如何从android中的kml文件获取数组点 [英] How to get arraypoints from kml file in android
本文介绍了如何从android中的kml文件获取数组点的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有kml文件，并使用 KmlLayer 类在我的地图中显示它。 （这是一个显示在地图中的多边形形状）
现在我需要检查用户位置是否在多边形中。
如何获得多边形的坐标并检查用户是否在？
这是mapActivity
public class MapsActivity扩展FragmentActivity实现的OnMapReadyCallback，LocationListener {
私有GoogleMap mMap;
私人LocationManager管理器;
私人双拉特，lng;
私有KmlLayer图层;
@Override
protected void onCreate（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）;
setContentView（R.layout.activity_maps）;
//获取SupportMapFragment并在地图准备好使用时得到通知。
SupportMapFragment mapFragment =（SupportMapFragment）getSupportFragmentManager（）
.findFragmentById（R.id.map）;
mapFragment.getMapAsync（this）;
manager =（LocationManager）getSystemService（LOCATION_SERVICE）; （）;
}
@Override
保护无效onResume（）{
super.onResume（）;
字符串提供者= LocationManager.GPS_PROVIDER;
尝试{
manager.requestLocationUpdates（provider，1000，100，this）;
} catch（SecurityException e）{
}
}
@Override
public void onMapReady（GoogleMap googleMap）{
mMap = googleMap;
$ b @覆盖
public void onLocationChanged（位置位置）{
//在用户位置添加一个标记
mMap.clear（）;
尝试{
layer = new KmlLayer（mMap，R.raw.polygon_layer，this）;
layer.addLayerToMap（）;
} catch（IOException e）{
e.printStackTrace（）;
} catch（XmlPullParserException e）{
e.printStackTrace（）;
}
lat = location.getLatitude（）;
ng = location.getLongitude（）;
LatLng userLocation = new LatLng（lat，lng）;
mMap.addMarker（new MarkerOptions（）。position（userLocation）.title（you are here））;
mMap.animateCamera（CameraUpdateFactory.newLatLngZoom（userLocation，15））;
/////做一些结果... /////
}
@Override
public void onStatusChanged（String provider，int status ，Bundle extras）{
}
@Override
public void onProviderEnabled（String provider）{
}
@Override
public void onProviderDisabled（String provider）{
code $ pre $
这是xml中的kml文件
<？xml version =1.0编码= UTF-8 >？;
< kml xmlns =http://www.opengis.net/kml/2.2xmlns：gx =http://www.google.com/kml/ext/2.2xmlns：kml = http://www.opengis.net/kml/2.2xmlns：atom =http://www.w3.org/2005/Atom>
<文件>
<名称>允许的区域.kml< /名称>
< Style id =s_ylw-pushpin_hl>
< IconStyle>
< scale> 1.3< / scale>
<图标>
< href> http：//maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png< / href>
< /图标>
< hotSpot x =20y =2xunits =pixelsyunits =pixels/>
< / IconStyle>
< / style>
< StyleMap id =m_ylw-pushpin>
< Pair>
< key>正常< / key>
< styleUrl>＃s_ylw-pushpin< / styleUrl>
< / Pair>
< Pair>
< key>突出显示< / key>
< styleUrl>＃s_ylw-pushpin_hl< / styleUrl>
< / Pair>
< / StyleMap>
< Style id =s_ylw-pushpin>
< IconStyle>
< scale> 1.1< / scale>
<图标>
< href> http：//maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png< / href>
< /图标>
< hotSpot x =20y =2xunits =pixelsyunits =pixels/>
< / IconStyle>
< / style>
<地标>
<名称>允许的区域< /名称>
< styleUrl>＃m_ylw-pushpin< / styleUrl>
< Polygon>
< tessellate> 1< / tessellate>
< outerBoundaryIs>
< LinearRing>
<坐标>
34.79991805485883,32.070779943443,0 34.799829164854,32.07080649750882,0 34.79971023480251,32.07083335300256,0 34.79959122858838,32.07086022634235,0 34.79947508289758,32.07091343448649,0 34.79935881388468,32.07096669690968,0 34.79923664471844,32.07096729415576,0 34.79912177286835,32.07104658864036,0 34.79897487097949,32.07112570720702,0 34.79888722467972 ，32.07117851366566,0 34.79874279960763,32.07128423680869,0 34.79859521904459,32.07136355322666,0 34.79847863488154,32.07144297230025,0 34.79836191935064,32.07152248079761,0 