Refactoring

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

@@ -3005,10 +3005,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
         this.colorWarning = Helper.resolveColor(context, R.attr.colorWarning);
         this.textColorSecondary = Helper.resolveColor(context, android.R.attr.textColorSecondary);
         this.colorUnread = Helper.resolveColor(context, R.attr.colorUnread);
-
-        TypedValue tv = new TypedValue();
-        context.getTheme().resolveAttribute(R.attr.themeName, tv, true);
-        this.dark = !"light".equals(tv.string);
+        this.dark = Helper.isDarkTheme(context);
 
         this.hasWebView = Helper.hasWebView(context);
         this.contacts = Helper.hasPermission(context, Manifest.permission.READ_CONTACTS);

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

@@ -37,7 +37,6 @@ import android.graphics.RectF;
 import android.net.Uri;
 import android.os.Handler;
 import android.provider.ContactsContract;
-import android.util.TypedValue;
 
 import androidx.preference.PreferenceManager;
 
@@ -159,11 +158,8 @@ public class ContactInfo {
             }
 
         if (info.bitmap == null) {
-            TypedValue tv = new TypedValue();
-            context.getTheme().resolveAttribute(R.attr.themeName, tv, true);
             int dp = Helper.dp2pixels(context, 48);
-
-            boolean dark = !"light".equals(tv.string);
+            boolean dark = Helper.isDarkTheme(context);
             boolean identicons = prefs.getBoolean("identicons", false);
             if (identicons)
                 info.bitmap = Identicon.icon(key, dp, 5, dark);

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

@@ -36,6 +36,7 @@ import android.text.Spannable;
 import android.text.Spanned;
 import android.text.format.DateUtils;
 import android.text.format.Time;
+import android.util.TypedValue;
 import android.view.Menu;
 import android.view.View;
 import android.view.ViewGroup;
@@ -280,6 +281,12 @@ public class Helper {
         }
     }
 
+    static boolean isDarkTheme(Context context) {
+        TypedValue tv = new TypedValue();
+        context.getTheme().resolveAttribute(R.attr.themeName, tv, true);
+        return (tv.string != null && !"light".contentEquals(tv.string));
+    }
+
     // Formatting
 
     static String humanReadableByteCount(long bytes, boolean si) {