为什么SharedPreferences不保存我的字符串？

Question

I have an ArrayList that I'm writing out as a string:

blastScores  = new ArrayList<String>();
blastScores.add("Hello");
blastScores.add("Yo");
prefs.edit().putString(CaptureActivity.BLAST_SCORES, blastScores.toString());

Whenever I read it in, it is always null:

    String blastScoresString = prefs.getString(CaptureActivity.BLAST_SCORES, null);

Why is this?

Answer 1

您是否对SharedPreferences.Editor对象commit()了commit() ？