我如何提出这个要求

Question

What I had: An application that when you opened, it showed you a map with 3 buttons that said, "Restaurant", "Hospitals","Bars", and once clicked one of them they showed you this places nearby

What I have: For aesthetic questions an app that when you open, it shows you a RecyclerView with images, and when you click one of these images takes you to a map with your current position.

What I want: That when I click on one of the images of the RecyclerView for example Restaurants, it show a map with the restaurants near me, but making this request from the OnClickListener that I have in my RecyclerView's Adapter on the OnBindViewHolder() method

My Question: How do I make this request if the elements such as Latitude and Longitude are in another Activity and also within a Method called OnMapReady () in which I used to make the request with the buttons I had initially. Please I would appreciate the answers with code examples, I am still not very good at programming and there are millions of terms that I do not understand, thanks in advance

My RecyclerView and where I want to make the request

 @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, final int position) {
        holder.etiNombre.setText(listalugares.get(position).getNombre());
        holder.foto.setImageResource(listalugares.get(position).getFoto());

        holder.foto.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (position == 0){
                    Intent myIntent = new Intent(context, MapsActivity.class);
                    context.startActivity(myIntent);

                }
            }
        });
    }

Where I used to make my request

@Override
    public void onMapReady(GoogleMap googleMap) {//esta funcion es llamada cuando el mapa esta listo para usarse(1- locacion)
        mMap = googleMap;
        mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);//esto es lo que que dice de que forma queremos que se vea el mapa

        //Initialize Google Play Services
        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (ContextCompat.checkSelfPermission(this,
                    Manifest.permission.ACCESS_FINE_LOCATION)
                    == PackageManager.PERMISSION_GRANTED) {
                buildGoogleApiClient();
                mMap.setMyLocationEnabled(true);
            }
        }
        else {
            buildGoogleApiClient();
            mMap.setMyLocationEnabled(true);
        }
        Button btnRestaurant = (Button) findViewById(R.id.btnRestaurant);
        btnRestaurant.setOnClickListener(new View.OnClickListener() {
            String Restaurant = "restaurant";
            @Override
            public void onClick(View v) {
                Log.d("onClick", "Button is Clicked");
                mMap.clear();
                String url = getUrl(latitude, longitude, Restaurant);
                Object[] DataTransfer = new Object[2];
                DataTransfer[0] = mMap;
                DataTransfer[1] = url;
                Log.d("onClick", url);
                GetNearbyPlacesData getNearbyPlacesData = new GetNearbyPlacesData();
                getNearbyPlacesData.execute(DataTransfer);
                Toast.makeText(MapsActivity.this,"Nearby Restaurants", Toast.LENGTH_LONG).show();
            }
        });

Answer 1

To pass data from an activity to another, you'll have to use Intent 's extras field. It's a Bundle (a key/value data-structure) where you can store everything you want (with size constraints, so it's usually a good idea to pass only IDs or stuff like that, not the actual data).

What you can do here is: in your adapter's onClick method, add an extra field to the Intent , containing the information type you want to display (either restaurant, bar or hospital). Then, in your second activity (the one containing the map), in the onCreate method, read the field from the Intent . Then you can still place your Nearby Places request in the onMapReady method, using the field to determine which type you're requesting, instead of depending on a specific button click event.