I get from Firebase Realtime Database data by task.getResult().getValue(). It looks like:

{
    jyIibta0UWaRF2={Name=Value1, Surname=Value2},
    Oy8r5SEYacKKM2={Name=Value3, Surname=Value4}
}

How can I convert it to Array. So I can find an item by its index.
Like:

data[1][1]; //Must return "Surname=Value4"

CodePudding user response：

To convert the object to an array, you could do something like this:

const obj = {
    jyIibta0UWaRF2: {Name: "Value1", Surname: "Value2"},
    Oy8r5SEYacKKM2: {Name: "Value3", Surname: "Value4"}
}

let data = [];
Object.keys(obj).forEach((key) => {
  data.push(["Name=" obj[key].Name, "Surname=" obj[key].Surname]);
});

console.log(data[1][1]);

<iframe name="sif1" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe>

---

But since you mention this comes from Firebase Realtime Database, I recommend learning to navigate the DataSnapshot class from there. Given a snapshot with the structure you show, you can navigate it with:

for (DataSnapshot child: snapshot.getChildren()) {
    Log.d("Firebase", child.getKey()); // "jyIibta0UWaRF2", "Oy8r5SEYacKKM2"
    Log.d("Firebsae", child.child("Surname").getValue(String.class); // "Value2", "Value4"
}

This uses the two ways to navigate data in a DataSnapshot:

• If you don't know the key of what you need, you can loop over all children/properties with getChildren().
• If you know the key/name of what you need, you can access it with child(...).

And to retrieve data:

• Call getValue(...) with the type of data of the property (a String.class in this case.