diff --git a/README.md b/README.md
index 06f6e63..5615ee5 100644
--- a/README.md
+++ b/README.md
@@ -54,21 +54,21 @@ ZXingLite for Android 是ZXing的精简版，基于ZXing库优化扫码和生成
 <dependency>
   <groupId>com.king.zxing</groupId>
   <artifactId>zxing-lite</artifactId>
-  <version>1.1.4</version>
+  <version>1.1.5</version>
   <type>pom</type>
 </dependency>
 ```
 ### Gradle:
 ```gradle
 //AndroidX 版本
-implementation 'com.king.zxing:zxing-lite:1.1.4-androidx'
+implementation 'com.king.zxing:zxing-lite:1.1.5-androidx'
 
 //Android 版本
-implementation 'com.king.zxing:zxing-lite:1.1.4'
+implementation 'com.king.zxing:zxing-lite:1.1.5'
 ```
 ### Lvy:
 ```lvy
-<dependency org='com.king.zxing' name='zxing-lite' rev='1.1.4'>
+<dependency org='com.king.zxing' name='zxing-lite' rev='1.1.5'>
   <artifact name='$AID' ext='pom'></artifact>
 </dependency>
 ```
@@ -98,9 +98,9 @@ api 'com.google.zxing:core:3.3.3'
 布局示例
 >  可自定义布局（覆写getLayoutId方法），布局内至少要保证有SurfaceView和ViewfinderView，控件id可根据覆写CaptureActivity 的 getSurfaceViewId 和 getViewfinderViewId方法自定义
 
->  ivTorch为 v1.1.4版本新增的手电筒按钮，如果想改ID可通过CaptureActivity中的getIvTorchId自定义ID
+>  ivTorch为 v1.1.5版本新增的手电筒按钮，如果想改ID可通过CaptureActivity中的getIvTorchId自定义ID
 
->  如果是从v1.1.4以前版本升级至v1.1.4以上版本，请参考如下布局示例（新增ivTorch），也可忽略内置手电筒功能可直接将CaptureActivity中的getIvTorchId方法返回0
+>  如果是从v1.1.5以前版本升级至v1.1.5以上版本，请参考如下布局示例（新增ivTorch），也可忽略内置手电筒功能可直接将CaptureActivity中的getIvTorchId方法返回0
 
 ```Xml
     <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
@@ -165,6 +165,9 @@ api 'com.google.zxing:core:3.3.3'
 
 ## 版本记录
 
+#### v1.1.5：2019-12-16
+*  优化Camera初始化相关策略，减少出现卡顿的可能性
+
 #### v1.1.4：2019-11-18
 *  内置手电筒按钮,当光线太暗时，自动显示手电筒 (fix#58)
 *  生成二维码时Logo支持自定义大小 (fix#62)
@@ -238,3 +241,5 @@ api 'com.google.zxing:core:3.3.3'
        <img src="https://jenly1314.github.io/image/jenly666.png">
        <img src="https://jenly1314.github.io/image/qqgourp.png">
    </div>
+
+
diff --git a/app/release/app-release.apk b/app/release/app-release.apk
index c551c8f..254e74c 100644
Binary files a/app/release/app-release.apk and b/app/release/app-release.apk differ
diff --git a/app/release/output.json b/app/release/output.json
index a7d5c3a..4230fcc 100644
--- a/app/release/output.json
+++ b/app/release/output.json
@@ -1 +1 @@
-[{"outputType":{"type":"APK"},"apkInfo":{"type":"MAIN","splits":[],"versionCode":16,"versionName":"1.1.4-androidx","enabled":true,"outputFile":"app-release.apk","fullName":"release","baseName":"release"},"path":"app-release.apk","properties":{}}]
\ No newline at end of file
+[{"outputType":{"type":"APK"},"apkInfo":{"type":"MAIN","splits":[],"versionCode":18,"versionName":"1.1.5-androidx","enabled":true,"outputFile":"app-release.apk","fullName":"release","baseName":"release"},"path":"app-release.apk","properties":{}}]
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index de8b4bd..7cc0f0d 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -5,6 +5,8 @@
 
