Use more correct detection of dark AMOLED theme

app/src/main/java/org/koitharu/kotatsu/base/ui/BaseActivity.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.base.ui
 
+import android.content.res.Configuration
 import android.os.Build
 import android.os.Bundle
 import android.view.KeyEvent
@@ -101,6 +102,12 @@ abstract class BaseActivity<B : ViewBinding> : AppCompatActivity(), OnApplyWindo
 		(findViewById<View>(R.id.toolbar) as? Toolbar)?.let(this::setSupportActionBar)
 	}
 
+	protected fun isDarkAmoledTheme(): Boolean {
+		val uiMode = resources.configuration.uiMode
+		val isNight = uiMode and Configuration.UI_MODE_NIGHT_MASK == Configuration.UI_MODE_NIGHT_YES
+		return isNight && get<AppSettings>().isAmoledTheme
+	}
+
 	override fun onSupportActionModeStarted(mode: ActionMode) {
 		super.onSupportActionModeStarted(mode)
 		val insets = ViewCompat.getRootWindowInsets(binding.root)

app/src/main/java/org/koitharu/kotatsu/main/ui/MainActivity.kt

@@ -345,7 +345,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>(),
 		binding.drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED)
 		drawerToggle.isDrawerIndicatorEnabled = false
 		// Avoiding shadows on the sides if the color is transparent, so we make the AppBarLayout white/grey/black
-		if (get<AppSettings>().isAmoledTheme && get<AppSettings>().theme == AppCompatDelegate.MODE_NIGHT_YES) {
+		if (isDarkAmoledTheme()) {
 			binding.toolbar.setBackgroundColor(Color.BLACK)
 		} else {
 			binding.appbar.setBackgroundColor(ContextCompat.getColor(this, R.color.color_surface))
@@ -365,7 +365,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>(),
 	private fun onSearchClosed() {
 		binding.drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED)
 		drawerToggle.isDrawerIndicatorEnabled = true
-		if (get<AppSettings>().isAmoledTheme) {
+		if (isDarkAmoledTheme()) {
 			binding.toolbar.setBackgroundColor(ContextCompat.getColor(this, R.color.color_background))
 		}
 		// Returning transparent color

app/src/main/res/values/colors.xml

@@ -34,6 +34,5 @@
 	<color name="grey_dark">#212121</color>
 	<color name="dim">#99000000</color>
 	<color name="shadow">#99000000</color>
-	<color name="transparent">#00FFFFFF</color>
 
 </resources>