Только что сам узнал, следующий код не проверен / не очищен должным образом, но выполняет задачу:
/**
* This will write a custom ID3 tag (TXXX).
* This works only with MP3 files (Flac with ID3-Tag not tested).
* @param description The description of the custom tag i.e. "catalognr"
* There can only be one custom TXXX tag with that description in one MP3 file
* @param text The actual text to be written into the new tag field
* @return True if the tag has been properly written, false otherwise
*/
public boolean setCustomTag(AudioFile audioFile, String description, String text){
FrameBodyTXXX txxxBody = new FrameBodyTXXX();
txxxBody.setDescription(description);
txxxBody.setText(text);
// Get the tag from the audio file
// If there is no ID3Tag create an ID3v2.3 tag
Tag tag = audioFile.getTagOrCreateAndSetDefault();
// If there is only a ID3v1 tag, copy data into new ID3v2.3 tag
if(!(tag instanceof ID3v23Tag || tag instanceof ID3v24Tag)){
Tag newTagV23 = null;
if(tag instanceof ID3v1Tag){
newTagV23 = new ID3v23Tag((ID3v1Tag)audioFile.getTag()); // Copy old tag data
}
if(tag instanceof ID3v22Tag){
newTagV23 = new ID3v23Tag((ID3v11Tag)audioFile.getTag()); // Copy old tag data
}
audioFile.setTag(newTagV23);
}
AbstractID3v2Frame frame = null;
if(tag instanceof ID3v23Tag){
frame = new ID3v23Frame("TXXX");
}
else if(tag instanceof ID3v24Tag){
frame = new ID3v24Frame("TXXX");
}
frame.setBody(txxxBody);
try {
tag.addField(frame);
} catch (FieldDataInvalidException e) {
e.printStackTrace();
return false;
}
try {
audioFile.commit();
} catch (CannotWriteException e) {
e.printStackTrace();
return false;
}
return true;
}