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+---
+layout: default-layout
+title: CameraEnhancer - Dynamsoft Camera Enhancer API Reference
+description: The class CameraEnhancer of Dynamsoft Camera Enhancer defines the camera controlling APIs.
+keywords: camera enhancer, Java, Kotlin
+needGenerateH3Content: true
+needAutoGenerateSidebar: true
+noTitleIndex: true
+permalink: /programming/android/primary-api/camera-enhancer.html
+---
+
+# CameraEnhancer
+
+The `CameraEnhancer` class is the primary class of Dynamsoft Camera Enhancer that defines the camera controlling APIs. It is a subclass of `ImageSourceAdapter`.
+
+## Definition
+
+*Assembly:* package com.dynamsoft.dce
+
+```java
+class CameraEnhancer extends ImageSourceAdapter
+```
+
+## Methods
+
+| Method | Description |
+|------- |-------------|
+| [`CameraEnhancer`](#cameraenhancer) | The constructor. |
+| [`CameraEnhancer`](#cameraenhancer) | The constructor. |
+| [`addListener`](#addlistener) | Add a VideoFrameListener to receive callback when video frames are output. |
+| [`removeListener`](#removelistener) | Remove a VideoFrameListener. |
+| [`takePhoto`](#takephoto) | Take a photo. |
+| [`getCameraPosition`](#getcameraposition) | Get the camera position. |
+| [`setZoomFactor`](#setzoomfactor) | Set the zoom factor of the camera. You can use getCapabilities to check the maximum available zoom factor. |
+| [`getZoomFactor`](#getzoomfactor) | Get the zoom factor of the camera. |
+| [`getFocusMode`](#getfocusmode) | Get the currently actived focus mode. |
+| [`initSystemSettingsFromFile`](#initsystemsettingsfromfile) | Initialize system settings from a JSON file. The system settings contain more precise camera control parameters. |
+| [`initSystemSettings`](#initsystemsettings) | Initialize system settings from a JSON string. The system settings contain more precise camera control parameters. |
+| [`resetSystemSettings`](#resetsystemsettings) | Reset the system settings to default value. |
+| [`initEnhancedSettingsFromFile`](#initenhancedsettingsfromfile) | Initialize enhanced settings from a JSON file. The enhanced settings contain auxiliary parameters of enhanced features. |
+| [`initEnhancedSettings`](#initenhancedsettings) | Initialize enhanced settings from a JSON string. The enhanced settings contain auxiliary parameters of enhanced features. |
+| [`outputEnhancedSettings`](#outputenhancedsettings) | Output the enhanced settings to a JSON string. The enhanced settings contain auxiliary parameters of enhanced features. |
+| [`outputEnhancedSettingsToFile`](#outputenhancedsettingstofile) | Output the enhanced settings to a JSON file. The enhanced settings contain auxiliary parameters of enhanced features. |
+| [`resetEnhancedSettings`](#resetenhancedsettings) | Reset the enhanced settings to default value. |
+| [`getCapabilities`](#getcapabilities) | Get the device capabilities including zoom factor, ISO, exposure time, etc. |
+| [`getCameraState`](#getcamerastate) | Get the device capabilities including zoom factor, ISO, exposure time, etc. |
+| [`setCameraStateListener`](#setcamerastatelistener) | Set a CameraStateListener to receive callback when the camera state changed. |
+| [`enableEnhancedFeatures`](#enableenhancedfeatures) | Enable the specified enhanced features. View EnumEnhancedFeatures for more details. |
+| [`disableEnhancedFeatures`](#disableenhancedfeatures) | Disable the specified enhanced features. View EnumEnhancedFeatures for more details. |
+| [`initWithView`](#cameraenhancerviewactivity) | Create an instance of CameraEnhancer. |
+| [`init`](#cameraenhancer) | Create an instance of CameraEnhancer. |
+| [`setScanRegion`](#setscanregion) | Set a scan region. The video frame is cropped based on the scan region. |
+| [`getScanRegion`](#getscanregion) | Get a scan region. |
+| [`open`](#open) | Open the camera. |
+| [`close`](#close) | Close the camera. |
+| [`setResolution`](#setresolution) | Set the resolution. If the targeting resolution is not available for your device, a closest available resolutionll be selected. |
+| [`getResolution`](#getresolution) | Get the current resolution. |
+| [`selectCamera(position)`](#selectcameraposition) | Select a camera with a camera position. |
+| [`getFrameRate`](#getframerate) | Get the frame rate. |
+| [`turnOnTorch`](#turnontorch) | Turn on the torch. |
+| [`turnOffTorch`](#turnofftorch) | Turn off the torch. |
+| [`setFocus`](#setfocus) | Set the focus point of interest and trigger an one-off auto-focus. |
+| [`setFocus(subsequentFocusMode)`](#setfocussubsequentfocusmode) | Set the focus point of interest and trigger an one-off auto-focus. After the focus, you can either lock the focalngth or keep the continuous auto focus enabled by configuring the subsequent focus mode. |