34.79824507343032,32.0716020779166,0 34.79815930685992,32.07168178041764,0 34.79804221359166,32.07176155720244,0 34.79795616172054,32.07184141068195,0 34.79780186844395,32.07186773731328,0 34.79771004064962 ，32.07189410373302,0 34.79755567970174,32.07192044177337,0 34.79737002328232,32.07194676924303,0 34.79727810620915,32.07197315444336,0 34.79715489998476,32.07199952999493,0 34.79703464286722,32.07205290681115,0 34.79691221087469,32.07207 970997565,0 34.79675876113444,32.07213229667552,0 34.79663616578725,32.0721590945553,0 34.7965158855734,32.07221272652451,0 34.79639416450348,32.07224005534155,0 34.79627182383982,32.0722671214403,0 34.79615136355047,32.07232087918774,0 34.79603111665515,32.07237484412778,0 34.79587977302003,32.07242903225671,0 34.79575748160032,32.07245637773539,0 34.79566802521082， 32.07251032888696,0 34.79554559731859,32.0725377149133,0 34.7953920225424,32.07256527306239,0 34.79526945233749,32.0725926876614,0 34.79511746292694,32.07264708033384,0 34.79499646538875,32.07270136187387,0 34.79484421345469,32.07275585259577,0 34.79469350541614,32.07283727044721,0 34.79454094840708,32.07289188109038,0 34.79445066170941,32.07294620859783,0 34.79429947907723， 32.07302786809845,0 34.79417935372582,32.07310945773398,0 34.79405908038837,32.07319114700508,0 34.79396995394126,32.07327275893679,0 34.79384894225318,32.07335428163514,0 34.79375984266765,32.07343628067046,0 34.79370429835355,32.0735459736907,0 34.7935 859422501,32.07368222179287,0 34.79352747616914,32.07376408535365,0 34.79343884580583,32.0738733516459,0 34.79338184365402,32.07398284753502,0 34.79329618372842,32.07414739357892,0 34.79323897373596,32.07425729258198,0 34.79321351678169,32.07436742867609,0 34.79315774177752,32.07450527183566,0 34.7931638907124,32.07461567862387,0 34.79313756341858,32.07472559651252,0 34.79308060933013,32.07488922871619,0 34.79308668160002,32.07502628954131,0 34.79306169465262,32.07519062337077,0 34.79306654712603,32.07530060450269,0 34.7930726226885,32.07543826193546,0 34.79307748970315,32.07554853348597,0 34.79308358050082,32.07568655516418,0 34.79312100317883,32.07579772781796,0 34.79312913357973,32.07596471974184,0 34.79320073097958,32.07610491366522,0 34.79324001895942,32.07624496040656,0 34.79331184498919,32.07638565505223,0 34.79338439099767,32.07652730316914,0 34.79348948121997,32.07666948095191,0 34.79356102661898,32.07678367363563,0 34.79363277125226,32.07689815246911,0 34.79373893916443,32.07 704173685054,0 34.7938780624815,32.07718612353797,0 34.79394685121213,32.07724411316636,0 34.7940845259789,32.07736014101853,0 34.7942478923755,32.07736197857023,0 34.79434418144339,32.07733449643025,0 34.79426962949542,32.0771904711012,0 34.79419157753938,32.07698960676555,0 34.79418286657731,32.07684741254325,0 34.79417208286176,32.07665030740839,0 34.79419705423733， 32.07651030455318,0 34.7943117016162,32.0763370055064,0 34.79455401995362,32.07613750896425,0 34.79507732694918,32.07582724175629,0 34.79569820277227,32.07560031244044,0 34.79641301741539,32.07540067696312,0 34.79671812423208,32.07525923733243,0 34.79748225018561,32.07497531079491,0 34.79790904184041,32.07478083399741,0 34.79821638657583,32.07467026816978,0 34.79843082137442， 32.07458750245045,0 34.79858377461076,32.07453211731625,0 34.79870506867704,32.07447686849413,0 34.79888439004131,32.07436670422536,0 34.79897891672719,32.07436642917416,0 34.80456863371455,32.07677736098206,0 34.80325305348363,32.08274279321805,0 34。 