Why default and static interface methods are not supported by Android Studio 3.0

Question

Why [Default and static interface methods] of java 8 are not supported in Android Studio 3.0?

The code always got the error hint.

The build.gradle settings :

compileSdkVersion 26
buildToolsVersion "26.0.2"
defaultConfig {
    applicationId "com.dreamzone.mtime"
    minSdkVersion 18
    targetSdkVersion 26
    versionCode 1
    versionName "1.0"

}

But android studio doc shows it can compatible any api level. https://developer.android.com/studio/write/java8-support.html

On that page you screenshot, did you see how to enable Java 8 support? — OneCricketeer
– OneCricketeer, Commented Nov 25, 2017 at 17:22
Thanks. It finally works after I update the Android plugin to 3.0.1.I missed that hint. — Monica_BinWhen y
– Monica_BinWhen y, Commented Nov 26, 2017 at 8:26

CommonsWare · Accepted Answer · 2017-11-25 16:37:38Z

7

You need to set Java 8 compatibility in your module's build.gradle file, via the compileOptions closure inside the android closure:

apply plugin: 'com.android.application'

android {

    // other good stuff here

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

answered Nov 25, 2017 at 16:37

CommonsWare

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1 Comment

Monica_BinWhen y Over a year ago

I tried the compile options and grade sync msg error changed to

Error:Jack is required to support java 8 language features. Either enable Jack or remove sourceCompatibility JavaVersion.VERSION_1_8.

I found that I forgot to update Android Gradle plugin to 3.0.0 and higher, now it's ok,thanks.

MehranB · Accepted Answer · 2021-01-10 11:25:35Z

0

// only chnage minSdkversion to more then 26

  defaultConfig {
        applicationId "com.example.myapplication"
        minSdkVersion 26
        targetSdkVersion 30
        versionCode 1
        versionName "1.0
  }

edited Jan 10, 2021 at 11:25

MehranB

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answered Jan 9, 2021 at 19:49

nitin_yadav

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