Read raw folder content

Question

I wolud like to read entire raw project folder content (that contains some .mp3 files). This is how i try to read folder content:

Uri uri = Uri.parse("android.resource://" + this.getPackageName() + "/raw/");
    File file = new File(uri.getPath());
    File[] files = file.listFiles();
    for (int i = 0; i < files.length; i++) {
        Log.i("ADASDAS", files[i].getName());
    }

But i obtain a NullPointerException on files object. What's wrong? The exception is on files.length call.

Put you mp3 file in assets and list it as here http://stackoverflow.com/a/16235429/1173794 — HotIceCream, Jan 22 '15 at 22:45

score 0 · Answer 1 · answered Jan 22 '15 at 22:05

What's wrong?

Pretty much everything:

a Uri is not a File, so you cannot pass getPath() to File and expect it to work
resources are not files on the device, but rather are entries in an APK file, and so you cannot iterate over them with File objects
the android.resource Uri structure points to resources, not types of resources (e.g., a specific raw resource)

There really isn't a great way to iterate over raw resources. The best not-great way is to use Java reflection to iterate over all R.raw fields.

Read raw folder content

1 Answers1