我正在使用 Googlemaps v2 我必须将 latlng 的值，即：routePoints发送到服务器。
我在 onlocationchanged（）中显示 latlng 。
我需要将这些值发送到URL。
这是我的代码。
public class MapDetail extends FragmentActivity implements
GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener, LocationListener,
OnMapLongClickListener {
private static final int GPS_ERRORDIALOG_REQUEST = 9001;
private static final String TAG_SUCCESS = "successfully stored";
GoogleMap mMap;
LocationClient mLocationClient;
Marker marker;
LatLng ll;
LatLng point1;
LatLng cLocation, pLocation;
List<LatLng> routePoints;
private List<MarkerOptions> markerOptions = new ArrayList<MarkerOptions>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (serviceOk()) {
setContentView(R.layout.activity_map);
if (initMap()) {
// mMap.setMyLocationEnabled(true);
mLocationClient = new LocationClient(this, this, this);
mLocationClient.connect();
} else {
Toast.makeText(this, "Map Not Avialable !!", Toast.LENGTH_LONG)
.show();
}
} else {
setContentView(R.layout.activity_main);
}
routePoints = new ArrayList<LatLng>();
}
public boolean serviceOk() {
int isAvailable = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(this);
if (isAvailable == ConnectionResult.SUCCESS) {
return true;
} else if (GooglePlayServicesUtil.isUserRecoverableError(isAvailable)) {
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(isAvailable,
this, GPS_ERRORDIALOG_REQUEST);
dialog.show();
} else {
Toast.makeText(this, "can not connect google play services",
Toast.LENGTH_LONG).show();
}
return false;
}
private boolean initMap() {
if (mMap == null) {
SupportMapFragment mapFrag = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mMap = mapFrag.getMap();
if (mMap != null) {
}
}
return (mMap != null);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.activity:
Intent i = new Intent(this, ComInfo.class);
startActivity(i);
break;
default:
break;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onConnectionFailed(ConnectionResult arg0) {
}
@Override
public void onConnected(Bundle arg0) {
Toast.makeText(this, "Connected To Location Service", Toast.LENGTH_LONG)
.show();
LocationRequest request = LocationRequest.create();
request.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
request.setInterval(5000);
request.setFastestInterval(1000);
mLocationClient.requestLocationUpdates(request, this);
mMap.setOnMapLongClickListener(this);
}
@Override
public void onDisconnected() {
}
@Override
public void onLocationChanged(Location location) {
String msg = "Location:" + location.getLatitude() + ","
+ location.getLongitude();
Toast.makeText(this, msg, Toast.LENGTH_LONG).show();
drawCircle(location);
for (int i = 0; i < this.markerOptions.size(); i++) {
mMap.addMarker(markerOptions.get(i));
}
LatLng ll1 = new LatLng(location.getLatitude(), location.getLongitude());
routePoints.add(ll1);
for (int i = 0; i < routePoints.size(); i++) {
Polyline route = mMap.addPolyline(new PolylineOptions().width(5)
.color(Color.GREEN).geodesic(true).zIndex(10));
route.setPoints(routePoints);
}
new AttemptSave().execute();
}
private void drawCircle(Location location) {
mMap.clear();
LatLng currentPosition = new LatLng(location.getLatitude(),
location.getLongitude());
mMap.addCircle(new CircleOptions().center(currentPosition).radius(50)
.fillColor(0x330000FF).strokeColor(Color.BLUE).strokeWidth(3));
double latitude = location.getLatitude();
double longitude = location.getLongitude();
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(latitude, longitude)).zoom(15f).build();
mMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
}
@Override
protected void onPause() {
mLocationClient.disconnect();
super.onPause();
}
@Override
protected void onResume() {
mLocationClient.connect();
super.onResume();
}
@Override
protected void onStop() {
mLocationClient.disconnect();
super.onStop();
}
@Override
public void onMapLongClick(LatLng point) {
this.point1 = point;
MarkerOptions moMarkerOptions = new MarkerOptions()
.position(point)
.title("se guarda el punto")
.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_RED));
Marker marker = mMap.addMarker(moMarkerOptions);
this.markerOptions.add(moMarkerOptions);
new AttemptSave().execute("test");
}
class AttemptSave extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... args0) {
String res = sendJSON();
Log.d("InputStream", res);
return res;
}
private String sendJSON() {
InputStream inputStream = null;
String result = "";
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("MY_URL");
String json = "";
json = this.getJSONObject().toString();
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("data", json));
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse httpResponse = httpclient.execute(httpPost);
inputStream = httpResponse.getEntity().getContent();
if (inputStream != null)
result = convertInputStreamToString(inputStream);
else
result = "Did not work!";
} catch (IOException e) {
Log.d("InputStream", e.getLocalizedMessage()); // e.getLocalizedMessage());
}
return result;
}
private String convertInputStreamToString(InputStream inputStream)
throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line = "";
String result = "";
while ((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}
private JSONObject getJSONObject() {
JSONObject obj = new JSONObject();
try {
obj.put("id", 1);
obj.put("lat", point1.latitude);
obj.put("long", point1.longitude);
obj.put("track", "");
} catch (JSONException e) {
e.printStackTrace();
}
return obj;
}
protected void onPostExecute(List<List<HashMap<String, String>>> result) {
ArrayList<LatLng> points = null;
PolylineOptions lineOptions = null;
MarkerOptions markerOptions = new MarkerOptions();
for(int i=0;i<result.size();i++){
points = new ArrayList<LatLng>();
lineOptions = new PolylineOptions();
List<HashMap<String, String>> path = result.get(i);
for(int j=0;j<path.size();j++){
HashMap<String,String> point = path.get(j);
double lat = Double.parseDouble(point.get("lat"));
double lng = Double.parseDouble(point.get("lng"));
LatLng position = new LatLng(lat, lng);
points.add(position);
new Saveroute().execute();
}
// Adding all the points in the route to LineOptionslineOptions.addAll(points) lineOptions.width(2);lineOptions.color(Color.RED);
}
}
}
class Saveroute extends AsyncTask<String, String, String >{
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
return null;
}}
}
答案 0 :(得分：0)
在onLocationChanged(Location location)中，您没有初始化point1，请按照与onMapLongClick()
@Override
public void onLocationChanged(Location location) {
point1=new LatLng(location.getLatitude(),location.getLongitude());
...
}