从firebase android检索数据

问题描述

我的问题是，我无法阅读我在firebase上的数据，而且我花了三天的时间阅读。

I am studying in France and I have trouble finding French tutorials to solve my problem. I am therefore obliged to ask my question, hoping to have a satisfactory solution.

我开始编写代码，我能够恢复密钥，但是我不能恢复这些值nomargent等。

My problem is that I have trouble reading my data on firebase and I have spent three days on it.

I have a structure like this:

I had started to code something, I was able to recover the key but I could not recuperate these values "nom" "argent" etc .

public void onChildAdded(DataSnapshot dataSnapshot, String s) {
    String cle = dataSnapshot.getKey();
    String nom = dataSnapshot.child("nom").getValue(String.class);
    Toast.makeText(ListeActivity.this,"la cle est : "+cle+" nom est : "+nom ,Toast.LENGTH_SHORT).show();

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