isGpsActive

public static void isLocationEnabled(final Context context) {
        LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        boolean gps_enabled = false;
        boolean network_enabled = false;
        try {
            gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
        } catch (Exception ex) {
            FLog.d("Location", ex.toString());
        }
        try {
            network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
        } catch (Exception ex) {
            FLog.d("Location", ex.toString());
        }
        if (!gps_enabled && !network_enabled) {
            // notify user
            final AlertDialog.Builder dialog = new AlertDialog.Builder(context);
            dialog.setTitle(context.getString(R.string.location_404));
            dialog.setMessage(context.getResources().getString(R.string.gps_network_not_enabled));
            dialog.setPositiveButton(context.getResources().getString(R.string.gotit), new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface paramDialogInterface, int paramInt) {
                    // TODO Auto-generated method stub
                    Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                    context.startActivity(myIntent);
                    //get gps
                }
            });
            dialog.setNegativeButton(context.getString(R.string.Cancel), new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface paramDialogInterface, int paramInt) {
                    // TODO Auto-generated method stub
                    paramDialogInterface.dismiss();
                }
            });
            dialog.show();
        }
    }