How to dynamically generate the raw resource identifier in android?

Question

I am working on a mobile library app. I have a 3-4 db files of books stored in raw folder. If I know the name of the book then I first copy this file to /databases/book_name.db and then access them as required. I use

InputStream fileInputStream = getResources().openRawResource(R.raw.book_name);

for accessing these files.

Now, I want to pass the book name and then dynamically generate the resource identifier R.raw.book_name using the string book_name. Is there a way by which I can generate this identifier?

Answer 1

Use Resources.getIdentifier() method:

int resId = getResources().getIdentifier("raw/book_name", null, this.getPackageName());

If your code not in activity or application, you need to get Context first.

Context context = getContext(); // or getBaseContext(), or getApplicationContext()
int resId = context.getResources().getIdentifier("raw/book_name", null, context.getPackageName());