From 93514fbb1106e4b9629c44186cee5375f0317a8c Mon Sep 17 00:00:00 2001
From: devnied <mxjulien@gmail.com>
Date: Sun, 19 Jul 2020 15:08:12 +0200
Subject: [PATCH] Fix NPE with `presenter.onErasedOnce()` due to delayed call
 to onErase when user long press on erase button and rotate screen.

---
 lib/src/main/java/com/maltaisn/calcdialog/CalcDialog.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/src/main/java/com/maltaisn/calcdialog/CalcDialog.java b/lib/src/main/java/com/maltaisn/calcdialog/CalcDialog.java
index 8a78cfd..d27eee8 100644
--- a/lib/src/main/java/com/maltaisn/calcdialog/CalcDialog.java
+++ b/lib/src/main/java/com/maltaisn/calcdialog/CalcDialog.java
@@ -126,7 +126,9 @@ public Dialog onCreateDialog(final Bundle state) {
         eraseBtn.setOnEraseListener(new CalcEraseButton.EraseListener() {
             @Override
             public void onErase() {
-                presenter.onErasedOnce();
+                if (presenter != null) {
+                    presenter.onErasedOnce();
+                }
             }
 
             @Override