如何从Firebase读取数据并在autocomplectetextView中填充它

Question

如何从firebase读取数据（纬度和逻辑）并在autocomplectetextView中填充它 如何访问此数据data.features.properties.adress，如下图所示

database structure

这是我的json文件的一部分

 "features": [
      {
         "type": "Feature",
         "properties": {
            "x": 17.254,
            "y": 20.424,
            "adress": "123 rue test"
         },
         "geometry": {
            "type": "Polygon",
            "coordinates": [
               [
                  [
                     17.73,
                     2.81,
                     1.88
                  ],
                  [
                     17.906,
                     20.661,
                     1.88
                  ],
                  [
                     17.95,
                     20.27,
                     1.88
                  ],
                  [
                     17.01,
                     20.1832277507,
                     1.88
                  ],
                  [
                     17.73,
                     20.81,
                     1.88
                  ]
               ]
            ]
         }
      }]

我已经尝试过这段代码，但它什么都没给我，我不知道是什么问题

featRef.child("features/properties/adress");

    featRef.addValueEventListener(new com.firebase.client.ValueEventListener() {
        @Override
        public void onDataChange(com.firebase.client.DataSnapshot dataSnapshot) {
            for(com.firebase.client.DataSnapshot adress : dataSnapshot.getChildren()){
                Log.i("adress", adress.getValue().toString()+"///////////////////////////////////////////////////////");
                autoComplete.add(adress.getValue().toString());
            }
            ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(MapsActivity.this, android.R.layout.select_dialog_item, autoComplete);
            autoTextView.setAdapter(arrayAdapter);
        }

        @Override
        public void onCancelled(FirebaseError firebaseError) {

        }
    });