谷歌地图Android的API V2创建一个新的LocationSource

问题描述：

A LocationSource 的Google地图Android的API V2 。

有用于使用GoogleMap作为位置提供。默认情况下，该位置源由手机上的GPS模块提供的。

It is used for googlemap as the location provider. By default, the location source is provided by the gps module on the phone.

但现在我想用一个又一个的位置源，位置数据将定期发送到Android设备上。

But now I want to use a another Location source, the location data will be sent to android device periodically.

我不知道如何来实现这个接口。是否有任何的例子在那里？谁能帮我呢？该文件并没有说什么。

I have no idea how to implement this interface. Are there any example out there? Can anyone help me with it? The document did not say anything about it.

答

下面是一个简单的执行 LocationSource 接口。就我而言，我注册了GPS和网络位置提供商。正如刚才@CommonsWare，实施很可能取决于你的需求。我建议阅读有关位置服务的官方文档，以便更好地理解如何利用你的需求，并节省电池电量

Here is a simple implementation of LocationSource interface. In my case I'm registering both GPS and Network location providers. As mentioned by @CommonsWare, implementation may very depending on your needs. I would suggest reading official documentation about Location service in order to better understand how to utilize your needs and save some battery power

public class CurrentLocationProvider implements LocationSource, LocationListener
{
    private OnLocationChangedListener listener;
    private LocationManager locationManager;

    public CurrentLocationProvider(Context context)
    {
        locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
    }

    @Override
    public void activate(OnLocationChangedListener listener)
    {
        this.listener = listener;
        LocationProvider gpsProvider = locationManager.getProvider(LocationManager.GPS_PROVIDER);
        if(gpsProvider != null)
        {
            locationManager.requestLocationUpdates(gpsProvider.getName(), 0, 10, this);
        }

        LocationProvider networkProvider = locationManager.getProvider(LocationManager.NETWORK_PROVIDER);;
        if(networkProvider != null) {
            locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000 * 60 * 5, 0, this);
        }
    }

    @Override
    public void deactivate()
    {
        locationManager.removeUpdates(this);
    }

    @Override
    public void onLocationChanged(Location location)
    {
        if(listener != null)
        {
            listener.onLocationChanged(location);
        }
    }

    @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

    }
}

这里是我会怎么使用这个类：

And here is how I would use this class:

protected void setUpMap() {
    //init routine
    .......

    this.map.setLocationSource(new CurrentLocationProvider(this));
    .......       
}

修改请注意，这个解决方案已经过时了！您需要使用 FusedLocationProviderApi与 href="https://developer.android.com/reference/com/google/android/gms/common/api/GoogleApiClient.html"相对=nofollow> GoogleApiClient 跟踪当前位置

EDIT Please not that this solution is obsolete! You need to use FusedLocationProviderApi in conjunction with GoogleApiClient for tracking current location

谷歌地图Android的API V2创建一个新的LocationSource

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