fix bug: android call preparePlayer 2nd never callback

[leconio]

  Future<void> preparePlayer(String path, [double? volume]) async {
    path = Uri.parse(path).path;

    await _readAudioFile(path);
    if ((_playerState == PlayerState.readingComplete &&
        _audioFilePath != null)) {
      final isPrepared = await AudioWaveformsInterface.instance
          .preparePlayer(path, _playerKey.toString(), volume);  <<<<<<<< block here
      if (isPrepared) {
        _maxDuration = await getDuration();
        setPlayerState(PlayerState.initialized);
      }
      notifyListeners();
    } else {
      throw "Can not prepare player without reading audio file";
    }
  }

[ujas-m-simformsolutions]

@leconio Can you please share the issue you were having? And you can use the same player for another audio you need to just call stop before calling preparePlayer for another audio

[leconio]

Thanks, I run the example, I found the WaveBubble not update after recode a voice, It's a blank Bubble. The isRecoding state not update. The reason is preparePlayer not callback. Then I found the android api preparePlayer just only call once time because of a flag isPlayerPrepared. And the ios api is work very well.

[ujas-m-simformsolutions]

@leconio isPlayerPrepared's default value is already false and for updating UI based on the PlayerState I would recommend using the onPlayerStateChanged stream instead of using a listener or just playerState.

[ujas-m-simformsolutions]

closing this PR due to inactivity.