Add ripples to header buttons

app/src/main/java/org/tasks/themes/ThemeColor.java

@@ -351,6 +351,10 @@ public class ThemeColor implements Pickable {
     return hintOnPrimary;
   }
 
+  public boolean isDark() {
+    return isDark;
+  }
+
   public void apply(Toolbar toolbar) {
     toolbar.setBackgroundColor(getPrimaryColor());
     toolbar.setNavigationIcon(colorDrawable(toolbar.getNavigationIcon(), colorOnPrimary));

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

@@ -105,6 +105,8 @@ public class TasksWidget extends InjectingAppWidgetProvider {
     Filter filter = defaultFilterProvider.getFilterFromPreference(filterId);
     remoteViews.setTextViewText(R.id.widget_title, filter.listingTitle);
     remoteViews.setRemoteAdapter(R.id.list_view, rvIntent);
+    setRipple(
+        remoteViews, color, R.id.widget_button, R.id.widget_change_list, R.id.widget_reconfigure);
     remoteViews.setOnClickPendingIntent(R.id.widget_title, getOpenListIntent(context, filter, id));
     remoteViews.setOnClickPendingIntent(R.id.widget_button, getNewTaskIntent(context, filter, id));
     remoteViews.setOnClickPendingIntent(R.id.widget_change_list, getChooseListIntent(context, filter, id));
@@ -119,6 +121,16 @@ public class TasksWidget extends InjectingAppWidgetProvider {
     return remoteViews;
   }
 
+  private void setRipple(RemoteViews rv, ThemeColor color, int... views) {
+    int drawableRes =
+        color.isDark()
+            ? R.drawable.widget_ripple_circle_light
+            : R.drawable.widget_ripple_circle_dark;
+    for (int view : views) {
+      rv.setInt(view, "setBackgroundResource", drawableRes);
+    }
+  }
+
   private @ColorInt int getBackgroundColor(int themeIndex) {
     int background;
     if (themeIndex == 1) {

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

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<color android:color="@android:color/transparent"
+  xmlns:android="http://schemas.android.com/apk/res/android" />

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

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<color android:color="@android:color/transparent"
+  xmlns:android="http://schemas.android.com/apk/res/android" />

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

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<color android:color="@android:color/transparent"
+  xmlns:android="http://schemas.android.com/apk/res/android" />

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

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<color android:color="@android:color/transparent"
+  xmlns:android="http://schemas.android.com/apk/res/android" />