Java 如何使用XML文件中的谷歌地图在Android应用程序上显示坐标标记
我有一个xml文件，其中包含一些位置及其坐标。我想在谷歌地图上的android应用程序上显示这些地方作为标记。我已经加载了地图。 我怎么能这样做？任何帮助都将非常感谢，即使有人能从理论上解释，因为我似乎无法理解它的概念。有人能帮忙吗 xml文件（placesp.xml）的示例：Java 如何使用XML文件中的谷歌地图在Android应用程序上显示坐标标记,java,android,xml,google-maps,Java,Android,Xml,Google Maps,我有一个xml文件，其中包含一些位置及其坐标。我想在谷歌地图上的android应用程序上显示这些地方作为标记。我已经加载了地图。 我怎么能这样做？任何帮助都将非常感谢，即使有人能从理论上解释，因为我似乎无法理解它的概念。有人能帮忙吗 xml文件（placesp.xml）的示例： 1. 地点1 地点描述1 ;40.430224;21.559570 2. 地点2 地点描述2 ;40.423324;21.062439 3. 地点3 地点描述3 ;40.266952;21.238220 也许您可以使用
1.
地点1
地点描述1
;40.430224;21.559570
2.
地点2
地点描述2
;40.423324;21.062439
3.
地点3
地点描述3
;40.266952;21.238220
public class Coordinates {
public static final HashMap<String, LatLng> COORDINATES = new HashMap<String, LatLng>();
static {
// Place1
COORDINATES.put("Place1", new LatLng(40.430224;21.559570));
}
locationLatLng = new LatLng(Coordinates.COORDINATES.get("Place1").latitude,Coordinates.COORDINATES.get("Place1").longitude);
map.addMarker(new MarkerOptions().position(locationLatLng));
我不确定如何从xml文件中访问数据，但理论上逻辑是相同的。你必须得到一个LatLng坐标来告诉addMarker方法把标记放在哪里，实际上就是这样。我希望我能在这方面帮助您。首先，您需要创建一个模型类来保存每个位置的信息。我为您提供了一个以下示例：Place.class
public class Place {
private int placeId;
private String placeName;
private String placeDescription;
private double placeLongitude;
private double placeLatitude;
public Place() {
super();
}
public int getPlaceId() {
return placeId;
}
public void setPlaceId(final int placeId) {
this.placeId = placeId;
}
public String getPlaceName() {
return placeName;
}
public void setPlaceName(final String placeName) {
this.placeName = placeName;
}
public String getPlaceDescription() {
return placeDescription;
}
public void setPlaceDescription(final String placeDescription) {
this.placeDescription = placeDescription;
}
public double getPlaceLongitude() {
return placeLongitude;
}
public void setPlaceLongitude(final double placeLongitude) {
this.placeLongitude = placeLongitude;
}
public double getPlaceLatitude() {
return placeLatitude;
}
public void setPlaceLatitude(final double placeLatitude) {
this.placeLatitude = placeLatitude;
}
}
public class PlaceXmlParser {
private static final String TAG = PlaceXmlParser.class.getSimpleName();
private static final String PLACE_ID = "place_id";
private static final String PLACE_NAME = "name";
private static final String PLACE_DESCRIPTION = "description";
private static final String PLACE_COORDINATES = "coordinates";
public PlaceXmlParser() {
super();
}
public List<Place> parsePlacesXml(final InputStream xmlStream) {
Place place = null;
final List<Place> placeList = new ArrayList<>();
try {
final XmlPullParserFactory xmlFactoryObject = XmlPullParserFactory.newInstance();
final XmlPullParser parser = xmlFactoryObject.newPullParser();
parser.setInput(xmlStream, null);
int event = parser.getEventType();
while (event != XmlPullParser.END_DOCUMENT) {
if (event == XmlPullParser.START_TAG) {
final String name = parser.getName();
switch (name) {
case PLACE_ID:
place = new Place();
setPlaceId(parser, place);
break;
case PLACE_NAME:
setPlaceName(parser, place);
break;
case PLACE_DESCRIPTION:
setPlaceDescription(parser, place);
break;
case PLACE_COORDINATES:
setPlaceLatLong(parser, place);
placeList.add(place);
break;
}
}
event = parser.next();
}
} catch (final XmlPullParserException e) {
Log.e(TAG, e.toString());
} catch (final IOException e) {
Log.e(TAG, e.toString());
}
return placeList;
}
private boolean areValidArgs(final XmlPullParser parser, final Place place) {
return null != parser && null != place;
}
private void setPlaceId(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String placeId = getTagValue(parser);
place.setPlaceId(Integer.parseInt(placeId));
}
}
private void setPlaceName(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String placeName = getTagValue(parser);
