From b686187af89fd259ce1230bccb0a52cc1567599b Mon Sep 17 00:00:00 2001
From: Samriddha Basu <TheDorkKnightRises@users.noreply.github.com>
Date: Fri, 12 Aug 2016 01:58:18 +0530
Subject: [PATCH] Fix possible NullPointerException

See issue #21
---
 .../edwardvanraak/materialbarcodescanner/CameraSource.java  | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/materialbarcodescanner/src/main/java/com/edwardvanraak/materialbarcodescanner/CameraSource.java b/materialbarcodescanner/src/main/java/com/edwardvanraak/materialbarcodescanner/CameraSource.java
index b2160d9..2a89626 100644
--- a/materialbarcodescanner/src/main/java/com/edwardvanraak/materialbarcodescanner/CameraSource.java
+++ b/materialbarcodescanner/src/main/java/com/edwardvanraak/materialbarcodescanner/CameraSource.java
@@ -1071,8 +1071,10 @@ private class FrameProcessingRunnable implements Runnable {
         @SuppressLint("Assert")
         void release() {
             assert (mProcessingThread.getState() == State.TERMINATED);
-            mDetector.release();
-            mDetector = null;
+            if (mDetector != null) {
+                mDetector.release();
+                mDetector = null;
+            }
         }
 
         /**