+| [`convertRectToViewCoordinates`](#convertrecttoviewcoordinates) | Convert the coordinates of a [`DSRect`]({{ site.dcv_android_api }}core/basic-structures/rect.html) under video coordinate system to a CGRect under camera view coordinate system. |
+| [`convertPointToViewCoordinates`](#convertpointtoviewcoordinates) | Convert the coordinates of a CGPoint under video coordinate system to another CGPoint under camera view coordinate system. |
+| [`setImageCaptureDistanceMode`](#setimagecapturedistancemode) | Set/get the capture distance property of the video frame. The capture distance property will be recorded by VideoFrameTag. |
+| [`getImageCaptureDistanceMode`](#getimagecapturedistancemode) | Set/get the capture distance property of the video frame. The capture distance property will be recorded by VideoFrameTag. |
+| [`setAutoZoomRange`](#setautozoomrange) | Set the range of auto zoom. |
+| [`getAutoZoomRange`](#getautozoomrange) | Get the range of auto zoom. |
+| [`cameraView`](#setcameraview) | Set/get the CameraView instance that bind with this CameraEnhancer instance. |
+| [`getAllCameras`](#getallcameras) | Get the IDs of all available cameras. |
+| [`selectCamera`](#selectcamera) | Select a camera with a camera ID. |
+| [`getSelectedCamera`](#getselectedcamera) | Get the currently actived camera. |
+| [`setZoomFactorChangeListener`](#setzoomfactorchangelistener) | Set a `ZoomFactorChangeListener` to receive callback when the zoom-factor changed. |
+
+## Inherited Methods
+
+The following methods are inherited from superclass [`ImageSourceAdapter`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html)
+
+| Method | Description |
+| ------ | ----------- |
+| [`hasNextImageToFetch`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#hasnextimagetofetch) | Determines whether there are more images left to fetch. |
+| [`setMaxImageCount`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#setmaximagecount) | Set the maximum capability of the Video Buffer. |
+| [`getMaxImageCount`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#getmaximagecount) | Get the property defines the maximum capability of the Video Buffer. |
+| [`setBufferOverflowProtectionMode`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#setbufferoverflowprotectionmode) | Sets a mode that determines the action to take when there is a new incoming image and the buffer is full. You can either block the Video Buffer or push out the oldest image and append a new one. |
+| [`getBufferOverflowProtectionMode`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#getbufferoverflowprotectionmode) | Get the buffer overflow protection mode. |
+| [`getImageCount`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#getimagecount) | Get the current image count in the Video Buffer. |
+| [`isBufferEmpty`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#isbufferempty) | Check whether the Video Buffer is empty. |
+| [`setColourChannelUsageType`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#setcolourchannelusagetype) | Set the usage type of a color channel in an image. |
+| [`getColourChannelUsageType`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#getcolourchannelusagetype) | Get the usage type of a color channel in an image. |
+| [`startFetching`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#startfetching) | Start fetching images from the source to the Video Buffer of ImageSourceAdapter. |
+| [`stopFetching`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#stopfetching) | Stop fetching images from the source to the Video Buffer of ImageSourceAdapter. |
+| [`getImage`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#getimage) | Get an image from the Video Buffer. |
+| [`setNextImageToReturn(imageId)`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#setnextimagetoreturnimageid) | Specify the next image that is returned by method getImage. |
+| [`setNextImageToReturn(imageId,keepInBuffer)`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#setnextimagetoreturnimageidkeepinbuffer) | Specify the next image that is returned by method getImage. |
+| [`hasImage`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#hasimage) | Check the availability of the specified image. |
+| [`addImageToBuffer`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#addimagetobuffer) | Adds an image to the buffer of the adapter. |
+| [`clearBuffer`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#clearbuffer) | Clears the image buffer. |
+| [`setErrorListener`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html#seterrorlistener) | Register an error listener to receive callback when error occurs in the [`ImageSourceAdapter`]({{ site.dcv_android_api }}core/basic-structures/image-source-adapter.html). |
+
+### CameraEnhancer(lifecycleOwner)
+
+The constructor.