place.setPlaceName(placeName);
}
}
private void setPlaceDescription(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String placeDescription = getTagValue(parser);
place.setPlaceDescription(placeDescription);
}
}
private void setPlaceLatLong(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String[] latLong = getTagValue(parser).split(";");
if (3 == latLong.length) {
place.setPlaceLatitude(Double.parseDouble(latLong[1]));
place.setPlaceLongitude(Double.parseDouble(latLong[2]));
}
}
}
private String getTagValue(final XmlPullParser parser) {
String result = "";
try {
if (parser.next() == XmlPullParser.TEXT) {
result = parser.getText();
parser.nextTag();
}
} catch (final XmlPullParserException e) {
Log.e(TAG, e.toString());
} catch (final IOException e) {
Log.e(TAG, e.toString());
}
return result;
}
}
public class MapActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
private List<Place> placeList;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map);
this.placeList = getPlaceList();
}
@Override
public void onMapReady(final GoogleMap googleMap) {
this.mMap = googleMap;
addPlaceListMarkersToGoogleMap();
}
private void addPlaceListMarkersToGoogleMap() {
for (final Place place : this.placeList) {
final LatLong latLong = new LatLong(place.getPlaceLatitude(), place.getPlaceLongitude());
this.mMap.addMarker(new MarkerOptions().position(latLong).title(place.getPlaceName()));
}
}
private List<Place> getPlaceList() {
final String xmlString = "<placesp>" +
"<placep>" +
" <place_id>1</place_id>" +
" <name>Place1</name>" +
" <description>Place description 1</description>" +
" <coordinates>;40.430224;21.559570</coordinates>" +
"</placep>" +
"<placep>" +
" <place_id>2</place_id>" +
" <name>Place2</name>" +
" <description>Place description 2</description>" +
" <coordinates>;40.423324;21.062439</coordinates>" +
"</placep>" +
"<placep>" +
" <place_id>3</place_id>" +
" <name>Place3</name>" +
" <description>Place description 3</description>" +
" <coordinates>;40.266952;21.238220</coordinates>" +
"</placep>" +
"</placesp>";
final InputStream xmlStream = getXmlStream(xmlString);
final PlaceXmlParser parser = new PlaceXmlParser();
return parser.parsePlacesXml(xmlStream);
}
private InputStream getXmlStream(final String xmlString) {
InputStream xmlStream = null;
try {
xmlStream = new ByteArrayInputStream(xmlString.getBytes("UTF-8"));
} catch (final UnsupportedEncodingException e) {
e.printStackTrace();
}
return xmlStream;
}
}
public class Place {
private int placeId;
private String placeName;
private String placeDescription;
private double placeLongitude;
private double placeLatitude;
public Place() {
super();
}
public int getPlaceId() {
return placeId;
}
public void setPlaceId(final int placeId) {
this.placeId = placeId;
}
public String getPlaceName() {
return placeName;
}
public void setPlaceName(final String placeName) {
this.placeName = placeName;
}
public String getPlaceDescription() {
return placeDescription;
}
public void setPlaceDescription(final String placeDescription) {
this.placeDescription = placeDescription;
}
public double getPlaceLongitude() {
return placeLongitude;
}
public void setPlaceLongitude(final double placeLongitude) {
this.placeLongitude = placeLongitude;
}
public double getPlaceLatitude() {
return placeLatitude;
}
public void setPlaceLatitude(final double placeLatitude) {
this.placeLatitude = placeLatitude;
}
}
public class PlaceXmlParser {
private static final String TAG = PlaceXmlParser.class.getSimpleName();
private static final String PLACE_ID = "place_id";
private static final String PLACE_NAME = "name";
private static final String PLACE_DESCRIPTION = "description";
private static final String PLACE_COORDINATES = "coordinates";
public PlaceXmlParser() {
super();
}
public List<Place> parsePlacesXml(final InputStream xmlStream) {
