在应用页面上绘制位置坐标

Question

我正在尝试在我的应用中添加一个功能，如下所示： 我想获取用户的坐标（来自 GPS）并在空白地图上显示用户，没有任何街道/建筑物或任何地图视图，只是一个空白页面，例如用户将显示在页面的中心和其他保存的位置坐标将在页面上相对于用户进行标记。 例如，如果用户停留在坐标 并且标记在他以北 5 米处，那么我想将用户显示在页面中心，并且标记将在应用程序上向他显示.

Answer 1

您可以使用谷歌地图。它使您可以获取用户位置，而且您也可以在地图上标记已保存的用户位置。查看this 教程。

您可以使用地图向导here 使用自定义谷歌地图创建空白地图。我通过将道路、标签和地标的密度设置为零来创建一张空白地图。然后你要做的就是去更多选项>所有>几何并禁用它。

这是您可以用来在您的应用程序中创建空白地图的 json，它是我从 google 地图样式向导创建的。

[
  {
    "elementType": "geometry",
    "stylers": [
      {
        "color": "#1d2c4d"
      },
      {
        "visibility": "off"
      }
    ]
  },
  {
    "elementType": "labels",
    "stylers": [
      {
        "visibility": "off"
      }
    ]
  },
  {
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#8ec3b9"
      }
    ]
  },
  {
    "elementType": "labels.text.stroke",
    "stylers": [
      {
        "color": "#1a3646"
      }
    ]
  },
  {
    "featureType": "administrative",
    "elementType": "geometry",
    "stylers": [
      {
        "visibility": "off"
      }
    ]
  },
  {
    "featureType": "administrative.country",
    "elementType": "geometry.stroke",
    "stylers": [
      {
        "color": "#4b6878"
      }
    ]
  },
  {
    "featureType": "administrative.land_parcel",
    "stylers": [
      {
        "visibility": "off"
      }
    ]
  },
  {
    "featureType": "administrative.land_parcel",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#64779e"
      }
    ]
  },
  {
    "featureType": "administrative.neighborhood",
    "stylers": [
      {
        "visibility": "off"
      }
    ]
  },
  {
    "featureType": "administrative.province",
    "elementType": "geometry.stroke",
    "stylers": [
      {
        "color": "#4b6878"
      }
    ]
  },
  {
    "featureType": "landscape.man_made",
    "elementType": "geometry.stroke",
    "stylers": [
      {
        "color": "#334e87"
      }
    ]
  },
  {
    "featureType": "landscape.natural",
    "elementType": "geometry",
    "stylers": [
      {
        "color": "#023e58"
      }
    ]
  },
  {
    "featureType": "poi",
    "stylers": [
      {
        "visibility": "off"
      }
    ]
  },
  {
    "featureType": "poi",
    "elementType": "geometry",
    "stylers": [
      {
        "color": "#283d6a"
      }
    ]
  },
  {
    "featureType": "poi",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#6f9ba5"
      }
    ]
  },
  {
    "featureType": "poi",
    "elementType": "labels.text.stroke",
    "stylers": [
      {
        "color": "#1d2c4d"
      }
    ]
  },
  {
    "featureType": "poi.park",
    "elementType": "geometry.fill",
    "stylers": [
      {
        "color": "#023e58"
      }
    ]
  },
  {
    "featureType": "poi.park",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#3C7680"
      }
    ]
  },
  {
    "featureType": "road",
    "stylers": [
      {
        "visibility": "off"
      }
    ]
  },
  {
    "featureType": "road",
    "elementType": "geometry",
    "stylers": [
      {
        "color": "#304a7d"
      }
    ]
  },
  {
    "featureType": "road",
    "elementType": "labels.icon",
    "stylers": [
      {
        "visibility": "off"
      }
    ]
  },
  {
    "featureType": "road",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#98a5be"
      }
    ]
  },
  {
    "featureType": "road",
    "elementType": "labels.text.stroke",
    "stylers": [
      {
        "color": "#1d2c4d"
      }
    ]
  },
  {
    "featureType": "road.highway",
    "elementType": "geometry",
    "stylers": [
      {
        "color": "#2c6675"
      }
    ]
  },
  {
    "featureType": "road.highway",
    "elementType": "geometry.stroke",
    "stylers": [
      {
        "color": "#255763"
      }
    ]
  },
  {
    "featureType": "road.highway",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#b0d5ce"
      }
    ]
  },
  {
    "featureType": "road.highway",
    "elementType": "labels.text.stroke",
    "stylers": [
      {
        "color": "#023e58"
      }
    ]
  },
  {
    "featureType": "transit",
    "stylers": [
      {
        "visibility": "off"
      }
    ]
  },
  {
    "featureType": "transit",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#98a5be"
      }
    ]
  },
  {
    "featureType": "transit",
    "elementType": "labels.text.stroke",
    "stylers": [
      {
        "color": "#1d2c4d"
      }
    ]
  },
  {
    "featureType": "transit.line",
    "elementType": "geometry.fill",
    "stylers": [
      {
        "color": "#283d6a"
      }
    ]
  },
  {
    "featureType": "transit.station",
    "elementType": "geometry",
    "stylers": [
      {
        "color": "#3a4762"
      }
    ]
  },
  {
    "featureType": "water",
    "elementType": "geometry",
    "stylers": [
      {
        "color": "#0e1626"
      }
    ]
  },
  {
    "featureType": "water",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#4e6d70"
      }
    ]
  }
]

这是示例代码。当你完成我在上面发布的谷歌地图教程（这篇文章的第一个链接）时，你就会知道这是关于什么的。

@Override
public void onMapReady(GoogleMap googleMap){
    MapStyleOptions style = MapStyleOptions.loadRawResourceStyle(this, R.raw.style_json);
    googleMap.setMapStyle(style);
}

祝你好运。