+
+```java
+CameraEnhancer(@NonNull final LifecycleOwner lifecycleOwner)
+```
+
+**Parameters**
+
+`lifecycleOwner`: An implementation of `LifecycleOwner` such as an `AppCompatActivity` object.
+
+### CameraEnhancer(cameraView, lifecycleOwner)
+
+The constructor.
+
+```java
+CameraEnhancer(@NonNull CameraView cameraView, @NonNull final LifecycleOwner lifecycleOwner)
+```
+
+**Parameters**
+
+`cameraView`: An object of `CameraView`.
+
+`lifecycleOwner`: An implementation of `LifecycleOwner` such as an `AppCompatActivity` object.
+
+### addListener
+
+Add a VideoFrameListener to receive callback when video frames are output.
+
+```java
+void addListener(VideoFrameListener listener){}
+```
+
+**Parameters**
+
+`listener`: A delegate object of VideoFrameListener to receive video frame as a ImageData.
+
+### removeListener
+
+Remove a VideoFrameListener.
+
+```java
+void removeListener(VideoFrameListener listener){}
+```
+
+**Parameters**
+
+`listener`: A delegate object of VideoFrameListener.
+
+### takePhoto
+
+Take a photo.
+
+```java
+void takePhoto(PhotoListener listener) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`photolistener`: A delegate object of PhotoListener to receive the captured photo.
+
+### getCameraPosition
+
+Get the camera position.
+
+```java
+EnumCameraPosition getCameraPosition(){}
+```
+
+**Return Value**
+
+The camera position.
+
+### setZoomFactor
+
+Set the zoom factor of the camera. You can use getCapabilities to check the maximum available zoom factor.
+
+```java
+void setZoomFactor(float factor) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`factor`: The zoom factor.
+
+### getZoomFactor
+
+Get the zoom factor of the camera.
+
+```java
+float getZoomFactor() throws CameraEnhancerException{}
+```
+
+**Return Value**
+
+The zoom factor.
+
+### getFocusMode
+
+Get the currently actived focus mode.
+
+```java
+EnumFocusMode getFocusMode(){}
+```
+
+**Return Value**
+
+The focus mode.
+
+### initSystemSettingsFromFile
+
+Initialize system settings from a JSON file. The system settings contain more precise camera control parameters.
+
+```java
+void initSystemSettingsFromFile(String filePath) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`filePath`: The path of the JSON file.  
+`error`: A NSError pointer. An error occurs when the file path is not available or the JSON datacludes invalid keys or values.
+
+**Return Value**
+
+A bool value that indicates whether the system settings are initialized successfully.
+
+### initSystemSettings
+
+Initialize system settings from a JSON string. The system settings contain more precise camera control parameters.
+
+```java
+void initSystemSettings(String jsonString) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`JsonString`: The JSON string.
+`error`: A NSError pointer. An error occurs when the JSON data includes invalid keys or values.
+
+**Return Value**
+
+A bool value that indicates whether the system settings are initialized successfully.
+
+### resetSystemSettings
+
+Reset the system settings to default value.