     <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
 
     <application
         android:allowBackup="true"
diff --git a/app/src/main/java/com/king/zxing/app/CustomCaptureActivity.java b/app/src/main/java/com/king/zxing/app/CustomCaptureActivity.java
index 4a0819b..6708866 100644
--- a/app/src/main/java/com/king/zxing/app/CustomCaptureActivity.java
+++ b/app/src/main/java/com/king/zxing/app/CustomCaptureActivity.java
@@ -58,7 +58,7 @@ public class CustomCaptureActivity extends CaptureActivity {
 //                .framingRectHorizontalOffset(0)//设置识别区域水平方向偏移量，非全屏识别时才有效
                 .frontLightMode(FrontLightMode.AUTO)//设置闪光灯模式
                 .tooDarkLux(45f)//设置光线太暗时，自动触发开启闪光灯的照度值
-                .brightEnoughLux(450f)//设置光线足够明亮时，自动触发关闭闪光灯的照度值
+                .brightEnoughLux(100f)//设置光线足够明亮时，自动触发关闭闪光灯的照度值
                 .continuousScan(isContinuousScan);//是否连扫
     }
 
diff --git a/lib/src/main/java/com/king/zxing/CaptureHandler.java b/lib/src/main/java/com/king/zxing/CaptureHandler.java
index dab16ad..ee7424c 100644
--- a/lib/src/main/java/com/king/zxing/CaptureHandler.java
+++ b/lib/src/main/java/com/king/zxing/CaptureHandler.java
@@ -110,7 +110,7 @@ public class CaptureHandler extends Handler implements ResultPointCallback {
         quit.sendToTarget();
         try {
             // Wait at most half a second; should be enough time, and onPause() will timeout quickly
-            decodeThread.join(500L);
+            decodeThread.join(100L);
         } catch (InterruptedException e) {
             // continue
         }
@@ -198,4 +198,4 @@ public class CaptureHandler extends Handler implements ResultPointCallback {
     public void setSupportAutoZoom(boolean supportAutoZoom) {
         isSupportAutoZoom = supportAutoZoom;
     }
-}
+}
\ No newline at end of file
diff --git a/lib/src/main/java/com/king/zxing/CaptureHelper.java b/lib/src/main/java/com/king/zxing/CaptureHelper.java
index c1120f2..5a81c53 100644
--- a/lib/src/main/java/com/king/zxing/CaptureHelper.java
+++ b/lib/src/main/java/com/king/zxing/CaptureHelper.java
@@ -47,7 +47,7 @@ import androidx.fragment.app.Fragment;
 /**
  * @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
  */
-public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,CaptureManager  {
+public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,CaptureManager, SurfaceHolder.Callback  {
 
     public static final String TAG = CaptureHelper.class.getSimpleName();
 
@@ -65,7 +65,6 @@ public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,Capture
 
     private ViewfinderView viewfinderView;
     private SurfaceHolder surfaceHolder;
-    private SurfaceHolder.Callback callback;
     private View ivTorch;
 
     private Collection<BarcodeFormat> decodeFormats;
@@ -145,6 +144,8 @@ public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,Capture
      */
     private OnCaptureCallback onCaptureCallback;
 
+    private boolean hasCameraFlash;
+
     /**
      * use {@link #CaptureHelper(Fragment, SurfaceView, ViewfinderView, View)}
      * @param fragment
@@ -193,49 +194,8 @@ public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,Capture
         beepManager = new BeepManager(activity);
         ambientLightManager = new AmbientLightManager(activity);
 
