Set the source/target compatibility to 11

This is because up to Java 11 features are supported without requiring
minimum API level nor AGP versions at the moment as in
https://developer.android.com/studio/write/java11-minimal-support-table

Author: thagikura

build-logic/convention/build.gradle.kts

@@ -23,13 +23,15 @@ plugins {
 group = "com.google.samples.apps.nowinandroid.buildlogic"
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    // Up to Java 11 APIs are available through desugaring
+    // https://developer.android.com/studio/write/java11-minimal-support-table
+    sourceCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_11
 }
 
 tasks.withType<KotlinCompile>().configureEach {
     kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_17.toString()
+        jvmTarget = JavaVersion.VERSION_11.toString()
     }
 }
 

build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/AndroidCompose.kt

@@ -17,12 +17,10 @@
 package com.google.samples.apps.nowinandroid
 
 import com.android.build.api.dsl.CommonExtension
-import org.gradle.api.JavaVersion
 import org.gradle.api.Project
 import org.gradle.api.artifacts.VersionCatalogsExtension
 import org.gradle.kotlin.dsl.dependencies
 import org.gradle.kotlin.dsl.getByType
-import org.gradle.kotlin.dsl.provideDelegate
 import org.gradle.kotlin.dsl.withType
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import java.io.File

build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/KotlinAndroid.kt

@@ -40,8 +40,10 @@ internal fun Project.configureKotlinAndroid(
         }
 
         compileOptions {
-            sourceCompatibility = JavaVersion.VERSION_17
-            targetCompatibility = JavaVersion.VERSION_17
+            // Up to Java 11 APIs are available through desugaring
+            // https://developer.android.com/studio/write/java11-minimal-support-table
+            sourceCompatibility = JavaVersion.VERSION_11
+            targetCompatibility = JavaVersion.VERSION_11
             isCoreLibraryDesugaringEnabled = true
         }
     }
@@ -50,7 +52,7 @@ internal fun Project.configureKotlinAndroid(
     tasks.withType<KotlinCompile>().configureEach {
         kotlinOptions {
             // Set JVM target to 17
-            jvmTarget = JavaVersion.VERSION_17.toString()
+            jvmTarget = JavaVersion.VERSION_11.toString()
             // Treat all Kotlin warnings as errors (disabled by default)
             // Override by setting warningsAsErrors=true in your ~/.gradle/gradle.properties
             val warningsAsErrors: String? by project

lint/build.gradle.kts

@@ -23,13 +23,15 @@ plugins {
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    // Up to Java 11 APIs are available through desugaring
+    // https://developer.android.com/studio/write/java11-minimal-support-table
+    sourceCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_11
 }
 
 tasks.withType<KotlinCompile>().configureEach {
     kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_17.toString()
+        jvmTarget = JavaVersion.VERSION_11.toString()
     }
 }