如何在谷歌地图中的两点之间画线？
答案 0 :(得分：0)
请参阅此问题的已接受答案：Drawing a line/path on Google Maps
答案 1 :(得分：0)
public class DrivingDirection extends MapActivity implements
IDirectionsListener {
Button btnRedirectHome;
Vector<GeoPoint> mapData = new Vector<GeoPoint>();
Vector<GeoPoint> NearData = new Vector<GeoPoint>();
MapView mapView;
MapController mc;
GeoPoint p;
GeoPoint endpoint;
MapOverlay mapOverlay;
private AlertDialog.Builder alertDialog1, alertDialog;
boolean exception = false;
// ** Called when the activity is first created. *//*
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.courtdetaildetdirection_layout);
mapView = (MapView) findViewById(R.id.mapView);
mapView.setBuiltInZoomControls(true);
mc = mapView.getController();
Bundle extras = getIntent().getExtras();
String courtId = extras != null ? extras.getString("CourtId") : "";
if(GUIStatics.previousActivityNameFalg.equalsIgnoreCase("MatchDetailActivity"))
{
if (GUIStatiMethods
.connectionCheck(DrivingDirection.this)) {
Court_Player_LocationFatcher objectCourt_Player_LocationFatch = new Court_Player_LocationFatcher();
objectCourt_Player_LocationFatch.Court_Player_LocationFatch(GUIStatics.strUserID,courtId);
final CourtDetailFatcher myCourtDetailFatcher = new CourtDetailFatcher();
myCourtDetailFatcher.CourtDetailFatch(courtId);
}
}
else if(GUIStatics.previousActivityNameFalg.equalsIgnoreCase("FavoritesActivity"))
{
if (GUIStatiMethods
.connectionCheck(DrivingDirection.this)) {
Court_Player_LocationFatcher objectCourt_Player_LocationFatch = new Court_Player_LocationFatcher();
objectCourt_Player_LocationFatch.Court_Player_LocationFatch(GUIStatics.strUserID,courtId);
final CourtDetailFatcher myCourtDetailFatcher = new CourtDetailFatcher();
myCourtDetailFatcher.CourtDetailFatch(courtId);
}
}
else
{
if (GUIStatiMethods
.connectionCheck(DrivingDirection.this)) {
Court_Player_LocationFatcher objectCourt_Player_LocationFatch = new Court_Player_LocationFatcher();
objectCourt_Player_LocationFatch.Court_Player_LocationFatch(GUIStatics.strUserID,courtId);
final CourtDetailFatcher myCourtDetailFatcher = new CourtDetailFatcher();
myCourtDetailFatcher.CourtDetailFatch(courtId);
}
}
TextView TextViewCourtDetailHeader = (TextView) this
.findViewById(R.id.TextViewCourtDetailHeader);
TextView TextViewCourtDetailAddress = (TextView) this
.findViewById(R.id.TextViewCourtDetailAddress);
TextView TextViewCourtDetailNoOfCourtAndType = (TextView) this
.findViewById(R.id.TextViewCourtDetailNoOfCourtAndType);
TextView TextViewCourtDetailCourtType = (TextView) this
.findViewById(R.id.TextViewCourtDetailCourtType);
TextView TextViewCourtDetailLight = (TextView) this
.findViewById(R.id.TextViewCourtDetailLight);
TextViewCourtDetailHeader
.setText(CourtDetailDataHandler.object.COURTNAME);
TextViewCourtDetailAddress
.setText(CourtDetailDataHandler.object.COURTADDRESS);
TextViewCourtDetailNoOfCourtAndType
.setText(CourtDetailDataHandler.object.NUMBEROFCOURT);
TextViewCourtDetailCourtType
.setText(CourtDetailDataHandler.object.COURTTYPE);
TextViewCourtDetailLight.setText("Lights: "
+ CourtDetailDataHandler.object.COURTLIGHT);
String url = "http://maps.google.com/maps?f=d&hl=en&saddr="
+ Court_Player_LocationHandler.mCOURTLAT + ","
+ Court_Player_LocationHandler.mCOURTLON + "&daddr="
+ Court_Player_LocationHandler.mUSERLAT + ","
+ Court_Player_LocationHandler.mUSERLON
+ "&ie=UTF8&0&om=0&z=20&output=kml";
Document d = GetDataFromServer(url);
if (exception) {
exception = false;
GeoPoint source = new GeoPoint(
(int) (Double
.parseDouble(Court_Player_LocationHandler.mCOURTLAT) * 1E6),
(int) (Double
.parseDouble(Court_Player_LocationHandler.mCOURTLON) * 1E6));
mapData.add(source);
GeoPoint destination = new GeoPoint(
(int) (Double
.parseDouble(Court_Player_LocationHandler.mUSERLAT) * 1E6),
(int) (Double
.parseDouble(Court_Player_LocationHandler.mUSERLON) * 1E6));
mapData.add(destination);
} else {
ParseServerData(d);
}
LinearLayout zoomLayout = (LinearLayout) findViewById(R.id.zoom);
View zoomView = mapView.getZoomControls();
