Add support for AGP 8.4 (#120)

* android: bump minSdkVersion to 21

Fixes the following error with AGP 8.4:

    A problem occurred configuring project ':webcrypto'.
    > [CXX1110] Platform version 16 is unsupported by this NDK. Please change minSdk to at least 21 to avoid undefined behavior. To suppress this error, add android.ndk.suppressMinSdkVersionError=21 to the project's gradle.properties or set android.experimentalProperties["android.ndk.suppressMinSdkVersionError"]=21 in the Gradle build file.

* android: drop package attribute from AndroidManifest.xml

Fixes the following error with AGP 8.4:

    Execution failed for task ':webcrypto:processReleaseManifest'.
    > A failure occurred while executing com.android.build.gradle.tasks.ProcessLibraryManifest$ProcessLibWorkAction
       > Incorrect package="com.example.webcrypto" found in source AndroidManifest.xml: /home/simon/src/webcrypto.dart/android/src/main/AndroidManifest.xml.
         Setting the namespace via the package attribute in the source AndroidManifest.xml is no longer supported.
         Recommendation: remove package="com.example.webcrypto" from the source AndroidManifest.xml: /home/simon/src/webcrypto.dart/android/src/main/AndroidManifest.xml.

* example: build.gradle automatic upgrade

These changes are made automatically by the flutter tool when
running "flutter build apk".

* example: upgrade to AGP 8.4

This is done via the Android Studio AGP upgrade assistant.

* ci: upgrade Java to version 21

Java 11 is not new enough for AGP 8.4.

.github/workflows/test.yml

@@ -121,6 +121,10 @@ jobs:
         with:
           channel: 'stable'
           cache: true
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'zulu'
+          java-version: 21
       - name: Configure Flutter
         run: |
           flutter config --no-analytics

android/build.gradle

@@ -25,10 +25,7 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
 android {
-    // Conditional for compatibility with AGP <4.2.
-    if (project.android.hasProperty("namespace")) {
-        namespace 'dev.google.webcrypto'
-    }
+    namespace 'dev.google.webcrypto'
 
     compileSdkVersion 31
 
@@ -53,7 +50,7 @@ android {
     }
 
     defaultConfig {
-        minSdkVersion 16
+        minSdkVersion 21
         ndk {
             abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
         }

android/src/main/AndroidManifest.xml

@@ -14,6 +14,5 @@
  limitations under the License.
 -->
 
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-  package="com.example.webcrypto">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 </manifest>

example/android/app/build.gradle

@@ -45,7 +45,7 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.example.webcrypto_example"
-        minSdkVersion 16
+        minSdkVersion flutter.minSdkVersion
         targetSdkVersion 31
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
@@ -58,6 +58,7 @@ android {
             signingConfig signingConfigs.debug
         }
     }
+    namespace 'com.example.webcrypto_example'
 }
 
 flutter {

example/android/app/src/debug/AndroidManifest.xml

@@ -14,8 +14,7 @@
  limitations under the License.
 -->
 
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.webcrypto_example">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <!-- The INTERNET permission is required for development. Specifically,
          the Flutter tool needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.

example/android/app/src/main/AndroidManifest.xml

@@ -14,8 +14,7 @@
  limitations under the License.
 -->
 
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.webcrypto_example">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <application
         android:label="webcrypto_example"
         android:name="${applicationName}"

example/android/app/src/profile/AndroidManifest.xml

@@ -14,8 +14,7 @@
  limitations under the License.
 -->
 
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.webcrypto_example">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <!-- The INTERNET permission is required for development. Specifically,
          the Flutter tool needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.

example/android/build.gradle

@@ -1,12 +1,12 @@
 buildscript {
-    ext.kotlin_version = '1.6.10'
+    ext.kotlin_version = '1.6.21'
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.1.2'
+        classpath 'com.android.tools.build:gradle:8.4.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -26,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }

example/android/gradle.properties

@@ -1,3 +1,6 @@
 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
+android.defaults.buildfeatures.buildconfig=true
+android.nonTransitiveRClass=false
+android.nonFinalResIds=false

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-all.zip