Refactoring

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

@@ -327,7 +327,7 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         this.debug = prefs.getBoolean("debug", false);
 
-        this.dp12 = Math.round(12 * context.getResources().getDisplayMetrics().density);
+        this.dp12 = Helper.dp2pixels(12, context);
 
         setHasStableIds(true);
     }

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

@@ -1718,7 +1718,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
         this.confirm = prefs.getBoolean("confirm", false);
         this.debug = prefs.getBoolean("debug", false);
 
-        this.dp24 = Math.round(24 * context.getResources().getDisplayMetrics().density);
+        this.dp24 = Helper.dp2pixels(24, context);
         this.colorPrimary = Helper.resolveColor(context, R.attr.colorPrimary);
         this.colorAccent = Helper.resolveColor(context, R.attr.colorAccent);
         this.textColorSecondary = Helper.resolveColor(context, android.R.attr.textColorSecondary);

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

@@ -1834,8 +1834,7 @@ public class FragmentCompose extends FragmentEx {
                 }
             }
 
-            float scale = getContext().getResources().getDisplayMetrics().density;
-            int px = Math.round(12 * scale);
+            int px = Helper.dp2pixels(12, getContext());
             Drawable d = getContext().getResources().getDrawable(R.drawable.baseline_broken_image_24, getContext().getTheme());
             d.setBounds(0, 0, px, px);
             return d;

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

@@ -497,7 +497,7 @@ public class FragmentMessages extends FragmentEx {
                 boolean inbox = (EntityFolder.ARCHIVE.equals(message.folderType) || EntityFolder.TRASH.equals(message.folderType));
 
                 View itemView = viewHolder.itemView;
-                int margin = Math.round(12 * (getContext().getResources().getDisplayMetrics().density));
+                int margin = Helper.dp2pixels(12, getContext());
 
                 if (dX > margin) {
                     // Right swipe

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

@@ -176,6 +176,11 @@ public class Helper {
         return intent;
     }
 
+    static int dp2pixels(int dp, Context context) {
+        float scale = context.getResources().getDisplayMetrics().density;
+        return Math.round(dp * scale);
+    }
+
     static int resolveColor(Context context, int attr) {
         int[] attrs = new int[]{attr};
         TypedArray a = context.getTheme().obtainStyledAttributes(attrs);

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

@@ -109,8 +109,7 @@ public class HtmlHelper {
     }
 
     static Drawable decodeImage(String source, Context context, long id, boolean show) {
-        float scale = context.getResources().getDisplayMetrics().density;
-        int px = Math.round(48 * scale);
+        int px = Helper.dp2pixels(48, context);
 
         if (TextUtils.isEmpty(source)) {
             Drawable d = context.getResources().getDrawable(R.drawable.baseline_broken_image_24, context.getTheme());