Firebase realtime database retrieve null-CodePudding

I want retrieve a video url from Firebase realtime database, but the url is null.

This is my database:

enter image description here

The video is located in the Firebase Storage. If I search the URL, Google finds it

This is my code:

public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
    listaEsercizi.clear();
    for (DataSnapshot snapshot: dataSnapshot.getChildren()) {
        String nome = snapshot.getValue(Esercizio.class).getNome();
        String video = snapshot.getValue(Esercizio.class).getVideoURI().toString();
        listaEsercizi.add(new Esercizio(video, nome));
    }

So, the string in "nome" is "Parallele", but the string in "video" is null.

From the debug I realized that in "getVideoUri().toString()" exist the URL, but lost in assignment.

CodePudding user response：

Your naming for your Video is not match as the database.

Change from:

private String videoURI;
//Here is video getset

To:

private String video;
//Here is video getset

And then, you can call them like this:

 String nome = snapshot.getValue(Esercizio.class).getNome();
 String video = snapshot.getValue(Esercizio.class).getVideo();
 listaEsercizi.add(new Esercizio(video, nome));