Utils.java 文件源码

public static String exportResource(Context context, int resourceId, String dirname) {
    String fullname = context.getResources().getString(resourceId);
    String resName = fullname.substring(fullname.lastIndexOf("/") + 1);
    try {
        InputStream is = context.getResources().openRawResource(resourceId);
        File resDir = context.getDir(dirname, Context.MODE_PRIVATE);
        File resFile = new File(resDir, resName);

        FileOutputStream os = new FileOutputStream(resFile);

        byte[] buffer = new byte[4096];
        int bytesRead;
        while ((bytesRead = is.read(buffer)) != -1) {
            os.write(buffer, 0, bytesRead);
        }
        is.close();
        os.close();

        return resFile.getAbsolutePath();
    } catch (IOException e) {
        e.printStackTrace();
        throw new CvException("Failed to export resource " + resName
                + ". Exception thrown: " + e);
    }
}