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Twitter Kitで取得できるTwitterクラスのcreatedAtは、型がStringなのでDateとして扱うためにはparseする必要があります。


private static final String DATE_FORMAT_TWITTER = "EEE MMM dd HH:mm:ss ZZZZZ yyyy";

public static Date convertToDate(String twitterDate) {
    // 第2引数のLocaleをセットしないとエラーになるので注意。
    SimpleDateFormat sf = new SimpleDateFormat(DATE_FORMAT_TWITTER, Locale.ENGLISH);
    try {
        return sf.parse(twitterDate);
    } catch (ParseException e) {
        Log.e(TAG, e.getMessage());
        return null;
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