Refactoring

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -1387,7 +1387,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             if (account_color == 2 &&
                     !Objects.equals(ivBadge.getTag(), colorBackground)) {
                 ivBadge.setTag(colorBackground);
-                ((GradientDrawable) ivBadge.getDrawable().mutate()).setColor(colorBackground);
+                Helper.setColor(ivBadge.getDrawable(), colorBackground);
             }
             ivBadge.setVisibility(account_color == 2 ? View.VISIBLE : View.GONE);
 

app/src/main/java/eu/faircode/email/Helper.java

@@ -56,6 +56,10 @@ import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.Bitmap;
 import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.GradientDrawable;
+import android.graphics.drawable.ShapeDrawable;
 import android.net.Uri;
 import android.opengl.EGL14;
 import android.opengl.EGLConfig;
@@ -1958,6 +1962,16 @@ public class Helper {
         return fragment.getClass().getName() + ":result:" + getWho(fragment);
     }
 
+    static void setColor(Drawable drawable, int color) {
+        drawable = drawable.mutate();
+        if (drawable instanceof ShapeDrawable)
+            ((ShapeDrawable) drawable).getPaint().setColor(color);
+        else if (drawable instanceof GradientDrawable)
+            ((GradientDrawable) drawable).setColor(color);
+        else if (drawable instanceof ColorDrawable)
+            ((ColorDrawable) drawable).setColor(color);
+    }
+
     static void clearViews(Object instance) {
         try {
             String cname = instance.getClass().getSimpleName();