How I Can Display Name Of My Target In Calendarview?

At the moment I managed to add a date field to my model Target. The structure you can see in the screen: Also i have a fragment where I display the calendar. How can I tell by cli

Solution 1:

According to the earlier comments, you confirmed that you want when someone is clicking on a date in the calendar to query the targets node using that date to find one or more results. But first thing first.

For searching purposes, storing the date as a String might work, since you can use for comparation whereEqualTo() method but if you want to order the results, it won't work since the strings are order lexicographically. So you might consider storing the date as a ServerValue.TIMESTAMP, as explained in my answer from the following post:

• How to save the current date/time when I add new value to Firebase Realtime Database

Furthermore, I will provide you the solution for your particular use, where the date is a String but can simply change it later if you'll consider using the solution above. So I will use as a selected date the following String:

valselectedDate="24 October 2019"

Assuming that this value is coming from the selection of the date from your calendar, please try the code below:

val uid = FirebaseAuth.getInstance().currentUser!!.uid
val rootRef = FirebaseDatabase.getInstance().reference
val targetsRef = rootRef.child("targets").child("users").child(uid).child("targets")
val query = targetsRef.orderByChild("date").equalTo(selectedDate)
val valueEventListener = object : ValueEventListener {
    overridefunonDataChange(dataSnapshot: DataSnapshot) {
        for (ds in dataSnapshot.children) {
            val name = ds.child("name").getValue(String::class.java)
            Log.d(TAG, name)
        }
    }

    overridefunonCancelled(databaseError: DatabaseError) {
        Log.d(TAG, databaseError.getMessage()) //Don't ignore errors!
    }
}
query.addListenerForSingleValueEvent(valueEventListener)

In this case, the result in your logcat will be:

target

Edit:

I get the names of all the targets created regardless of the selected date in the calendar.

You get all the dates because you forgot to call .equalTo(selectedDate). So please change:

valquery= targetsRef.orderByChild("date")

to

valquery= targetsRef.orderByChild("date").equalTo(selectedDate)