我正在使用 Google Map V2 并在两个位置和互联网连接（仅调用 web 服务）之间绘制路线，并且没有后台服务以及线程和接收器。
但它仍然占用了太多的内存。请看附图。有什么办法可以减少。
public class LocationMapFragment extends FragmentActivity {
private ArrayList<LatLng> latLongArrayList = new ArrayList<LatLng>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.map_layout);
context = this;
Location location = Utils.getGPSLocation(context);
if(location != null) {
currentLatitude = location.getLatitude();
currentLongitude = location.getLongitude();
setLayout();
}
}
public void setLayout() {
display = this.getWindowManager().getDefaultDisplay();
map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
map.setMyLocationEnabled(true);
if(getIntent().getBooleanExtra("isFromSameActivity", false)) {
// Getting reference to SupportMapFragment of the activity_main
map.addMarker(new MarkerOptions().position(new LatLng(currentLatitude, currentLongitude)).title("You are Here"));
latitude = getIntent().getDoubleExtra("selectLatitude", 0);
longitude = getIntent().getDoubleExtra("selectLongitude", 0);
latLongArrayList.add(new LatLng(latitude, longitude));
if(searchLatitude != 0 && searchLongitude != 0) {
new SearchGetNearestATM().execute();
latLongArrayList.add(new LatLng(searchLatitude, searchLongitude));
} else {
new GetNearestATM().execute();
if(currentLatitude != 0 && currentLongitude != 0)
latLongArrayList.add(new LatLng(currentLatitude, currentLongitude));
}
}
else if(!getIntent().getBooleanExtra("isAtmClick", false)) {
// Getting reference to SupportMapFragment of the activity_main
map.addMarker(new MarkerOptions().position(new LatLng(currentLatitude, currentLongitude)).title("You are Here"));
if(searchLatitude != 0 && searchLongitude != 0) {
new SearchGetNearestATM().execute();
latLongArrayList.add(new LatLng(searchLatitude, searchLongitude));
} else {
new GetNearestATM().execute();
if(currentLatitude != 0 && currentLongitude != 0)
latLongArrayList.add(new LatLng(currentLatitude, currentLongitude));
}
}
else {
isATMCLick = true;
latitude = getIntent().getDoubleExtra("selectLatitude", 0);
longitude = getIntent().getDoubleExtra("selectLongitude", 0);
if(searchLatitude != 0 && searchLongitude != 0)
latLongArrayList.add(new LatLng(searchLatitude, searchLongitude));
else {
if(currentLatitude != 0 && currentLongitude != 0)
latLongArrayList.add(new LatLng(currentLongitude, currentLongitude));
}
map.addMarker(new MarkerOptions().position(new LatLng(currentLatitude, currentLongitude)).title("You are Here"));
double latitudeArray[] = getIntent().getDoubleArrayExtra("latitude");
double longitudeArray[] = getIntent().getDoubleArrayExtra("longitude");
String namesArray[] = getIntent().getStringArrayExtra("names");
String typeArray[] = getIntent().getStringArrayExtra("typeList");
for(int index = 0; index < latitudeArray.length; index++) {
latLongArrayList.add(new LatLng(latitudeArray[index], longitudeArray[index]));
if(!getIntent().getStringExtra("selectName").equals(namesArray[index])) {
if(typeArray[index].equals("1")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.first)));
} else if(typeArray[index].equals("2")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.second)));
} else if(typeArray[index].equals("3")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.third)));
} else if(typeArray[index].equals("4")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.fourth)));
} else if(typeArray[index].equals("5")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.fifth)));
} else if(typeArray[index].equals("6")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.sixth)));
} else if(typeArray[index].equals("7")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.seventh)));
} else if(typeArray[index].equals("8")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.eight)));
} else if(typeArray[index].equals("9")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ninth)));
}
}
else {
if(typeArray[index].equals("1")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.first)));
} else if(typeArray[index].equals("2")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.second)));
} else if(typeArray[index].equals("3")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.third)));
} else if(typeArray[index].equals("4")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.fourth)));
} else if(typeArray[index].equals("5")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.fifth)));
} else if(typeArray[index].equals("6")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.sixth)));
} else if(typeArray[index].equals("7")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.seventh)));
} else if(typeArray[index].equals("8")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.eight)));
} else if(typeArray[index].equals("9")) {
map.addMarker(new MarkerOptions().position(new LatLng(
latitudeArray[index], longitudeArray[index])).title(namesArray[index] + "\net Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.n)));
}
//Driving Direction
new GetDrivingDirectionsAsync().execute();
map.setInfoWindowAdapter(new PopupAdapter(getLayoutInflater()));
//Marker Click Listener
map.setOnInfoWindowClickListener(new OnInfoWindowClickListener() {
@Override
public void onInfoWindowClick(Marker marker) {
LatLng latLng = marker.getPosition();
latitude = latLng.latitude;
longitude = latLng.longitude;
Intent intent = new Intent(context, AndroidTabLayoutActivity.class);
intent.putExtra("isFromSameActivity", true);
intent.putExtra("selectLatitude", latitude);
intent.putExtra("selectLongitude", longitude);
startActivity(intent);
}
});
}
}
}
}
@Override
public boolean onPrepareOptionsMenu (Menu menu) {
if(!isATMCLick) {
menu.removeItem(R.id.navigate);
}
menu.removeItem(R.id.settings);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater=getMenuInflater();
inflater.inflate(R.menu.map_menu, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()) {
case R.id.navigate:
startActivity(new Intent("android.intent.action.VIEW", Uri.parse("http://maps.google.com/maps?daddr=" + latitude + "," + longitude + "&saddr=" + currentLatitude + "," + currentLongitude)));
break;
case R.id.settings:
startActivity(new Intent(context, ChangeLanguageActivity.class));
break;
}
return true;
}
/**
* It fetch the nearest ATM on basis of latitude and longitude.
