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AndroidでrailsのDateTimeをパースし、ローカルロケール時刻テキストに変換

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RailsのDateTimeをandroidローカル時間のテキストに変換するコード。
RailsでDateTimeとして保存している場合、そのまま出力した場合、"2015-06-30T13:00:50.000Z"のように出力される。

public final static String TIME_FORMAT = "yy/MM/dd HH:mm:ss";

//UTC標準時刻をローカル時間のテキストに変換する。
public String toLocalTime(String utcTime) {
	
	try {
		Time t = new Time();
    	t.parse3339(utcTime);
    	long msec = t.normalize(false);
    	Date d = new Date( msec );
    	SimpleDateFormat df = new SimpleDateFormat();

		return  df.format(d);
	} catch (TimeFormatException e) {
  		return null;
    }
}
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