Place place = null;
final List<Place> placeList = new ArrayList<>();
try {
final XmlPullParserFactory xmlFactoryObject = XmlPullParserFactory.newInstance();
final XmlPullParser parser = xmlFactoryObject.newPullParser();
parser.setInput(xmlStream, null);
int event = parser.getEventType();
while (event != XmlPullParser.END_DOCUMENT) {
if (event == XmlPullParser.START_TAG) {
final String name = parser.getName();
switch (name) {
case PLACE_ID:
place = new Place();
setPlaceId(parser, place);
break;
case PLACE_NAME:
setPlaceName(parser, place);
break;
case PLACE_DESCRIPTION:
setPlaceDescription(parser, place);
break;
case PLACE_COORDINATES:
setPlaceLatLong(parser, place);
placeList.add(place);
break;
}
}
event = parser.next();
}
} catch (final XmlPullParserException e) {
Log.e(TAG, e.toString());
} catch (final IOException e) {
Log.e(TAG, e.toString());
}
return placeList;
}
private boolean areValidArgs(final XmlPullParser parser, final Place place) {
return null != parser && null != place;
}
private void setPlaceId(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String placeId = getTagValue(parser);
place.setPlaceId(Integer.parseInt(placeId));
}
}
private void setPlaceName(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String placeName = getTagValue(parser);
place.setPlaceName(placeName);
}
}
private void setPlaceDescription(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String placeDescription = getTagValue(parser);
place.setPlaceDescription(placeDescription);
}
}
private void setPlaceLatLong(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String[] latLong = getTagValue(parser).split(";");
if (3 == latLong.length) {
place.setPlaceLatitude(Double.parseDouble(latLong[1]));
place.setPlaceLongitude(Double.parseDouble(latLong[2]));
}
}
}
private String getTagValue(final XmlPullParser parser) {
String result = "";
try {
if (parser.next() == XmlPullParser.TEXT) {
result = parser.getText();
parser.nextTag();
}
} catch (final XmlPullParserException e) {
Log.e(TAG, e.toString());
} catch (final IOException e) {
Log.e(TAG, e.toString());
}
return result;
}
}
public class MapActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
private List<Place> placeList;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map);
this.placeList = getPlaceList();
}
@Override
public void onMapReady(final GoogleMap googleMap) {
this.mMap = googleMap;
addPlaceListMarkersToGoogleMap();
}
private void addPlaceListMarkersToGoogleMap() {
for (final Place place : this.placeList) {
final LatLong latLong = new LatLong(place.getPlaceLatitude(), place.getPlaceLongitude());
this.mMap.addMarker(new MarkerOptions().position(latLong).title(place.getPlaceName()));
}
}
private List<Place> getPlaceList() {
final String xmlString = "<placesp>" +
"<placep>" +
" <place_id>1</place_id>" +
" <name>Place1</name>" +
" <description>Place description 1</description>" +
" <coordinates>;40.430224;21.559570</coordinates>" +
"</placep>" +
"<placep>" +
" <place_id>2</place_id>" +
" <name>Place2</name>" +
" <description>Place description 2</description>" +
" <coordinates>;40.423324;21.062439</coordinates>" +
"</placep>" +
"<placep>" +
" <place_id>3</place_id>" +
" <name>Place3</name>" +
" <description>Place description 3</description>" +
" <coordinates>;40.266952;21.238220</coordinates>" +
"</placep>" +
"</placesp>";
final InputStream xmlStream = getXmlStream(xmlString);
final PlaceXmlParser parser = new PlaceXmlParser();
return parser.parsePlacesXml(xmlStream);
}
private InputStream getXmlStream(final String xmlString) {
InputStream xmlStream = null;
try {
xmlStream = new ByteArrayInputStream(xmlString.getBytes("UTF-8"));
} catch (final UnsupportedEncodingException e) {
e.printStackTrace();
}
return xmlStream;
}
}
公共类PlaceXmlParser{
私有静态最终字符串标记=PlaceXmlParser.class.getSimpleName（）；
私有静态最终字符串PLACE\u ID=“PLACE\u ID”；
私有静态最终字符串PLACE_NAME=“NAME”；
私有静态最终字符串位置\u DESCRIPTION=“DESCRIPTION”；
私有静态最终字符串PLACE_COORDINATES=“COORDINATES”；
公共PlaceXmlParser（）{
超级（）；
}
公共列表parsePlacesXml（最终输入流xmlStream）{
Place=null；
最终列表placeList=新的ArrayList（）；
试一试{
最终XmlPullParserFactory xmlFactoryObject=XmlPullParserFactory.newInstance（）；
最终XmlPullParser parser=xmlFactoryObject.newPullParser（）；
setInput（xmlStream，null）；
int event=parser.getEventType（）；
while（event！=XmlPullParser.END_文档）{
if（event==XmlPullParser.START_标记）{
最终字符串名=parser.getName（）；
交换机（名称）{
案件地点(编号:
地点=新地点（）；
setPlaceId（解析器，位置）；
打破
案件地点(单位名称):
setPlaceName（解析器，位置）；
打破
案例地点描述：
setPlaceDescription（解析器，位置）；
打破
案例地点坐标：
setPlaceLatLong（解析器，位置）；
地点列表。添加（地点）；
打破
}
}
event=parser.next（）；
}
}捕获（最终XMLPullParseRexE）{
Log.e（标记，e.toString（））；
}捕获（最终IOE例外）{
Log.e（标记，e.toString（））；
}
返回位置列表；
}
私有布尔值areValidArgs（最终XmlPullParser解析器，最终位置）{
返回null！=解析器&&null！=位置；
}
私有void setPlaceId（最终XmlPullParser解析器，最终位置）{
if（areValidArgs（解析器，位置））{
最终字符串placeId=getTagValue（解析器）；
setPlaceId（Integer.parseInt（placeId））；
}
}
私有void setPlaceName（最终XmlPullParser解析器，最终位置）{
if（areValidArgs（解析器，位置））{
最终字符串placeName=getTagValue（解析器）；
place.setPlaceName（placeName）；
}
}
私有void setPlaceDescription（最终XmlPullParser解析器，最终位置）{
if（areValidArgs（解析器，位置））{
最终字符串placeDescription=getTagValue（解析器）；
place.setPlaceDescription（placeDescription）；
}
}
私有void setPlaceLatLong（最终XmlPullParser解析器，最终位置）{
if（areValidArgs（解析器，位置））{
最后一个字符串[]latLong=getTagValue（解析器）.split（“；”）；
if（3==latLong.length）{
place.setPlaceLatitude（Double.parseDouble（latLong[1]））；
place.setPlaceLongitude（Double.parseDouble（latLong[2]））；
}
}
}
私有字符串getTagValue（最终XmlPullParser）{
字符串结果=”；
试一试{
if（parser.next（）==XmlPullParser.TEXT）{
结果=parser.getText（）；
parser.nextTag（）；
}
}捕获（最终XMLPullParseRexE）{
Log.e（标记，e.toString（））；
}捕获（最终IOE例外）{
Log.e（标记，e.toString（））；
}
返回结果；
}
}
public class Place {
private int placeId;
private String placeName;
private String placeDescription;
private double placeLongitude;
private double placeLatitude;
public Place() {
super();
}
public int getPlaceId() {
return placeId;
}
public void setPlaceId(final int placeId) {
this.placeId = placeId;
}
public String getPlaceName() {
return placeName;
}
public void setPlaceName(final String placeName) {
this.placeName = placeName;
}
public String getPlaceDescription() {
return placeDescription;
}
public void setPlaceDescription(final String placeDescription) {
this.placeDescription = placeDescription;
}
public double getPlaceLongitude() {
return placeLongitude;
}
public void setPlaceLongitude(final double placeLongitude) {
this.placeLongitude = placeLongitude;
}
public double getPlaceLatitude() {
return placeLatitude;
}
public void setPlaceLatitude(final double placeLatitude) {
this.placeLatitude = placeLatitude;
}
}
public class PlaceXmlParser {
private static final String TAG = PlaceXmlParser.class.getSimpleName();
private static final String PLACE_ID = "place_id";
private static final String PLACE_NAME = "name";
private static final String PLACE_DESCRIPTION = "description";
private static final String PLACE_COORDINATES = "coordinates";
public PlaceXmlParser() {
super();
}
public List<Place> parsePlacesXml(final InputStream xmlStream) {
Place place = null;
final List<Place> placeList = new ArrayList<>();
try {
final XmlPullParserFactory xmlFactoryObject = XmlPullParserFactory.newInstance();
final XmlPullParser parser = xmlFactoryObject.newPullParser();
parser.setInput(xmlStream, null);
int event = parser.getEventType();
while (event != XmlPullParser.END_DOCUMENT) {
if (event == XmlPullParser.START_TAG) {
final String name = parser.getName();
switch (name) {
case PLACE_ID:
place = new Place();
setPlaceId(parser, place);
break;
case PLACE_NAME:
setPlaceName(parser, place);
break;
case PLACE_DESCRIPTION:
