关于java：获取Google Maps的当前位置

Getting the current location for Google Maps

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Possible Duplicate:
What is the simplest and most robust way to get the user’s current location in Android?

我有以下代码在手机上打开谷歌地图并传递目的地的经度+纬度并开始它的位置。我想知道是否有一种方法，以便不必手动输入代码的起始位置，如果我们可以改为以某种方式让代码自动找出用户在哪里？

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add.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent (android.content.Intent.ACTION_VIEW,
Uri.parse("http://maps.google.com/maps?saddr=" + 51.5171 +
"," + 0.1062 +"&daddr=" + 52.6342 +"," + 1.1385));

intent.setComponent(
new ComponentName ("com.google.android.apps.maps",
"com.google.android.maps.MapsActivity"));

startActivity(intent);
}
});

您可以使用此方法：

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public LatLng getLocation(Context ctx)
{
LocationManager lm = (LocationManager) ctx.getSystemService(Context.LOCATION_SERVICE);
List<String> providers = lm.getProviders(true);

/*
* Loop over the array backwards, and if you get an accurate location,
* then break out the loop
*/
Location l = null;

for (int i = providers.size() - 1; i >= 0; i--)
{
l = lm.getLastKnownLocation(providers.get(i));
if (l != null)
break;
}
return new LatLng(l.getLatitude(),l.getLongitude());
}