I'm trying to convert a UTC string date to local time, so it's in a more readable format.
I have a textView
that in my activity layout:
<TextView
android:id="@+id/dateTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/titleTv"
tools:text="Published Date" />
In my activity:
class FullArticleActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_full_article)
val articleJson = intent.getStringExtra(ARTICLE_KEY)
if(!articleJson.isNullOrBlank()) {
val article = Gson().fromJson<Article>(articleJson, Article::class.java)
val formatter = SimpleDateFormat("yyyy-MM-dd HH:mm:ssZ", Locale.getDefault())
formatter.timeZone = TimeZone.getTimeZone("UTC")
val formattedDate = formatter.parse(article.publishedAt)
titleTv.text = article.title
//UTC string
dateTv.text = article.publishedAt
contentTv.text = article.content
The publishedAt
string is in this format from the api call "2018-12-10T19:48:39Z"
. How can I convert this ZULU time format to local time?
Add the local time offset to the UTC time. For example, if your local time offset is -5:00, and if the UTC time is shown as 11:00, add -5 to 11. The time setting when adjusted for offset is 06:00 (6:00 A.M.). Note The date also follows UTC format.
Use the following code. TimeZone defaultTimeZone = TimeZone. getDefault(); String strDefaultTimeZone = defaultTimeZone. getDisplayName(false, TimeZone.
UTC time in ISO-8601 is 08:19:49Z.
Times are expressed in UTC (Coordinated Universal Time), with a special UTC designator ("Z"). Times are expressed in local time, together with a time zone offset in hours and minutes. A time zone offset of "+hh:mm" indicates that the date/time uses a local time zone which is "hh" hours and "mm" minutes ahead of UTC.
Try using Extension Functions
fun String.toDate(dateFormat: String = "yyyy-MM-dd HH:mm:ss", timeZone: TimeZone = TimeZone.getTimeZone("UTC")): Date {
val parser = SimpleDateFormat(dateFormat, Locale.getDefault())
parser.timeZone = timeZone
return parser.parse(this)
}
fun Date.formatTo(dateFormat: String, timeZone: TimeZone = TimeZone.getDefault()): String {
val formatter = SimpleDateFormat(dateFormat, Locale.getDefault())
formatter.timeZone = timeZone
return formatter.format(this)
}
Usage:
"2018-09-10 22:01:00".toDate().formatTo("dd MMM yyyy")
Output: "11 Sep 2018"
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