How to access a file from asset/raw directory

问题

with this below code i'm trying to access the file which is stored in asset/raw folder, but getting null and

E/ERR: file:/android_asset/raw/default_book.txt (No such file or directory)

error, my code is:

private void implementingDefaultBook() {
    String filePath = Uri.parse("file:///android_asset/raw/default_book.txt").toString();
    File   file     = new File(filePath);
    try {
        FileInputStream stream      = new FileInputStream(file);
    } catch (Exception e) {
        e.printStackTrace();
        Log.e("ERR ", e.getMessage());
    } catch (OutOfMemoryError e) {
        e.printStackTrace();
    }
}

回答1:

Place your text file in the /assets directory under the Android project and use AssetManager class as follows to access it.

AssetManager am = context.getAssets();
InputStream is = am.open("default_book.txt");

Or you can also put the file in the /res/raw directory, from where the file can be accessed by an id as follows

InputStream is = 
context.getResources().openRawResource(R.raw.default_book);

回答2:

Assets and resources are files on your development machine. They are not files on the device.

For assets, use open() on AssetManager to get an InputStream on your asset.

Also, FWIW:

• Uri.parse("file:///android_asset/raw/default_book.txt").toString() is pointless, as it gives you the same string that you started with

• file:///android_asset/ only works for WebView

回答3:

As the actual question wasn't sufficiently answered, here we go

InputStream is = context.getAssets().openFd("raw/"+"filename.txt")

context can be this or getActivity() or basically any other context

Important is to include the folder before the filename separated by an /

回答4:

InputStream is = getAssets().open("default_book.txt");

来源：https://stackoverflow.com/questions/45908648/how-to-access-a-file-from-asset-raw-directory