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我正在编写一个代码,它会带来当前的位置,但它不会给我这个位置,因为它从来不会调用onLocationChanged()
。是否有任何方法可以找到位置。
mobileLocation在这种情况下即将到达0,所以执行进入else块。
我的代码是
public class FindLocation {
private LocationManager locManager;
private LocationListener locListener;
private Location mobileLocation;
private String provider;
public FindLocation(Context ctx){
locManager = (LocationManager) ctx.getSystemService(Context.LOCATION_SERVICE);
locListener = new LocationListener() {
@Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onLocationChanged(Location location) {
System.out.println("mobile location is in listener="+location);
mobileLocation = location;
}
};
locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, locListener);
if (mobileLocation != null) {
locManager.removeUpdates(locListener);
String londitude = "Londitude: " + mobileLocation.getLongitude();
String latitude = "Latitude: " + mobileLocation.getLatitude();
String altitiude = "Altitiude: " + mobileLocation.getAltitude();
String accuracy = "Accuracy: " + mobileLocation.getAccuracy();
String time = "Time: " + mobileLocation.getTime();
Toast.makeText(ctx, "Latitude is = "+latitude +"Longitude is ="+londitude, Toast.LENGTH_LONG).show();
} else {
System.out.println("in find location 4");
Toast.makeText(ctx, "Sorry location is not determined", Toast.LENGTH_LONG).show();
}
}
}
可能是你的代码比LocationManager更快,后者可能还没有调用onLocationChanged()。更改代码以获得最后一个已知位置,或等到你的locListener被调用时:
locManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 1000, 1, locListener); mobileLocation = locManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); if (mobileLocation != null) {
我在真正的设备上运行我的应用程序。我使用网络而不是GPS,onLocationChanged叫做:
locMan.requestSingleUpdate(LocationManager.NETWORK_PROVIDER, this, null);