Custom toolbar

 Create toolbar.xml

<androidx.appcompat.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimary"
    android:minHeight="?attr/actionBarSize"
    android:theme="?attr/actionBarTheme"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

 Create toolbar_menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item android:id="@+id/love"
        android:title="fav"
        android:icon="@drawable/ic_favourite"
        app:showAsAction="always"/>

    <item android:id="@+id/delete1"
        android:title="delete"
        app:showAsAction="ifRoom"
        android:icon="@drawable/ic_delete"/>

    <item android:id="@+id/delete2"
        android:title="delete"
        app:showAsAction="collapseActionView"
        android:icon="@drawable/ic_delete"/>

</menu>

activity_main.xml

<include
    layout="@layout/toolbar" />

MainActivity.java

toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar); 
    getSupportActionBar().setDisplayHomeAsUpEnabled(true); // for back arrow button
    getSupportActionBar().setTitle("Nawlesh"); // for title

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.toolbar_menu,menu);
    return true;
}