My Code

getAsset() async {

    print('Test: ${getAssets.noticeList}'); //DEBUG

    String notice;

    for (notice in getAssets.noticeList) {
      assetResponse = await http.get(noticeDownloadURL + notice);

      documentDirectory = await getApplicationDocumentsDirectory();
      firstPath = documentDirectory.path + "/notices";
      filePathAndName = documentDirectory.path + '/notices/$notice';
    }
    //await Directory(firstPath).create(recursive: true);
    File file2 = new File(filePathAndName);
    file2.writeAsBytesSync(assetResponse.bodyBytes);

    setState(() {
      print('check2');
      imageData = filePathAndName;
      dataLoaded = true;
    });
  }