Use light gradient with light theme

app/src/main/java/net/nullsum/audinaut/fragments/NowPlayingFragment.java

@@ -939,7 +939,7 @@ public class NowPlayingFragment extends SubsonicFragment implements OnGestureLis
         getImageLoader().loadImage(albumArtImageView, song, true, crossfade);
         if (Util.getPreferences(context).getBoolean(Constants.PREFERENCES_KEY_BLURRED_BACKGROUND, true)) {
             albumArtBackgroundView.setVisibility(ImageView.VISIBLE);
-            nowPlayingView.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.gradient));
+            nowPlayingView.setBackgroundResource(DrawableTint.getDrawableRes(context, R.attr.gradient));
             getImageLoader().loadBlurImage(albumArtBackgroundView, song, true, crossfade);
         } else {
             albumArtBackgroundView.setVisibility(ImageView.GONE);

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

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+<item>
+    <shape>
+        <gradient
+            android:angle="270"
+            android:startColor="#00ffffff"
+            android:centerColor="#44ffffff"
+            android:endColor="#99ffffff"
+            android:type="linear"/>
+    </shape>
+</item>
+</selector>

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

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
+    <attr name="gradient" format="reference"/>
+
     <attr name="element_color" format="reference"/>
     <attr name="card_background" format="reference"/>
     <attr name="actionbar_element_color" format="reference"/>

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

@@ -14,6 +14,7 @@
         <item name="actionbarSubtitleStyle">@style/TextAppearance.AppCompat.Widget.ActionBar.Subtitle</item>
         <item name="actionbarThemeStyle">@style/ThemeOverlay.AppCompat.ActionBar</item>
         <item name="actionbarTitleStyle">@style/TextAppearance.AppCompat.Widget.ActionBar.Title</item>
+        <item name="gradient">@drawable/light_gradient</item>
         <item name="actionbar_backward">@drawable/media_backward</item>
         <item name="actionbar_element_color">@color/lightElement</item>
         <item name="actionbar_fastforward">@drawable/media_fastforward</item>
@@ -71,6 +72,7 @@
     </style>
 
     <style name="Theme.Audinaut.Dark" parent="@style/Theme.AppCompat">
+        <item name="gradient">@drawable/dark_gradient</item>
         <item name="actionModeBackground">@color/background_material_dark</item>
         <item name="actionbarBackgroundColor">@android:color/transparent</item>
         <item name="actionbarPopupStyle">@style/ThemeOverlay.AppCompat.Dark</item>