Creazione di due fragments mediante xml.

Esercizio di creazione di due fragments messi in un'Activity per mezzo del codice xml.

Creo i fragments: una classe Java e un file XML.

Frammento.java:

public class Frammento extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        View v=inflater.inflate(R.layout.frammento,container,false);
        return v;
    }
}

frammento.xml:

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

    <Button
        android:text="Button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:id="@+id/button" />
</RelativeLayout> 

---

Frammento2.java:

public class Frammento2 extends Fragment{

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        View v=inflater.inflate(R.layout.frammento2,container, false);
        return v;
    }
}

frammento2.xml:

<?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"
    android:background="#FFFFAA">

    <TextView
        android:text="Questo è il frammento 2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textView" />
</LinearLayout> 

---

MainActivity.java:

public class MainActivity extends AppCompatActivity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }


}

activity_main.xml:

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

    <fragment android:name="com.antonello.laboratorionuovo2.Frammento"
        android:layout_height="match_parent"
        android:layout_width="0dp"
        android:id="@+id/frammento"
        android:layout_weight="1"/>

    <fragment android:name="com.antonello.laboratorionuovo2.Frammento2"
        android:layout_height="match_parent"
        android:layout_width="0dp"
        android:id="@+id/frammento2"
        android:layout_weight="1"/>

</LinearLayout> 

E così funziona perfettamente.