user7575308 user7575308 -4 years ago 133
Java Question

Find all match in firebase real time database

Hello please I need search in database in firebase all appearance with one parameter and write it on display or save in object. (if save in object I can process it)

My database looking

My data

And i need get all match mDatabaseReference.child("horse").child(kon.getUid()).child("plemeno") with "Hnedy"

and save somewhere. or process write on display and search second.

I don't know why...

Thanks.

If I need run over all database for search or it's simply here.

Please give me all advice I select best for me.

If you need more info please write, but I don't know how you need.

..I would not know what to say

////////////////////////////////////////////////

for first I write on display all databse with thise code..

private void addEventFirebaseListener() {
//Progressing
circular_progress.setVisibility(View.VISIBLE);
list_data.setVisibility(View.INVISIBLE);

mDatabaseReference.child("horse").addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if(list_kone.size() > 0)
list_kone.clear();
for(DataSnapshot postSnapshot:dataSnapshot.getChildren()){
Kon kon = postSnapshot.getValue(Kon.class);
list_kone.add(kon);
}
ListViewAdapter adapter = new ListViewAdapter(All.this,list_kone);
list_data.setAdapter(adapter);

circular_progress.setVisibility(View.INVISIBLE);
list_data.setVisibility(View.VISIBLE);
}

@Override
public void onCancelled(DatabaseError databaseError) {

}
});
}


but I thing so it's no important for search

Answer Source

Try this:

mDatabaseReference.child("horse").orderByChild("plemeno").equalTo("Hnedy").addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) { 
            // retrieve the data into an object: yourDataObject here
            if (cenaFilter && yourDataObject.getCena().equals("100")) {
               // RETRIEVE DATA
            }
        }

        @Override
        public void onCancelled(FirebaseError firebaseError) {

        }
    });

Here cenaFilter is a boolean which equals to true if the user has selected this specific filter, false otherwise

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