How to go back once to a fragment?

Question

How to go back once to a fragment?

Navigation

#1 by (1 votes)
#2 by (0 votes)

0

I have a list which when clicking on an item shows me the detail in a fragment, and I have a button that allows me to add records, both load in the same container, the problem is generated when I start to open several items already the time I open the fragment to add records.

When I go back everything works fine, but I would like to return to the last fragment stack that I have intervened, because my data overlap, I leave my code and image of how it looks.

Code

//Usado al mostrar un detallle
FragDetalle fragDetalle = new FragDetalle();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.fl_contenedor_lateral, fragDetalle);
ft.addToBackStack(null);
ft.commit();

//Usado en el botón nuevo
FragNuevo fragNuevo = new FragNuevo();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.fl_contenedor_lateral, fragNuevo);
ft.addToBackStack(null);
ft.commit();

Image

The problem is only generated if you interacted with the two fragments, so I would just like to go back to the last stack of addToBackStack() , and eliminate the rest so that it does not show me the superimposed data or in any case if there is another serious solution great.

android android-fragment

asked by Luis Rene Mas Mas 09.09.2017 в 08:38

source

2 answers

1

Add in the layouts:

android:background="?android:colorBackground"

answered by 09.09.2017 в 16:48

Distance between two JavaScript marker How to center these elements

score 0 · Accepted Answer

To be able to solve the problem, just do the following:

Old code - modified

//Usado al mostrar un detallle
FragDetalle fragDetalle = new FragDetalle();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.fl_contenedor_lateral, fragDetalle);
//Cambie: ft.addToBackStack(null);
ft.addToBackStack(fragDetalle.getClass().getName());
ft.commit();

//Usado en el botón nuevo
FragNuevo fragNuevo = new FragNuevo();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.fl_contenedor_lateral, fragNuevo);
//Cambie: ft.addToBackStack(null);
ft.addToBackStack(fragNuevo .getClass().getName());
ft.commit();

New code

//Realice una condición para que no se repita la etiqueta string que se usa en  addToBackStack 
private void abrirFragmento(Fragment nuevoFragmento) {
        Fragment contenedorFragmento = getSupportFragmentManager().findFragmentById(R.id.contenedor_fragments);

        if (contenedorFragmento == null){
            agregarFragmento(nuevoFragmento);
        } else{
            if (!contenedorFragmento.getClass().getName().equalsIgnoreCase(nuevoFragmento.getClass().getName())) {
                reemplazarFragmento(nuevoFragmento);
            }
        }
    }

private void agregarFragmento(Fragment nuevoFragmento) {
        FragmentManager fm = getSupportFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();
        ft.add(R.id.contenedor_fragments, nuevoFragmento);
        ft.commit();

    }
    private void reemplazarFragmento(Fragment nuevoFragmento) {

        FragmentManager fm = getSupportFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();
        ft.replace(R.id.contenedor_fragments, nuevoFragmento);
        ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
        ft.addToBackStack(nuevoFragmento.getClass().getName());
        ft.commit();

    }

//Uso

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
   if (savedInstanceState == null){
     abrirFragmento(fragNuevo); //Recuerda debes cargar por primera vez la función que contenga FragmentTransaction con el método add
   }

}

abrirFragmento(fragDetalle); //Fragmento que reemplazara al primero (FragmentTransaction con el método replace).

If they can improve it, it would be great.