[android] Enable Java 21

Signed-off-by: Jean-Baptiste <jeanbaptiste.charron@outlook.fr>

.github/workflows/android-check.yaml

@@ -6,7 +6,7 @@ on:
       - main
 
 env:
-  JAVA_HOME: /usr/lib/jvm/temurin-17-jdk-amd64  # Java 17 is required for Android Gradle 8 plugin
+  JAVA_HOME: /usr/lib/jvm/temurin-21-jdk-amd64  # Java 21 is required for Android Gradle 8 plugin
   SKIP_MAP_DOWNLOAD: true
 
 jobs:

android/app/build.gradle

@@ -29,12 +29,12 @@ def getCommitMessage() {
 project.ext.appId = 'app.comaps'
 project.ext.appName = 'CoMaps'
 
-// I have Java 21 installed, but this doesn't work on MacOS.
-//java {
-//  toolchain {
-//    languageVersion.set(JavaLanguageVersion.of(17))
-//  }
-//}
+
+java {
+  toolchain {
+    languageVersion.set(JavaLanguageVersion.of(21))
+  }
+}
 
 android {
   namespace = 'app.organicmaps'
@@ -311,8 +311,8 @@ android {
   compileOptions {
     coreLibraryDesugaringEnabled = true
 
-    sourceCompatibility JavaVersion.VERSION_17
-    targetCompatibility JavaVersion.VERSION_17
+    sourceCompatibility JavaVersion.VERSION_21
+    targetCompatibility JavaVersion.VERSION_21
   }
 }
 

docs/INSTALL.md

@@ -245,7 +245,7 @@ Check if you have a system-wide Java Runtime Environment (JRE) installed:
 java -version
 ```
 
-If your system doesn't have a JRE installed or Java version is less than 17 (OpenJDK)
+If your system doesn't have a JRE installed or Java version is less than 21 (OpenJDK)
 or you want command line builds to use a JRE version bundled with the Studio
 then set the `JAVA_HOME` environment variable: