我正在做一个地图应用程序[读取KML文件并将其显示到谷歌地图]，我正在使用这个网站上讨论过的类。课程如下所示。
我遇到了一些问题 1- the R.layout.main＆gt;＆gt;主要有一个错误 2-而且，dest [1]和dest [0]它们没有被识别 3-还没有识别出路径功能
我从这个链接How to draw a path on a map using kml file?
获得了这个课程package com.test.map;
import com.test.map.R ;
import java.net.URL;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import android.R;
import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.OverlayItem;
public class DirectionMapActivity extends MapActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
MapView mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
// Acquire a reference to the system Location Manager
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
String locationProvider = LocationManager.NETWORK_PROVIDER;
Location lastKnownLocation = locationManager.getLastKnownLocation(locationProvider);
StringBuilder urlString = new StringBuilder();
urlString.append("http://maps.google.com/maps?f=d&hl=en");
urlString.append("&saddr=");//from
urlString.append( Double.toString(lastKnownLocation.getLatitude() ));
urlString.append(",");
urlString.append( Double.toString(lastKnownLocation.getLongitude() ));
urlString.append("&daddr=");//to
urlString.append( Double.toString((double)dest[0]/1.0E6 ));
urlString.append(",");
urlString.append( Double.toString((double)dest[1]/1.0E6 ));
urlString.append("&ie=UTF8&0&om=0&output=kml");
try{
// setup the url
URL url = new URL(urlString.toString());
// create the factory
SAXParserFactory factory = SAXParserFactory.newInstance();
// create a parser
SAXParser parser = factory.newSAXParser();
// create the reader (scanner)
XMLReader xmlreader = parser.getXMLReader();
// instantiate our handler
NavigationSaxHandler navSaxHandler = new NavigationSaxHandler();
// assign our handler
xmlreader.setContentHandler(navSaxHandler);
// get our data via the url class
InputSource is = new InputSource(url.openStream());
// perform the synchronous parse
xmlreader.parse(is);
// get the results - should be a fully populated RSSFeed instance, or null on error
NavigationDataSet ds = navSaxHandler.getParsedData();
// draw path
drawPath(ds, Color.parseColor("#add331"), mapView );
// find boundary by using itemized overlay
GeoPoint destPoint = new GeoPoint(dest[0],dest[1]);
GeoPoint currentPoint = new GeoPoint( new Double(lastKnownLocation.getLatitude()*1E6).intValue()
,new Double(lastKnownLocation.getLongitude()*1E6).intValue() );
Drawable dot = this.getResources().getDrawable(R.drawable.pixel);
MapItemizedOverlay bgItemizedOverlay = new MapItemizedOverlay(dot,this);
OverlayItem currentPixel = new OverlayItem(destPoint, null, null );
OverlayItem destPixel = new OverlayItem(currentPoint, null, null );
bgItemizedOverlay.addOverlay(currentPixel);
bgItemizedOverlay.addOverlay(destPixel);
// center and zoom in the map
MapController mc = mapView.getController();
mc.zoomToSpan(bgItemizedOverlay.getLatSpanE6()*2,bgItemizedOverlay.getLonSpanE6()*2);
mc.animateTo(new GeoPoint(
(currentPoint.getLatitudeE6() + destPoint.getLatitudeE6()) / 2
, (currentPoint.getLongitudeE6() + destPoint.getLongitudeE6()) / 2));
} catch(Exception e) {
Log.d("DirectionMap","Exception parsing kml.");
}
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
}
// and the rest of the methods in activity, e.g. drawPath() etc...
答案 0 :(得分：0)
以下是您问题的一些答案：
<强> 1 即可。您可以将新的布局文件调整为您自己的。非常像这样的东西
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout_fragement_mapview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/royal_blue"
android:orientation="vertical" >
<com.google.android.maps.MapView
android:id="@+id/mapview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:apiKey="@string/maps_api_key"
android:clickable="true"
android:enabled="true" />
</RelativeLayout>
<强> 2 即可。在dest[]中，有2个常量，例如：
int[] dest = new int[] { 42500000, 1950000 };
只需将其复制并粘贴为DirectionMapActivty
第3 即可。这是drawPath()。您可以在DirectionMapActivity中将其用作方法，或在其他类中使用静态方法
public abstract class Drawing {
private static final String TAG = "Drawing";
public static void drawPath(NavigationDataSet navSet, int color, MapView mMapView01) {
Log.d(TAG, "map color before: " + color);
// color correction for dining, make it darker
if (color == Color.parseColor("#add331"))
color = Color.parseColor("#6C8715");
Log.d(TAG, "map color after: " + color);
Collection overlaysToAddAgain = new ArrayList<Object>();
for (Iterator<Overlay> iter = mMapView01.getOverlays().iterator(); iter.hasNext();) {
Object o = iter.next();
Log.d(TAG, "overlay type: " + o.getClass().getName());
if (!RouteOverlay.class.getName().equals(o.getClass().getName())) {
// mMapView01.getOverlays().remove(o);
overlaysToAddAgain.add(o);
}
}
mMapView01.getOverlays().clear();
mMapView01.getOverlays().addAll(overlaysToAddAgain);
String path = navSet.getRoutePlacemark().getCoordinates();
Log.d(TAG, "path=" + path);
if (path != null && path.trim().length() > 0) {
String[] pairs = path.trim().split(" ");
Log.d(TAG, "pairs.length=" + pairs.length);
String[] lngLat = pairs[0].split(","); // lngLat[0]=longitude lngLat[1]=latitude
