Question

我希望以1分钟的间隔获取更新的位置，以便将标记放在地图上，同时使其他应用程序可以在我移动时看到我当前的位置。

所以这里＆＃39;我的代码，但伤心地说它赢得了＆＃39;即使代码已经是onLocationChanged方法中T更新的位置。但我不确定我的代码是否正确。

@Override
public void onLocationChanged(Location location) {

    mLastLocation = location;
    if (mCurrLocationMarker != null) {
        mCurrLocationMarker.remove();
    }
    latlng = new LatLng(location.getLatitude(), location.getLongitude());
    lat = String.valueOf(location.getLatitude());
    lLong = String.valueOf(location.getLongitude());

    driverID = pref.getString("driverID", "");

    final Query userName = ref.orderByChild("username").equalTo(username);
    userName.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            for (DataSnapshot snapShot : dataSnapshot.getChildren()) {
                if (!snapShot.child("latitude").equals(lat) || !snapShot.child("longitude").equals(lLong)) {
                    snapShot.getRef().child("latitude").setValue(lat);
                    snapShot.getRef().child("longitude").setValue(lLong);
                    snapShot.getRef().child("currentLocation").setValue(strOrigin);
                    Toast.makeText(MapsActivity.this, "old lat: " + snapShot.child("latitude").getValue().toString() + "\nnew lat: " + lat +
                            "\nold long: " + snapShot.child("longitude").getValue().toString() + "\nnew long: " + lLong, Toast.LENGTH_LONG).show();
                }
            }
            markerOptions = new MarkerOptions();
            markerOptions.position(latlng);
            markerOptions.title("Current Location");
            markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
            mCurrLocationMarker = mMap.addMarker(markerOptions);

            //move map camera
            mMap.moveCamera(CameraUpdateFactory.newLatLng(latlng));
            mMap.animateCamera(CameraUpdateFactory.zoomTo(11));
        }

        @Override
        public void onCancelled(FirebaseError firebaseError) {
            Toast.makeText(MapsActivity.this, "on cancelled child latlng: " + firebaseError.getMessage(), Toast.LENGTH_SHORT).show();
        }
    });

    Geocoder geocoder;
    List<android.location.Address> addresses;
    geocoder = new Geocoder(this, Locale.getDefault());

    StringBuilder result = new StringBuilder();

    try {
        addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);

        if (addresses.size() > 0) {
            Address address = addresses.get(0);
            result.append(address.getAddressLine(0)).append(", ");
            result.append(address.getLocality()).append(", ");
            result.append(address.getCountryName());
        }

        strOrigin = result.toString();
        Toast.makeText(MapsActivity.this, "origin" + strOrigin, Toast.LENGTH_SHORT).show();
        // onSendOrigin(r);
    } catch (IOException e) {
        e.printStackTrace();
    }
    //stop location updates
    if (mGoogleApiClient != null) {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
    }\
}

Answer 1

看起来你正在打电话：

        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);

在onLocationChanged方法中。这将在第一次调用onLocationChanged后立即停止位置更新。

尝试删除该行，看看它是否有效。您应该只在完成使用位置服务后调用removeLocationUpdates，或者如果您的应用暂停/停止

如何以1分钟ANDROID的间隔获取更新的位置

1 个答案: