Accessing Files in the Raw folder in Android

Question

I am working on an exporting function in an Android application. The files are wav files which are stored in the res/raw folder. How can I access the files?

uri = Uri.parse("android.resource://" + getPackageName() + "/raw/" + selection[i]);


            try{
                file[i] = new File(uri.getPath());
                if(file[i].exists()){
                    Log.i("EXIST", "EXIST");
                }else{
                    Log.i("EXIST", "NOT");
                }

            }
            catch(Exception e){
                Log.i("ERROR", "File Not Found");
            }

selection[i] is the filename of the file that I need in the res/raw folder. The code always returns "NOT", which means it has not found the file that I want from the res/raw folder. Can anyone help me please? Thanks.

Answer 1

I'm not sure you can access a resource through a File like that. Here's how I'm reading HTML files in my raw folder:

public static String getStringFromResource(Context context, @RawRes int id) {
    BufferedReader reader = null;

    try {
        StringBuilder stringBuilder = new StringBuilder();
        InputStream inputStream = context.getResources().openRawResource(id);
        reader = new BufferedReader(new InputStreamReader(inputStream));

        String currentLine;
        while ((currentLine = reader.readLine()) != null ) {
            stringBuilder.append(currentLine);
        }
        return stringBuilder.toString();
    } catch (IOException e) {
        Log.e(TAG, "Error opening raw resource: " + id);
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                Log.e(TAG, "Error closing raw resource: " + id, e);
            }
        }
    }

    return null;
}

The key part for you will be the InputStream inputStream = context.getResources().openRawResource(id); call which gets you a stream to the file. Use that stream to write to the output file you are exporting.

Answer 2

This will return a byte array for your raw file:

 Resources res = context.getResources();
    InputStream inputStream = res.openRawResource(rawResource);
    try {
        byte[] b = new byte[inputStream.available()];
        inputStream.read(b);
    } catch (Exception e) {
        // exception thrown
    }