private StorageReference storageReference;

//path where images of user profile and cover will be stored
private String storagePath = "Users_Profile_Cover_Images/";

//permission constants
private static final int CAMERA_REQUEST_CODE = 100;
private static final int STORAGE_REQUEST_CODE = 200;
private static final int IMAGE_PICK_CAMERA_CODE = 400;

//arrays of permissions to be requested
private String[] cameraPermission;
private String[] storageaPermission;

//uri of picked images
private Uri image_uri;
//for checking profile or cover photo
private String profileOrCoverPhoto;

 public View onCreateView(@NonNull LayoutInflater inflater, @Nullable
ViewGroup container, @Nullable Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.activity_profile, container,
false);

//init arrays of permissions
    cameraPermission = new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE};
    storageaPermission = new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE};

//init views
    avatarIv = view.findViewById(R.id.profileIv);

 Query query = databaseReference.orderByChild("email").equalTo(user.getEmail());
    query.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

            for (DataSnapshot ds : dataSnapshot.getChildren()) {
                //get data
                String email = "" + ds.child("email").getValue();
                String image = "" + ds.child("image").getValue();
                try {
                    Picasso.get().load(image).fit().into(avatarIv);
                }
                catch (Exception e)
                {
                    Picasso.get().load(R.drawable.ic_people).into(avatarIv);
                }