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Android（谷歌地图标记）

IT知识android谷歌地图

【Android（谷歌地图标记）】一年好景君须记，最是橙黄橘绿时。这篇文章主要讲述Android：谷歌地图标记相关的知识，希望能为你提供帮助。
This is part of a much larger class but I wanted to give enough context to explain the value of GeoCoder. GeoCoder has two methods called getFromLocation() and getFromLocationName() that allow you to capture an address or coordinates.

  1. /**********************************
  2. * Fired every time a user touches the map
  3. * MotionEvent.getAction() lets you determine
  4. *whether a user has lifted their finger
  5. **********************************/
  6. @Override
  7. public boolean onTouchEvent( MotionEvent e, MapView mapView) {
  8. if( e.getAction( ) == 1 ) {
  9. //getProjection() returns screen-pixel coords to lat/lng coordinates
  10. //fromPixels converts the screen coordinates into a GeoPoint
  11. GeoPoint geoPoint = mapView.getProjection( ) .fromPixels(
  12. ( int) e.getX( ) ,
  13. ( int) e.getY( ) ) ;
  14.  
  15. /*
  16. Toast.makeText( getActivity(),
  17. " Location: " + geoPoint.getLatitudeE6() / 1E6 + " , " +
  18. geoPoint.getLongitudeE6() / 1E6,
  19. Toast.LENGTH_SHORT).show();
  20. */
  21.  
  22. //Geocoder converts lat/lng into an address
  23. Geocoder geocoder = new Geocoder( getActivity( ) , Locale.getDefault( ) ) ;
  24.  
  25. try{
  26. //getFromLocation() does the reverse Geo Location
  27. List< Address> addresses = geocoder.getFromLocation(
  28. geoPoint.getLatitudeE6( ) / 1E6,
  29. geoPoint.getLongitudeE6( ) / 1E6,
  30. 1 ) ;
  31. //Capture the address in a String
  32. String addy = " " ;
  33. if( addresses.size( ) > 0 ) {
  34. for ( int i = 0; i < addresses.get( 0) .getMaxAddressLineIndex( ) ; i++ ) {
  35. addy += addresses.get( 0) .getAddressLine( i) + " " ;
  36. }
  37. }
  38. //Present the address using Toast
  39. Toast.makeText( getActivity( ) , addy, Toast.LENGTH_SHORT) .show( ) ;
  40. }
  41. catch( IOException evt ) {
  42. evt.printStackTrace( ) ;
  43. }
  44.  
  45. /**********************************
  46. * Find the Geo Coordinates based on the Name
  47. **********************************/
  48. try{
  49. List< Address> addresses = geocoder.getFromLocationName( " kusc" , 5) ;
  50. String addy = " " ;
  51. if( addresses.size( ) > 0 ) {
  52. geoPoint = new GeoPoint(
  53. ( int) ( addresses.get( 0) .getLatitude( ) * 1E6) ,
  54. ( int) ( addresses.get( 0) .getLongitude( ) * 1E6) ) ;
  55. mapController.animateTo( geoPoint) ;
  56. mapView.invalidate( ) ;
  57. }
  58. //Present the address using Toast
  59. Toast.makeText( getActivity( ) , addy, Toast.LENGTH_SHORT) .show( ) ;
  60. } catch( IOException evt) {
  61. evt.printStackTrace( ) ;
  62. }
  63. }
  64. //onTouchEvent requires a boolean
  65. return false;
  66. }
  67. }


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