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Is there an API for Google Maps navigation in Android?
最近我将 android 开发作为一种爱好，希望开发一款可以使用 Google map 查找和跟踪用户位置的应用程序。
一旦应用程序拥有 GPS 锁，应用程序就可以通过使用覆盖类绘制路线来跟踪他们的移动。
我见过类似的开源应用程序，例如 Mytracks，但它们现在对我来说太复杂了。
他是我下面没有导入的代码。
我想做的是创建一组地理点。每次位置更改时，都会创建一个新的地理点。然后，我尝试使用 for 循环遍历每个地理点并在它们之间绘制一条路径。
理想情况下，我喜欢创建一个看起来像这张照片的应用程序
public class Tracking extends MapActivity implements LocationListener {
LocationManager locman;
LocationListener loclis;
Location Location;
private MapView map;
List<GeoPoint> geoPointsArray = new ArrayList<GeoPoint>();
private MapController controller;
String provider = LocationManager.GPS_PROVIDER;
double lat;
double lon;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.map);
initMapView();
initMyLocation();
locman = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
//locman.requestLocationUpdates(provider,60000, 100,loclis);
//Location = locman.getLastKnownLocation(provider);
}
/** Find and initialize the map view. */
private void initMapView() {
map = (MapView) findViewById(R.id.map);
controller = map.getController();
map.setSatellite(false);
map.setBuiltInZoomControls(true);
}
/** Find Current Position on Map. */
private void initMyLocation() {
final MyLocationOverlay overlay = new MyLocationOverlay(this, map);
overlay.enableMyLocation();
overlay.enableCompass(); // does not work in emulator
overlay.runOnFirstFix(new Runnable() {
public void run() {
// Zoom in to current location
controller.setZoom(24);
controller.animateTo(overlay.getMyLocation());
}
});
map.getOverlays().add(overlay);
}
@Override
public void onLocationChanged(Location location) {
if (Location != null){
lat = Location.getLatitude();
lon = Location.getLongitude();
GeoPoint New_geopoint = new GeoPoint((int)(lat*1e6),(int)(lon*1e6));
controller.animateTo(New_geopoint);
}
}
class MyOverlay extends Overlay{
public MyOverlay(){
}
public void draw(Canvas canvas, MapView mapv, boolean shadow){
super.draw(canvas, mapv, shadow);
Projection projection = map.getProjection();
Path p = new Path();
for (int i = 0; i < geoPointsArray.size(); i++) {
if (i == geoPointsArray.size() - 1) {
break;
}
Point from = new Point();
Point to = new Point();
projection.toPixels(geoPointsArray.get(i), from);
projection.toPixels(geoPointsArray.get(i + 1), to);
p.moveTo(from.x, from.y);
p.lineTo(to.x, to.y);
}
Paint mPaint = new Paint();
mPaint.setStyle(Style.STROKE);
mPaint.setColor(0xFFFF0000);
mPaint.setAntiAlias(true);
canvas.drawPath(p, mPaint);
super.draw(canvas, map, shadow);
}
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}}