Your content must have a ListView whose id attribute is 'android.R.id.list' im trying to create a listfragment

Question

I'm new in android studio and I'm trying to create a fragment with a list and show it on a drawer class that I use to show all my fragments, I already read a lot of post but I can't find the answer I'm looking for, let me paste you my code so you can check it.

layout code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ListView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/lista"
        android:layout_gravity="center_horizontal" />
</LinearLayout>

fragment class code:

public class FragmentoPrincipalChofer extends ListFragment {
    private List<ParseObject> mViaje;
    private ListView mLista;

    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View x = inflater.inflate(R.layout.fragmento_principal_chofer, container, false);
        mLista = (ListView)x.findViewById(R.id.lista);
        String[] nombres= new String[2];
        nombres[0]="gaston";
        nombres[1]="gaston";
        ArrayAdapter<String> adaptador = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1, nombres);
        mLista.setAdapter(adaptador);

        return x;

    }

drawer class code:

public class DrawerPrincipal extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener,FragmentoPrincipalUsuario.OnFragmentInteractionListener {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_drawer_principal);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    //cargar fragment principal usuario

    FragmentoPrincipalChofer fragmento=(FragmentoPrincipalChofer) getSupportFragmentManager().findFragmentByTag("fragmento");
    if (fragmento==null){
        fragmento=new FragmentoPrincipalChofer();
        android.support.v4.app.FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        transaction.add(android.R.id.content,fragmento,"fragmento");
        transaction.commit();

    }


    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.setDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);
}

Answer 1

You're using a ListFragment so...

ListFragment has a default layout that consists of a single list view. However, if you desire, you can customize the fragment layout by returning your own view hierarchy from onCreateView(LayoutInflater, ViewGroup, Bundle). To do this, your view hierarchy must contain a ListView object with the id "@android:id/list" (or list if it's in code)

Change the ListView XML to the following

<ListView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@android:id/list"
    android:layout_gravity="center_horizontal" />

And your reference to it as such

mLista = (ListView)x.findViewById(android.R.id.list);