android studio:-source 1.7不支持lambda表达式(使用-source 8或更高版本以启用lambda表达式) [英] android studio : lambda expressions are not supported in -source 1.7 (use -source 8 or higher to enable lambda expressions)

问题描述

很高兴知道Java在Java中引入了 Lambda表达式版本8.

Happy to know that java introduced Lambda expressions in java version 8.

我在android studio中工作.而且我注意到DialogInterface.OnClickListener()出现下划线并变成灰色，如下所示:

I was working in android studio. And I noticed that DialogInterface.OnClickListener() was showing underline and became grey colored as below:

因此，我在该行上做了alter + enter，并找到了将代码替换为Lambda表达式的选项，如下所示:

So, I did alter + enter on that line and found option to replace the code with Lambda Expressions, as below:

这导致以下结果:

运行代码后，它向我显示此错误:

After running the code it showed me this error:

错误:(160，69)错误:-source不支持lambda表达式 1.7(使用-source 8或更高版本启用lambda表达式)

Error:(160, 69) error: lambda expressions are not supported in -source 1.7 (use -source 8 or higher to enable lambda expressions)

但是我已经在使用Java jdk1.8.0_31.还有什么我需要安装的吗?

But I am already using java jdk1.8.0_31. Is there anything else, I need to install ?

任何人都可以帮我吗..

Can anyone help me out please..

推荐答案

您无法为Android编译Java 8源，因为Android SDK尚不支持Java 8.

You cannot compile Java 8 sources for Android, because Android SDK does not support Java 8 yet.

但是有一种在代码中使用Lambda的方法- RetroLambda .这是一个小技巧，可让您在项目中使用Java 8的某些功能.

But there is one way to use Lambdas in your code - RetroLambda. This is a little hack that allows you to use some of the features of Java 8 in your project.

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