How to get file URL after uploading them to Firebase?

Question

Once you have uploaded a file to Firebase how can you get it's URL so that you can store that for later use? I want to write the URL to a Firebase Database so that other users can access the image.

I am uploading the file like so:

public void uploadFile()
{

    StorageReference filepath = mstorageRef.child("folder").child(filename);

    Uri File= Uri.fromFile(new File(mFileName));

    filepath.putFile(File).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
        @Override
        public void onSuccess(UploadTask.TaskSnapshot taskSnapshot)
        {
            Toast.makeText(MtActivity.this, "Upload Done", Toast.LENGTH_LONG).show();
        }
    });
}

I have confirmed that the files are in fact uploading so now I just need the URL which I can write to my Database. However when I tried to do this:

Uri downloadUrl = taskSnapshot.getMetadata().getDownloadUrl();

It gives me an error and says This method should only be accessed from tests or within private scope

I'm not sure what that means and I also don't know why I would be getting that error since I'm following this example provided by Firebase.

Is there a new way of getting the URL?

Also, is that URL unique to that item in particular? Meaning if I store it to a database and try to access it later will I be able to do so?

Answer 1

You're using UploadTask.getDownloadUrl() which is deprecated. You can use StorageReference.getDownloadUrl().

In your case you can try this as -

 filepath.putFile(File).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
    @Override
    public void onSuccess(UploadTask.TaskSnapshot taskSnapshot)
    {
         filepath.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                    @Override
                    public void onSuccess(Uri uri) {
                        Uri downloadUrl = uri;
                       //Do what you want with the url
                    }
        Toast.makeText(MtActivity.this, "Upload Done", Toast.LENGTH_LONG).show();
    }
});

Take care that StorageReference.getDownloadUrl() returns Task, which must be handled asynchronously, you cannot do Uri downloadUrl = photoRef.getDownloadUrl().getResult(); else you will get java.lang.IllegalStateException: Task is not yet complete

Answer 2

As already mentioned above, StorageReference.getDownloadUrl() returns Task.

Here is my code:

        filepath.putFile(imageUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {
                if(task.isSuccessful()){

                    filepath.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                        @Override
                        public void onSuccess(Uri uri) {
                            Uri downloadUri = uri;
                            String download_url = uri.toString();
                            mUserDatabase.child("image").setValue(download_url).addOnCompleteListener(new OnCompleteListener<Void>() {
                              @Override

                                public void onComplete(@NonNull Task<Void> task) {

                                   if(task.isSuccessful()) {

                                          mProgressDialog.dismiss();
                                          Toast.makeText(SettingActivity.this, "Successfully uploaded", Toast.LENGTH_LONG).show();

                                   }else {
                                       Toast.makeText(SettingActivity.this, "Error happened during the upload process", Toast.LENGTH_LONG).show();
                                   }
                                }
                            });
                        }
                    });


                }else{
                    Toast.makeText(SettingActivity.this, "Error happened during the upload process", Toast.LENGTH_LONG ).show();
                }
            }
        });

Answer 3

This method works too and is a little bit simpler.

It's not something "incredible", but it reduces your code to a few lines. Hope that it's a helpful answer.

StorageReference filepath = mstorageRef.child("folder").child(filename);
filepath.putFile(File).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
        @Override
        public void onSuccess(UploadTask.TaskSnapshot taskSnapshot){
            Uri downloadUrl = filepath.getDownloadUrl();  // here is Url for photo  
            Toast.makeText(MtActivity.this, "Upload Done", Toast.LENGTH_LONG).show();
        }
});

Answer 4

Here is hot I did it

1) This is my Upload and get http url code:

UploadTask uploadTask = FirebaseStorage.getInstance().getReference().child("id").child("filename")
                                .putFile(uri);
                        Task<Uri> urlTask = uploadTask.continueWithTask(new Continuation<UploadTask.TaskSnapshot, Task<Uri>>() {
                            @Override
                            public Task<Uri> then(@NonNull Task<UploadTask.TaskSnapshot> task) throws Exception {
                                if (!task.isSuccessful()) {
                                    throw task.getException();
                                }

                                // Continue with the task to get the download URL
                                return FirebaseStorage.getInstance().getReference().child(user.getUid()).child(avatarName).getDownloadUrl();
                            }
                        }).addOnCompleteListener(new OnCompleteListener<Uri>() {
                            @Override
                            public void onComplete(@NonNull Task<Uri> task) {
                                if (task.isSuccessful()) {
                                    Uri downloadUri = task.getResult();
                                    FirebaseDatabase.getInstance().getReference().child(user.getUid())
                                            .child(avatarName)
                                            .child("avatar_image")
                                            .setValue(downloadUri.toString());
                                    Toast.makeText(getContext(), "Success", Toast.LENGTH_SHORT).show();
                                } else {
                                    // Handle failures
                                    // ...
                                    Toast.makeText(getContext(), "Failed", Toast.LENGTH_SHORT).show();
                                }
                            }
                        });

2) This my onActivityResult code after pickup image from gallery

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {

        uri = data.getData();

        try {
            bitmap = MediaStore.Images.Media.getBitmap(getContext().getContentResolver(), uri);
            // Log.d(TAG, String.valueOf(bitmap));
            ivAvatarPic.setImageBitmap(bitmap);
            //ImageView imageView = (ImageView) findViewById(R.id.imageView);
            //imageView.setImageBitmap(bitmap);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}