setPlaceDescription(parser, place);
break;
case PLACE_COORDINATES:
setPlaceLatLong(parser, place);
placeList.add(place);
break;
}
}
event = parser.next();
}
} catch (final XmlPullParserException e) {
Log.e(TAG, e.toString());
} catch (final IOException e) {
Log.e(TAG, e.toString());
}
return placeList;
}
private boolean areValidArgs(final XmlPullParser parser, final Place place) {
return null != parser && null != place;
}
private void setPlaceId(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String placeId = getTagValue(parser);
place.setPlaceId(Integer.parseInt(placeId));
}
}
private void setPlaceName(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String placeName = getTagValue(parser);
place.setPlaceName(placeName);
}
}
private void setPlaceDescription(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String placeDescription = getTagValue(parser);
place.setPlaceDescription(placeDescription);
}
}
private void setPlaceLatLong(final XmlPullParser parser, final Place place) {
if (areValidArgs(parser, place)) {
final String[] latLong = getTagValue(parser).split(";");
if (3 == latLong.length) {
place.setPlaceLatitude(Double.parseDouble(latLong[1]));
place.setPlaceLongitude(Double.parseDouble(latLong[2]));
}
}
}
private String getTagValue(final XmlPullParser parser) {
String result = "";
try {
if (parser.next() == XmlPullParser.TEXT) {
result = parser.getText();
parser.nextTag();
}
} catch (final XmlPullParserException e) {
Log.e(TAG, e.toString());
} catch (final IOException e) {
Log.e(TAG, e.toString());
}
return result;
}
}
public class MapActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
private List<Place> placeList;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map);
this.placeList = getPlaceList();
}
@Override
public void onMapReady(final GoogleMap googleMap) {
this.mMap = googleMap;
addPlaceListMarkersToGoogleMap();
}
private void addPlaceListMarkersToGoogleMap() {
for (final Place place : this.placeList) {
final LatLong latLong = new LatLong(place.getPlaceLatitude(), place.getPlaceLongitude());
this.mMap.addMarker(new MarkerOptions().position(latLong).title(place.getPlaceName()));
}
}
private List<Place> getPlaceList() {
final String xmlString = "<placesp>" +
"<placep>" +
" <place_id>1</place_id>" +
" <name>Place1</name>" +
" <description>Place description 1</description>" +
" <coordinates>;40.430224;21.559570</coordinates>" +
"</placep>" +
"<placep>" +
" <place_id>2</place_id>" +
" <name>Place2</name>" +
" <description>Place description 2</description>" +
" <coordinates>;40.423324;21.062439</coordinates>" +
"</placep>" +
"<placep>" +
" <place_id>3</place_id>" +
" <name>Place3</name>" +
" <description>Place description 3</description>" +
" <coordinates>;40.266952;21.238220</coordinates>" +
"</placep>" +
"</placesp>";
final InputStream xmlStream = getXmlStream(xmlString);
final PlaceXmlParser parser = new PlaceXmlParser();
return parser.parsePlacesXml(xmlStream);
}
private InputStream getXmlStream(final String xmlString) {
InputStream xmlStream = null;
try {
xmlStream = new ByteArrayInputStream(xmlString.getBytes("UTF-8"));
} catch (final UnsupportedEncodingException e) {
e.printStackTrace();
}
return xmlStream;
}
}
公共类MapActivity扩展了FragmentActivity在MapReadyCallback上的实现{
私有谷歌地图；
私人名单；
@凌驾
创建时受保护的void（最终捆绑包savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_map）；
this.placeList=getPlaceList（）；
}
@凌驾
4月1日公开作废（最终谷歌地图谷歌地图）{
this.mMap=谷歌地图；
AddPlaceListMarkersToLogleMap（）；
}
私有void addPlaceListMarkersToLogleMap（）{
for（最终位置：此。位置列表）{
final LatLong LatLong=新LatLong（place.getPlaceLatitude（），place.getPlace经度（））；
this.mMap.addMarker（新的MarkerOptions（）.position（latLong.title）（place.getPlaceName（））；
}
}
私有列表getPlaceList（）{
最终字符串xmlString=“”+
"" +
" 1" +
“地点1”+
“位置描述1”+
" ;40.430224;21.559570" +
"" +
"" +
" 2" +
“地点2”+