java - How to create an AsyncTask properly -


i new java , since question belongs time sensitive project work, dont have time learn asynctasks. question is:

how construct asynctaskout of following code?

the goal draw route on map. fill arraylistwith 2 geopoints (start-location , destination of route). roadmanager supposed send waypoints server sends me route.

buildroadoverlay method draws route on map.

    roadmanager roadmanager = new osrmroadmanager(this);      arraylist<geopoint> waypoints = new arraylist<geopoint>();     geopoint mylocation = new geopoint(51.488978, 6.746994);     waypoints.add(location);     waypoints.add(mylocation);     road road = roadmanager.getroad(waypoints);

i guess has go in onpostexecute -method, right?:

    polyline roadoverlay = roadmanager.buildroadoverlay(road);     map.getoverlays().add(roadoverlay);

the variable location upper code originates different method, intend start async task. meaning, need transmit variable asynctask when calling it, not sure how exactly.

this initialization of variable location:

geopoint location = new geopoint(double.parsedouble(place.getlongitude()),      double.parsedouble(place.getlatitude()));

put time consuming task in doinbackground(), udpate view in onpostexecute().

public void drawrouteasync() {     geopoint location = new geopoint(double.parsedouble(place.getlongitude()),             double.parsedouble(place.getlatitude()));     geopoint mylocation = new geopoint(51.488978, 6.746994);      new routeasynctask().execute(location, mylocation); }  private class routeasynctask extends asynctask<geopoint, void, road> {     @override     protected road doinbackground(geopoint... params) {         arraylist<geopoint> waypoints = new arraylist<geopoint>();         waypoints.add(params[0]); // location         waypoints.add(params[1]); // mylocation         roadmanager roadmanager = new osrmroadmanager(mcontext); // context         road road = roadmanager.getroad(waypoints); // time consuming         return road;     }      @override     protected void onpostexecute(road road) {         polyline roadoverlay = roadmanager.buildroadoverlay(road);         map.getoverlays().add(roadoverlay); // update view     } }

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