* @author Ankit
*/
private class GetNearestATM extends AsyncTask<Void, Void, Void> {
String xmlResponse;
ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
progressDialog = new ProgressDialog(context);
progressDialog.setTitle(getString(R.string.app_name));
progressDialog.setMessage(getString(R.string.please_wait));
progressDialog.setIndeterminate(true);
progressDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
if(currentLatitude != 0 && currentLongitude != 0) {
xmlResponse = new Utils().getXmlFromUrl("http://www.bankomaty.sk/service/?n=" + currentLatitude + "&e=" + currentLongitude +
"&t=" + Utils.getFilterSettings(context));
} else {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(context, getString(R.string.no_gps_fetch), Toast.LENGTH_LONG).show();
}
});
}
return null;
}
@Override
protected void onPostExecute(Void result) {
try {
progressDialog.cancel();
} catch(Exception e) {
}
if(xmlResponse != null && !xmlResponse.equals("")) {
XMLParser xmlParser = new XMLParser();
Document document = xmlParser.getDomElement(xmlResponse);
if(document != null) {
NodeList nodeList = document.getElementsByTagName("bankomaty");
if(nodeList.getLength() > 0) {
nodeList = document.getElementsByTagName("bankomat");
for(int index = 0; index < nodeList.getLength(); index++) {
try {
Element element = (Element) nodeList.item(index);
String locationCoordinates[] = xmlParser.getValue(element, "latlng").replaceAll(" ", "").split(",");
double latitude = Double.valueOf(locationCoordinates[0].trim()).doubleValue();
double longitude = Double.valueOf(locationCoordinates[1].trim()).doubleValue();
latLongArrayList.add(new LatLng(latitude, longitude));
String type = xmlParser.getValue(element, "type");
if(type.equals("1")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.first)));
} else if(type.equals("2")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.second)));
} else if(type.equals("3")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.third)));
} else if(type.equals("4")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.fourth)));
} else if(type.equals("5")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.fifth)));
} else if(type.equals("6")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.sixth)));
} else if(type.equals("7")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.seventh)));
} else if(type.equals("8")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.eight)));
} else if(type.equals("9")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ninth)));
}
} catch(Exception e) {
//Exception
}
}
if(!getIntent().getBooleanExtra("isFromSameActivity", false))
setCameraAnimation(map);
if(getIntent().getBooleanExtra("isFromSameActivity", false))
new GetDrivingDirectionsAsync().execute();
map.setInfoWindowAdapter(new PopupAdapter(getLayoutInflater()));
//Marker Click Listener
map.setOnInfoWindowClickListener(new OnInfoWindowClickListener() {
@Override
public void onInfoWindowClick(Marker marker) {
LatLng latLng = marker.getPosition();
latitude = latLng.latitude;
longitude = latLng.longitude;
Intent intent = new Intent(context, AndroidTabLayoutActivity.class);
intent.putExtra("isFromSameActivity", true);
intent.putExtra("selectLatitude", latitude);
intent.putExtra("selectLongitude", longitude);
startActivity(intent);
}
});
}
}
}
}
}
/**
* It fetch the nearest ATM on basis of latitude and longitude from seach on basis of street and city.
