如何在 android 的原始文件夹中加载 *.mat 文件

Question

我尝试使用 JMatIO 在 Android 4.4 中加载一个 .mat 文件。

当 .mat 文件在外部存储中时它运行良好，但当文件在应用程序的 raw 文件夹中时它不起作用。目前，应用程序找不到任何 *.mat 个文件。日志只打印消息 "fail to load matrix file".

下面是我使用的代码：

try {
        mfr = new MatFileReader("android.resource://" + getPackageName() + "/raw/rm.mat");
} catch (IOException e) {
        e.printStackTrace();
        Log.d(TAG, "fail to load matrix file");
        System.exit(0);
}
if (mfr != null) {
        Log.d(TAG, "Success to load matrix file");
}

如何才能成功加载文件？

Answer 1

您似乎无法使用以下代码正确访问文件：

mfr = new MatFileReader("android.resource://" + getPackageName() + "/raw/rm.mat");

据我了解，您正在尝试访问位于 \res\raw\ 文件夹中的文件。这通常使用 R.raw.filname_without_extension 来完成。在您的情况下，您应该尝试：

mfr = new MatFileReader(getResources().openRawResource(R.raw.rm), MatFileType.Regular);

如果您仍有问题，请查看这些资源：

文档：Accessing Resources

Access to Original Files

While uncommon, you might need access your original files and directories. If you do, then saving your files in res/ won't work for you, because the only way to read a resource from res/ is with the resource ID. Instead, you can save your resources in the assets/ directory.

Files saved in the assets/ directory are not given a resource ID, so you can't reference them through the R class or from XML resources. Instead, you can query files in the assets/ directory like a normal file system and read raw data using AssetManager.

However, if all you require is the ability to read raw data (such as a video or audio file), then save the file in the res/raw/ directory and read a stream of bytes using openRawResource()
JMatIO 来源：The relevant MatFileReader signature
所以问题：R.raw.anything cannot be resolved
所以问题：How to get File from R.raw
所以问题：How to read file from res/raw by name

如何在 android 的原始文件夹中加载 *.mat 文件

How to load *.mat file in raw folder of android

file-io

android

ioexception

mat-file

android-resources