+
+```java
+void resetSystemSettings(){}
+```
+
+### initEnhancedSettingsFromFile
+
+Initialize enhanced settings from a JSON file. The enhanced settings contain auxiliary parameters of enhanced features.
+
+```java
+void initEnhancedSettingsFromFile(String filePath) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`filePath`: The JSON string.
+`error`: A NSError pointer. An error occurs when the file path is not available or the JSON data includes invalid keys or values.
+
+**Return Value**
+
+A bool value that indicates whether the enhanced settings are initialized successfully.
+
+### initEnhancedSettings
+
+Initialize enhanced settings from a JSON string. The enhanced settings contain auxiliary parameters of enhanced features.
+
+```java
+void initEnhancedSettings(String jsonString) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`JsonString`: The JSON string.
+`error`: A NSError pointer. An error occurs when the JSON data includes invalid keys or values.
+
+**Return Value**
+
+A bool value that indicates whether the enhanced settings are initialized successfully.
+
+### outputEnhancedSettings
+
+Output the enhanced settings to a JSON string. The enhanced settings contain auxiliary parameters of enhanced features.
+
+```java
+String outputEnhancedSettings() throws CameraEnhancerException;
+```
+
+**Parameters**
+
+`error`: A NSError pointer. An error occurs when the JSON data includes invalid keys or values.
+
+**Return Value**
+
+The enhanced settings in a JSON string.
+
+### outputEnhancedSettingsToFile
+
+Output the enhanced settings to a JSON file. The enhanced settings contain auxiliary parameters of enhanced features.
+
+```java
+void outputEnhancedSettingsToFile(String filePath) throws CameraEnhancerException;
+```
+
+**Parameters**
+
+`file` The path that you want to output the JSON file.
+`error` A NSError pointer. An error occurs when the file path is not available.
+
+**Return Value**
+
+A bool value that indicates whether the enhanced settings are output successfully.
+
+### resetEnhancedSettings
+
+Reset the enhanced settings to default value.
+
+```java
+void resetEnhancedSettings(){}
+```
+
+### getCapabilities
+
+Get the device capabilities including zoom factor, ISO, exposure time, etc.
+
+```java
+Capabilities getCapabilities(){}
+```
+
+**Return Value**
+
+A [Capabilities](../auxiliary-api/capabilities.md) object.
+
+### getCameraState
+
+Tells you whether the camera is open, opening, closing, or closed - each state being represented by a member of the [CameraState]({{ site.dce-enums }}camera-state.html) enumeration.
+
+```java
+EnumCameraState getCameraState(){}
+```
+
+**Return Value**
+
+The camera state.
+
+### setCameraStateListener
+
+Set a [CameraStateListener](../auxiliary-api/interface-dcecamerastatelistener.md) to receive callback when the camera state changes.
+
+```java
+void setCameraStateListener (CameraStateListener listener){}
+```
+
+**Parameters**
+
+`listener`: A delegate object of CameraStateListener to the camera state.
+
+### enableEnhancedFeatures
+
+Enable the specified enhanced features. View [EnumEnhancedFeatures]({{ site.dce-enums }}enhanced-features.html?lang=android) to learn about these enhanced features. By default, these enhanced features are all disabled.
+
+```java
+void enableEnhancedFeatures(int enhancedFeatures) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`enhancedFeatures`: A combined value of `EnumEnhancedFeatures` which indicates a series of enhanced features.
+
+**Return Value**
+
+A bool value that indicates whether the enhanced features are enabled successfully.
+
+### disableEnhancedFeatures
+
+Disable any enhanced features that have been previously enabled. View [EnumEnhancedFeatures]({{ site.dce-enums }}enhanced-features.html?lang=android) to learn about these enhanced features.
+
+```java
+void disableEnhancedFeatures(int enhancerFeatures){}
+```
+
+**Parameters**
+
+`enhancedFeatures`: A combined value of `EnhancedFeatures` which indicates a series of enhanced features.
+
+### CameraEnhancer(view,activity)
+
+Create an instance of CameraEnhancer with a [CameraView](../auxiliary-api/dcecameraview.md) object.