80114526065506,32.08251913159533,0 34.7989367189419,32.08176427089727,0 34.79689106024489,32.08073788341836,0 34.79496709037093,32.07958475554416,0 34.79338530277534,32.07829895286428,0 34.7921299991481,32.07665877832899,0 34.79192403865202,32.0763383042137,0 34.79124200995466,32.07505327258005,0 34.79073442377671,32.0738210151859,0 34.79051041161056,32.07323725668621,0 34.79204628706525,32.07302959330549,0 34.79245272972145,32.07270015175266,0 34.79245107794317,32.07265092435394,0 34.79247769467587,32.0710871628869,0 34.79223057128755,32.06931261051965,0 34.79176481038415,32.06790379237363,0 34.79070020423727,32.0662614853681,0 34.78878317579658,32.06475962751786,0 34.78715720473755,32.06306907146922,0 34.78611876597962,32.06156309442464,0 34.78530437871997,32.05935205019298,0 34.78939954851906,32.05930676237435,0 34.78939814232462,32.05666867110639,0 34.80026976529742,32.05646319471511,0 34.80019035465028,32.06112887667786,0 34.79906659112366,32.06429129374197,0 34.79991805485883,32。 070779943443,0
< / coordinates>
< / LinearRing>
< / outerBoundaryIs>
< / Polygon>
< /地标>
< / Document>
< / kml>
谢谢
解决方案 div> 您可以访问图层地标并获取它的几何图形。如果是多边形，则可以检查用户位置是否位于多边形内（考虑到多边形可能有孔，并且您需要检查该位置是否位于表示多边形不包含位置的孔上）。
检查位置是否位于文件的任何容器中的任何多边形内。
LatLng latLngTest; //要测试的位置。您将用您的用户位置初始化
List< KmlPolygon> polygonsInLayer = getPolygons（layer.getContainers（））;
boolean liesInside = liesOnPolygon（polygonsInLayer，latLngTest）;
私人列表< KmlPolygon> getPolygons（Iterable< KmlContainer>容器）{
List< KmlPolygon> polygons = new ArrayList<>（）;
if（containers == null）{
return polygons; （KmlContainer容器：容器）{
polygons.addAll（getPolygons（container））;
}
}
返回多边形;
}
私人列表< KmlPolygon> getPolygons（KmlContainer容器）{
List< KmlPolygon> polygons = new ArrayList<>（）;
if（container == null）{
return polygons;
}
可重用< KmlPlacemark> placemarks = container.getPlacemarks（）; （KMLPolymark）{
if（placemark！= null）{
（KmlPlacemark placemark：placemarks）{
if（placemark.getGeometry（）instanceof KmlPolygon）{
polygons.add（（KmlPolygon） placemark.getGeometry（））;
if（container.hasContainers（））{
polygons.addAll（getPolygons（container.getContainers（）））;
}
返回多边形;
private boolean liesOnPolygon（List< KmlPolygon> polygons，LatLng test）{
boolean lies = false;
if（polygons == null || test == null）{
return lies; （KmlPolygon多边形：多边形）{
}
if（liesOnPolygon（polygon，test））{
lies = true;
休息;
}
}
return lies;
}
private boolean liesOnPolygon（KmlPolygon polygon，LatLng test）{
boolean lies = false;
if（polygon == null || test == null）{
return lies;
}
//获取外边界并检查测试位置是否位于
ArrayList< LatLng> outerBoundary = polygon.getOuterBoundaryCoordinates（）;
lies = PolyUtil.containsLocation（test，outerBoundary，true）;
if（lies）{
//获取内部边界并检查测试位置是否在
内ArrayList< ArrayList< LatLng>> innerBoundaries = polygon.getInnerBoundaryCoordinates（）;
if（innerBoundaries！= null）{
for（ArrayList< LatLng> innerBoundary：innerBoundaries）{
//如果测试位置位于一个孔中，则该多边形不包含该位置
if（PolyUtil.containsLocation（test，innerBoundary，true））{
lies = false;
休息;
}
}
}
}
return lies;
}
I have kml file and I display it in my map with KmlLayer class. (it is a polygon shape that dispaly in the map)
Now I need to check if the user locaion is in the polygon or not.
how can i get the coordinates of the polygon and check if the user in it or not?
