在android中通过gps显示当前位置
我正在开发一个应用程序,它应该在Android上的在android中通过gps显示当前位置,android,google-maps,gps,Android,Google Maps,Gps,我正在开发一个应用程序,它应该在Android上的谷歌地图中显示设备的当前位置。问题是我没有得到设备的准确或接近位置 我的课程是: public class GPSLocatorActivity extends MapActivity { private MapView mapView; private MapController mapController; private LocationManager locationManager; private Lo
谷歌地图中显示设备的当前位置。问题是我没有得到设备的准确或接近位置
我的课程是:
public class GPSLocatorActivity extends MapActivity {
private MapView mapView;
private MapController mapController;
private LocationManager locationManager;
private LocationListener locationListener;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationListener = new GPSLocationListener();
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
0,
0,
locationListener);
mapView = (MapView) findViewById(R.id.mapView);
// enable Street view by default
// mapView.setStreetView(true);
// enable to show Satellite view
mapView.setSatellite(true);
// enable to show Traffic on map
mapView.setTraffic(true);
mapView.setBuiltInZoomControls(true);
// myLocationOverlay=new MyLocationOverlay(this,mapView);
mapController = mapView.getController();
mapController.setZoom(16);
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
private class GPSLocationListener implements LocationListener
{
@Override
public void onLocationChanged(Location location) {
if (location != null) {
GeoPoint point = new GeoPoint(
(int) (location.getLatitude() * 1E6),
(int) (location.getLongitude() * 1E6));
/* Toast.makeText(getBaseContext(),
"Latitude: " + location.getLatitude() +
" Longitude: " + location.getLongitude(),
Toast.LENGTH_SHORT).show();*/
mapController.animateTo(point);
mapController.setZoom(16);
// add marker
MapOverlay mapOverlay = new MapOverlay();
mapOverlay.setPointToDraw(point);
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
String address = ConvertPointToLocation(point);
Toast.makeText(getBaseContext(), address, Toast.LENGTH_SHORT).show();
mapView.invalidate();
}
}
public String ConvertPointToLocation(GeoPoint point) {
String address = "";
Geocoder geoCoder = new Geocoder(
getBaseContext(), Locale.getDefault());
try {
List<Address> addresses = geoCoder.getFromLocation(
point.getLatitudeE6() / 1E6,
point.getLongitudeE6() / 1E6, 1);
if (addresses.size() > 0) {
for (int index = 0; index < addresses.get(0).getMaxAddressLineIndex(); index++)
address += addresses.get(0).getAddressLine(index) + " ";
}
}
catch (IOException e) {
e.printStackTrace();
}
return address;
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
class MapOverlay extends Overlay
{
private GeoPoint pointToDraw;
public void setPointToDraw(GeoPoint point) {
pointToDraw = point;
}
public GeoPoint getPointToDraw() {
return pointToDraw;
}
@Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) {
super.draw(canvas, mapView, shadow);
// convert point to pixels
Point screenPts = new Point();
mapView.getProjection().toPixels(pointToDraw, screenPts);
// add marker
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.red);
canvas.drawBitmap(bmp, screenPts.x, screenPts.y - 24, null); // 24 is the height of image
return true;
}
}
}
公共类GPSLocatorActivity扩展了MapActivity{
私有地图视图;
专用地图控制器;
私人场所经理场所经理;
私有位置侦听器位置侦听器;
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
locationManager=(locationManager)getSystemService(Context.LOCATION\u服务);
locationListener=新的GPSLocationListener();
locationManager.RequestLocationUpdate(
LocationManager.GPS\u提供程序,
0,
0,
位置(监听器);
mapView=(mapView)findViewById(R.id.mapView);
//默认情况下启用街景
//mapView.setStreetView(真);
//启用以显示卫星视图
mapView.setSatellite(真);
//启用以在地图上显示流量
mapView.setTraffic(true);
mapView.SetBuilTinZoomControl(真);
//myLocationOverlay=新建myLocationOverlay(此为地图视图);
mapController=mapView.getController();
mapController.setZoom(16);
}
@凌驾
受保护的布尔值isRouteDisplayed(){
返回false;
}
私有类GPSLocationListener实现LocationListener
{
@凌驾
已更改位置上的公共无效(位置){
如果(位置!=null){
地质点=新的地质点(
(int)(location.getLatitude()*1E6),
(int)(location.getLongitude()*1E6));
/*Toast.makeText(getBaseContext(),
“纬度:”+位置。getLatitude()+
“经度:”+location.getLongitude(),
吐司。长度(短)。show()*/
mapController.animateTo(点);
mapController.setZoom(16);
//添加标记
MapOverlay MapOverlay=新的MapOverlay();
mapOverlay.setPointToDraw(点);
List ListoForLays=mapView.getOverlays();
listOfOverlays.clear();
添加(映射覆盖);
字符串地址=转换点位置(点);
Toast.makeText(getBaseContext(),地址,Toast.LENGTH_SHORT).show();
mapView.invalidate();
}
}
公共字符串转换点定位(地理点){
字符串地址=”;
地理编码器地理编码器=新地理编码器(
getBaseContext(),Locale.getDefault();
试一试{
列表地址=geoCoder.getFromLocation(
point.getLatitudeE6()/1E6,
point.getLongitudeE6()/1E6,1);
如果(地址.size()>0){
for(int index=0;index
我在Mainfest文件中添加了权限:
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
我已经添加了权限,并对地图使用了精确的Google Api密钥。您是否尝试过这样做
使用此选项可以获取当前位置的纬度和经度。然后传递值以获取地图
public class MyLocationListener implements LocationListener
{
@Override
public void onLocationChanged(Location loc)
{
loc.getLatitude();
loc.getLongitude();
String Text = “My current location is: “ +
“Latitud = “ + loc.getLatitude() +
“Longitud = “ + loc.getLongitude();
Toast.makeText( getApplicationContext(),
Text,
Toast.LENGTH_SHORT).show();
}
@Override
public void onProviderDisabled(String provider)
{
Toast.makeText( getApplicationContext(),
“Gps Disabled”,
Toast.LENGTH_SHORT ).show();
}
@Override
public void onProviderEnabled(String provider)
{
Toast.makeText( getApplicationContext(),
“Gps Enabled”,
Toast.LENGTH_SHORT).show();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
}
}
示例链接
我尝试了这两个例子……但在我的例子中,我希望用户通过Gps或网络获得当前位置。那是在我启动地图时……地图应显示用户当前位置……我尝试了许多教程,但无法获得用户当前位置。Plz Plz Plz Plz help me…..这里我为您编辑了检查..希望它能帮助您..否则请使用dropbox将完整代码发送给我..我会尝试..非常感谢@janmejoy..非常感谢..非常感谢..我现在无法找到我的位置,非常感谢您.再次非常感谢...:()))您使用的是Android map apiv2吗..我正在使用“Google Maps Android v1 API Key”这是您实际得到的结果。在结果中,我得到的地图总是以“Tulsa”位置启动。它没有显示我当前的位置。它没有收到实际的纬度和经度..对。。