cribetti

class MyFragment : Fragment() {
    private lateinit var arg: String
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        arguments?.getString(ARG) ?: ""
    }
    companion object {
        fun newInstance(arg: String) =
            MyFragment().apply {
                arguments = Bundle().apply {

cribetti

@NonNull
public static Fragment instantiate(@NonNull Context context, @NonNull String fname, @Nullable Bundle args) {
        try {
            ...
            Fragment f = clazz.getConstructor().newInstance();
            if (args != null) {
                args.setClassLoader(...);
                f.setArguments(args);
            }
            return f;

cribetti

class MyActivity() : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        ...
        val fragment = MyFragment.newInstance("my argument")
        supportFragmentManager.beginTransaction()
            .replace(R.id.fragment_layout, fragment)
            .commitNow()
        ...

cribetti

class MyActivity() : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        supportFragmentManager.fragmentFactory = FragmentFactoryImpl()        
        super.onCreate(savedInstanceState)
        ...
        val fragment = supportFragmentManager.fragmentFactory.instantiate(classLoader,    MyFragment::class.java.name)
        supportFragmentManager.beginTransaction()
            .replace(R.id.fragment_layout, fragment)
            .commitNow()
        ...

cribetti

@NonNull
public Fragment instantiate(@NonNull ClassLoader classLoader, @NonNull String className) {
    try {
        ...
        return cls.getConstructor().newInstance();
    } catch (java.lang.InstantiationException e) {
    ...

cribetti

class FragmentFactoryImpl: FragmentFactory() {
    val arg = "my argument"
    override fun instantiate(classLoader: ClassLoader, className: String): Fragment {
        return when (className) {
            MyFragment::class.java.name -> MyFragment(arg)
            else -> super.instantiate(classLoader, className)
        }
    }
}

cribetti

class FragmentFactoryImpl(private val arg: String): FragmentFactory() {
    override fun instantiate(classLoader: ClassLoader, className: String): Fragment {
        return when (className) {
            MyFragment::class.java.name -> MyFragment(arg)
            MyFragment2::class.java.name -> {
                MyFragment2().apply {
                    arguments = Bundle().apply {
                        putString("key", arg)
                    }
                }

cribetti

@Deprecated
@NonNull
public static Fragment instantiate(@NonNull Context context, @NonNull String fname, @Nullable Bundle args) {