Android Camera2 front camera

Question

I recently noticed that the Camera API is deprecated and I found the new API called Camera2.

I have read the documentation but I don\'t really understand it.

So

Answer 1

We can get the Characteristics of the cameras in our device

   private void getCameraCharacteristics (){
       try {
       CameraManager manager=(CameraManager)getSystemService(Context.CAMERA_SERVICE);
           for(String id : manager.getCameraIdList()){
               Log.e(TAG, "Camara: Id " + id );
               CameraCharacteristics cameraCharacteristics = manager.getCameraCharacteristics(id);
               List> listaCaracteristicas = cameraCharacteristics.getKeys();
               for(CameraCharacteristics.Key caracteristica : listaCaracteristicas){
                   Log.i(TAG,  "caracteristic: " + caracteristica.getName()  + " : " + cameraCharacteristics.get(caracteristica));
               }
               Log.i(TAG, listaCaracteristicas.toString());
           }
       } catch (CameraAccessException e) {
           e.printStackTrace();
       }

   }

one of this characteristics is android.lens.facing, so based on this value we can get the Frontal camera:

 if(cameraCharacteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_FRONT){
              //Frontal camera
  }

This is a method to get this value:

private String getIdFrontalCamera () {
    try {
        CameraManager manager=(CameraManager)getSystemService(Context.CAMERA_SERVICE);
        for(String id : manager.getCameraIdList()){
            CameraCharacteristics cameraCharacteristics = manager.getCameraCharacteristics(id);
            //Seek frontal camera.
            if(cameraCharacteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_FRONT){
                Log.i(TAG, "Camara frontal id " + id);
                return id;
            }
        }
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
    return "0";
}

most of the times the id of the frontal camera is 1.