Use ripple backgrounds for widget rows (Android 5+)

app/src/main/java/org/tasks/widget/ScrollableViewsFactory.java

@@ -1,6 +1,7 @@
 package org.tasks.widget;
 
 import static androidx.core.content.ContextCompat.getColor;
+import static com.todoroo.andlib.utility.AndroidUtilities.atLeastLollipop;
 
 import android.appwidget.AppWidgetManager;
 import android.content.Context;
@@ -188,6 +189,13 @@ class ScrollableViewsFactory implements RemoteViewsService.RemoteViewsFactory {
       editIntent.putExtra(WidgetClickActivity.EXTRA_TASK, task);
       row.setOnClickFillInIntent(R.id.widget_row, editIntent);
 
+      int theme = widgetPreferences.getThemeIndex();
+      if (atLeastLollipop()) {
+        row.setInt(
+            R.id.widget_row,
+            "setBackgroundResource",
+            theme == 0 ? R.drawable.widget_ripple_light : R.drawable.widget_ripple_dark);
+      }
       int horizontalPadding = (int) context.getResources().getDimension(R.dimen.widget_padding);
       int verticalPadding = widgetPreferences.getWidgetSpacing();
       int textBottomPadding =
@@ -210,7 +218,7 @@ class ScrollableViewsFactory implements RemoteViewsService.RemoteViewsFactory {
         row.setViewPadding(R.id.widget_description, horizontalPadding, 0, horizontalPadding, textBottomPadding);
       }
 
-      int dividerColor = ContextCompat.getColor(context, widgetPreferences.getThemeIndex() == 0 ? R.color.black_12 : R.color.white_12);
+      int dividerColor = ContextCompat.getColor(context, theme == 0 ? R.color.black_12 : R.color.white_12);
       row.setImageViewBitmap(R.id.divider, getSolidBackground(dividerColor));
 
       row.setInt(

app/src/main/java/org/tasks/widget/TasksWidget.java

@@ -76,7 +76,6 @@ public class TasksWidget extends InjectingAppWidgetProvider {
     ThemeColor color = new ThemeColor(context, widgetPreferences.getColor());
     RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.scrollable_widget);
     remoteViews.setInt(R.id.widget, "setLayoutDirection", locale.getDirectionality());
-    int rowSpacing = widgetPreferences.getWidgetSpacing();
     if (widgetPreferences.showHeader()) {
       remoteViews.setViewVisibility(R.id.widget_header, View.VISIBLE);
       remoteViews.setViewVisibility(

app/src/main/res/drawable-v21/widget_ripple_dark.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ripple android:color="@color/ripple_material_dark"
+  xmlns:android="http://schemas.android.com/apk/res/android">
+  <item android:id="@android:id/mask"
+    android:drawable="@android:color/white" />
+</ripple>

app/src/main/res/drawable-v21/widget_ripple_light.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ripple android:color="@color/ripple_material_light"
+  xmlns:android="http://schemas.android.com/apk/res/android">
+  <item android:id="@android:id/mask">
+    <color android:color="@android:color/white" />
+  </item>
+</ripple>

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

@@ -90,6 +90,7 @@
       android:id="@+id/list_view"
       android:layout_width="match_parent"
       android:layout_height="fill_parent"
+      android:listSelector="@android:color/transparent"
       android:divider="@null"
       android:dividerHeight="0dp"/>