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2024-02-10 08:00:06

默认的接口方法只支持Android 7.0 (Nougat)

我升级到Android Studio 3.1，我得到以下错误:

默认的接口方法只支持从Android N(——min-api 24)开始:void Android .arch.lifecycle. defaultlifecycleobserver . oncreate (Android .arch. lifecycleowner) 消息{kind=ERROR, text=默认接口方法只支持从Android N开始(——min-api 24): void Android .arch. lifeccycle . defaultlifecycle观察者. oncreate (Android .arch. lifeccycle . lifecycleowner)， sources=[未知源文件]，工具名=Optional.of(D8)}

这是我的Gradle配置:

compileSdkVersion 27
//buildToolsVersion '27.0.3'
defaultConfig {
    minSdkVersion 16
    targetSdkVersion 27
     multiDexEnabled true
     //...
   }

如你所见，我的目标是27，它已经超过了它所抱怨的24。我该怎么补救呢?如果我换成1.8 Java，我是不是会失去很多客户?为什么我在升级Android Studio之前没有得到这个错误?

我不知道这是否与我最近放入的LifecycleObserver类有关。它是在Kotlin，现在我把它改成了Java，但我在清理项目后仍然得到相同的错误:

public class LifeCycleAwareObserver implements LifecycleObserver {

    @OnLifecycleEvent(Lifecycle.Event.ON_STOP)
    public void  onAppBackgrounded() {
        AnalyticsUtils.trackStartSession(true);
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_START)
    public void onAppForegrounded() {
        AnalyticsUtils.trackStartSession(false);
    }
}

我如何跟踪错误来自哪里，以便修复它?

以下是我的版本依赖项:

project.ext {

        firebase_version = '12.0.0'

        supportlib_version = '27.0.2'

        room_version = '1.0.0'

        espresso_version = '3.0.1'

        archLifecycleVersion = '1.1.1'
    }

当前回答

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.0"

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        applicationId "com.example.architecture"
        minSdkVersion 16
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation 'androidx.room:room-runtime:2.2.5'
    implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
    annotationProcessor 'androidx.room:room-compiler:2.2.5'
    def lifecycle_version = "2.2.0"
    def arch_version = "2.1.0"

    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    implementation 'androidx.core:core-ktx:1.3.0'
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-service:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-process:$lifecycle_version"
    implementation "androidx.cardview:cardview:1.0.0"
}

在应用模块的build.gradle中添加配置

android {
    ...
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}
2020-07-15 16:29:02

其他回答

您可以通过在最新的Android Studio 3.4.1版本中将Source Compatibility和*Target Compatibility Java版本降级到1.8来解决此问题。

在Mac上右键单击app文件夹或Command + Down箭头打开模块设置(项目结构)窗口 选择模块→属性 将源兼容性和目标兼容性版本更改为1.8 单击Apply或OK。就是这样。它会解决你的问题。

也可以手动添加文件构建。gradle(模块:app):

android {
...

compileOptions {
        sourceCompatibility = '1.8'
        targetCompatibility = '1.8'
    }

...
}
2019-06-18 05:10:50

我的项目使用ButterKnife和Retro lambda。设置JavaVersion。VERSION_1_8将不能工作。它总是责怪ButterKnife静态接口函数，直到我发现这个Migrate from Retrolambda。

博士TL;

只需添加javaverse。VERSION_1_8并从项目中完全删除retrolambda。它将成功构建。

2019-12-24 16:04:10 
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.0"

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        applicationId "com.example.architecture"
        minSdkVersion 16
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation 'androidx.room:room-runtime:2.2.5'
    implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
    annotationProcessor 'androidx.room:room-compiler:2.2.5'
    def lifecycle_version = "2.2.0"
    def arch_version = "2.1.0"

    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    implementation 'androidx.core:core-ktx:1.3.0'
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-service:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-process:$lifecycle_version"
    implementation "androidx.cardview:cardview:1.0.0"
}

在应用模块的build.gradle中添加配置

android {
    ...
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}
2020-07-15 16:29:02

在构建中使用此代码。gradle文件:

android {
    compileOptions {
        incremental true
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}
2019-05-27 17:13:09

在应用级Gradle文件中，你必须编写以下代码:

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

它们来自Android中的JavaVersion.java。

Java版本的枚举。 9点前:http://www.oracle.com/technetwork/java/javase/versioning-naming-139433.html 9点后:http://openjdk.java.net/jeps/223

2019-07-06 05:59:57

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