优化

app/src/main/java/io/legado/app/lib/theme/TintHelper.kt

@@ -67,9 +67,10 @@ object TintHelper {
         when (view) {
             is Button -> {
                 sl = getDisabledColorStateList(color, disabled)
+                if (view.getBackground() is RippleDrawable) {
                     val rd = view.getBackground() as RippleDrawable
                     rd.setColor(ColorStateList.valueOf(rippleColor))
-
+                }
                 // Disabled text color state for buttons, may get overridden later by ATE tags
                 view.setTextColor(
                     getDisabledColorStateList(
@@ -164,7 +165,7 @@ object TintHelper {
                 }
                 else -> isBg = true
             }
-
+            if (!isBg && view.background is RippleDrawable) {
                 // Ripples for the above views (e.g. when you tap and hold a switch or checkbox)
                 val rd = view.background as RippleDrawable
                 @SuppressLint("PrivateResource") val unchecked = ContextCompat.getColor(
@@ -182,6 +183,7 @@ object TintHelper {
                 )
                 rd.setColor(sl)
             }
+        }
         if (isBg) {
             // Need to tint the isBackground of a view
             if (view is FloatingActionButton || view is Button) {