Question

所以我要做的是当用户点击谷歌地图标记时，活动将显示将显示该标记内的所有信息。但问题是，所有标记都显示相同的结果（这是我的parse.com数据库第一行中的项目）。我目前正在使用Xamarin进行开发。我会感激任何答案。先谢谢你们。

public async void getGeoPoint(){
        string getPlaceName, getPlacePrice, getPlaceAddress, getOwnerContact,   getRentalType, getOwnerName;

        string xx = autoCompleteTextView.Text;
        ParseQuery<ParseObject> query = ParseObject.GetQuery ("Rentals")
        .WhereEqualTo ("rentalCity", xx);
        IEnumerable<ParseObject> results = await query.FindAsync ();

        foreach(var temp in results){
             getLatitude = temp.Get<double> ("rentalLatitude");
             getLongitude = temp.Get<double> ("rentalLongitude");
            getPlaceName = temp.Get<string> ("rentalName");
             getPlacePrice = temp.Get<string> ("rentalPrice");
             getPlaceAddress = temp.Get<string> ("rentalFullAddress");
             getOwnerContact = temp.Get<string> ("ownerContactNo");
             getRentalType = temp.Get<string> ("rentalType");
             getOwnerName = temp.Get<string> ("ownerName");
            myMarker = map.AddMarker(new MarkerOptions()
                .SetPosition(new LatLng(getLatitude, getLongitude))
                .SetIcon(BitmapDescriptorFactory.FromResource(Resource.Drawable.edimeow))
                );
        }

        map.MarkerClick += (object sender, GoogleMap.MarkerClickEventArgs e) => {
            string selected = getPlaceName;
            var passToRentalProfile = new Intent (this, typeof(HostRentalProfileList));
            passToRentalProfile.PutExtra ("selected", selected);
            StartActivity (passToRentalProfile);
            this.Finish();
        };


        btnList.Click += (object sender, EventArgs e) => {
            var passToUserList = new Intent (this, typeof(UserListMode));
            passToUserList.PutExtra("arrData", xx);
            StartActivity(passToUserList);
            this.Finish();
        };

    }//getGeoPoint

Answer 1

在foreach循环中，您枚举所有返回的结果，当您在不同的地理位置添加新地图标记时，您不会在添加的标记中存储任何其他详细信息。< / p>

随后，当您枚举下一个结果时，将本地变量重置为新信息。

您的map.MarkerClick是任何地图标记点击的通用处理程序。

您尝试引用之前设置的getPlaceName，并且始终等于结果中的最后一项。

您需要将这些结果存储在某个集合中，并将一些ID添加到创建的地图标记中，这样您可以在点击地图标记时返回原始结果。

Answer 2

我有类似的东西，我需要在单击标记时显示自定义消息，我将其存储在字典中，然后存储在GoogleMap.IOnMarkerClickListener上，它将传递已单击的标记。

公共类MarkerManager：Java.Lang.Object，GoogleMap.IOnMarkerClickListener {

private readonly GoogleMap _map;

private Dictionary<Marker, int> _markerDictionary;

 public MarkerManager(GoogleMap map, BaseActivity activity)
    {
        _activity = activity;
        _map = map;
        _markerDictionary = new Dictionary<Marker, int>();
    }


    public void AddMarkerCallback(LatLng position, string title, string bodyText, int? icon, Action<int, Marker> callback,
        bool draggable = false, int id = 0)
    {
        var markerOptions = new MarkerOptions();
        markerOptions.SetPosition(position);
        markerOptions.SetTitle(title);
        markerOptions.SetSnippet(bodyText);
        markerOptions.Draggable(draggable);

        CallBack = callback;

        if (icon.HasValue)
        {
            markerOptions.InvokeIcon(BitmapDescriptorFactory.FromResource(icon.Value));
        }

        var marker = _map.AddMarker(markerOptions);
        _markerDictionary.Add(marker, id);

        _map.SetOnMarkerClickListener(this);
    }

    public void ClearMap()
    {
        if(_map != null)
        _map.Clear();

        _markerDictionary = new Dictionary<Marker, int>();
    }


    public bool OnMarkerClick(Marker p0)
    {
        p0.ShowInfoWindow();

        Console.WriteLine("maker click");

        HideMarkerAfterTime(p0);

        foreach (var i in _markerDictionary)
        {
            if (!i.Key.Equals(p0)) continue;
            if (CallBack == null) return true;

            SeletedMarkerId = i.Value;
            CallBack(i.Value, p0);
            return true;
        }

        if (CallBackLocation != null)
            CallBackLocation(p0.Position);

        return false;
    }


    /// <summary>
    /// The timer
    /// </summary>
    private System.Timers.Timer _timer;

    /// <summary>
    /// Hides the marker after time.
    /// </summary>
    /// <param name="p0">The p0.</param>
    /// <param name="miliSeconds">The mili seconds.</param>
    private void HideMarkerAfterTime(Marker p0, double miliSeconds = 3000)
    {
        //need to clean down timer object. if i click on another
        //icon wierd things happen
        if (_timer != null) _timer.Dispose();

        _timer = new System.Timers.Timer { Interval = miliSeconds };
        _timer.Start();
        _timer.Elapsed += (sender, args) => _activity.RunOnUiThread(() =>
        {
            p0.HideInfoWindow();
            _timer.Stop();
        });
    }
}

Xamarin Android - 谷歌地图标记总是显示相同的信息

2 个答案: