LiteToMappedByteBuffer

private MappedByteBuffer loadModelFile(Activity activity, String MODEL_FILE) throws IOException {
        AssetFileDescriptor fileDescriptor = activity.getAssets().openFd(MODEL_FILE);
        FileInputStream inputStream = new FileInputStream(fileDescriptor.getFileDescriptor());
        FileChannel fileChannel = inputStream.getChannel();
        long startOffset = fileDescriptor.getStartOffset();
        long declaredLength = fileDescriptor.getDeclaredLength();
        return fileChannel.map(FileChannel.MapMode.READ_ONLY, startOffset, declaredLength);
    }