-        cameraManager = new CameraManager(activity);
-        cameraManager.setFullScreenScan(isFullScreenScan);
-        cameraManager.setFramingRectRatio(framingRectRatio);
-        cameraManager.setFramingRectVerticalOffset(framingRectVerticalOffset);
-        cameraManager.setFramingRectHorizontalOffset(framingRectHorizontalOffset);
-        if(ivTorch !=null && activity.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)){
-            ivTorch.setOnClickListener(v -> cameraManager.setTorch(!ivTorch.isSelected()));
-            cameraManager.setOnSensorListener((torch, tooDark, ambientLightLux) -> {
-                if(tooDark){
-                    if(ivTorch.getVisibility() != View.VISIBLE){
-                        ivTorch.setVisibility(View.VISIBLE);
-                    }
-                }else if(!torch){
-                    if(ivTorch.getVisibility() == View.VISIBLE){
-                        ivTorch.setVisibility(View.INVISIBLE);
-                    }
-                }
-            });
-            cameraManager.setOnTorchListener(torch -> ivTorch.setSelected(torch));
-
-        }
-        callback = new SurfaceHolder.Callback() {
-            @Override
-            public void surfaceCreated(SurfaceHolder holder) {
-                if (holder == null) {
-                    Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
-                }
-                if (!hasSurface) {
-                    hasSurface = true;
-                    initCamera(holder);
-                }
-            }
-
-            @Override
-            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
-
-            }
-
-            @Override
-            public void surfaceDestroyed(SurfaceHolder holder) {
-                hasSurface = false;
-            }
-        };
+        hasCameraFlash = activity.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
+        initCameraManager();
 
         onCaptureListener = (result, barcode, scaleFactor) -> {
             inactivityTimer.onActivity();
@@ -257,17 +217,15 @@ public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,Capture
     @Override
     public void onResume(){
         beepManager.updatePrefs();
-        ambientLightManager.start(cameraManager);
 
         inactivityTimer.onResume();
 
-        surfaceHolder.addCallback(callback);
-
         if (hasSurface) {
             initCamera(surfaceHolder);
         } else {
-            surfaceHolder.addCallback(callback);
+            surfaceHolder.addCallback(this);
         }
+        ambientLightManager.start(cameraManager);
     }
 
 
@@ -282,7 +240,7 @@ public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,Capture
         beepManager.close();
         cameraManager.closeDriver();
         if (!hasSurface) {
-            surfaceHolder.removeCallback(callback);
+            surfaceHolder.removeCallback(this);
         }
     }
 
@@ -327,6 +285,35 @@ public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,Capture
         return false;
     }
 
+    private void initCameraManager(){
+        cameraManager = new CameraManager(activity);
+        cameraManager.setFullScreenScan(isFullScreenScan);
+        cameraManager.setFramingRectRatio(framingRectRatio);
+        cameraManager.setFramingRectVerticalOffset(framingRectVerticalOffset);
+        cameraManager.setFramingRectHorizontalOffset(framingRectHorizontalOffset);
+        if(ivTorch !=null && hasCameraFlash){
+            ivTorch.setOnClickListener(v -> {
+                if(cameraManager!=null){
+                    cameraManager.setTorch(!ivTorch.isSelected());
+                }
+            });
+            cameraManager.setOnSensorListener((torch, tooDark, ambientLightLux) -> {
+                if(tooDark){
+                    if(ivTorch.getVisibility() != View.VISIBLE){
+                        ivTorch.setVisibility(View.VISIBLE);
+                    }
+                }else if(!torch){
+                    if(ivTorch.getVisibility() == View.VISIBLE){
+                        ivTorch.setVisibility(View.INVISIBLE);
+                    }
+                }
+            });
+            cameraManager.setOnTorchListener(torch -> ivTorch.setSelected(torch));
+
+        }
+    }
+
+
     /**
      * 初始化Camera
      * @param surfaceHolder
@@ -357,6 +344,27 @@ public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,Capture
         }
     }
 
+    @Override
+    public void surfaceCreated(SurfaceHolder holder) {
+        if (holder == null) {
+            Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
+        }
+        if (!hasSurface) {
+            hasSurface = true;
+            initCamera(holder);
+        }
+    }
+
+    @Override
+    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
+
+    }
+
+    @Override
+    public void surfaceDestroyed(SurfaceHolder holder) {
+        hasSurface = false;
+    }
+
     /**
      * 处理变焦缩放
      * @param isZoomIn
@@ -485,7 +493,8 @@ public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,Capture
         onResult(result);
     }
 
