MediaMetadataReteriver in Android api-30 returns null

MediaDuration.class

private void  getMediaDuration(String filePathforPlayback){
        MediaMetadataRetriever retriever = new MediaMetadataRetriever();
        try {
            retriever.setDataSource(getActivityContext, Uri.fromFile(new File(filePathforPlayback)));
            String fileDuration = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
            Log.i("MyActivity", "fileDuration---=>" + fileDuration);
            retriever.release();
        }catch (Exception ex){ex.printStackTrace();}finally {
            retriever=null;
        }
    }