Android地图应用新视界--mapbox的应用开发之简单功能提取篇

• Mapbox Streets：我们的标志性风格。阅读博客文章以获得更多关于这种风格的移动具体考虑。
• Emerald：大交通和户外地形。了解更多有关数据源。
• Light and Dark：轻型和深色风格，是伟大的数据覆盖。用他们日夜模式，底图明亮数据之上，而更多。
• Satellite and Satellite Streets：最好看，最准确，最先进最新的卫星图像提供的任何地方。看看我们的博客了解最新信息，我们最先进的技术和数据。
• Hybrid：混合型 不显眼的标签，上面的卫星式的，便于寻路的道路。
• 置换方式
  
  mapView.setStyle(Style.MAPBOX_STREETS);
  
  mapboxMap.setStyleUrl(Style.SATELLITE_STREETS);
  
  ---------------------------------------------------------------------------------------------
  下载mapbox-光栅v8.json，打开它，取代mapbox.streets你userid.mapid，并将其添加到您的应用程序的资产目录或文件上传到服务器
  
  这种技术可以加载任何自定义样式的JSON符合Mapbox GL样式规格
  

  mapView.setStyleUrl("https://www.mapbox.com/android-sdk/files/mapbox-raster-v8.json");

  
  
  
  

         
// When user clicks the map, animate to new camera location
mapboxMap.setOnMapClickListener(new MapboxMap.OnMapClickListener() {
@Override
public void onMapClick(@NonNull LatLng point) {
                        CameraPosition position = new CameraPosition.Builder()
.target(new LatLng(51.50550, -0.07520)) // Sets the new camera position
.zoom(17) // Sets the zoom
.bearing(180) // Rotate the camera
.tilt(30) // Set the camera tilt
.build(); // Creates a CameraPosition from the builder
                        mapboxMap.animateCamera(CameraUpdateFactory
.newCameraPosition(position), 7000);
}
});
边界包含poi兴趣点/标记点
@Override
public void onMapReady(final MapboxMap mapboxMap) {
final Marker marker1 = mapboxMap.addMarker(new MarkerOptions().position(new LatLng(-36.848380, 174.762275)).title("Sky Tower"));
final Marker marker2 = mapboxMap.addMarker(new MarkerOptions().position(new LatLng(-36.847179, 174.777072)).title("Vector Arena"));
final Marker marker3 = mapboxMap.addMarker(new MarkerOptions().position(new LatLng(-36.801887, 175.108709)).title("Waiheke Island"));
final Marker marker4 = mapboxMap.addMarker(new MarkerOptions().position(new LatLng(-36.835059, 174.691237)).title("Waitemata Harbour"));
// When user clicks the map, animate to new camera location
mapboxMap.setOnMapClickListener(new MapboxMap.OnMapClickListener() {
@Override
public void onMapClick(@NonNull LatLng point) {
LatLngBounds latLngBounds = new LatLngBounds.Builder()
.include(marker1.getPosition())
.include(marker2.getPosition())
.include(marker3.getPosition())
.include(marker4.getPosition())
.build();
mapboxMap.moveCamera(CameraUpdateFactory.newLatLngBounds(latLngBounds, 50));
}
});
}

new DrawGeoJSON().execute();

private class DrawGeoJSON extends AsyncTask<Void, Void, List<LatLng>> {

@Override
protected List<LatLng> doInBackground(Void... voids) {
ArrayList<LatLng> points = new ArrayList<>();
try {
// Load GeoJSON file
InputStream inputStream = getAssets().open("example.geojson");
BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream, Charset.forName("UTF-8")));
StringBuilder sb = new StringBuilder();
int cp;
while ((cp = rd.read()) != -1) {
sb.append((char) cp);
}
inputStream.close();
// Parse JSON
JSONObject json = new JSONObject(sb.toString());
JSONArray features = json.getJSONArray("features");
JSONObject feature = features.getJSONObject(0);
JSONObject geometry = feature.getJSONObject("geometry");
if (geometry != null) {
String type = geometry.getString("type");
// Our GeoJSON only has one feature: a line string
if (!TextUtils.isEmpty(type) && type.equalsIgnoreCase("LineString")) {
// Get the Coordinates
JSONArray coords = geometry.getJSONArray("coordinates");
for (int lc = 0; lc < coords.length(); lc++) {
JSONArray coord = coords.getJSONArray(lc);
LatLng latLng = new LatLng(coord.getDouble(1), coord.getDouble(0));
points.add(latLng);
}
}
}
} catch (Exception e) {
Log.e(TAG, "Exception Loading GeoJSON: " + e.toString());
}
return points;
}
@Override
protected void onPostExecute(List<LatLng> points) {
super.onPostExecute(points);
if (points.size() > 0) {
LatLng[] pointsArray = points.toArray(new LatLng[points.size()]);
// Draw Points on MapView
mapboxMap.addPolyline(new PolylineOptions()
.add(pointsArray)
.color(Color.parseColor("#3bb2d0"))
.width(2));
}
}
}
画一个图形图层
private void drawPolygon(MapboxMap mapboxMap) {
List<LatLng> polygon = new ArrayList<>();
polygon.add(new LatLng(45.522585, -122.685699));
polygon.add(new LatLng(45.534611, -122.708873));
polygon.add(new LatLng(45.530883, -122.678833));
polygon.add(new LatLng(45.547115, -122.667503));
polygon.add(new LatLng(45.530643, -122.660121));
polygon.add(new LatLng(45.533529, -122.636260));
polygon.add(new LatLng(45.521743, -122.659091));
polygon.add(new LatLng(45.510677, -122.648792));
polygon.add(new LatLng(45.515008, -122.664070));
polygon.add(new LatLng(45.502496, -122.669048));
polygon.add(new LatLng(45.515369, -122.678489));
polygon.add(new LatLng(45.506346, -122.702007));
polygon.add(new LatLng(45.522585, -122.685699));
        mapboxMap.addPolygon(new PolygonOptions()
.addAll(polygon)
.fillColor(Color.parseColor("#3bb2d0")));
}