zoomLayout.addView(zoomView, new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
mapView.displayZoomControls(true);
mc = mapView.getController();
for (int i = 0; i < mapData.size(); i++) {
GeoPoint gp = mapData.get(i);
mc.animateTo(gp);
}
for (int i = 0; i < NearData.size(); i++) {
GeoPoint gp = mapData.get(i);
mc.animateTo(gp);
}
mc.setZoom(18);
// ---Add a location marker---
MapOverlay mapOverlay = new MapOverlay();
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
mapView.invalidate();
}
class MapOverlay extends com.google.android.maps.Overlay {
Paint innerPaint;
int infoWindowOffsetX, infoWindowOffsetY, testX, testY, id;
boolean showWindow = false;
Bitmap bitmap, bmp, bitMoreInformation;
String argName;
boolean temp = true;
@Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow,
long when) {
super.draw(canvas, mapView, shadow);
bmp = BitmapFactory.decodeResource(getResources(),
R.drawable.marker);
// ---translate the GeoPoint to screen pixels---
Paint myPaintBlack1 = new Paint();
myPaintBlack1.setColor(Color.BLUE);
myPaintBlack1.setStyle(Style.STROKE);
myPaintBlack1.setStrokeWidth(4f);
Point screenPts[] = new Point[mapData.size()];
for (int i = 0; i < mapData.size(); i++) {
Point screenPt = new Point();
GeoPoint gp = mapData.get(i);
mapView.getProjection().toPixels(gp, screenPt);// screenPts[i]);
screenPts[i] = screenPt;
if (i == 0)
canvas.drawBitmap(bmp, screenPts[i].x - bmp.getWidth() / 2,
screenPts[i].y - bmp.getHeight(), null);
if (i == mapData.size() - 1)
canvas.drawBitmap(bmp, screenPts[i].x - bmp.getWidth() / 2,
screenPts[i].y - bmp.getHeight(), null);
}
for (int i = 0; i < NearData.size(); i++) {
Point screenPs = new Point();
GeoPoint gp = mapData.get(i);
mapView.getProjection().toPixels(gp, screenPs);// screenPts[i]);
canvas.drawBitmap(bmp, screenPs.x - bmp.getWidth() / 2,
screenPs.y - bmp.getHeight(), null);
}
for (int i = 1; i < screenPts.length; i++) {
canvas.drawLine(screenPts[i - 1].x, screenPts[i - 1].y,
screenPts[i].x, screenPts[i].y, myPaintBlack1);
}
return true;
}
public Paint getInnerPaint() {
if (innerPaint == null) {
innerPaint = new Paint();
innerPaint.setARGB(225, 75, 75, 75); // gray
innerPaint.setAntiAlias(true);
}
return innerPaint;
}
@Override
public boolean onTap(GeoPoint p, MapView mapView) {
return true;
}
}
public Document GetDataFromServer(String url) {
try {
URL updateURL = new URL(url);
URLConnection conn = updateURL.openConnection();
InputStream is = conn.getInputStream();
DocumentBuilderFactory factory = DocumentBuilderFactory
.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(is);
is.close();
return document;
} catch (Exception e) {
exception = true;
System.out.print("Exception:-" + e);
}
exception = true;
return null;
}
private void ParseServerData(Document doc) {
Element rootElement = doc.getDocumentElement();
rootElement.normalize();
NodeList nodeLst = doc.getElementsByTagName("LookAt");
int c = nodeLst.getLength();
System.out.println("count= " + c);
for (int s = 0; s < nodeLst.getLength(); s++) {
Node fstNode = nodeLst.item(s);
if (fstNode.getNodeType() == Node.ELEMENT_NODE) {
// Points p = new Points();
Element Elmnt = (Element) fstNode;
double lat = Double
.parseDouble(getTextValue(Elmnt, "latitude"));
double lng = Double
.parseDouble(getTextValue(Elmnt, "longitude"));
GeoPoint gp = new GeoPoint((int) (lat * 1E6), (int) (lng * 1E6));
mapData.add(gp);
}
}
}
public String getTextValue(Element ele, String tagName) {
String textVal = "";
NodeList nl = ele.getElementsByTagName(tagName);
if (nl != null && nl.getLength() > 0) {
Element el = (Element) nl.item(0);
NodeList ndlist = el.getChildNodes();
Node node = ndlist.item(0);
if (node != null)
textVal = node.getNodeValue();
}
return textVal;
}
// handler for the background updating
Handler progressHandler = new Handler() {
public void handleMessage(Message msg) {
}
};
@Override
protected boolean isRouteDisplayed() {
return false;
}
public void onDirectionsAvailable(Route route,
com.cipl.Courts.DrivingDirections.Mode mode) {
}
public void onDirectionsNotAvailable() {
}
}
上面的代码在android中的Map上的两点之间画线。 我希望这是有帮助的。