Next button listener explanation is in Java

[LesserCure]

https://codelabs.developers.google.com/codelabs/mdc-101-kotlin/#4

After the code snippet for view.next_button.setOnClickListener, it says:

We've added the line ((NavigationHost) getActivity()).navigateTo(new ProductGridFragment(), false); to the else case of the click listener.

This sentence should be changed to quote the line from the Kotlin code instead:

We've added the line (activity as NavigationHost).navigateTo(ProductGridFragment(), false) to the else case of the click listener.

[afohrman]

This has been updated in the 101 Kotlin codelab. Thanks for pointing this out!

[AndreCarvalli]

Is there a reason why my code ain`t working:
when I include this code in the Fragment the app fails to launch... but when I comment it out the app launches

` final TextInputLayout passwordTextInput = view.findViewById(R.id.password_text_input);
final TextInputLayout passwordEditText = view.findViewById(R.id.password_edit_text);
MaterialButton nextButton = view.findViewById(R.id.next_button);

    // Snippet from "Navigate to the next Fragment" section goes here.

    nextButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (!isPasswordValid((Editable) passwordEditText.getEditText()))
            {
                passwordTextInput.setError(getString(R.string.shr_error_password));
            }
            else
            {
                passwordTextInput.setError(null);//clear the error

                ((NavigationHost)getActivity()).navigateTo(new ProductGridFragment(),false);// false removes previous screen from back stack
            }
        }
    });

    // Clear the error once more than 8 characters are typed
    passwordEditText.setOnKeyListener(new View.OnKeyListener() {
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {

            if (isPasswordValid((Editable) passwordEditText.getEditText()))
            {
                passwordTextInput.setError(null);// clear the error
            }
            return false;
        }
    });`

am i doing something wrong...

[zawawimanja]

I am surprised that there I cannot use Intent method when want to navigate.

[kdb13]

I am surprised that there I cannot use Intent method when want to navigate.

Intents are for navigating between activities. Here, we are using a single activity architecture where multiple fragments are hosted inside a single activity. And, to navigate fragments we must use FragmentManager and not Intent.