-    /**
+    /**';, mnb
+     *
      * 接收扫码结果，想支持连扫时，可将{@link #continuousScan(boolean)}设置为{@code true}
      * 如果{@link #isContinuousScan}支持连扫，则默认重启扫码和解码器；当连扫逻辑太复杂时，
      * 请将{@link #autoRestartPreviewAndDecode(boolean)}设置为{@code false}，并手动调用{@link #restartPreviewAndDecode()}
diff --git a/lib/src/main/java/com/king/zxing/InactivityTimer.java b/lib/src/main/java/com/king/zxing/InactivityTimer.java
index d06b262..891cad7 100644
--- a/lib/src/main/java/com/king/zxing/InactivityTimer.java
+++ b/lib/src/main/java/com/king/zxing/InactivityTimer.java
@@ -50,7 +50,7 @@ final class InactivityTimer {
         onActivity();
     }
 
-    synchronized void onActivity() {
+    void onActivity() {
         cancel();
         inactivityTask = new InactivityAsyncTask(activity);
         try {
@@ -60,7 +60,7 @@ final class InactivityTimer {
         }
     }
 
-    synchronized void onPause() {
+    void onPause() {
         cancel();
         if (registered) {
             activity.unregisterReceiver(powerStatusReceiver);
@@ -70,7 +70,7 @@ final class InactivityTimer {
         }
     }
 
-    synchronized void onResume() {
+    void onResume() {
         if (registered) {
             Log.w(TAG, "PowerStatusReceiver was already registered?");
         } else {
@@ -80,7 +80,7 @@ final class InactivityTimer {
         onActivity();
     }
 
-    private synchronized void cancel() {
+    private void cancel() {
         AsyncTask<?,?,?> task = inactivityTask;
         if (task != null) {
             task.cancel(true);
diff --git a/lib/src/main/java/com/king/zxing/camera/CameraManager.java b/lib/src/main/java/com/king/zxing/camera/CameraManager.java
index 46e85f6..8dc218e 100644
--- a/lib/src/main/java/com/king/zxing/camera/CameraManager.java
+++ b/lib/src/main/java/com/king/zxing/camera/CameraManager.java
@@ -90,7 +90,7 @@ public final class CameraManager {
      * @param holder The surface object which the camera will draw preview frames into.
      * @throws IOException Indicates the camera driver failed to open.
      */
-    public synchronized void openDriver(SurfaceHolder holder) throws IOException {
+    public void openDriver(SurfaceHolder holder) throws IOException {
         OpenCamera theCamera = camera;
         if (theCamera == null) {
             theCamera = OpenCameraInterface.open(requestedCameraId);
@@ -147,7 +147,7 @@ public final class CameraManager {
     /**
      * Closes the camera driver if still in use.
      */
-    public synchronized void closeDriver() {
+    public void closeDriver() {
         if (camera != null) {
             camera.getCamera().release();
             camera = null;
@@ -161,7 +161,7 @@ public final class CameraManager {
     /**
      * Asks the camera hardware to begin drawing preview frames to the screen.
      */
-    public synchronized void startPreview() {
+    public void startPreview() {
         OpenCamera theCamera = camera;
         if (theCamera != null && !previewing) {
             theCamera.getCamera().startPreview();
@@ -173,7 +173,7 @@ public final class CameraManager {
     /**
      * Tells the camera to stop drawing preview frames.
      */
-    public synchronized void stopPreview() {
+    public void stopPreview() {
         if (autoFocusManager != null) {
             autoFocusManager.stop();
             autoFocusManager = null;
diff --git a/versions.gradle b/versions.gradle
index 21aa7db..9b140f7 100644
--- a/versions.gradle
+++ b/versions.gradle
@@ -1,7 +1,7 @@
 //App 
 def app_version = [:]
-app_version.versionCode = 16
-app_version.versionName = "1.1.4-androidx"
+app_version.versionCode = 18
+app_version.versionName = "1.1.5-androidx"
 ext.app_version = app_version
 
 //build version