Android地图开发中的地理编码与地理反编码

核心提示：地理反编码，其中MapOverlay为地图图层上的叠加图层，Android地图开发中的地理编码与地理反编码(4)，用于标识的显示以及点击事件的捕捉，class MapOverlay extends com.google.android.maps.Overlay{@Overridepublic boolean draw(

地理反编码，其中MapOverlay为地图图层上的叠加图层，用于标识的显示以及点击事件的捕捉。

class MapOverlay extends com.google.android.maps.Overlay

{

@Override

public boolean draw(Canvas canvas, MapView mapView,

boolean shadow, long when)

{

//...

}

@Override

public boolean onTouchEvent(MotionEvent event, MapView mapView)

{

//---when user lifts his finger---

if (event.getAction() == 1) {

GeoPoint p = mapView.getProjection().fromPixels(

(int) event.getX(),

(int) event.getY());

Geocoder geoCoder = new Geocoder(

getBaseContext(), Locale.getDefault());

try {

List

addresses = geoCoder.getFromLocation(

p.getLatitudeE6() / 1E6,

p.getLongitudeE6() / 1E6, 1);

String add = "";

if (addresses.size() > 0)

{

for (int i=0; i

i++)

add += addresses.get(0).getAddressLine(i) + " ";

}

Toast.makeText(getBaseContext(), add, Toast.LENGTH_SHORT).show();

}

catch (IOException e) {

e.printStackTrace();

}

return true;

}

else

return false;

}

}

class MapOverlay extends com.google.android.maps.Overlay

{

@Override

public boolean draw(Canvas canvas, MapView mapView,

boolean shadow, long when)

{

//...

}

@Override

public boolean onTouchEvent(MotionEvent event, MapView mapView)

{

//---when user lifts his finger---

if (event.getAction() == 1) {

GeoPoint p = mapView.getProjection().fromPixels(

(int) event.getX(),

(int) event.getY());

Geocoder geoCoder = new Geocoder(

getBaseContext(), Locale.getDefault());

try {

List

addresses = geoCoder.getFromLocation(

p.getLatitudeE6() / 1E6,

p.getLongitudeE6() / 1E6, 1);

String add = "";

if (addresses.size() > 0)

{

for (int i=0; i

i++)

add += addresses.get(0).getAddressLine(i) + " ";

}

Toast.makeText(getBaseContext(), add, Toast.LENGTH_SHORT).show();

}

catch (IOException e) {

e.printStackTrace();

}

return true;

}

else

return false;

}

}