Ensure RippleDrawable background for ReactSwitch

Author: smarki

ReactAndroid/src/main/java/com/facebook/react/views/switchview/ReactSwitch.java

@@ -10,9 +10,11 @@
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.graphics.PorterDuff;
+import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.RippleDrawable;
 import android.os.Build;
+
 import androidx.annotation.Nullable;
 import androidx.appcompat.widget.SwitchCompat;
 
@@ -48,6 +50,18 @@ public void setChecked(boolean checked) {
     }
   }
 
+  @Override
+  public void setBackgroundColor(int color) {
+    // Ensure RippleDrawable is preserved for >=21
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+      setBackground(
+          new RippleDrawable(
+              createRippleDrawableColorStateList(color), new ColorDrawable(color), null));
+    } else {
+      super.setBackgroundColor(color);
+    }
+  }
+
   void setColor(Drawable drawable, @Nullable Integer color) {
     if (color == null) {
       drawable.clearColorFilter();
@@ -63,14 +77,10 @@ public void setTrackColor(@Nullable Integer color) {
   public void setThumbColor(@Nullable Integer color) {
     setColor(super.getThumbDrawable(), color);
 
-    // Set the ripple color with thumb color if >= LOLLIPOP
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-      RippleDrawable ripple = (RippleDrawable) super.getBackground();
-      ColorStateList customColorState =
-          new ColorStateList(
-              new int[][] {new int[] {android.R.attr.state_pressed}}, new int[] {color});
-
-      ripple.setColor(customColorState);
+    // Set the ripple color if background is instance of RippleDrawable
+    if (super.getBackground() instanceof RippleDrawable && color != null) {
+      ColorStateList customColorState = createRippleDrawableColorStateList(color);
+      ((RippleDrawable) super.getBackground()).setColor(customColorState);
     }
   }
 
@@ -113,4 +123,9 @@ private void setTrackColor(boolean checked) {
       setTrackColor(currentTrackColor);
     }
   }
+
+  private ColorStateList createRippleDrawableColorStateList(@Nullable Integer color) {
+    return new ColorStateList(
+        new int[][] {new int[] {android.R.attr.state_pressed}}, new int[] {color});
+  }
 }