Draw under navbar in Android 9+

app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseActivity.kt

@@ -10,6 +10,7 @@ import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.ui.security.SecureActivityDelegate
 import eu.kanade.tachiyomi.util.system.LocaleHelper
+import eu.kanade.tachiyomi.util.view.edgeToEdge
 import uy.kohesive.injekt.injectLazy
 import eu.kanade.tachiyomi.data.preference.PreferenceValues as Values
 
@@ -23,6 +24,15 @@ abstract class BaseActivity<VB : ViewBinding> : AppCompatActivity() {
     @Suppress("LeakingThis")
     private val secureActivityDelegate = SecureActivityDelegate(this)
 
+    private val isDarkMode: Boolean by lazy {
+        val themeMode = preferences.themeMode().get()
+        (themeMode == Values.ThemeMode.dark) ||
+            (
+                themeMode == Values.ThemeMode.system &&
+                    (resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_MASK == Configuration.UI_MODE_NIGHT_YES)
+                )
+    }
+
     private val lightTheme: Int by lazy {
         when (preferences.themeLight().get()) {
             Values.LightThemeVariant.blue -> R.style.Theme_Tachiyomi_LightBlue
@@ -60,15 +70,8 @@ abstract class BaseActivity<VB : ViewBinding> : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         setTheme(
-            when (preferences.themeMode().get()) {
-                Values.ThemeMode.system -> {
-                    if (resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_MASK == Configuration.UI_MODE_NIGHT_YES) {
-                        darkTheme
-                    } else {
-                        lightTheme
-                    }
-                }
-                Values.ThemeMode.dark -> darkTheme
+            when {
+                isDarkMode -> darkTheme
                 else -> lightTheme
             }
         )
@@ -76,6 +79,10 @@ abstract class BaseActivity<VB : ViewBinding> : AppCompatActivity() {
         super.onCreate(savedInstanceState)
 
         secureActivityDelegate.onCreate()
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+            window.edgeToEdge(!isDarkMode && lightTheme != R.style.Theme_Tachiyomi_LightBlue)
+        }
     }
 
     override fun onResume() {

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

@@ -3,13 +3,16 @@ package eu.kanade.tachiyomi.ui.main
 import android.app.Activity
 import android.app.SearchManager
 import android.content.Intent
+import android.os.Build
 import android.os.Bundle
 import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
 import androidx.coordinatorlayout.widget.CoordinatorLayout
 import androidx.core.view.isVisible
+import androidx.core.view.marginBottom
 import androidx.core.view.updateLayoutParams
+import androidx.core.view.updatePadding
 import androidx.preference.PreferenceDialogController
 import com.bluelinelabs.conductor.Conductor
 import com.bluelinelabs.conductor.Controller
@@ -83,9 +86,24 @@ class MainActivity : BaseActivity<MainActivityBinding>() {
         }
 
         setContentView(binding.root)
-
         setSupportActionBar(binding.toolbar)
 
+        // Inset paddings when drawing edge-to-edge in Android 9+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+            binding.bottomNav.setOnApplyWindowInsetsListener { view, insets ->
+                view.updatePadding(bottom = insets.systemWindowInsetBottom)
+                insets
+            }
+
+            val initialFabBottomMargin = binding.rootFab.marginBottom
+            binding.rootFab.setOnApplyWindowInsetsListener { view, insets ->
+                view.updateLayoutParams<ViewGroup.MarginLayoutParams> {
+                    bottomMargin = initialFabBottomMargin + insets.systemWindowInsetBottom
+                }
+                insets
+            }
+        }
+
         tabAnimator = ViewHeightAnimator(binding.tabs, 0L)
         bottomNavAnimator = ViewHeightAnimator(binding.bottomNav)
 

app/src/main/java/eu/kanade/tachiyomi/util/view/WindowExtensions.kt

@@ -1,22 +1,42 @@
 package eu.kanade.tachiyomi.util.view
 
+import android.graphics.Color
+import android.os.Build
 import android.view.View
 import android.view.Window
+import androidx.annotation.RequiresApi
+
+@RequiresApi(Build.VERSION_CODES.P)
+fun Window.edgeToEdge(lightSystemUi: Boolean = false) {
+    decorView.systemUiVisibility = when {
+        // Handle light status and navigation bars programmatically to avoid duplicate themes
+        lightSystemUi -> {
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
+                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
+                View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR or
+                View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR
+        }
+        else -> {
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
+                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+        }
+    }
+
+    navigationBarColor = Color.TRANSPARENT
+}
 
 fun Window.showBar() {
-    val uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or
+    decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or
         View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
         View.SYSTEM_UI_FLAG_LAYOUT_STABLE
-    decorView.systemUiVisibility = uiFlags
 }
 
 fun Window.hideBar() {
-    val uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or
+    decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or
         View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
         View.SYSTEM_UI_FLAG_FULLSCREEN or
         View.SYSTEM_UI_FLAG_HIDE_NAVIGATION or
         View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
-    decorView.systemUiVisibility = uiFlags
 }
 
 fun Window.defaultBar() {