// lngLat[2]=height
Log.d(TAG, "lnglat =" + lngLat + ", length: " + lngLat.length);
if (lngLat.length < 3)
lngLat = pairs[1].split(","); // if first pair is not transferred completely, take
// seconds pair //TODO
try {
GeoPoint startGP = new GeoPoint((int) (Double.parseDouble(lngLat[1]) * 1E6),
(int) (Double.parseDouble(lngLat[0]) * 1E6));
mMapView01.getOverlays().add(new RouteOverlay(startGP, startGP, 1));
GeoPoint gp1;
GeoPoint gp2 = startGP;
for (int i = 1; i < pairs.length; i++) // the last one would be crash
{
lngLat = pairs[i].split(",");
gp1 = gp2;
if (lngLat.length >= 2 && gp1.getLatitudeE6() > 0 && gp1.getLongitudeE6() > 0
&& gp2.getLatitudeE6() > 0 && gp2.getLongitudeE6() > 0) {
// for GeoPoint, first:latitude, second:longitude
gp2 = new GeoPoint((int) (Double.parseDouble(lngLat[1]) * 1E6),
(int) (Double.parseDouble(lngLat[0]) * 1E6));
if (gp2.getLatitudeE6() != 22200000) {
mMapView01.getOverlays().add(new RouteOverlay(gp1, gp2, 2, color));
Log.d(TAG, "draw:" + gp1.getLatitudeE6() + "/" + gp1.getLongitudeE6() + " TO "
+ gp2.getLatitudeE6() + "/" + gp2.getLongitudeE6());
}
}
// Log.d(myapp.APP,"pair:" + pairs[i]);
}
// routeOverlays.add(new RouteOverlay(gp2,gp2, 3));
mMapView01.getOverlays().add(new RouteOverlay(gp2, gp2, 3));
} catch (NumberFormatException e) {
Log.e(TAG, "Cannot draw route.", e);
}
}
// mMapView01.getOverlays().addAll(routeOverlays); // use the default color
mMapView01.setEnabled(true);
}
我希望这可以提供帮助。玩得开心。
答案 1 :(得分：0)
试试这个
Intent mapIntent = new Intent(Intent.ACTION_VIEW, uri);
Uri uri1 = Uri.parse("geo:0,0?q=http://code.google.com/apis/kml/
documentation/KML_Samples.kml");
mapIntent.setData(uri1);
startActivity(Intent.createChooser(mapIntent, "Sample Map "));
答案 2 :(得分：0)
public class KmlDemoActivity extends FragmentActivity {
private GoogleMap mMap;
private KmlLayer kmlLayer;
private MarkerOptions markerOptions;
private ArrayList<LatLng> arrayPoints = null;
private int flag = 0;//which you draw Line=2 or Polygone=1
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_draw_route);
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());
if (status != ConnectionResult.SUCCESS) {
int requestCode = 10;
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
dialog.show();
} else {
SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mMap = fm.getMap();
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mMap.setMyLocationEnabled(true);
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
// Getting Current Location
Location location = locationManager.getLastKnownLocation(provider);
if (location != null) {
onLocationChanged(location);
}
retrieveFileFromResourceArea();
}
}
private void retrieveFileFromResourceArea() {
flag = 1;
try {
KmlLayer kmlLayer = new KmlLayer(mMap, R.raw.campus, getApplicationContext());
kmlLayer.addLayerToMap();
moveCameraToKml(kmlLayer);
} catch (IOException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
}
retrieveFileFromResourceLine();
}
private void retrieveFileFromResourceLine() {
flag = 2;
try {
KmlLayer kmlLayer = new KmlLayer(mMap, R.raw.data, getApplicationContext());
kmlLayer.addLayerToMap();
moveCameraToKml(kmlLayer);
} catch (IOException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
}
}
public void onLocationChanged(Location location) {
// Getting latitude of the current location
double latitude = location.getLatitude();
// Getting longitude of the current location
double longitude = location.getLongitude();
// Creating a LatLng object for the current location
LatLng latLng = new LatLng(latitude, longitude);
}
private void moveCameraToKml(KmlLayer kmlLayer) {
KmlContainer container = kmlLayer.getContainers().iterator().next();
container = container.getContainers().iterator().next();
KmlPlacemark placemark = container.getPlacemarks().iterator().next();
final LatLngBounds.Builder builder = new LatLngBounds.Builder();
if (flag == 1) {
KmlPolygon polygon = (KmlPolygon) placemark.getGeometry();
for (LatLng latLng : polygon.getOuterBoundaryCoordinates()) {
builder.include(latLng);
}
}
if (flag == 2) {
KmlLineString lineString = (KmlLineString) placemark.getGeometry();
for (LatLng latLng : lineString.getGeometryObject()) {
builder.include(latLng);
}
}
mMap.setOnMapLoadedCallback(new GoogleMap.OnMapLoadedCallback() {
@Override
public void onMapLoaded() {
mMap.moveCamera(CameraUpdateFactory.newLatLngBounds(builder.build(), 1));
}
});
}
}
答案 3 :(得分：0)
try {
String file = Environment.getExternalStorageDirectory().getPath() + "/campus.kml";
String[] kmlfile = file.split("/");
String kml=kmlfile[4];
File myFile = new File(Environment.getExternalStorageDirectory().toString() + "/DCIM/Camera/campus");
FileInputStream fIn = new FileInputStream(myFile);
KmlLayer kmlLayer = new KmlLayer(mMap, fIn, getApplicationContext());
KmlLayer kmlLayer = new KmlLayer(mMap, R.raw.campus, getApplicationContext());
kmlLayer.addLayerToMap();
moveCameraToKml(kmlLayer);
} catch (IOException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
}
}