圆形图层映射框-在geojson(Java)中传递点数
我有这个问题,因为我制作了这样的地图,上面有点,比如说,但在我的例子中,我想在地图上用每个国家的人口数来表示这样的点。geojson文件应在每个坐标上多加一个属性“number”。可能吗?我在Android上用Java编写代码 编辑: 现在我的小点没有正确聚集。缩小后的紫色(5)和深蓝色(4)应给出带有9号的红色点。现在我得到了没有数字的蓝点(我知道我只计算点数,这就是为什么蓝色)圆形图层映射框-在geojson(Java)中传递点数,java,android,mapbox,points,Java,Android,Mapbox,Points,我有这个问题,因为我制作了这样的地图,上面有点,比如说,但在我的例子中,我想在地图上用每个国家的人口数来表示这样的点。geojson文件应在每个坐标上多加一个属性“number”。可能吗?我在Android上用Java编写代码 编辑: 现在我的小点没有正确聚集。缩小后的紫色(5)和深蓝色(4)应给出带有9号的红色点。现在我得到了没有数字的蓝点(我知道我只计算点数,这就是为什么蓝色) 公共类CovidMapFragment扩展片段实现CovidMapContract.View{ 私有地图视图;
公共类CovidMapFragment扩展片段实现CovidMapContract.View{
私有地图视图;
私有MapboxMap MapboxMap;
私人活动;
私人CovidMapPresenter;
@凌驾
公共void-onAttach(上下文){
super.onAttach(上下文);
活动=(MainActivity)上下文;
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
getInstance(活动,getString(R.string.Mapbox\u访问\u令牌));
视图=充气机。充气(R.layout.fragment\u图,容器,假);
返回视图;
}
@凌驾
已创建视图上的公共void(视图,捆绑保存状态){
super.onViewCreated(视图,savedInstanceState);
mapView=activity.findViewById(R.id.mapView);
onCreate(savedInstanceState);
getMapAsync(新的OnMapReadyCallback(){
@凌驾
mapready上的公共无效(@NonNull MapboxMap-map){
mapboxMap=map;
map.setStyle(Style.LIGHT,new Style.OnStyleLoaded(){
@凌驾
已加载的公共void onstyled(@NonNull Style){
setTransition(新的TransitionOptions(0,0,false));
mapboxMap.animateCamera(CameraUpdateFactory.newLatLngZoom(新LatLng(
51.919438, 19.145136), 3));
addClusteredGeoJsonSource(样式);
style.addImage(
“交叉图标id”,
Objects.requirennull(BitmapUtils.getBitmapFromDrawable(getResources().getDrawable(R.drawable.ic_circle)),
真的
);
Toast.makeText(活动,R.string.app_名称,
吐司。长度(短)。show();
}
});
}
});
}
私有void addClusteredGeoJsonSource(@NonNull Style loadedMapStyle){
试一试{
loadedMapStyle.addSource(
新GeoJsonSource(“地震”,
新URI(“asset://earthquakes.geojson"),
新地理选项()
.withCluster(真)
.使用ClusterMaxZoom(14)
.带群集半径(50)
)
);
}捕获(URISyntaxException URISyntaxException){
e(“检查URL%s”,uriSyntaxException.getMessage());
}
SymbolLayer unclustered=新SymbolLayer(“未聚集点”、“地震”);
unclustered.setProperties(
图标图像(“交叉图标id”),
意识到(
分部(
获取(“案例”),文字(4.0f)
)
),
iconColor(
插值(指数(1),获取(“案例”),
停止(2.0,rgb(0,255,0)),
停止(4,rgb(0,0,255)),
停止(7.0,rgb(255,0,0))
)
)
);
未聚集。setFilter(有(“案例”);
loadedMapStyle.addLayer(未聚集);
int[][]层=新int[][]{
新的int[]{7,ContextCompat.getColor(activity.getApplicationContext(),R.color.red)},
新的int[]{4,ContextCompat.getColor(activity.getApplicationContext(),R.color.green)},
新int[]{0,ContextCompat.getColor(activity.getApplicationContext(),R.color.blue)}
};
对于(int i=0;ipublic class CovidMapFragment extends Fragment implements CovidMapContract.View {
private MapView mapView;
private MapboxMap mapboxMap;
private MainActivity activity;
private CovidMapPresenter presenter;
@Override
public void onAttach(Context context) {
super.onAttach(context);
activity = (MainActivity) context;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Mapbox.getInstance(activity, getString(R.string.mapbox_access_token));
View view = inflater.inflate(R.layout.fragment_map, container, false);
