Day58 of #100DaysOfCode

#CodeTogether Day 58/100

Hii folks 🙌

Today I will be continuing the same pathway in which I will convert the DetailActivity to the WordListFragment.

We will start by copying the companion object to WordListFragment .

companion object {
   val LETTER = "letter"
   val SEARCH_PREFIX = "https://www.google.com/search?q="
}

Then, in the LetterAdapter , in the onClickListner() when we perform the intent, we need to update the call to putExtra() , replacing DetailActivity.LETTER with WordListFragment.LETTER .

intent.putExtra(WordListFragment.LETTER, holder.button.text.toString())

Similarly, in WordAdapter we need to update the onClickListener() where we navigate to the search results for the word, replacing DetailActivity.SEARCH_PREFIX with WordListFragment.SEARCH_PREFIX.

val queryUrl: Uri = Uri.parse("${WordListFragment.SEARCH_PREFIX}${item}")

Back in WordListFragment, we add a binding variable of type FragmentWordListBinding?.

private var _binding: FragmentWordListBinding? = null

We then create a get-only variable so that we can reference views without having to use ? .

private val binding get() = _binding!!

Then we need to inflate the layout, assigning the _binding variables and returning the root view.

override fun onCreateView(
   inflater: LayoutInflater,
   container: ViewGroup?,
   savedInstanceState: Bundle?
): View? {
   _binding = FragmentWordListBinding.inflate(inflater, container, false)
   return binding.root
}

Now we will implement onViewCreated() .

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
   val recyclerView = binding.recyclerView
   recyclerView.layoutManager = LinearLayoutManager(requireContext())
   recyclerView.adapter = WordAdapter(activity?.intent?.extras?.getString(LETTER).toString(), requireContext())

   recyclerView.addItemDecoration(
       DividerItemDecoration(context, DividerItemDecoration.VERTICAL)
   )
}

Finally, we can reset the _binding variable in onDestroyView()

override fun onDestroyView() {
   super.onDestroyView()
   _binding = null
}

With all this functionality moved into WordListFragment, we can now delete the code from DetailActivity. All that should be left is the onCreate() method.

override fun onCreate(savedInstanceState: Bundle?) {
   super.onCreate(savedInstanceState)

   val binding = ActivityDetailBinding.inflate(layoutInflater)
   setContentView(binding.root)
}

Now that we’ve successfully migrated the functionality of DetailActivity into WordListFragment, we no longer need DetailActivity. We can go ahead and delete both the DetailActivity.kt and activity_detail.xml as well as make a small change to the manifest. Finally, as DetailActivity no longer exists, remove the following from AndroidManifest.xml.

<activity
   android:name=".DetailActivity"
   android:parentActivityName=".MainActivity" />

Further, we will see next day…

That is all for Day58 ✅

Thanks for reading, See you tomorrow!