From 5530c011fa5258c3533bd87a98c2a2bc344978f1 Mon Sep 17 00:00:00 2001
From: Alexander <dev.melnikov@gmail.com>
Date: Wed, 1 Apr 2020 22:18:52 +0300
Subject: [PATCH] Add ability to clear lifecycleObserver (#798)

* Added ability clear lifecycleObserver

* Added clearing reference on lifecycle
---
 .../otaliastudios/cameraview/CameraView.java  | 22 +++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java b/cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java
index 07c1d6b4..5933df05 100644
--- a/cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java
+++ b/cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java
@@ -752,12 +752,26 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
      * Sets the lifecycle owner for this view. This means you don't need
      * to call {@link #open()}, {@link #close()} or {@link #destroy()} at all.
      *
+     * If you want that lifecycle stopped controlling the state of the camera,
+     * pass null in this method.
+     *
      * @param owner the owner activity or fragment
      */
-    public void setLifecycleOwner(@NonNull LifecycleOwner owner) {
-        if (mLifecycle != null) mLifecycle.removeObserver(this);
-        mLifecycle = owner.getLifecycle();
-        mLifecycle.addObserver(this);
+    public void setLifecycleOwner(@Nullable LifecycleOwner owner) {
+        if (owner == null) {
+            clearLifecycleObserver();
+        } else {
+            clearLifecycleObserver();
+            mLifecycle = owner.getLifecycle();
+            mLifecycle.addObserver(this);
+        }
+    }
+
+    private void clearLifecycleObserver() {
+        if (mLifecycle != null) {
+            mLifecycle.removeObserver(this);
+            mLifecycle = null;
+        }
     }
 
     /**