Study Notes on Android: Baidu map (search for bus transfer routes and transitoverlay)

Bus Transfer Route Search and transitoverlay

Here, only Java code is provided. For XML code, refer to: learning notes for Android and learning Baidu Map

Important code:

Mkplannode start = new mkplannode (); // start point: Tiananmen start.pt = new geopoint (INT) (40.003834809598516*1e6), (INT) (116.3263213634491*1e6 )); // set the central mapcontroller of the map. setcenter (start.pt); mkplannode end = new mkplannode (); // end point: nest end.pt = new geopoint (INT) (39.99142*1e6), (INT) (116.39026999999998*1e6); // sets the driving route search policy. The time is prioritized, the minimum fee is required, or the distance is the shortest./** ebus_time_first * Public static final int ebus_time_first * Public Transport retrieval policy constant: time First * ebus_transfer_first * Public static final int ebus_transfer_first * Public Transport retrieval policy constant: minimum transfer * ebus_assist_first * Public static final int ebus_assist_first * Public Transport retrieval policy constant: minimum walking distance * ebus_no_subway * Public static final int ebus_no_subway * Public Transit retrieval policy constant: Excluding Metro * // you can specify a travel route search policy, time First, minimum transfer, minimum walking distance, or no subway mksearch. settransitpolicy (mksearch. ebus_transfer_first); mksearch. transitsearch ("Beijing", start, end); // The city name must be set.

Implement ongettransitrouteresult (mktransitrouteresult, INT) of mysearchlistener and display the search result:

@ Overridepublic void ongettransitrouteresult (mktransitrouteresult result, int ierror) {If (result = NULL) {return;} transitoverlay = new transitoverlay (mymapactivity. this, mmapview); // only one scheme is shown here as an example of transitoverlay. setdata (result. getplan (0); mmapview. getoverlays (). add (transitoverlay );}

API:

Transitsearch

Public intTransitsearch(Java. Lang. String city, mkplannode start, mkplannode end)

Search bus routes.

Asynchronous function, which returns the ongettransitrouteresult method notification in the mksearchlistener.

Parameters:

City-city name, used for retrieval in which city

Start-the start point of the search. You can specify the start point by using the keyword or coordinate.

End-the end point of the search. You can specify the end point by using the keyword or coordinate.

Return Value:

0 is returned for success; otherwise-1 is returned.

Settransitpolicy

Public intSettransitpolicy(INT Policy)

Set route planning policies.

The parameter is a policy constant. Valid for next search

Parameters:

Policy-ebus_time_first: time first; ebus_transfer_first: less transfer; ebus_assist_first: less walk; ebus_no_subway: Non-Subway

Return Value:

0 is returned for success; otherwise-1 is returned.

Specific implementation:

Package xiaosi. baidumap; import android. app. alertdialog; import android. content. dialoginterface; import android. OS. bundle; import COM. baidu. mapapi. bmapmanager; import COM. baidu. mapapi. geopoint; import COM. baidu. mapapi. mkaddrinfo; import COM. baidu. mapapi. mkdrivingrouteresult; import COM. baidu. mapapi. mkplannode; import COM. baidu. mapapi. mkpoiinfo; import COM. baidu. mapapi. mkpoiresult; import COM. baidu. mapapi. mkse Arch; import COM. baidu. mapapi. mksearchlistener; import COM. baidu. mapapi. mktransitrouteresult; import COM. baidu. mapapi. mkwalkingrouteresult; import COM. baidu. mapapi. mapactivity; import COM. baidu. mapapi. mapcontroller; import COM. baidu. mapapi. mapview; import COM. baidu. mapapi. poioverlay; import COM. baidu. mapapi. routeoverlay; import COM. baidu. mapapi. transitoverlay; public class baidumapactivity extends mapactivi Ty {/** called when the activity is first created. */private bmapmanager mapmanager = NULL; private string key = "Hangzhou"; private mapview = NULL; private mksearch; private mapcontroller = NULL; @ overridepublic void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. main); mapmanager = new bmapman Ager (getapplication (); mapmanager. init (Key, null); super. initmapactivity (mapmanager); mapview = (mapview) findviewbyid (R. id. mapview); // enables the built-in zoom control mapview. setbuiltinzoomcontrols (true); // get control of mmapview, which can be used to control and drive translation and zoom mapcontroller = mapview. getcontroller (); // sets the map zoom level mapcontroller. setzoom (12); mksearch = new mksearch (); // note that only one mksearchlistener is supported. The last setting prevails over mksearch. init (mapmanager, new mysearchlisten Er (); mkplannode start = new mkplannode (); // start point: Tiananmen start.pt = new geopoint (INT) (40.003834809598516*1e6), (INT) (116.3263213634491*1e6); // sets the map's central mapcontroller. setcenter (start.pt); mkplannode end = new mkplannode (); // end point: nest end.pt = new geopoint (INT) (39.99142*1e6), (INT) (116.39026999999998*1e6); // sets the driving route search policy, with time first, minimum cost, or minimum distance./** ebus_time_first * Public static final int ebus_time_first * Public Transport Retrieval policy constant: Time First * ebus_transfer_first * Public static final int ebus_transfer_first * Public Transport retrieval policy constant: minimum transfer * ebus_assist_first * Public static final int ebus_assist_first * Public Transport retrieval policy constant: minimum walking distance * ebus_no_subway * Public static final int ebus_no_subway * Public Transit retrieval policy constant: Excluding Metro * // you can specify a travel route search policy, time First, minimum transfer, minimum walking distance, or no subway mksearch. settransitpolicy (mksearch. ebus_transfer_first); mksearch. transitsearch ("Beijing", start, end); // you must set the city name} public Class mysearchlistener implements mksearchlistener {public void ongetaddrresult (mkaddrinfo arg0, int arg1) {/*** return the address information search result. Parameter: arg0-arg1-error number of the search result. 0 indicates that the search result is correct and the result contains related results. 100 indicates that the search result is correct, no relevant address information */} public void ongetdrivingrouteresult (mkdrivingrouteresult arg0, int arg1) {/** returns the driving route search result. Parameter: arg0-arg1-error number of the search result. 0 indicates that the */} public void ongetpoiresult (mkpoiresult arg0, int arg1, int arg2) is returned. {/** the poi search result is returned. Parameter: arg0-search result arg1-return result type: mksearch. type_poi_list mksearch. type_area_poi_list mksearch. type_city_list arg2-error number. 0 indicates that the public void ongettransitrouteresult (mktransitrouteresult arg0, int arg1) is returned. Parameter: arg0-arg1-error number of the search result. 0 indicates that a correct result is returned. When mkevent is returned. error_route_addr indicates that the start or end point is ambiguous. Call the getaddrresult method of mktransitrouteresult to obtain the recommended start or end point information */If (arg0 = NULL) {return ;} transitoverlay = new transitoverlay (baidumapactivity. this, mapview); // only one scheme is shown here as an example of transitoverlay. setdata (arg0.getplan (0); mapview. getoverlays (). add (transitoverlay);} public void ongetwalkingrouteresult (mkwalkingrouteresu Lt arg0, int arg1) {/** return the walking route search result. Parameter: arg0-arg1-error number of the search result. 0 indicates that the returned result is correct */}}@ overrideprotected Boolean isroutedisplayed () {return false;} @ overrideprotected void ondestroy () {If (mapmanager! = NULL) {mapmanager. Destroy (); mapmanager = NULL;} super. ondestroy () ;}@ overrideprotected void onpause () {If (mapmanager! = NULL) {mapmanager. Stop () ;}super. onpause () ;}@ overrideprotected void onresume () {If (mapmanager! = NULL) {mapmanager. Start () ;}super. onresume ();}}