有没有办法从在线文件更新字符串数组（Android）

Question

我正在开发一个图片库应用程序，我在其中从 URL 加载图像。我已将图像 URL 存储在字符串数组中：

public static String[] IMAGES = new String[]{
     "https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTybItEfE2Xu-Or72BHw8uZf19_mV2Kr8cuuU8kKYrVbeZPXIeX-Q",
     "https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTybItEfE2Xu-Or72BHw8uZf19_mV2Kr8cuuU8kKYrVbeZPXIeX-Q",
     "https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTybItEfE2Xu-Or72BHw8uZf19_mV2Kr8cuuU8kKYrVbeZPXIeX-Q",
     };

但是如何从在线文件更新字符串数组而不是手动添加 URL， 有没有办法从在线文件中更新字符串数组

完整代码：

package com.nostra13.example.universalimageloader;


public final class Constants {

    public static final String[] IMAGES = new String[] {

            "http://tabletpcssource.com/wp-content/uploads/2011/05/android-logo.png",
            "http://simpozia.com/pages/images/stories/windows-icon.png",
            "http://radiotray.sourceforge.net/radio.png",
            "http://www.bandwidthblog.com/wp-content/uploads/2011/11/twitter-logo.png",
            "http://weloveicons.s3.amazonaws.com/icons/100907_itunes1.png",
            "http://weloveicons.s3.amazonaws.com/icons/100929_applications.png",
            "http://www.idyllicmusic.com/index_files/get_apple-iphone.png",
            "http://www.frenchrevolutionfood.com/wp-content/uploads/2009/04/Twitter-Bird.png",
            "http://3.bp.blogspot.com/-ka5MiRGJ_S4/TdD9OoF6bmI/AAAAAAAAE8k/7ydKtptUtSg/s1600/Google_Sky%2BMaps_Android.png",
            "http://www.desiredsoft.com/images/icon_webhosting.png",
            "http://goodereader.com/apps/wp-content/uploads/downloads/thumbnails/2012/01/hi-256-0-99dda8c730196ab93c67f0659d5b8489abdeb977.png",
            "http://1.bp.blogspot.com/-mlaJ4p_3rBU/TdD9OWxN8II/AAAAAAAAE8U/xyynWwr3_4Q/s1600/antivitus_free.png",
            "http://cdn3.iconfinder.com/data/icons/transformers/computer.png",
            "http://cdn.geekwire.com/wp-content/uploads/2011/04/firefox.png?7794fe",
            "https://ssl.gstatic.com/android/market/com.rovio.angrybirdsseasons/hi-256-9-347dae230614238a639d21508ae492302340b2ba",
            "http://androidblaze.com/wp-content/uploads/2011/12/tablet-pc-256x256.jpg",
            "http://www.theblaze.com/wp-content/uploads/2011/08/Apple.png",
            "http://1.bp.blogspot.com/-y-HQwQ4Kuu0/TdD9_iKIY7I/AAAAAAAAE88/3G4xiclDZD0/s1600/Twitter_Android.png",
            "http://3.bp.blogspot.com/-nAf4IMJGpc8/TdD9OGNUHHI/AAAAAAAAE8E/VM9yU_lIgZ4/s1600/Adobe%2BReader_Android.png",
            "http://cdn.geekwire.com/wp-content/uploads/2011/05/oovoo-android.png?7794fe",
            "http://icons.iconarchive.com/icons/kocco/ndroid/128/android-market-2-icon.png",
            "http://thecustomizewindows.com/wp-content/uploads/2011/11/Nicest-Android-Live-Wallpapers.png",
            "http://c.wrzuta.pl/wm16596/a32f1a47002ab3a949afeb4f",
            "http://macprovid.vo.llnwd.net/o43/hub/media/1090/6882/01_headline_Muse.jpg",

    };

    private Constants() {
    }

    public static class Config {
        public static final boolean DEVELOPER_MODE = false;
    }

    public static class Extra {
        public static final String IMAGES = "com.nostra13.example.universalimageloader.IMAGES";
        public static final String IMAGE_POSITION = "com.nostra13.example.universalimageloader.IMAGE_POSITION";
    }
}

Answer 1

您可能应该将结果存储在服务器上，然后让设备查询您的服务器以获取 JSON 格式的结果，然后在 JSON 数据中使用该图像集合并以这种方式处理它。因为这个结果可能会改变，所以您应该在每次启动应用程序时都这样做（当然，您必须根据自己的程度进行调整）。

Answer 2

使用 coma(,) 创建文件

https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTybItEfE2Xu-Or72BHw8uZf19_mV2Kr8cuuU8kKYrVbeZPXIeX-Q,
https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTybItEfE2Xu-Or72BHw8uZf19_mV2Kr8cuuU8kKYrVbeZPXIeX-Q,
https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTybItEfE2Xu-Or72BHw8uZf19_mV2Kr8cuuU8kKYrVbeZPXIeX-Q

1) 从服务器上传的文件中获取数据并在res得到响应

2) 调用方法String filecontentString = readContentFromResponse(res);

public String readContentFromResponse(String res) {
    BufferedReader reader = null;
    StringBuilder sb = new StringBuilder();
    try {
      reader = new BufferedReader(new InputStreamReader(new FileInputStream(new File(res))));
      String line = null;
      while ((line = reader.readLine()) != null) {
        sb.append(line);
      }
    } catch (IOException e) {
      Log.e("TAG",e);
    } finally {
      if (reader != null) {
        try {
          reader.close();
        } catch (IOException e) {
          Log.e("TAG",e);
        }
      }
    }
    return sb.toString();
  }

3) 然后创建空字符串数组

String[] IMAGES ={};

IMAGES = filecontentString.split(",");