Kotlin-将UTC转换为当地时间

DJ2*_*DJ2 2 android kotlin android-studio

我正在尝试将UTC字符串日期转换为本地时间,因此采用了更具可读性的格式。textView我的活动布局中有一个:

<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" />
Run Code Online (Sandbox Code Playgroud)

在我的活动中:

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
Run Code Online (Sandbox Code Playgroud)

publishedAt字符串是从API调用此格式"2018-12-10T19:48:39Z"。如何将ZULU时间格式转换为本地时间?

BBu*_*eld 5

尝试使用扩展功能

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)
}
Run Code Online (Sandbox Code Playgroud)

用法:

"2018-09-10 22:01:00".toDate().formatTo("dd MMM yyyy")
Run Code Online (Sandbox Code Playgroud)

输出:“ 2018年9月11日”