build(android): 更新Kotlin版本至2.0.21

升级Kotlin版本以获取最新功能和安全修复

ci(release): 添加APK签名配置和权限

- 添加GitHub Actions的contents和actions权限
- 在发布流程中增加APK签名步骤
- 构建后自动清理签名文件

Author: shadowfish07

.github/workflows/release.yml

@@ -1,5 +1,9 @@
 name: Build and Release
 
+permissions:
+  contents: write
+  actions: read
+
 on:
   push:
     tags:
@@ -55,9 +59,22 @@ jobs:
           git commit -m "chore: update version to ${{ steps.version.outputs.version }}" || exit 0
           git push origin HEAD:main || exit 0
 
-      - name: Build APK
+      - name: Setup signingQueue
+        run: |
+          echo "${{ secrets.KEYSTORE_BASE64 }}" | base64 --decode > android/app/release-key.jks
+          echo "storeFile=release-key.jks" > key.properties
+          echo "storePassword=${{ secrets.KEYSTORE_PASSWORD }}" >> key.properties
+          echo "keyAlias=${{ secrets.KEY_ALIAS }}" >> key.properties
+          echo "keyPassword=${{ secrets.KEY_PASSWORD }}" >> key.properties
+
+      - name: Build signed APK
         run: flutter build apk --release
 
+      - name: Clean up signing files
+        run: |
+          rm -f android/app/release-key.jks
+          rm -f android/key.properties
+
       - name: Build App Bundle
         run: flutter build appbundle --release
 

android/build.gradle

@@ -6,7 +6,7 @@ allprojects {
 }
 
 subprojects {
-    ext.kotlin_version = '1.8.22'
+    ext.kotlin_version = '2.0.21'
 }
 
 rootProject.buildDir = '../build'