+
+```java
+CameraEnhancer(CameraView view, Activity activity){}
+```
+
+**Parameters**
+
+`view`: A CameraView instance.
+`activity`: An activity object.
+
+**Return Value**
+
+An instance of CameraEnhancer.
+
+### CameraEnhancer
+
+Create an instance of CameraEnhancer.
+
+```java
+CameraEnhancer(Activity activity){}
+```
+
+**Return Value**
+
+An instance of CameraEnhancer.
+
+### setScanRegion
+
+Set a scan region. The video frame is cropped based on the scan region. To learn the full code to setting a scan region, please refer to the [scan region](../guide/scan-region.md) article.
+
+```java
+void setScanRegion(DSRect scanRegion) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`scanRegion`: A [`DSRect`]({{ site.dcv_android_api }}core/basic-structures/rect.html) object.
+`error`: A NSError pointer. An error occurs when the [`DSRect`]({{ site.dcv_android_api }}core/basic-structures/rect.html) data is invalid.
+
+**Return Value**
+
+A bool value that indicates whether the scan region has been successfully set or not.
+
+**Code Snippet**
+
+### getScanRegion
+
+Get the scan region if one has been set.
+
+```java
+DSRect getScanRegion(){}
+```
+
+**Return Value**
+
+A [`DSRect`]({{ site.dcv_android_api }}core/basic-structures/rect.html) object that represent the scan region area.
+
+### open
+
+Open the camera.
+
+```java
+void open() throws CameraEnhancerException{}
+```
+
+### close
+
+Close the camera.
+
+```java
+void close() throws CameraEnhancerException{}
+```
+
+### setResolution
+
+Set the resolution. If the targeted resolution is not available for your device, the closest available resolution will be selected.
+
+```java
+void setResolution(EnumResolution resolution) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`resolution` One of the EnumResolution value.
+
+### getResolution
+
+Get the current resolution.
+
+```java
+Size getResolution(){}
+```
+
+**Return Value**
+
+The current resolution.
+
+### getAvailableResolutions
+
+Get all available resolutions.
+
+```java
+List<Size> getAvailableResolutions(){}
+```
+
+**Return Value**
+
+All available resolutions in a list.
+
+### selectCamera(position)
+
+Select a camera with a camera position.
+
+```java
+selectCamera(EnumCameraPosition position){}
+```
+
+**Parameters**
+
+`position`: One of the `EnumCameraPosition` value.
+`error`: A NSError pointer. An error occurs when failed to switch the camera.
+
+**Return Value**
+
+A bool value that indicates whether the camera selection is successful.
+
+### getFrameRate
+
+Get the frame rate.
+
+```java
+int getFrameRate(){}
+```
+
+**Return Value**
+
+The current frame rate.
+
+### turnOnTorch
+
+Turn on the torch.
+
+```java
+void turnOnTorch() throws CameraEnhancerException{}
+```
+
+### turnOffTorch
+
+Turn off the torch.
+
+```java
+void turnOffTorch() throws CameraEnhancerException{}
+```
+
+### setFocus
+
+Set the focus point of interest and trigger an one-off auto-focus.
+
+```java
+void setFocus(android.graphics.PointF focusPoint) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`focusPoint`: The focus point of interest. The coordinate base of the point is "image".
+
+### setFocus(subsequentFocusMode)
+
+Set the focus point of interest and trigger an one-off auto-focus. After the focus, you can either lock the focalngth or keep the continuous auto focus enabled by configuring the subsequent focus mode.
+
+```java
+void setFocus(android.graphics.PointF focusPoint, EnumFocusMode subsequentFocusMode) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`focusPoint`: The focus point of interest. The coordinate base of the point is "image".  
+`subsequentFocusMode`: The subsequent focus mode.
+
+### convertRectToViewCoordinates
+
+Convert the coordinates of a [`DSRect`]({{ site.dcv_android_api }}core/basic-structures/rect.html) under video coordinate system to a CGRect under camera view coordinate system.
