如何修复 Android 中的 "Call requires API level 26 (current min is 25) " 错误

Question

我知道这个问题可能会被重复，但我没有找到我的问题的任何答案，我在我的 Android 应用程序中使用 LocalDateTime，它需要 API 26 和我设备的 API 是 25。

我能做什么？非常感谢您的帮助。

Answer 1

您可以使用 ThreeTenBP. But for android it is recommended to use Jake Wharton's ThreeTenABP.

为什么不用 ThreeTenBP？

Similar to the problems with using Joda-Time on Android, the threetenbp uses a JAR resource for loading timezone information. This is an extremely inefficient mechanism on Android.

This library places the timezone information as a standard Android asset and provides a custom loader for parsing it efficiently.

为什么不用Joda-Time？

Joda-Time has a very large API which brings with it a very large binary size and large method count. The creator of both JSR-310 and Joda-Time has also said that while Joda-Time isn't broken, it does have design flaws.

If you are using Joda-Time already, there's little reason to switch unless its size or method count is relevant to you. For new projects, however, this library offers the standard APIs in Java 8 as a much smaller package in not only binary size and method count, but also in API size.

这些解释来自 Jake Wharton 的 ThreeTenABP。

Answer 2

您需要使用 https://github.com/JakeWharton/ThreeTenABP 才能在 Android API < 26 时使用 LocalDateTime。

将依赖项添加到您的项目（请遵循项目自述文件）：

implementation 'com.jakewharton.threetenabp:threetenabp:1.2.1'

然后更改您的 LocalDateTime 导入来源：

import java.time.LocalDateTime;

至：

import org.threeten.bp.LocalDateTime;

更新：

上面提到的库不再是 JakeWharton/ThreeTenABP README 中提到的最佳方式：

Attention: Development on this library is winding down. Please consider switching to Android Gradle plugin 4.0, java.time.*, and its core library desugaring feature in the coming months.

要在较旧的 API 关卡中使用 LocalDateTime，请使用 Gradle 插件 4.0 中的脱糖功能： https://developer.android.com/studio/write/java8-support#library-desugaring

Answer 3

在较低版本的 Android 上使用 LocalDateTime 的最佳方法是脱糖（您必须具有 Android Gradle 插件版本 4.0 或更高版本）。只需将以下行添加到您的 app 模块 gradle 文件中：

最后，加上ff。依赖于你的依赖块：

coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.0.10'

Answer 4

要在较低版本的 Android 上使用 LocalDateTime 是通过脱糖（您必须有 Android Gradle 插件版本 4.0 或更高版本）启用 java8并在 app.gradle

中使用下面的代码

android {
    defaultConfig {
        // Required when setting minSdkVersion to 20 or lower
        multiDexEnabled = true
    }

    compileOptions {
        // Flag to enable support for the new language APIs
        coreLibraryDesugaringEnabled = true // <- this flag is required

        // Sets Java compatibility to Java 8
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }

    // For Kotlin projects
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

dependencies {
    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:1.1.5") // <- this dependency is required
}

Supporting docs

Answer 5

如果您有如上所述的 coreLibraryDesugaringEnabled = true 但问题仍未解决，请检查您是否有最新的 coreLibraryDesugaring 版本，因为我的情况是 1.1.1 升级到 1.1.5 解决了这个问题。

如何修复 Android 中的 "Call requires API level 26 (current min is 25) " 错误

How to fix "Call requires API level 26 (current min is 25) " error in Android

java

android

localtime

localdate

更新：