= response.body();
layoutManager= new LinearLayoutManager(getActivity());
RecyclerView recycler= (RecyclerView)rootView.findViewById(R.id.rvRendicion);
recycler.setLayoutManager(layoutManager);
RvRendicionAdapter rvAdapter= new RvRendicionAdapter(atenciones);
recycler.setAdapter(rvAdapter);
calcularTotalAtenciones(atenciones);
}
@Override
public void onFailure(Call<List<Atencion>> call, Throwable t) {
System.out.println("FALLOOOOO: "+t.getMessage());
}
});
}
private void getNotas() {
Call<List<Nota>> notacall= api.obtenerNotas(293,desde.getText().toString());
notacall.enqueue(new Callback<List<Nota>>() {
@Override
public void onResponse(Call<List<Nota>> call, Response<List<Nota>> response) {
System.out.println("lista de notasssss "+response.body());
notas= response.body();
notasAdapter= new ListaAdaptadaNotas(getActivity(),notas);
listaNotas.setAdapter(notasAdapter);
calcularTotalNotas(notas);
}
@Override
public void onFailure(Call<List<Nota>> call, Throwable t) {
}
});
}
private void calcularTotalNotas(List<Nota> notas){
double total=0.0;
for (Nota nota: notas
) {
if(nota.getImporte()==null){
total=total+0.0;
}
else{ total= total+nota.getImporte();}
}
System.out.println("total notas----"+total);//here it shows the correct sum
totalNotas=total;
}
private void calcularTotalAtenciones(List<Atencion> atenciones){
double total=0.0;
for (Atencion at: atenciones
) {
if(at.getImporte()==null){
total=total+0.0;
}
else{ total= total+at.getImporte();}
}
System.out.println("total atenciones:----"+total);//here it shows the correct sum
totalNotas=total;
}
//and this is the code that sum both totals
private void calcularTotalFinal(){
double total = totalAtenciones+totalNotas;//but the result is 0.0 (i lose the values)
txtTotal.setText("Total diario = $"+total);
}
i use two variables double to save the parcial sum, totalAtenciones and totalNotas, but in the function calcularTotalFinal() both have 0.0 as value. So how can i sum the two total and show the result in textView? thanks in advance.
回答1:
I hope nota.getImporte() is a value which your getting inn your object
Change your logic like this
for (Nota nota: notas) {
if(nota!=null && nota.getImporte() != null){
total= total+nota.getImporte();
}
}
Same to calcularTotalAtenciones also
回答2:
Because the calls are asynchronous, you are getting the values to be 0. You should compute the values after both the API calls are made.
You can have a look at RxJava2 to handle asynchronous responses elegantly
来源：https://stackoverflow.com/questions/45293911/android-how-to-sum-total-of-two-different-list-in-same-fragment-called-with-retr