How can I load an AutoCompleteTextView from a list of Firebase data?

问题

If I want to load a list of data into an AutoCompleteTextView in android from Firebase, how will I do that?

How I'd imagine it:

I get the data using something similar to a FirebaseRecyclerAdapter, and set that adapter to the ACTV. For example, if I have this data:

AutoComplete:{
  JKDJKADJKADFJAKD:{
      name:"Hakuna Matata , your orangeness -- I mean your highness, Mr. Trump!"
   }
  JDKIKSLAIJDKDIKA:{
      name:"Hakuna Matata! I ask not to take offense by the previous statement."
   }
}

The ACTV should have both statements as suggestions when I type in "Hakuna Matata". Is there any special Firebase adapter for this?

回答1:

After 6 hours of research, I finally did it thanks to this link.

Here's my database: Follow the comments in the following code to achieve what I needed:

//Nothing special, create database reference.
    DatabaseReference database = FirebaseDatabase.getInstance().getReference();
    //Create a new ArrayAdapter with your context and the simple layout for the dropdown menu provided by Android
    final ArrayAdapter<String> autoComplete = new ArrayAdapter<>(this,android.R.layout.simple_list_item_1);
    //Child the root before all the push() keys are found and add a ValueEventListener()
    database.child("AutoCompleteOptions").addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            //Basically, this says "For each DataSnapshot *Data* in dataSnapshot, do what's inside the method.
            for (DataSnapshot suggestionSnapshot : dataSnapshot.getChildren()){
                //Get the suggestion by childing the key of the string you want to get.
                String suggestion = suggestionSnapshot.child("suggestion").getValue(String.class);
                //Add the retrieved string to the list
                autoComplete.add(suggestion);
            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });
    AutoCompleteTextView ACTV= (AutoCompleteTextView)findViewById(R.id.actv);
    ACTV.setAdapter(autoComplete);

来源：https://stackoverflow.com/questions/38719402/how-can-i-load-an-autocompletetextview-from-a-list-of-firebase-data