파이어베이스 storage 사용하는 코드

//스트림에서 업로드
firebaseStorage = FirebaseStorage.getInstance(); //저장소 인스턴스 가져오기
rootReference = firebaseStorage.getReferenceFromUrl("gs://realtimedatabase-3d54a.appspot.com");
StorageReference imageReference = rootReference.child("images"); //create a reference to "mountauns.jpg"
StorageReference mountainImageRef = rootReference.child("images/mountains.jpg");

InputStream stream = null;
try {
    stream = new FileInputStream(new File("/storage/emulated/0/Pictures/KakaoTalk/1484276153455.JPEG"));
    uploadTask = imageReference.child(stream.toString()).putStream(stream);
    uploadTask.addOnFailureListener(new OnFailureListener() {
        @Override
        public void onFailure(@NonNull Exception exception) {
            // Handle unsuccessful uploads
        }
    }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
        @Override
        public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
            // taskSnapshot.getMetadata() contains file metadata such as size, content-type, and download URL.
            Uri downloadUrl = taskSnapshot.getDownloadUrl();
        }
    });
} catch (FileNotFoundException e) {
    e.printStackTrace();
    Toast.makeText(this, "예외발생!!!", Toast.LENGTH_SHORT).show();
}

//로컬 파일에서 업로드
firebaseStorage = FirebaseStorage.getInstance();
rootReference = firebaseStorage.getReferenceFromUrl("gs://realtimedatabase-3d54a.appspot.com");
StorageReference reference = rootReference.child("picture");

Uri file = Uri.fromFile(new File("/storage/emulated/0/Pictures/KakaoTalk/1484276153455.JPEG"));
StorageReference riversRef = reference.child(file.getLastPathSegment()); //picture 하위에 파일의 getLastPathSegment가 참조하는 곳에 이미지 저장
uploadTask = riversRef.putFile(file);

uploadTask.addOnFailureListener(new OnFailureListener() {
    @Override
    public void onFailure(@NonNull Exception e) {
        Toast.makeText(MainActivity.this, "이미지 업로드 실패", Toast.LENGTH_SHORT).show();
    }
});
uploadTask.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
    @Override
    public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
        Toast.makeText(MainActivity.this, "이미지 업로드 성공", Toast.LENGTH_SHORT).show();
    }
});