Sovet 
class LibraryFragment : Fragment() {
var expandableListView: ExpandableListView? = null
var expandableListAdapter: ExpandableListAdapter? = null
var expandableListTitle: List<String>? = null
var expandableListDetail: LinkedHashMap<String, List<Int>>? = null
private var doubleBackToExitPressedOnce = false
private var isPurchasedKey = false
lateinit var sPref: SharedPreferences
private var prefPurchaseKey = Constants.PREF_PURCHASED_KEY_PRO
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setHasOptionsMenu(true)
activity?.onBackPressedDispatcher?.addCallback(this, object : OnBackPressedCallback(true) {
override fun handleOnBackPressed() {
if (doubleBackToExitPressedOnce) {
requireActivity().finish()
return
}
doubleBackToExitPressedOnce = true
Toast.makeText(requireActivity(), getString(R.string.toast), Toast.LENGTH_SHORT).show()
Handler().postDelayed(Runnable { doubleBackToExitPressedOnce = false }, 2000)
}
})
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_library, container, false)
}
override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
inflater.inflate(R.menu.library_menu, menu)
super.onCreateOptionsMenu(menu, inflater)
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when(item.itemId){
R.id.searchArticles->{
findNavController().navigate(R.id.navigation_search_texts)
}
R.id.favoritesTexts->{
val intent = Intent(context, FavoriteTextActivity::class.java)
startActivity(intent)
}
}
return super.onOptionsItemSelected(item)
}
override fun onStart() {
super.onStart()
sPref = requireActivity().getSharedPreferences("Settings", Context.MODE_PRIVATE)
isPurchasedKey = sPref.getBoolean(prefPurchaseKey, false)
expandableListView = view?.findViewById(R.id.expandableListView) as ExpandableListView
expandableListDetail = LibraryListDataPump.getData() as LinkedHashMap<String, List<Int>>?
expandableListTitle = ArrayList(expandableListDetail!!.keys)
expandableListAdapter =
LibraryExpandableListAdapter(
activity,
expandableListTitle,
null,
isPurchasedKey
)
expandableListView!!.setAdapter(expandableListAdapter)
expandableListView!!.setOnGroupExpandListener { groupPosition ->
if (groupPosition != 6) {
openLibrary?hapter(groupPosition)
} else {
if (isPurchasedKey) {
openLibrary?hapter(groupPosition)
} else {
showKeyDialog(
"Раздел доступен только Pro версии",
"Чтобы получить доступ к разделу, купите Pro версию в настройках приложения.",
"Перейти в настройки",
"Отменить")
}
}
}
}
fun showKeyDialog(header: String, message: String, positiveButtonText:String, negativeButtonText:String){
var builder = AlertDialog.Builder(activity)
builder.setMessage(message)
builder.setTitle(header)
builder.setPositiveButton(positiveButtonText) { dialogInterface: DialogInterface, i: Int ->
dialogInterface.cancel()
val i= Intent(activity, SettingsActivity::class.java)
startActivity(i)
}
builder.setNegativeButton(negativeButtonText) { dialogInterface: DialogInterface, i: Int ->
dialogInterface.cancel()
}
builder.create().show()
}
private fun openLibrary?hapter(groupPosition: Int) {
val i = Intent(activity, SubLibraryListActivity::class.java)
val l: ArrayList<List<Int>> = ArrayList<List<Int>>(expandableListDetail!!.values)
i.putExtra("LibraryGroupID", (groupPosition + 1).toString())
i.putExtra("LibraryGroupTitle", (expandableListTitle as ArrayList<String>)[groupPosition])
i.putExtra("LibraryList", l[groupPosition] as java.util.ArrayList<Int>)
startActivity(i)
}
}if (groupPosition != 6) {
openLibrary?hapter(groupPosition)
} else {
if (isPurchasedKey) {
openLibrary?hapter(groupPosition)
} else {
showKeyDialog(
"Раздел доступен только Pro версии",
"Чтобы получить доступ к разделу, купите Pro версию в настройках приложения.",
"Перейти в настройки",
"Отменить")
}
}
if (groupPosition != 6) {
openLibrary?hapter(groupPosition)
} else {
if (isPurchasedKey) {
openLibrary?hapter(groupPosition)
} else {
showKeyDialog(
"Раздел доступен только Pro версии",
"Чтобы получить доступ к разделу, купите Pro версию в настройках приложения.",
"Перейти в настройки",
"Отменить")
}
}
groupPosition != 6 or groupPosition != 4
groupPosition != 6 or groupPosition != 4
FullTwo
groupPosition != 6 AND groupPosition != 4
Ivlev if (groupPosition != 6 && groupPosition != 4) {