// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.


package com.example.mapdemo;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentTransaction;

/**
 * Demonstrates how to instantiate a SupportMapFragment programmatically and add a marker to it.
 */
public class ProgrammaticDemoActivity extends AppCompatActivity implements OnMapReadyCallback {

    private static final String MAP_FRAGMENT_TAG = "map";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // It isn't possible to set a fragment's id programmatically so we set a tag instead and
        // search for it using that.
        SupportMapFragment mapFragment = (SupportMapFragment)
                getSupportFragmentManager().findFragmentByTag(MAP_FRAGMENT_TAG);

        // We only create a fragment if it doesn't already exist.
        if (mapFragment == null) {
            // To programmatically add the map, we first create a SupportMapFragment.
            mapFragment = SupportMapFragment.newInstance();

            // Then we add it using a FragmentTransaction.
            FragmentTransaction fragmentTransaction =
                    getSupportFragmentManager().beginTransaction();
            fragmentTransaction.add(android.R.id.content, mapFragment, MAP_FRAGMENT_TAG);
            fragmentTransaction.commit();
        }
        mapFragment.getMapAsync(this);
    }

    @Override
    public void onMapReady(GoogleMap map) {
        map.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
    }
}
