Tweak manga info header backdrop

(cherry picked from commit cef1c4b8a15246959e4e8a6708bec3c5d9bcaea8)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoHeaderAdapter.kt

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

@@ -1,5 +1,7 @@
 package eu.kanade.tachiyomi.ui.manga.info
 
+import android.graphics.PorterDuff
+import android.os.Build
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -21,6 +23,7 @@ import eu.kanade.tachiyomi.source.online.HttpSource
 import eu.kanade.tachiyomi.source.online.all.MangaDex
 import eu.kanade.tachiyomi.ui.manga.MangaController
 import eu.kanade.tachiyomi.util.system.copyToClipboard
+import eu.kanade.tachiyomi.util.system.getResourceColor
 import exh.MERGED_SOURCE_ID
 import exh.source.getMainSource
 import exh.util.SourceTagsUtil
@@ -296,6 +299,14 @@ class MangaInfoHeaderAdapter(
                             .into(it)
                     }
             }
+
+            if (Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP) {
+                @Suppress("DEPRECATION")
+                binding.backdropOverlay.background.setColorFilter(
+                    view.context.getResourceColor(android.R.attr.colorBackground),
+                    PorterDuff.Mode.SRC_ATOP
+                )
+            }
         }
 
         /**

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

@@ -185,6 +185,7 @@ class MangaInfoItemAdapter(
 
             // backgroundTint attribute doesn't work properly on Android 5
             if (Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP) {
+                @Suppress("DEPRECATION")
                 binding.mangaInfoToggleMoreScrim.background.setColorFilter(
                     view.context.getResourceColor(android.R.attr.colorBackground),
                     PorterDuff.Mode.SRC_ATOP

app/src/main/res/drawable/manga_info_gradient.xml

@@ -4,7 +4,7 @@
 
     <gradient
         android:angle="90"
-        android:startColor="?android:attr/colorBackground"
+        android:startColor="#ffffffff"
         android:endColor="#00ffffff"/>
 
     <corners android:radius="0dp" />

app/src/main/res/layout/manga_info_header.xml

@@ -15,7 +15,7 @@
             android:id="@+id/backdrop"
             android:layout_width="0dp"
             android:layout_height="0dp"
-            android:layout_marginBottom="?attr/actionBarSize"
+            android:layout_marginBottom="44dp"
             android:alpha="0.2"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
@@ -24,10 +24,12 @@
             tools:background="@mipmap/ic_launcher" />
 
         <View
+            android:id="@+id/backdrop_overlay"
             android:layout_width="match_parent"
-            android:layout_height="88dp"
+            android:layout_height="160dp"
-            android:layout_marginBottom="?attr/actionBarSize"
+            android:layout_marginBottom="44dp"
             android:background="@drawable/manga_info_gradient"
+            android:backgroundTint="?android:attr/colorBackground"
             app:layout_constraintBottom_toBottomOf="parent" />
 
         <LinearLayout
@@ -36,7 +38,7 @@
             android:layout_height="wrap_content"
             android:orientation="horizontal"
             android:paddingStart="16dp"
-            android:paddingTop="64dp"
+            android:paddingTop="48dp"
             android:paddingEnd="16dp"
             android:paddingBottom="8dp"
             app:layout_constraintTop_toTopOf="parent">
@@ -129,24 +131,17 @@
 
         </LinearLayout>
 
-    </androidx.constraintlayout.widget.ConstraintLayout>
-
-    <androidx.constraintlayout.widget.ConstraintLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:paddingStart="16dp"
-        android:paddingEnd="16dp">
-
         <com.google.android.material.button.MaterialButton
             android:id="@+id/btn_favorite"
             style="@style/Theme.Widget.Button.Action"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
+            android:layout_marginStart="16dp"
             android:text="@string/add_to_library"
             app:icon="@drawable/ic_favorite_border_24dp"
             app:layout_constraintEnd_toStartOf="@+id/btn_tracking"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent" />
+            app:layout_constraintTop_toBottomOf="@+id/manga_info" />
 
         <com.google.android.material.button.MaterialButton
             android:id="@+id/btn_tracking"
@@ -158,7 +153,7 @@
             app:icon="@drawable/ic_sync_24dp"
             app:layout_constraintEnd_toStartOf="@+id/btn_webview"
             app:layout_constraintStart_toEndOf="@+id/btn_favorite"
-            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/manga_info"
             tools:visibility="visible" />
 
         <com.google.android.material.button.MaterialButton
@@ -166,12 +161,13 @@
             style="@style/Theme.Widget.Button.Action"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
+            android:layout_marginEnd="16dp"
             android:text="@string/action_web_view"
             android:visibility="gone"
             app:icon="@drawable/ic_public_24dp"
             app:layout_constraintEnd_toStartOf="@+id/btn_merge"
             app:layout_constraintStart_toEndOf="@+id/btn_tracking"
-            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/manga_info"
             tools:visibility="visible" />
 
 
@@ -185,7 +181,7 @@
             app:icon="@drawable/eh_ic_find_replace_white_24dp"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toEndOf="@+id/btn_webview"
-            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/manga_info"
             tools:visibility="visible" />
 
     </androidx.constraintlayout.widget.ConstraintLayout>