android获取并解析Google路线

我在网上找到了这个示例，我将尝试使用它。折线解码示例

private List<GeoPoint> deprePoly(String enpred) {  List<GeoPoint> poly = new ArrayList<GeoPoint>();  int index = 0, len = enpred.length();  int lat = 0, lng = 0;  while (index < len) {      int b, shift = 0, result = 0;      do {          b = enpred.charAt(index++) - 63;          result |= (b & 0x1f) << shift;          shift += 5;      } while (b >= 0x20);      int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));      lat += dlat;      shift = 0;      result = 0;      do {          b = enpred.charAt(index++) - 63;          result |= (b & 0x1f) << shift;          shift += 5;      } while (b >= 0x20);      int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));      lng += dlng;      GeoPoint p = new GeoPoint((int) (((double) lat / 1E5) * 1E6),(int) (((double) lng / 1E5) * 1E6));      poly.add(p);  }  return poly;}