How to get URL getDownloadURL from Firebase Storage

Please refer to the documentation for the download URL .

When you call getDownloadUrl(), the call is asynchronous and you must subscribe to the success callback to get the result:

// Calls the server to securely obtain an unguessable download Url
private void getUrlAsync (String date){
    // Points to the root reference
    StorageReference storageRef = FirebaseStorage.getInstance().getReference();
    StorageReference dateRef = storageRef.child("/" + date+ ".csv");
    dateRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>()
    {
        @Override
        public void onSuccess(Uri downloadUrl) 
        {                
           //do something with downloadurl
        } 
    });
}

This will return a public, unguessable download URL. If you're just uploading a file, this public url will be in the upload's success callback (you don't need to call other async methods after uploading).

However, if you just want to Stringrepresent the reference, you can call.toString()

// Returns a Uri of the form gs://bucket/path that can be used
// in future calls to getReferenceFromUrl to perform additional
// actions
private String niceRefLink (String date){
    // Points to the root reference
    StorageReference storageRef = FirebaseStorage.getInstance().getReference();
    StorageReference dateRef = storageRef.child("/" + date+ ".csv");
    return dateRef.toString();
}