* @author Ankit
*/
private class SearchGetNearestATM extends AsyncTask<Void, Void, Void> {
String xmlResponse;
ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
progressDialog = new ProgressDialog(context);
progressDialog.setTitle(getString(R.string.app_name));
progressDialog.setMessage(getString(R.string.please_wait));
progressDialog.setIndeterminate(true);
progressDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
if(LocationMapFragment.searchLatitude != 0 && LocationMapFragment.searchLongitude != 0) {
xmlResponse = new Utils().getXmlFromUrl("http://www.bankomaty.sk/service/?n=" + LocationMapFragment.searchLatitude + "&e=" + LocationMapFragment.searchLongitude +
"&t=" + Utils.getFilterSettings(context));
} else {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(context, getString(R.string.no_gps_fetch), Toast.LENGTH_LONG).show();
}
});
}
return null;
}
@Override
protected void onPostExecute(Void result) {
try {
progressDialog.cancel();
} catch(Exception e) {
}
if(xmlResponse != null && !xmlResponse.equals("")) {
XMLParser xmlParser = new XMLParser();
Document document = xmlParser.getDomElement(xmlResponse);
if(document != null) {
NodeList nodeList = document.getElementsByTagName("bankomaty");
if(nodeList.getLength() > 0) {
nodeList = document.getElementsByTagName("bankomat");
for(int index = 0; index < nodeList.getLength(); index++) {
try {
Element element = (Element) nodeList.item(index);
String locationCoordinates[] = xmlParser.getValue(element, "latlng").replaceAll(" ", "").split(",");
double latitude = Double.valueOf(locationCoordinates[0].trim()).doubleValue();
double longitude = Double.valueOf(locationCoordinates[1].trim()).doubleValue();
latLongArrayList.add(new LatLng(latitude, longitude));
String type = xmlParser.getValue(element, "type");
if(type.equals("1")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.first)));
} else if(type.equals("2")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.second)));
} else if(type.equals("3")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.third)));
} else if(type.equals("4")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.fourth)));
} else if(type.equals("5")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.fifth)));
} else if(type.equals("6")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.sixth)));
} else if(type.equals("7")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.seventh)));
} else if(type.equals("8")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.eight)));
} else if(type.equals("9")) {
map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(new String(xmlParser.getValue(element, "name").getBytes("ISO-8859-1")) + "\nClick to Get Directions")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ninth)));
}
} catch(Exception e) {
//Exception
}
}
if(!getIntent().getBooleanExtra("isFromSameActivity", false))
setCameraAnimation(map);
if(getIntent().getBooleanExtra("isFromSameActivity", false))
new GetDrivingDirectionsAsync().execute();
map.setInfoWindowAdapter(new PopupAdapter(getLayoutInflater()));
//Marker Click Listener
map.setOnInfoWindowClickListener(new OnInfoWindowClickListener() {
@Override
public void onInfoWindowClick(Marker marker) {
LatLng latLng = marker.getPosition();
latitude = latLng.latitude;
longitude = latLng.longitude;
Intent intent = new Intent(context, AndroidTabLayoutActivity.class);
intent.putExtra("isFromSameActivity", true);
intent.putExtra("selectLatitude", latitude);
intent.putExtra("selectLongitude", longitude);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
}
});
}
}
}
}
}
@Override
public void onBackPressed() {
super.onBackPressed();
this.getParent().onBackPressed();
}
/**
* Async Task
*/
private class GetDrivingDirectionsAsync extends AsyncTask<Void, Void, Void> {
ProgressDialog progressDialog;
Document document;
GMapV2Direction md;
@Override
protected void onPreExecute() {
progressDialog = new ProgressDialog(context);
progressDialog.setTitle(getString(R.string.app_name));
progressDialog.setMessage(getString(R.string.please_wait));
progressDialog.setIndeterminate(true);
progressDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
LatLng fromPosition = null;
if(searchLatitude != 0 && searchLongitude != 0)
fromPosition = new LatLng(searchLatitude, searchLongitude);
else
fromPosition = new LatLng(currentLatitude, currentLongitude);
LatLng toPosition = new LatLng(latitude, longitude);
md = new GMapV2Direction();
document = md.getDocument(fromPosition, toPosition, GMapV2Direction.MODE_DRIVING);
return null;
}
@Override
protected void onPostExecute(Void param) {
try {
progressDialog.cancel();
} catch(Exception e) {
}
try {
ArrayList<LatLng> directionPoint = md.getDirection(document);
latLongArrayList.addAll(directionPoint);
setCameraAnimation(map);
PolylineOptions rectLine = new PolylineOptions().width(4).color(Color.BLUE);
for(int i = 0 ; i < directionPoint.size() ; i++) {
rectLine.add(directionPoint.get(i));
}
map.addPolyline(rectLine);
} catch(Exception e) {
setCameraAnimation(map);
}
}
}
/**
* Driving Directions
* @author Ankit
*/
private class GMapV2Direction {
public final static String MODE_DRIVING = "driving";
public GMapV2Direction() { }
public Document getDocument(LatLng start, LatLng end, String mode) {
String url = "http://maps.googleapis.com/maps/api/directions/xml?"
