传递ArrayList <Object>返回主活动（Android）

Question

我有一个ArrayList < Object>其中Object是我创建的类的实例。我想将这个新的数组列表传递回主要活动，以将其放入navigationdrawer项目中。

如何将ArrayList < Object>从活动传递回主活动？

我曾尝试bundle.getParcelableArrayList但它告诉我，“为类型参数T推断Object类型是不在其范围，应实行android.os.parcelable”

这里是我的代码：

public void createPlaylist(String playlistName, ArrayList<Song> newPlaylistSongsArray) { 
    Intent returnIntent = new Intent(); 
    Bundle b = new Bundle(); 
    b.putParcelableArrayList("array", (ArrayList<? extends Parcelable>) newPlaylistSongsArray); 
    returnIntent.putExtra("playListName", playlistName); 
    returnIntent.putExtra("array", newPlaylistSongsArray); 
    setResult(Activity.RESULT_OK,returnIntent); 
    finish(); 
} 

和：

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (requestCode == 1) { 
     if (resultCode == Activity.RESULT_OK){ 
      String newPlaylistName = data.getStringExtra("playListName"); 
      Bundle b = getIntent().getExtras(); 
      final ArrayList<Song> newPlaylist = b.getParcelableArrayList("array"); 
      Toast.makeText(MP3Player.this, "New Playlist Created", Toast.LENGTH_LONG).show(); 
     } 
     if (resultCode == Activity.RESULT_CANCELED) { 
      Toast.makeText(MP3Player.this, "Shit went wrong yo!", Toast.LENGTH_LONG).show(); 
     } 
    } 
}