Replace some usages of findViewById

app/src/main/java/eu/kanade/tachiyomi/ui/category/CategoryController.kt

@@ -21,6 +21,7 @@ import eu.kanade.tachiyomi.ui.base.controller.FabController
 import eu.kanade.tachiyomi.ui.base.controller.NucleusController
 import eu.kanade.tachiyomi.util.system.toast
 import eu.kanade.tachiyomi.util.view.shrinkOnScroll
+import kotlinx.android.synthetic.main.main_activity.root_coordinator
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
 import reactivecircus.flowbinding.android.view.clicks
@@ -197,7 +198,7 @@ class CategoryController :
             R.id.action_delete -> {
                 undoHelper = UndoHelper(adapter, this)
                 undoHelper?.start(
-                    adapter.selectedPositions, activity!!.findViewById(R.id.root_coordinator),
+                    adapter.selectedPositions, activity!!.root_coordinator,
                     R.string.snack_categories_deleted, R.string.action_undo, 3000
                 )
 

app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt

@@ -48,6 +48,8 @@ import eu.kanade.tachiyomi.util.view.snack
 import eu.kanade.tachiyomi.util.view.visible
 import java.util.Date
 import java.util.concurrent.TimeUnit
+import kotlinx.android.synthetic.main.main_activity.appbar
+import kotlinx.android.synthetic.main.main_activity.tabs
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -114,8 +116,7 @@ class MainActivity : BaseActivity<MainActivityBinding>() {
             true
         }
 
-        val container: ViewGroup = findViewById(R.id.controller_container)
-
+        val container: ViewGroup = binding.controllerContainer
         router = Conductor.attachRouter(this, container, savedInstanceState)
         if (!router.hasRootController()) {
             // Set start screen
@@ -428,8 +429,8 @@ class MainActivity : BaseActivity<MainActivityBinding>() {
  * collapsing AppBarLayout.
  */
 fun View.offsetAppbarHeight(activity: Activity) {
-    val appbar: AppBarLayout = activity.findViewById(R.id.appbar)
-    val tabs: TabLayout = activity.findViewById(R.id.tabs)
+    val appbar: AppBarLayout = activity.appbar
+    val tabs: TabLayout = activity.tabs
     appbar.addOnOffsetChangedListener(
         AppBarLayout.OnOffsetChangedListener { appBarLayout, verticalOffset ->
             val maxAbsOffset = appBarLayout.measuredHeight - tabs.measuredHeight

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt

@@ -13,7 +13,6 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.view.ActionMode
-import androidx.coordinatorlayout.widget.CoordinatorLayout
 import androidx.core.graphics.drawable.DrawableCompat
 import androidx.recyclerview.widget.ConcatAdapter
 import androidx.recyclerview.widget.DividerItemDecoration
@@ -69,6 +68,7 @@ import eu.kanade.tachiyomi.util.view.gone
 import eu.kanade.tachiyomi.util.view.shrinkOnScroll
 import eu.kanade.tachiyomi.util.view.snack
 import eu.kanade.tachiyomi.util.view.visible
+import kotlinx.android.synthetic.main.main_activity.root_coordinator
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
 import reactivecircus.flowbinding.android.view.clicks
@@ -516,7 +516,7 @@ class MangaController :
     private fun toggleFavorite() {
         val isNowFavorite = presenter.toggleFavorite()
         if (activity != null && !isNowFavorite && presenter.hasDownloads()) {
-            activity!!.findViewById<CoordinatorLayout>(R.id.root_coordinator)?.snack(activity!!.getString(R.string.delete_downloads_for_manga)) {
+            activity!!.root_coordinator?.snack(activity!!.getString(R.string.delete_downloads_for_manga)) {
                 setAction(R.string.action_delete) {
                     presenter.deleteDownloads()
                 }