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KotlinTips: getValueSafely 安全取值 - 技术小黑屋

 4 years ago
source link: https://droidyue.com/blog/2020/03/22/kotlin-tips-get-value-safely/?
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KotlinTips: getValueSafely 安全取值

Mar 22nd, 2020

  • 安全取值，增加稳定性
  • 规避繁琐的显式try-catch处理
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/**
 * 安全的获取值的信息，其过程中发生异常会自动处理，返回null
 * getValueAction 取值操作，可能发生异常
 * */
inline fun <T> getValueSafely(getValueAction: () -> T?): T? {
    return try {
        getValueAction()
    } catch(t: Throwable) {
        t.printStackTrace()
        null
  }
}

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fun testGetValueSafely() {
    val value1 = getValueSafely {
        1/ 0
  }

    val value2 = getValueSafely {
        1 + 1
  }

  value1.printLog()
  value2.printLog()
}

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03-21 16:55:05.649  5072  5072 I KotlinTips: null
03-21 16:55:05.649  5072  5072 I KotlinTips: 2

关于 KotlinTips

KotlinTips是一个关于Kotlin编码技巧的一个系列，希望通过轻量简单的形式介绍能对大家有帮助。

Posted by androidyue Mar 22nd, 2020Kotlin, KotlinTips, null, 异常

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