FileReader csv:FileNotFoundException:无法将此文件作为文件描述符打开；不能将其作为文件描述符打开.它可能被压缩了 [英] FileReader csv : FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed

问题描述

我想读取一个csv文件.为此，我找到了像这样使用的CSVReader:

I would like to read a csv file. For that, I found CSVReader which I use like this :

List myEntries = null;
    try {
        AssetFileDescriptor descriptor = getAssets().openFd("file.csv");
        CSVReader csvReader = new CSVReader(new FileReader(descriptor.getFileDescriptor()), ',', '"');
        myEntries = csvReader.readAll();
        csvReader.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

但是我得到了这个错误: FileNotFoundException:该文件不能作为文件描述符打开；它可能被压缩了.

But I got this error: FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed.

我的文件位于资产文件夹中.

My file is located in assets folder.

我已经看到此线程:

I have already seen this thread: java.io.FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed It did not help me at all.

所以，我必须做错什么，但是怎么办? 我应该将文件放在另一个文件夹中并通过其他方法打开吗?

So, I must do something wrong, but what? Should I put my file on another folder and open it by another method?

推荐答案

Android压缩所有资产，以下类型除外:

Android compresses all assets, except for the following types:

".jpg", ".jpeg", ".png", ".gif",
".wav", ".mp2", ".mp3", ".ogg", ".aac",
".mpg", ".mpeg", ".mid", ".midi", ".smf", ".jet",
".rtttl", ".imy", ".xmf", ".mp4", ".m4a",
".m4v", ".3gp", ".3gpp", ".3g2", ".3gpp2",
".amr", ".awb", ".wma", ".wmv"

如果您对构建过程有足够的控制权，则可以使用 带有zip或aapt的"-0"标志可添加资产.

If you have sufficient control over the build process, you can use the "-0" flag with zip or aapt to add the assets.

-0指定其他扩展名，此类文件将不会 被压缩存储在.apk中.空字符串表示不 完全压缩任何文件.

-0 specifies an additional extension for which such files will not be stored compressed in the .apk. An empty string means to not compress any files at all.

如果您有机会使用CSVReader进行操作，请将csv文件存放在资产文件夹之外的其他位置，例如sdcard.

If you have the chance to do it with your CSVReader, deposit your csv file somewhere other than the assets folder, like sdcard.

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