How can I retrieve a random value from Firebase database?

Question

I have a firebase database with a tree that looks like this

tvthemetunes
airwolf value \"url to air wolftheme\"
eastenders value \"url to eastenders\"
knigh         


        

Answer 1

To solve this, please use the following lines of code:

long childrenCount = snapshot.getChildrenCount();
int count = (int) childrenCount;
int randomNumber = new Random().nextInt(count);

And then use a for loop to pull that value using the random number:

int i=0;
String themeTune; //Your random themeTune will be stored here
for (DataSnapshot snap : snapshot.getChildren()) {
    if(i = randomNumber) {
        themeTune = snap.getValue(String.class);
        break;
    }
    i++;
}
plysound();