Android 百度地图 自定义绘制时会出现 空指针 求大神解答

  /**
 * 填充已经完成的地级市
 *
 * @param
 */
private void fillColor() {
    search = DistrictSearch.newInstance();
    search.setOnDistrictSearchListener(mFillListener);
    search.searchDistrict(new DistrictSearchOption().cityName(mDone.get(0).getName()).districtName(mDone.get(0).getName()));


}

/**
* 绘制以完成城市
*/
private OnGetDistricSearchResultListener mFillListener = new OnGetDistricSearchResultListener() {
@Override
public void onGetDistrictResult(DistrictResult districtResult) {
if (null == districtResult || districtResult.error == SearchResult.ERRORNO.RESULT_NOT_FOUND) {
return;
}
if (districtResult.error == SearchResult.ERRORNO.NO_ERROR) {
String cityName = districtResult.getCityName();
List> polylines = districtResult.getPolylines();

            for (int i = 0; i < polylines.size(); i++) {

// polylines.get(i)
PolygonOptions options = new PolygonOptions().points(polylines.get(i)).fillColor(0x50ff0000);
mBaiduMap.addOverlay(options);
// addFillColor(polylines.get(i),mMap.get(cityName));
// new PolygonOptions().points(polylines).fillColor()
}
if (mDone.size() == index) {
search.destroy();
return;
}
search.searchDistrict(new DistrictSearchOption().cityName(mDone.get(index).getName()));
index++;
}

    }
};

最好把报错信息贴出来，不然看不出哪里空指针