如何在 google 中的地图中选择不同的路线 android？
How to make different routes selectable in google Maps in android?
我正在开发一个使用大量 google 地图交互的应用程序。在 activity 中，我显示了两点之间的路线。我希望这些路线可以选择，根据用户的选择显示请帮助我。
我在这里附上 activity 的图片：
这里是上面显示的 activity 的代码：
public class RouteActivity extends FragmentActivity {
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
double sl1,sl2,el1,el2;
FrameLayout fl;
TextView distTextView,timeTextView;
String routeArray[];
List<LatLng> list;
List<Polyline> polylineList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_route);
setUpMapIfNeeded();
mMap.getUiSettings().setZoomControlsEnabled(true);
polylineList=new ArrayList<Polyline>();
fl=(FrameLayout)findViewById(R.id.frame_layout);
distTextView=(TextView)findViewById(R.id.distance_textView);
timeTextView=(TextView)findViewById(R.id.time_textView);
String start = getIntent().getStringExtra("start");
String end = getIntent().getStringExtra("end");
Geocoder coder = new Geocoder(this);
List<Address> address;
try {
address = coder.getFromLocationName(start, 5);
if (address == null) {
}
Address location = address.get(0);
sl1=location.getLatitude();
sl2=location.getLongitude();
} catch (IOException e) {
e.printStackTrace();
}
try {
address = coder.getFromLocationName(end, 5);
if (address == null) {
}
Address location = address.get(0);
el1=location.getLatitude();
el2=location.getLongitude();
} catch (IOException e) {
e.printStackTrace();
}
BitmapDescriptor icon = BitmapDescriptorFactory.fromResource(R.drawable.from);
markers[0]=mMap.addMarker(new MarkerOptions().position(new LatLng(sl1, sl2)).title(start).icon(icon));
markers[1]=mMap.addMarker(new MarkerOptions().position(new LatLng(el1, el2)).title(end).icon(icon));
LatLngBounds.Builder builder = new LatLngBounds.Builder();
for (Marker marker : markers) {
builder.include(marker.getPosition());
}
LatLngBounds bounds = builder.build();
CameraUpdate cu=CameraUpdateFactory.newLatLngBounds(bounds,500,500,0);
mMap.moveCamera(cu);
mMap.animateCamera(cu);
String url=makeURL(sl1,sl2,el1,el2);
Log.e("Generated URL ",url);
new MyAsyncTask().execute(url);
fl.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
}
});
mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
@Override
public void onMapClick(LatLng latLng) {
int x=0;
for (Polyline polyline : polylineList)
{
for (LatLng polyCoords : polyline.getPoints()) {
float[] results = new float[1];
Location.distanceBetween(latLng.latitude, latLng.longitude,
polyCoords.latitude, polyCoords.longitude, results);
if (results[0] < 100) {
mMap.clear();
for(Polyline pl:polylineList)
{
if(pl!=polyline) {
mMap.addPolyline(new PolylineOptions().color(Color.GRAY).addAll(pl.getPoints()));
}
else if(pl==polyline)
{
mMap.addPolyline(new PolylineOptions()
.color(Color.BLUE)
.addAll(pl.getPoints()));
}
}
}
}
}
Log.e("PolyLine ",polylineList.toString());
}
});
}
@Override
protected void onResume() {
super.onResume();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
public class MyAsyncTask extends AsyncTask<String,Void,String> {
ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
progressDialog=new ProgressDialog(RouteActivity.this);
progressDialog.setMessage("Finding Route ...");
progressDialog.setCancelable(false);
progressDialog.setIndeterminate(false);
progressDialog.show();
}
@Override
protected String doInBackground(String... str) {
ParserClass parser = new ParserClass();
String json_str = parser.getJSON(str[0], 2000);
Log.e("JSON Data", json_str);
return json_str;
}
@Override
protected void onPostExecute(String s) {
try {
progressDialog.dismiss();
JSONObject jsonRootObject = new JSONObject(s);
JSONArray routeArray=jsonRootObject.getJSONArray("routes");
Log.e("ROUTES ",routeArray.toString());
for(int i=routeArray.length()-1;i>=0;i--) {
JSONObject routes = routeArray.getJSONObject(i);
JSONObject overviewPolylines = routes.getJSONObject("overview_polyline");
JSONArray legs=routes.getJSONArray("legs");
for(int j=0;j<legs.length();j++)
{
JSONObject distObj=legs.getJSONObject(j);
JSONObject distance =distObj.getJSONObject("distance");
String dist=distance.getString("text");
JSONObject duration=distObj.getJSONObject("duration");
String time=duration.getString("text");
Log.e("Route"+i+" DISTANCE ",dist);
Log.e("Route"+i+" TIME ",time);
distTextView.setText("Distance "+dist);
timeTextView.setText("Time "+time);
}
