From ae77fb31ddea9098f8f4d565b3a418207169d209 Mon Sep 17 00:00:00 2001
From: Yuval Peress <yuval.peress@gmail.com>
Date: Sun, 11 Jun 2017 08:10:53 -0400
Subject: [PATCH] Add check for isStarted to avoid multiple start/stop calls.

---
 .../java/com/flurgle/camerakit/CameraView.java  | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/camerakit/src/main/java/com/flurgle/camerakit/CameraView.java b/camerakit/src/main/java/com/flurgle/camerakit/CameraView.java
index d60ea73f..cc3b530e 100644
--- a/camerakit/src/main/java/com/flurgle/camerakit/CameraView.java
+++ b/camerakit/src/main/java/com/flurgle/camerakit/CameraView.java
@@ -81,6 +81,8 @@ public class CameraView extends FrameLayout {
 
     private PreviewImpl mPreviewImpl;
 
+    private boolean mIsStarted;
+
     public CameraView(@NonNull Context context) {
         super(context, null);
         init(context, null);
@@ -121,6 +123,7 @@ public class CameraView extends FrameLayout {
         mPreviewImpl = new TextureViewPreview(context, this);
         mCameraImpl = new Camera1(mCameraListener, mPreviewImpl);
 
+        mIsStarted = false;
         setFacing(mFacing);
         setFlash(mFlash);
         setFocus(mFocus);
@@ -202,7 +205,16 @@ public class CameraView extends FrameLayout {
         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
     }
 
+    public boolean isStarted() {
+        return mIsStarted;
+    }
+
     public void start() {
+        if (mIsStarted) {
+            // Already started, do nothing.
+            return;
+        }
+        mIsStarted = true;
         int cameraCheck = ContextCompat.checkSelfPermission(getContext(), Manifest.permission.CAMERA);
         int audioCheck = ContextCompat.checkSelfPermission(getContext(), Manifest.permission.RECORD_AUDIO);
 
@@ -238,6 +250,11 @@ public class CameraView extends FrameLayout {
     }
 
     public void stop() {
+        if (!mIsStarted) {
+            // Already stopped, do nothing.
+            return;
+        }
+        mIsStarted = false;
         mCameraImpl.stop();
     }