+
+```java
+android.graphics.Rect convertRectToViewCoordinates(com.dynamsoft.core.basic_structure.DSRect videoRect){}
+```
+
+**Parameters**
+
+`videoRect`: The [`DSRect`]({{ site.dcv_android_api }}core/basic-structures/rect.html) that you want to convert.
+
+**Return Value**
+
+A CGRect (coordinate measured in PT) converted from the [`DSRect`]({{ site.dcv_android_api }}core/basic-structures/rect.html).
+
+### convertPointToViewCoordinates
+
+Convert the coordinates of a CGPoint under video coordinate system to another CGPoint under camera view coordinate system.
+
+```java
+Point convertPointToViewCoordinates(Point point){}
+```
+
+**Parameters**
+
+`point`: The CGPoint that you want to convert.
+
+**Return Value**
+
+A CGPoint (coordinate measured in PT) converted from the video CGPoint measured in PT.
+
+### setImageCaptureDistanceMode
+
+Set the capture distance property of the video frame. The capture distance property will be recorded by VideoFrameTag.
+
+```java
+void setImageCaptureDistanceMode(EnumImageCaptureDistanceMode mode){}
+```
+
+### getImageCaptureDistanceMode
+
+Get the capture distance property of the video frame. The capture distance property will be recorded by VideoFrameTag.
+
+```java
+EnumImageCaptureDistanceMode getImageCaptureDistanceMode(){}
+```
+
+### setAutoZoomRange
+
+Set the range of auto zoom.
+
+```java
+void setAutoZoomRange(android.util.Range ){}
+```
+
+**Parameters**
+
+`zoomRange`: The zoom range of the auto zoom feature.
+
+### getAutoZoomRange
+
+Get the range of auto zoom.
+
+```java
+Range getAutoZoomRange(){}
+```
+
+**Return Value**
+
+The zoom range of the auto zoom feature.
+
+### setCameraView
+
+Bind a `CameraView` instance with this `CameraEnhancer` instance.
+
+```java
+void setCameraView(CameraView view){}
+```
+
+### getAllCameras
+
+> This method is deprecated.
+
+Get the IDs of all available cameras.
+
+```java
+String[] getAllCameras(){}
+```
+
+**Return Value**
+
+An array of camera IDs.
+
+### selectCamera
+
+> This method is deprecated.
+
+Select a camera with a camera ID.
+
+```java
+void selectCamera(String cameraID) throws CameraEnhancerException{}
+```
+
+**Parameters**
+
+`position`: One of the Camera IDs.
+`error`: A NSError pointer. An error occurs when failed to switch the camera.
+
+**Return Value**
+
+A bool value that indicates whether the camera selection is successful.
+
+### getSelectedCamera
+
+> This method is deprecated.
+
+Get the currently actived camera.
+
+```java
+String getSelectedCamera(){}
+```
+
+**Return Value**
+
+The ID of the currently actived camera.
+
+### setZoomFactorChangeListener
+
+Set a [`ZoomFactorChangeListener`](../auxiliary-api/interface-zoomfactorchangelistener.md) to receive callback when the zoom-factor changed.
+
+```java
+void setZoomFactorChangeListener(ZoomFactorChangeListener listener);
+```
+
+**Parameters**
+
+`listener`: A [`ZoomFactorChangeListener`](../auxiliary-api/interface-zoomfactorchangelistener.md) to receive callback when the zoom-factor changed.
diff --git a/programming/android/primary-api/camera-enhancer.md b/programming/android/primary-api/camera-enhancer.md
index 7fc2ab5..d45bfa0 100644
--- a/programming/android/primary-api/camera-enhancer.md
+++ b/programming/android/primary-api/camera-enhancer.md
@@ -153,7 +153,7 @@ void removeListener(VideoFrameListener listener){}
 Take a photo.
 
 ```java
-void takePhoto(PhotoListener listener) throws CameraEnhancerException{}
+void takePhoto(PhotoListener listener){}
 ```
 
 **Parameters**
@@ -177,7 +177,7 @@ The camera position.
 Set the zoom factor of the camera. You can use getCapabilities to check the maximum available zoom factor.
