Firebase Android Error "failed To Convert Value Of Type "

This code is crashing on start; E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.manya.eventspage, PID: 2974 com.google.firebas

Solution 1:

Your code fails to take care of the fact that you have a list of events under /events/events. To handle this correctly you have two approaches:

1. Use a ValueEventListener and loop over the child nodes
2. Use a ChildEventListener

The first is closest to your current code and just adds an extra loop:

myRef=database.getReference().child("events/events"); // note the change in path

myRef.addValueEventListener(newValueEventListener() {
    @OverridepublicvoidonDataChange(DataSnapshot dataSnapshot) {
        for (DataSnapshotchildSnapshot: dataSnapshot.getChildren()) {
            String val=childSnapshot.getValue(String.class);
            arrayList.add(val);
        }
    }

    @OverridepublicvoidonCancelled(DatabaseError databaseError) {
        throw databaseError.toException(); // don't ignore errors
    }
});

The second approach tells Firebase to handle the list in its SDK and surfaces each child:

myRef=database.getReference().child("events/events"); // note the change in path

myRef.addChildEventListener(newChildEventListener() {
    @OverridepublicvoidonChildAdded(DataSnapshot dataSnapshot, String previousChildKey) {
        String val=dataSnapshot.getValue(String.class);
        arrayList.add(val);
    }

    ...
});