android - how to get sensor size for api below 21? -


how sensor size of camera api level below 21? can use size f api level 21 , above. have used size f in code not working devices have used following code. 

 private sizef getcameraresolution(int camnum) {     sizef size = new sizef(0,0);     cameramanager manager = (cameramanager) getsystemservice(context.camera_service);     try {         string[] cameraids = manager.getcameraidlist();         if (cameraids.length > camnum) {             cameracharacteristics character = manager.getcameracharacteristics(cameraids[camnum]);             size =character.get(cameracharacteristics.sensor_info_physical_size);          }     }     catch (cameraaccessexception e)     {         log.e("yourlogstring", e.getmessage(), e);     }     return size; }


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