Android Studio - Errore JVM target

In questo articolo vedremo come risolvere un errore che viene visualizzato durante la compilazione e si tratta di:

Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6. Please specify proper '-jvm-target' option

Per risolvere questo problema occorre aprire il file build.gradle (Module: app)

Una volta aperto occorre aggiungere queste righe di codice

	compileOptions {
	sourceCompatibility JavaVersion.VERSION_1_8
	targetCompatibility JavaVersion.VERSION_1_8
	}
	kotlinOptions {
	jvmTarget = "1.8"
	}

view raw build1.gradle hosted with ❤ by GitHub

Una volta inserite le righe di codice occorre sincronizzare il progetto premendo la scritta Sync now in alto a destra

Ecco un esempio di come si presenta il file build.gradle

	apply plugin: 'com.android.application'
	apply plugin: 'kotlin-android'
	apply plugin: 'kotlin-android-extensions'
	android {
	compileSdkVersion 29
	defaultConfig {
	applicationId "com.dm.tutorialnavigationdraweractivity35"
	minSdkVersion 16
	targetSdkVersion 29
	versionCode 1
	versionName "1.0"
	testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
	}
	buildTypes {
	release {
	minifyEnabled false
	proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
	}
	}
	compileOptions {
	sourceCompatibility JavaVersion.VERSION_1_8
	targetCompatibility JavaVersion.VERSION_1_8
	}
	kotlinOptions {
	jvmTarget = "1.8"
	}
	}
	dependencies {
	implementation fileTree(dir: 'libs', include: ['*.jar'])
	implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
	implementation 'androidx.appcompat:appcompat:1.1.0'
	implementation 'androidx.core:core-ktx:1.2.0'
	implementation 'com.google.android.material:material:1.1.0'
	implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
	implementation 'androidx.navigation:navigation-fragment:2.2.1'
	implementation 'androidx.navigation:navigation-ui:2.2.1'
	implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
	implementation 'androidx.navigation:navigation-fragment-ktx:2.2.1'
	implementation 'androidx.navigation:navigation-ui-ktx:2.2.1'
	testImplementation 'junit:junit:4.12'
	androidTestImplementation 'androidx.test.ext:junit:1.1.1'
	androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
	}

view raw build.gradle hosted with ❤ by GitHub

Come si può vedere le righe di codice sono state inserite a partire dalla riga 24