Android camera android hardware Camera deprecated

Question

if android hardware Camera is deprecated and you cannot use the variable Camera  then what would be the alternative to this

User · Answer

Now we have to use android hardware camera2 as android hardware Camera is deprecated which will only work on API  23  FlashLight     public class MainActivity extends AppCompatActivity         Button button        Boolean light true        CameraDevice cameraDevice        private CameraManager cameraManager        private CameraCharacteristics cameraCharacteristics        String cameraId         Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main           button  Button findViewById R id button           cameraManager    CameraManager           getSystemService Context CAMERA SERVICE           try             cameraId   cameraManager getCameraIdList   0             catch  CameraAccessException e                e printStackTrace                      button setOnClickListener new View OnClickListener                  Override             public void onClick View v                    if light                       try                            cameraManager setTorchMode cameraId true                         catch  CameraAccessException e                            e printStackTrace                                               light false                       else                        try                          cameraManager setTorchMode cameraId false                         catch  CameraAccessException e                            e printStackTrace                                                light true

User · Answer

Faced with the same issue  supporting older devices via the deprecated camera API and needing the new Camera2 API for both current devices and moving into the future  I ran into the same issues -- and have not found a 3rd party library that bridges the 2 APIs  likely because they are very different  I turned to basic OOP principals    The 2 APIs are markedly different making interchanging them problematic for client objects expecting the interfaces presented in the old API  The new API has different objects with different methods  built using a different architecture  Got love for Google  but ragnabbit  that s frustrating   So I created an interface focussing on only the camera functionality my app needs  and created a simple wrapper for both APIs that implements that interface  That way my camera activity doesn t have to care about which platform its running on      I also set up a Singleton to manage the API s   instancing the older API s wrapper with my interface for older Android OS devices  and the new API s wrapper class for newer devices using the new API  The singleton has typical code to get the API level and then instances the correct object   The same interface is used by both wrapper classes  so it doesn t matter if the App runs on Jellybean or Marshmallow--as long as the interface provides my app with what it needs from either Camera API  using the same method signatures  the camera runs in the App the same way for both newer and older versions of Android   The Singleton can also do some related things not tied to the APIs--like detecting that there is indeed a camera on the device  and saving to the media library   I hope the idea helps you out

User · Answer

API Documentation According to the Android developers guide for android hardware Camera  they state   We recommend using the new android hardware camera2 API for new applications   On the information page about android hardware camera2   linked above   it is stated   The android hardware camera2 package provides an interface to individual camera devices connected to an Android device  It replaces the deprecated Camera class   The problem When you check that documentation you ll find that the implementation of these 2 Camera API s are very different  For example getting camera orientation on android hardware camera  Override public int getOrientation final int cameraId        Camera CameraInfo info   new Camera CameraInfo        Camera getCameraInfo cameraId  info       return info orientation     Versus android hardware camera2  Override public int getOrientation final int cameraId        try           CameraManager manager    CameraManager  context getSystemService Context CAMERA SERVICE           String   cameraIds   manager getCameraIdList            CameraCharacteristics characteristics   manager getCameraCharacteristics cameraIds cameraId            return characteristics get CameraCharacteristics SENSOR ORIENTATION         catch  CameraAccessException e               TODO handle error properly or pass it on         return 0           This makes it hard to switch from one to another and write code that can handle both implementations  Note that in this single code example I already had to work around the fact that the olde camera API works with int primitives for camera IDs while the new one works with String objects  For this example I quickly fixed that by using the int as an index in the new API  If the camera s returned aren t always in the same order this will already cause issues  Alternative approach is to work with String objects and String representation of the old int cameraIDs which is probably safer  One away around Now to work around this huge difference you can implement an interface first and reference that interface in your code  Here I ll list some code for that interface and the 2 implementations  You can limit the implementation to what you actually use of the camera API to limit the amount of work  In the next section I ll quickly explain how to load one or another  The interface wrapping all you need  to limit this example I only have 2 methods here  public interface CameraSupport       CameraSupport open int cameraId       int getOrientation int cameraId      Now have a class for the old camera hardware api   SuppressWarnings  quot deprecation quot   public class CameraOld implements CameraSupport        private Camera camera        Override     public CameraSupport open final int cameraId            this camera   Camera open cameraId           return this              Override     public int getOrientation final int cameraId           Camera CameraInfo info   new Camera CameraInfo           Camera getCameraInfo cameraId  info          return info orientation           And another one for the new hardware api  public class CameraNew implements CameraSupport        private CameraDevice camera      private CameraManager manager       public CameraNew final Context context            this manager    CameraManager  context getSystemService Context CAMERA SERVICE               Override     public CameraSupport open final int cameraId            try               String   cameraIds   manager getCameraIdList                manager openCamera cameraIds cameraId   new CameraDevice StateCallback                      Override                 public void onOpened CameraDevice camera                        CameraNew this camera   camera                                      Override                 public void onDisconnected CameraDevice camera                        CameraNew this camera   camera                         TODO handle                                     Override                 public void onError CameraDevice camera  int error                        CameraNew this camera   camera                         TODO handle                                  null             catch  Exception e                   TODO handle                   return this              Override     public int getOrientation final int cameraId            try               String   cameraIds   manager getCameraIdList                CameraCharacteristics characteristics   manager getCameraCharacteristics cameraIds cameraId                return characteristics get CameraCharacteristics SENSOR ORIENTATION             catch  CameraAccessException e                   TODO handle             return 0                     Loading the proper API Now to load either your CameraOld or CameraNew class you ll have to check the API level since CameraNew is only available from api level 21  If you have dependency injection set up already you can do so in your module when providing the CameraSupport implementation  Example   Module public class CameraModule         Provides     CameraSupport provideCameraSupport            if  Build VERSION SDK INT  gt   Build VERSION CODES LOLLIPOP                return new CameraNew context             else               return new CameraOld                        If you don t use DI you can just make a utility or use Factory pattern to create the proper one  Important part is that the API level is checked

User · Answer

if   getActivity   getPackageManager   hasSystemFeature PackageManager FEATURE CAMERA FLASH                CameraManager cameraManager  CameraManager  getActivity   getSystemService Context CAMERA SERVICE                try                  String cameraId   cameraManager getCameraIdList   0                  cameraManager setTorchMode cameraId true                catch  CameraAccessException e                   e printStackTrace

User · Answer

Answers provided here as which camera api to use are wrong. Or better to say they are insufficient.

Some phones (for example Samsung Galaxy S6) could be above api level 21 but still may not support Camera2 api.

CameraCharacteristics mCameraCharacteristics = mCameraManager.getCameraCharacteristics(mCameraId);
Integer level = mCameraCharacteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL);
if (level == null || level == CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY) {
    return false;
}

CameraManager class in Camera2Api has a method to read camera characteristics. You should check if hardware wise device is supporting Camera2 Api or not.

But there are more issues to handle if you really want to make it work for a serious application: Like, auto-flash option may not work for some devices or battery level of the phone might create a RuntimeException on Camera or phone could return an invalid camera id and etc.

So best approach is to have a fallback mechanism as for some reason Camera2 fails to start you can try Camera1 and if this fails as well you can make a call to Android to open default Camera for you.

[android] Android camera android.hardware.Camera deprecated

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