private FirebaseStorage storage=FirebaseStorage.getInstance();
private ImageView mIm;
private StorageReference

mIm=(ImageView)findViewById(R.id.imageViewtiko);
    final long ONE_MEGABYTE=1024*1024;
    storageRef.getBytes(ONE_MEGABYTE).addOnSuccessListener(new OnSuccessListener<byte[]>() {
        @Override
        public void onSuccess(byte[] bytes) {
            Bitmap bitmap=BitmapFactory.decodeByteArray(bytes,0,bytes.length);
            mIm.setImageBitmap(bitmap);
        }
    });