From 5c6d7a4eaebadb94c343ebfd5bdb07976f112af8 Mon Sep 17 00:00:00 2001
From: Mark Aron Szulyovszky <mark.szulyovszky@gmail.com>
Date: Wed, 1 Nov 2017 13:09:23 +0000
Subject: [PATCH] Fix: add checking for null to avoid exception when
 .setAdUnitId is set twice

---
 .../java/com/sbugert/rnadmob/RNAdMobInterstitialAdModule.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/android/src/main/java/com/sbugert/rnadmob/RNAdMobInterstitialAdModule.java b/android/src/main/java/com/sbugert/rnadmob/RNAdMobInterstitialAdModule.java
index e53032641..79efff12e 100644
--- a/android/src/main/java/com/sbugert/rnadmob/RNAdMobInterstitialAdModule.java
+++ b/android/src/main/java/com/sbugert/rnadmob/RNAdMobInterstitialAdModule.java
@@ -106,7 +106,9 @@ private void sendEvent(String eventName, @Nullable WritableMap params) {
 
     @ReactMethod
     public void setAdUnitID(String adUnitID) {
-        mInterstitialAd.setAdUnitId(adUnitID);
+        if (mInterstitialAd.getAdUnitId() == null) {
+            mInterstitialAd.setAdUnitId(adUnitID);
+        }
     }
 
     @ReactMethod