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[Android] 現在日時の取得方法

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概要

端末の現在日時を「yyyy/MM/dd HH:mm:ss」形式の文字列で取得する。

サンプルコード

MainActivity.java
/**
 * 現在日時をyyyy/MM/dd HH:mm:ss形式で取得する.<br>
 */
public static String getNowDate(){
    final DateFormat df = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
    final Date date = new Date(System.currentTimeMillis());
    return df.format(date);
}

ポイント

  1. SimpleDateFormatのコンストラクタの引数で取得する日時形式を決定している。
  2. System.currentTimeMillis()で端末時刻を通算ミリ秒で取得し、Dataのコンストラクタの引数に渡すことで現在時刻のDataインスタンスを取得している。
  3. DataFormat#format()に現在時刻のDataインスタンスを引数として渡し、現在日時を指定した形式で取得している。
zuccyi
IT Dancer
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