CODEWITHSUNDEEP
javaandroidfirebaselistviewfirebase-realtime-database
Cyb3rKo
Cyb3rKo

Reputation: 464

ListView onClick to get Firebase data

I managed to get data from the Firebase Database and show it in an alphabetical order in my ListView.

Now I want to show the value from my database, if I click on an item in the ListView. As an example in my database it says "BB" as a name and the value is "Bye, bye".

So after an onClick event in the ListView a Toast message should show the value. How can I do this?

Here´s my database:

Database

ListView

Upvotes: 2

Views: 1928

Answers (2)

Cyb3rKo
Cyb3rKo

Reputation: 464

The sample code 'Peter Haddad' provided in his answer basically works fine... IF you design your database in a better way I did back then.
If you use his code, you get the value of the database entry (so the text on the right side in the console database, but I wanted to get the left one.

I recommend using a structure like in the Firebase Docs about Structuring.
It could look something like this:

enter image description here

Here are two posts about searching and querying those kind of databases:

If you anyways want to do it in the way I tried, it`s possible:

In the sample code from 'Peter Haddad' simply replace dataSnapshot.child(selectedFromList).getValue().toString() with dataSnapshot.child(selectedFromList).getKey().toString().

The key represents the text on the left side of the console database structure.

Upvotes: 1

Peter Haddad
Peter Haddad

Reputation: 80924

To show the value after you click on an item:

DatabaseReference ref=FirebaseDatabase.getInstance().getReference();
 listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, final int position, long id) {
            final String selectedFromList = (String) list.getItemAtPosition(position);

            ref.orderByChild(selectedFromList).addListenerForSingleValueEvent(new ValueEventListener() {
                @Override
                public void onDataChange(DataSnapshot dataSnapshot) {
                 String retrievedValue=dataSnapshot.child(selectedFromList).getValue().toString();
                 Toast.makeText(activity_name.this, "Value: "+retrievedValue, Toast.LENGTH_LONG).show();

                }

                @Override
                public void onCancelled(DatabaseError databaseError) {

                }
            });

Assuming you have a listview with the following:

Afk
MFG

After clicking on an item, get the item at that postion and use it in a query orderByChild and retrieve it's value.

Upvotes: 2

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