qq_20258523
2019-05-28 09:52
采纳率: 2.6%
浏览 806

Android 将assets文件夹内的内容写入到SD卡中

在网上看到一些方法都是文件的单个写入,如果assets文件夹内有复杂的文件夹目录结构,怎么把里面的所有文件夹及其子文件一起写入到SD卡中呢?

  • 写回答
  • 关注问题
  • 收藏
  • 邀请回答

1条回答 默认 最新

  • springchunye 2019-05-28 10:08
    已采纳

    public static void CopyAssets(Context context, String assetDir, String dir) {
    String[] files;
    try {
    files = context.getResources().getAssets().list(assetDir);
    } catch (IOException e1) {
    return;
    }
    File mWorkingPath = new File(dir);
    // if this directory does not exists, make one.
    if (!mWorkingPath.exists()) {
    if (!mWorkingPath.mkdirs()) {

        }
    }
    
    for (int i = 0; i < files.length; i++) {
        try {
            String fileName = files[i];
            // we make sure file name not contains '.' to be a folder.
            if (!fileName.contains(".")) {
                if (0 == assetDir.length()) {
                    CopyAssets(context, fileName, dir + fileName + "/");
                } else {
                    CopyAssets(context, assetDir + "/" + fileName, dir+ fileName + "/");
                }
                continue;
            }
            File outFile = new File(mWorkingPath, fileName);
            if (outFile.exists())
                outFile.delete();
            InputStream in = null;
            if (0 != assetDir.length())
                in = context.getAssets().open(assetDir + "/" + fileName);
            else
                in = context.getAssets().open(fileName);
            OutputStream out = new FileOutputStream(outFile);
    
            // Transfer bytes from in to out
            byte[] buf = new byte[1024];
            int len;
            while ((len = in.read(buf)) > 0) {
                out.write(buf, 0, len);
            }
    
            in.close();
            out.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    

    }

    已采纳该答案
    1 打赏 评论

相关推荐 更多相似问题