this is the mapActivity
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, LocationListener {
private GoogleMap mMap;
private LocationManager manager;
private double lat, lng;
private KmlLayer layer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
manager = (LocationManager) getSystemService(LOCATION_SERVICE);
}
@Override
protected void onResume() {
super.onResume();
String provider = LocationManager.GPS_PROVIDER;
try {
manager.requestLocationUpdates(provider, 1000, 100, this);
}catch (SecurityException e){
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
}
@Override
public void onLocationChanged(Location location) {
// Add a marker in user location
mMap.clear();
try {
layer = new KmlLayer(mMap, R.raw.polygon_layer, this);
layer.addLayerToMap();
} catch (IOException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
}
lat = location.getLatitude();
lng = location.getLongitude();
LatLng userLocation = new LatLng(lat , lng );
mMap.addMarker(new MarkerOptions().position(userLocation).title("you are here"));
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(userLocation, 15));
/////do somethig thith the results.../////
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}
this is the kml file in xml
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:kml="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom">
<Document>
<name>Allowed area.kml</name>
<Style id="s_ylw-pushpin_hl">
<IconStyle>
<scale>1.3</scale>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png</href>
</Icon>
<hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
</IconStyle>
</Style>
<StyleMap id="m_ylw-pushpin">
<Pair>
<key>normal</key>
<styleUrl>#s_ylw-pushpin</styleUrl>
</Pair>
<Pair>
<key>highlight</key>
<styleUrl>#s_ylw-pushpin_hl</styleUrl>
</Pair>
</StyleMap>
<Style id="s_ylw-pushpin">
<IconStyle>
<scale>1.1</scale>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png</href>
</Icon>
<hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
</IconStyle>
</Style>
<Placemark>
<name>Allowed area</name>
<styleUrl>#m_ylw-pushpin</styleUrl>
<Polygon>
<tessellate>1</tessellate>
<outerBoundaryIs>
<LinearRing>
<coordinates>
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</outerBoundaryIs>
</Polygon>
</Placemark>
</Document>
</kml>
thanks
解决方案 You can access the layer placemarks and get it's geometry. If it's a polygon, you can check if the user location lies inside the polygon (taking into account that a polygon may have holes and you need to check if the location lies on a hole which implies that the polygon does not contain the location).
Checking whether the location lies inside any polygon in any container of the file recursively.
LatLng latLngTest; // The location to test. You will initialize it with your user's location
List<KmlPolygon> polygonsInLayer = getPolygons(layer.getContainers());
boolean liesInside = liesOnPolygon(polygonsInLayer, latLngTest);
private List<KmlPolygon> getPolygons(Iterable<KmlContainer> containers) {
List<KmlPolygon> polygons = new ArrayList<>();
if (containers == null) {
return polygons;
}
for (KmlContainer container : containers) {
polygons.addAll(getPolygons(container));
}
return polygons;
}
private List<KmlPolygon> getPolygons(KmlContainer container) {
List<KmlPolygon> polygons = new ArrayList<>();
if (container == null) {
return polygons;
}
Iterable<KmlPlacemark> placemarks = container.getPlacemarks();
if (placemarks != null) {
for (KmlPlacemark placemark : placemarks) {
if (placemark.getGeometry() instanceof KmlPolygon) {
polygons.add((KmlPolygon) placemark.getGeometry());
}
}
}
if (container.hasContainers()) {
polygons.addAll(getPolygons(container.getContainers()));
}
return polygons;
}
private boolean liesOnPolygon(List<KmlPolygon> polygons, LatLng test) {
boolean lies = false;
if (polygons == null || test == null) {
return lies;
}
for (KmlPolygon polygon : polygons) {
if (liesOnPolygon(polygon, test)) {
lies = true;
break;
}
}
return lies;
}
private boolean liesOnPolygon(KmlPolygon polygon, LatLng test) {
boolean lies = false;
if (polygon == null || test == null) {
return lies;
}
// Get the outer boundary and check if the test location lies inside
ArrayList<LatLng> outerBoundary = polygon.getOuterBoundaryCoordinates();
lies = PolyUtil.containsLocation(test, outerBoundary, true);
if (lies) {
// Get the inner boundaries and check if the test location lies inside
ArrayList<ArrayList<LatLng>> innerBoundaries = polygon.getInnerBoundaryCoordinates();
if (innerBoundaries != null) {
for (ArrayList<LatLng> innerBoundary : innerBoundaries) {
// If the test location lies in a hole, the polygon doesn't contain the location
if (PolyUtil.containsLocation(test, innerBoundary, true)) {
lies = false;
break;
}
}
}
}
return lies;
}
这篇关于如何从android中的kml文件获取数组点的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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