java - 在 Android 中将纪元时间转换为日期并将日期转换为纪元时间

Question

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Answer 1

使用 Joda-Time 2.3 的示例代码。

Unix 时间是 seconds since beginning of 1970 的数量在 UTC/GMT。

How can I get an epoch time for the above date format in android

DateTime dateTimeInUtc = new DateTime( "2011-07-19T18:23:20+0000", DateTimeZone.UTC );
long secondsSinceUnixEpoch = ( dateTimeInUtc.getMillis() / 1000 ); // Convert milliseconds to seconds.

……和……

how to convert a epoch time to the above date format.

String dateTimeAsString = new DateTime( secondsSinceUnixEpoch * 1000, DateTimeZone.UTC ).toString();

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将这些值转储到控制台......

System.out.println( "dateTimeInUtc: " + dateTimeInUtc );
System.out.println( "secondsSinceUnixEpoch: " + secondsSinceUnixEpoch );
System.out.println( "dateTimeAsString: " + dateTimeAsString );

奖励:调整到另一个时区。

DateTime dateTimeMontréal = dateTimeInUtc.withZone( DateTimeZone.forID( "America/Montreal" ) );