How to use id3 plugging in Flutter

Question

Only getting the first letter for every tag, or may be I am wrong somewhere

void info() {
MP3Instance mp3instance = new MP3Instance("/storage/emulated/0/Download/Army_320-(Mr-Jat.in).mp3");
    if(mp3instance.parseTagsSync()){
      print(mp3instance.getMetaTags());
      print(mp3instance.metaTags['Title']);
      print(mp3instance.metaTags['Artist']);
      print(mp3instance.metaTags['Album']);
      print(mp3instance.metaTags['Year']);
      print(mp3instance.metaTags['Genre']);
    }
}

and here is the output

I/flutter ( 6995): {Version: v2.3.0, Title: A
I/flutter ( 6995): A
I/flutter ( 6995): S
I/flutter ( 6995): H
I/flutter ( 6995): 2
I/flutter ( 6995): M

Only the first alphabet of text appears and the stops.

score 1 · Accepted Answer · answered May 30 '20 at 07:56

I printed out the ASCII equivalent of mp3instance.getMetaTags() and realized that the string has some ASCII control characters in it which terminates the print() statement.

After some research I used this method to remove the control characters:

String normalizeString(String s) {
    var encoded = ascii.encode(s.toString());
    List<int> normalized = new List.from(encoded.map((e) => (e < 32) ? 32 : e));
    return ascii.decode(normalized);
}

I printed the normalized string as follows:

 print( "Before normalizing: " + mp3instance.getMetaTags().toString() );
 String normalString = normalizeString( mp3instance.getMetaTags().toString() );
 print( "After normalizing: " + normalString);
 print( "Normalized title: " + mp3instance.metaTags['Title'].toString() );

More resources:

Replace non ASCII character from string

Another id3 tagging flutter library

How to use id3 plugging in Flutter

1 Answers1