String encodedString = overviewPolylines.getString("points");
Log.e("Waypoint "+i,encodedString);
list = decodePoly(encodedString);
Log.e("List "+i,list.toString());
if(i==0) {
Polyline line = mMap.addPolyline(new PolylineOptions()
.addAll(list)
.width(12)
.color(Color.BLUE)
.geodesic(true)
);
Log.e("PolyLine ",line.toString());
polylineList.add(line);
}
else{
Polyline line = mMap.addPolyline(new PolylineOptions()
.addAll(list)
.width(12)
.color(Color.DKGRAY)
.geodesic(true)
);
polylineList.add(line);
Log.e("PolyLine ",line.toString());
}
}
} catch (JSONException e) {
e.printStackTrace();
}
super.onPostExecute(s);
}
}
private void setUpMap() {
mMap.clear();
}
public void showMap(Double l1,Double l2,String str)
{
LatLng position=new LatLng(l1,l2);
SupportMapFragment fm = (SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map);
GoogleMap googleMap = fm.getMap();
BitmapDescriptor icon = BitmapDescriptorFactory.fromResource(R.drawable.from);
mMap.addMarker(new MarkerOptions().position(new LatLng(l1, l2)).title(str).icon(icon));
CameraUpdate updatePosition = CameraUpdateFactory.newLatLng(position);
CameraUpdate updateZoom=CameraUpdateFactory.zoomTo(15);
googleMap.moveCamera(updatePosition);
googleMap.animateCamera(updateZoom);
}
public String makeURL (double sourcelat, double sourcelog, double destlat, double destlog ){
StringBuilder urlString = new StringBuilder();
urlString.append("https://maps.googleapis.com/maps/api/directions/json");
urlString.append("?origin=");// from
urlString.append(Double.toString(sourcelat));
urlString.append(",");
urlString.append(Double.toString( sourcelog));
urlString.append("&destination=");// to
urlString.append(Double.toString( destlat));
urlString.append(",");
urlString.append(Double.toString( destlog));
urlString.append("&sensor=false&mode=driving&alternatives=true&units=imperial");
urlString.append("&key=AIzaSyD5NOOpYKObjlZbt_-4CUOMi14mObzbGNo");
return urlString.toString();
}
private List<LatLng> decodePoly(String encoded) {
List<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 p = new LatLng((((double) lat / 1E5)),
(((double) lng / 1E5)));
poly.add(p);
}
return poly;
}
}
在 abouce 代码中，我使用 google 方向创建这些路径 api
请帮忙选择不同的路线。谢谢
伙计们，我已经实现了所需的功能，只是对现有代码进行了一些更改，现在可以使用了。感谢您的指导:)
我正在开发一个使用大量 google 地图交互的应用程序。在 activity 中，我显示了两点之间的路线。我希望这些路线可以选择，根据用户的选择显示请帮助我。
我在这里附上 activity 的图片：
这里是上面显示的 activity 的代码：
public class RouteActivity extends FragmentActivity {
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
double sl1,sl2,el1,el2;
FrameLayout fl;
TextView distTextView,timeTextView;
String routeArray[];
List<LatLng> list;
List<Polyline> polylineList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_route);
setUpMapIfNeeded();
mMap.getUiSettings().setZoomControlsEnabled(true);
polylineList=new ArrayList<Polyline>();
fl=(FrameLayout)findViewById(R.id.frame_layout);
distTextView=(TextView)findViewById(R.id.distance_textView);
timeTextView=(TextView)findViewById(R.id.time_textView);
String start = getIntent().getStringExtra("start");
String end = getIntent().getStringExtra("end");
Geocoder coder = new Geocoder(this);
List<Address> address;
try {
address = coder.getFromLocationName(start, 5);
if (address == null) {
}
Address location = address.get(0);
sl1=location.getLatitude();
sl2=location.getLongitude();
} catch (IOException e) {
e.printStackTrace();
}
try {
address = coder.getFromLocationName(end, 5);
if (address == null) {
}
Address location = address.get(0);
el1=location.getLatitude();
el2=location.getLongitude();
} catch (IOException e) {
e.printStackTrace();
}
BitmapDescriptor icon = BitmapDescriptorFactory.fromResource(R.drawable.from);
markers[0]=mMap.addMarker(new MarkerOptions().position(new LatLng(sl1, sl2)).title(start).icon(icon));
markers[1]=mMap.addMarker(new MarkerOptions().position(new LatLng(el1, el2)).title(end).icon(icon));
LatLngBounds.Builder builder = new LatLngBounds.Builder();
for (Marker marker : markers) {
builder.include(marker.getPosition());
}
LatLngBounds bounds = builder.build();
CameraUpdate cu=CameraUpdateFactory.newLatLngBounds(bounds,500,500,0);
mMap.moveCamera(cu);
mMap.animateCamera(cu);
String url=makeURL(sl1,sl2,el1,el2);
Log.e("Generated URL ",url);
new MyAsyncTask().execute(url);
fl.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
}
});
mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
@Override