return view;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mapView = activity.findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(@NonNull MapboxMap map) {
mapboxMap = map;
map.setStyle(Style.LIGHT, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
style.setTransition(new TransitionOptions(0, 0, false));
mapboxMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(
51.919438, 19.145136), 3));
addClusteredGeoJsonSource(style);
style.addImage(
"cross-icon-id",
Objects.requireNonNull(BitmapUtils.getBitmapFromDrawable(getResources().getDrawable(R.drawable.ic_circle))),
true
);
Toast.makeText(activity, R.string.app_name,
Toast.LENGTH_SHORT).show();
}
});
}
});
}
private void addClusteredGeoJsonSource(@NonNull Style loadedMapStyle) {
try {
loadedMapStyle.addSource(
new GeoJsonSource("earthquakes",
new URI("asset://earthquakes.geojson"),
new GeoJsonOptions()
.withCluster(true)
.withClusterMaxZoom(14)
.withClusterRadius(50)
)
);
} catch (URISyntaxException uriSyntaxException) {
Timber.e("Check the URL %s", uriSyntaxException.getMessage());
}
SymbolLayer unclustered = new SymbolLayer("unclustered-points", "earthquakes");
unclustered.setProperties(
iconImage("cross-icon-id"),
iconSize(
division(
get("cases"), literal(4.0f)
)
),
iconColor(
interpolate(exponential(1), get("cases"),
stop(2.0, rgb(0, 255, 0)),
stop(4, rgb(0, 0, 255)),
stop(7.0, rgb(255, 0, 0))
)
)
);
unclustered.setFilter(has("cases"));
loadedMapStyle.addLayer(unclustered);
int[][] layers = new int[][] {
new int[] {7, ContextCompat.getColor(activity.getApplicationContext(), R.color.red)},
new int[] {4, ContextCompat.getColor(activity.getApplicationContext(), R.color.green)},
new int[] {0, ContextCompat.getColor(activity.getApplicationContext(), R.color.blue)}
};
for (int i = 0; i < layers.length; i++) {
CircleLayer circles = new CircleLayer("cluster-" + i, "earthquakes");
circles.setProperties(
circleColor(layers[i][1]),
circleRadius(18f)
);
Expression pointCount = toNumber(get("point_count"));
circles.setFilter(
i == 0
? all(has("point_count"),
gte(pointCount, literal(layers[i][0]))
) : all(has("point_count"),
gte(pointCount, literal(layers[i][0])),
lt(pointCount, literal(layers[i - 1][0]))
)
);
loadedMapStyle.addLayer(circles);
}
SymbolLayer count = new SymbolLayer("count", "earthquakes");
count.setProperties(
//textField(Expression.toString(get("point_count"))),
textField(Expression.toString(get("cases"))),
textSize(12f),
textColor(Color.WHITE),
textIgnorePlacement(true),
textAllowOverlap(true)
);
loadedMapStyle.addLayer(count);
}
@Override
public void onStart() {
super.onStart();
mapView.onStart();
}
@Override
public void onResume() {
super.onResume();
mapView.onResume();
}
@Override
public void onPause() {
super.onPause();
mapView.onPause();
}
@Override
public void onStop() {
super.onStop();
mapView.onStop();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
@Override
public void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
@Override
public void showMessage(String message) {
System.out.println("Fragment");
}
}