+ "origin=" + start.latitude + "," + start.longitude
+ "&destination=" + end.latitude + "," + end.longitude
+ "&sensor=false&units=metric&mode=driving";
try {
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost(url);
HttpResponse response = httpClient.execute(httpPost, localContext);
InputStream in = response.getEntity().getContent();
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(in);
return doc;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public ArrayList<LatLng> getDirection (Document doc) {
NodeList nl1, nl2, nl3;
ArrayList<LatLng> listGeopoints = new ArrayList<LatLng>();
nl1 = doc.getElementsByTagName("step");
if (nl1.getLength() > 0) {
for (int i = 0; i < nl1.getLength(); i++) {
Node node1 = nl1.item(i);
nl2 = node1.getChildNodes();
Node locationNode = nl2.item(getNodeIndex(nl2, "start_location"));
nl3 = locationNode.getChildNodes();
Node latNode = nl3.item(getNodeIndex(nl3, "lat"));
double lat = Double.parseDouble(latNode.getTextContent());
Node lngNode = nl3.item(getNodeIndex(nl3, "lng"));
double lng = Double.parseDouble(lngNode.getTextContent());
listGeopoints.add(new LatLng(lat, lng));
locationNode = nl2.item(getNodeIndex(nl2, "polyline"));
nl3 = locationNode.getChildNodes();
latNode = nl3.item(getNodeIndex(nl3, "points"));
ArrayList<LatLng> arr = decodePoly(latNode.getTextContent());
for(int j = 0 ; j < arr.size() ; j++) {
listGeopoints.add(new LatLng(arr.get(j).latitude, arr.get(j).longitude));
}
locationNode = nl2.item(getNodeIndex(nl2, "end_location"));
nl3 = locationNode.getChildNodes();
latNode = nl3.item(getNodeIndex(nl3, "lat"));
lat = Double.parseDouble(latNode.getTextContent());
lngNode = nl3.item(getNodeIndex(nl3, "lng"));
lng = Double.parseDouble(lngNode.getTextContent());
listGeopoints.add(new LatLng(lat, lng));
}
}
return listGeopoints;
}
private int getNodeIndex(NodeList nl, String nodename) {
for(int i = 0 ; i < nl.getLength() ; i++) {
if(nl.item(i).getNodeName().equals(nodename))
return i;
}
return -1;
}
private ArrayList<LatLng> decodePoly(String encoded) {
ArrayList<LatLng> poly = new ArrayList<LatLng>();
int index = 0, len = encoded.length();
int lat = 0, lng = 0;
while (index < len) {
int b, shift = 0, result = 0;
do {
b = encoded.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lat += dlat;
shift = 0;
result = 0;
do {
b = encoded.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lng += dlng;
LatLng position = new LatLng((double) lat / 1E5, (double) lng / 1E5);
poly.add(position);
}
return poly;
}
}
/**
* Auto Zoom
* @param map
*/
public void setCameraAnimation(GoogleMap map) {
double[] minMaxLocationsPoints = getMinMaxLocationPoints();
map.animateCamera(CameraUpdateFactory.newLatLngBounds(new LatLngBounds(new LatLng(minMaxLocationsPoints[0],
minMaxLocationsPoints[1]), new LatLng(minMaxLocationsPoints[2], minMaxLocationsPoints[3])),
display.getWidth() , display.getHeight(), 10));
}
/**
* Get the Min and Max Points
* @return Min and Max Location Points
*/
public double[] getMinMaxLocationPoints() {
double[] points = new double[4];
ArrayList<Double> latitudeArrayList = new ArrayList<Double>();
ArrayList<Double> longitudeArrayList = new ArrayList<Double>();
for(int index = 0; index < latLongArrayList.size(); index++) {
LatLng latLong = latLongArrayList.get(index);
latitudeArrayList.add(latLong.latitude);
longitudeArrayList.add(latLong.longitude);
}
Double minLatitude = Collections.min(latitudeArrayList);
Double maxLatitude = Collections.max(latitudeArrayList);
Double minLongitude = Collections.min(longitudeArrayList);
Double maxLongitude = Collections.max(longitudeArrayList);
points[0] = minLatitude;
points[1] = minLongitude;
points[2] = maxLatitude;
points[3] = maxLongitude;
}
}
提前致谢。
