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在位置更改时将标记设置为当前位置的动画

google-maps-android-api-2 google-maps-markers google-maps android

Sophie · 技术社区 · 7 年前

以下是我使用的:

private void autoAnimateMarker() {

    mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);

    mMap.getUiSettings().setZoomControlsEnabled(true);

    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }

    mMap.setMyLocationEnabled(true);

    LatLng fromLocation = new LatLng(-33.904438, 151.249852); 
    LatLng toLocation = new LatLng(-33.905823, 151.252422);
    Marker marker = mMap.addMarker(new MarkerOptions().position(fromLocation));
    MarkerAnimation.animateMarkerToICS(marker, toLocation, new LatLngInterpolator.Spherical());

    mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(fromLocation, 17F));
}

然后在内部调用它 onMapReady(...)

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;

    autoAnimateMarker();

}

https://stackoverflow.com/a/34582595/3585072

目前方法看起来像这样,我需要放在这里,根据位置变化动态移动我的标记:

@Override
public void onLocationChanged(Location location)
{
    Toast.makeText(this, "Location Changed " + location.getLatitude()
            + location.getLongitude(), Toast.LENGTH_LONG).show();

    mLastLocation = location;
    if (mCurrLocationMarker != null) {
        mCurrLocationMarker.remove();
    }

    //Place current location marker
    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
    MarkerOptions markerOptions = new MarkerOptions();
    markerOptions.position(latLng);
    markerOptions.title("Current Position");
    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
    mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);

    //move map camera
    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,11));
}

4 回复 | 直到 7 年前

SO Profile 7 年前

这是 final solution 我提供给到 current location

LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());

if(ourGlobalMarker == null) { // First time adding marker to map
    ourGlobalMarker = mGoogleMap.addMarker(new MarkerOptions().position(latLng)
            .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ROSE)));
    MarkerAnimation.animateMarkerToICS(ourGlobalMarker, latLng, new LatLngInterpolator.Spherical());
    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, 18));
} else {
    MarkerAnimation.animateMarkerToICS(ourGlobalMarker, latLng, new LatLngInterpolator.Spherical());
    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, 18));
}

Feel free to use this code and let me know if you need any update on this.

arjun babu 7 年前

做一件事,放一个每2秒重复一次的背景线程。删除上一个标记并将标记设置在此线程内。我认为这是一种可能的方式。如果移动,经度和纬度也会发生变化,因此标记每2秒移动一次。

Dorukhan Arslan 7 年前

当您的位置发生变化时,无需删除标记并将其再次添加到地图上。您可以按如下方式设置标记的位置。

https://gist.github.com/broady/6314689

如果位置更新 :

public void onLocationChanged(Location location) {
    LatLng toLocation = new LatLng(location.getLatitude(), location.getLongitude());
    if (fromLocation != null) {
        mAnchorMarker.setPosition(fromLocation);
        MarkerAnimation.animateMarkerToICS(mAnchorMarker, toLocation, new LatLngInterpolator.Spherical());
    }
    fromLocation = toLocation;
}

如果位置更新 间隔太短

public void onLocationChanged(Location location) {
    LatLng toLocation = new LatLng(location.getLatitude(), location.getLongitude());
    mAnchorMarker.setPosition(toLocation);
}

onMapReady 而不是 onLocationChanged

UsamaAmjad 6 年前

MarkerAnimation API 版本下面是我如何在我的应用程序中做到这一点。

Marker mCurrLocationMarker = null;
LatLng latLng;

@Override
public void onLocationChanged(Location location){

    latLng = new LatLng(location.getLatitude(), location.getLongitude());
    MarkerOptions markerOptions = new MarkerOptions();
    markerOptions.position(latLng);
    markerOptions.title("My Location");
    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));

    if(mCurrLocationMarker == null) { // Add marker and move camera on first time
        mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
        mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, 13));
    } else { // Update existing marker position and move camera if required
        mCurrLocationMarker.setPosition(latLng);
//        mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, 13));
        }
}