 
 ```java
-void setZoomFactor(float factor) throws CameraEnhancerException{}
+void setZoomFactor(float factor){}
 ```
 
 **Parameters**
@@ -189,7 +189,7 @@ void setZoomFactor(float factor) throws CameraEnhancerException{}
 Get the zoom factor of the camera.
 
 ```java
-float getZoomFactor() throws CameraEnhancerException{}
+float getZoomFactor(){}
 ```
 
 **Return Value**
@@ -454,7 +454,7 @@ A [`DSRect`]({{ site.dcv_android_api }}core/basic-structures/rect.html) object t
 Open the camera.
 
 ```java
-void open() throws CameraEnhancerException{}
+void open(){}
 ```
 
 ### close
@@ -462,7 +462,7 @@ void open() throws CameraEnhancerException{}
 Close the camera.
 
 ```java
-void close() throws CameraEnhancerException{}
+void close(){}
 ```
 
 ### setResolution
@@ -470,7 +470,7 @@ void close() throws CameraEnhancerException{}
 Set the resolution. If the targeted resolution is not available for your device, the closest available resolution will be selected.
 
 ```java
-void setResolution(EnumResolution resolution) throws CameraEnhancerException{}
+void setResolution(EnumResolution resolution){}
 ```
 
 **Parameters**
@@ -535,7 +535,7 @@ The current frame rate.
 Turn on the torch.
 
 ```java
-void turnOnTorch() throws CameraEnhancerException{}
+void turnOnTorch(){}
 ```
 
 ### turnOffTorch
@@ -543,7 +543,7 @@ void turnOnTorch() throws CameraEnhancerException{}
 Turn off the torch.
 
 ```java
-void turnOffTorch() throws CameraEnhancerException{}
+void turnOffTorch(){}
 ```
 
 ### setFocus
@@ -551,7 +551,7 @@ void turnOffTorch() throws CameraEnhancerException{}
 Set the focus point of interest and trigger an one-off auto-focus.
 
 ```java
-void setFocus(android.graphics.PointF focusPoint) throws CameraEnhancerException{}
+void setFocus(android.graphics.PointF focusPoint){}
 ```
 
 **Parameters**
@@ -563,7 +563,7 @@ void setFocus(android.graphics.PointF focusPoint) throws CameraEnhancerException
 Set the focus point of interest and trigger an one-off auto-focus. After the focus, you can either lock the focalngth or keep the continuous auto focus enabled by configuring the subsequent focus mode.
 
 ```java
-void setFocus(android.graphics.PointF focusPoint, EnumFocusMode subsequentFocusMode) throws CameraEnhancerException{}
+void setFocus(android.graphics.PointF focusPoint, EnumFocusMode subsequentFocusMode){}
 ```
 
 **Parameters**
@@ -651,6 +651,18 @@ Bind a `CameraView` instance with this `CameraEnhancer` instance.
 void setCameraView(CameraView view){}
 ```
 
+### setZoomFactorChangeListener
+
+Set a [`ZoomFactorChangeListener`](../auxiliary-api/interface-zoomfactorchangelistener.md) to receive callback when the zoom-factor changed.
+
+```java
+void setZoomFactorChangeListener(ZoomFactorChangeListener listener);
+```
+
+**Parameters**
+
+`listener`: A [`ZoomFactorChangeListener`](../auxiliary-api/interface-zoomfactorchangelistener.md) to receive callback when the zoom-factor changed.
+
 ### getAllCameras
 
 > This method is deprecated.
@@ -697,15 +709,3 @@ String getSelectedCamera(){}
 **Return Value**
 
 The ID of the currently actived camera.
-
-### setZoomFactorChangeListener
-
-Set a [`ZoomFactorChangeListener`](../auxiliary-api/interface-zoomfactorchangelistener.md) to receive callback when the zoom-factor changed.
-
-```java
-void setZoomFactorChangeListener(ZoomFactorChangeListener listener);
-```
-
-**Parameters**
-
-`listener`: A [`ZoomFactorChangeListener`](../auxiliary-api/interface-zoomfactorchangelistener.md) to receive callback when the zoom-factor changed.