public void onMapClick(LatLng latLng) {
int x=0;
for (Polyline polyline : polylineList)
{
for (LatLng polyCoords : polyline.getPoints()) {
float[] results = new float[1];
Location.distanceBetween(latLng.latitude, latLng.longitude,
polyCoords.latitude, polyCoords.longitude, results);
if (results[0] < 100) {
mMap.clear();
for(Polyline pl:polylineList)
{
if(pl!=polyline) {
mMap.addPolyline(new PolylineOptions().color(Color.GRAY).addAll(pl.getPoints()));
}
else if(pl==polyline)
{
mMap.addPolyline(new PolylineOptions()
.color(Color.BLUE)
.addAll(pl.getPoints()));
}
}
}
}
}
Log.e("PolyLine ",polylineList.toString());
}
});
}
@Override
protected void onResume() {
super.onResume();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
public class MyAsyncTask extends AsyncTask<String,Void,String> {
ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
progressDialog=new ProgressDialog(RouteActivity.this);
progressDialog.setMessage("Finding Route ...");
progressDialog.setCancelable(false);
progressDialog.setIndeterminate(false);
progressDialog.show();
}
@Override
protected String doInBackground(String... str) {
ParserClass parser = new ParserClass();
String json_str = parser.getJSON(str[0], 2000);
Log.e("JSON Data", json_str);
return json_str;
}
@Override
protected void onPostExecute(String s) {
try {
progressDialog.dismiss();
JSONObject jsonRootObject = new JSONObject(s);
JSONArray routeArray=jsonRootObject.getJSONArray("routes");
Log.e("ROUTES ",routeArray.toString());
for(int i=routeArray.length()-1;i>=0;i--) {
JSONObject routes = routeArray.getJSONObject(i);
JSONObject overviewPolylines = routes.getJSONObject("overview_polyline");
JSONArray legs=routes.getJSONArray("legs");
for(int j=0;j<legs.length();j++)
{
JSONObject distObj=legs.getJSONObject(j);
JSONObject distance =distObj.getJSONObject("distance");
String dist=distance.getString("text");
JSONObject duration=distObj.getJSONObject("duration");
String time=duration.getString("text");
Log.e("Route"+i+" DISTANCE ",dist);
Log.e("Route"+i+" TIME ",time);
distTextView.setText("Distance "+dist);
timeTextView.setText("Time "+time);
}
String encodedString = overviewPolylines.getString("points");
Log.e("Waypoint "+i,encodedString);
list = decodePoly(encodedString);
Log.e("List "+i,list.toString());
if(i==0) {
Polyline line = mMap.addPolyline(new PolylineOptions()
.addAll(list)
.width(12)
.color(Color.BLUE)
.geodesic(true)
);
Log.e("PolyLine ",line.toString());
polylineList.add(line);
}
else{
Polyline line = mMap.addPolyline(new PolylineOptions()
.addAll(list)
.width(12)
.color(Color.DKGRAY)
.geodesic(true)
);
polylineList.add(line);
Log.e("PolyLine ",line.toString());
}
}
} catch (JSONException e) {
e.printStackTrace();
}
super.onPostExecute(s);
}
}
private void setUpMap() {
mMap.clear();
}
public void showMap(Double l1,Double l2,String str)
{
LatLng position=new LatLng(l1,l2);
SupportMapFragment fm = (SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map);
GoogleMap googleMap = fm.getMap();
BitmapDescriptor icon = BitmapDescriptorFactory.fromResource(R.drawable.from);
mMap.addMarker(new MarkerOptions().position(new LatLng(l1, l2)).title(str).icon(icon));
CameraUpdate updatePosition = CameraUpdateFactory.newLatLng(position);
CameraUpdate updateZoom=CameraUpdateFactory.zoomTo(15);
googleMap.moveCamera(updatePosition);
googleMap.animateCamera(updateZoom);
}
public String makeURL (double sourcelat, double sourcelog, double destlat, double destlog ){
StringBuilder urlString = new StringBuilder();
urlString.append("https://maps.googleapis.com/maps/api/directions/json");
urlString.append("?origin=");// from
urlString.append(Double.toString(sourcelat));
urlString.append(",");
urlString.append(Double.toString( sourcelog));
urlString.append("&destination=");// to
urlString.append(Double.toString( destlat));
urlString.append(",");
urlString.append(Double.toString( destlog));
urlString.append("&sensor=false&mode=driving&alternatives=true&units=imperial");
urlString.append("&key=AIzaSyD5NOOpYKObjlZbt_-4CUOMi14mObzbGNo");
return urlString.toString();
}
private List<LatLng> decodePoly(String encoded) {
List<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 p = new LatLng((((double) lat / 1E5)),
(((double) lng / 1E5)));
poly.add(p);
}
return poly;
}
}
在 abouce 代码中，我使用 google 方向创建这些路径 api
请帮忙选择不同的路线。谢谢
伙计们，我已经实现了所需的功能，只是对现有代码进行了一些更改，现在可以使用了。感谢您的指导:)