Merge pull request #1 from oldkingOK/fixci

ci: branch checkout and apk sign issues

.github/workflows/build.yml

@@ -24,6 +24,13 @@ jobs:
           distribution: 'adopt'
           java-version: '17'
           architecture: x64
+
+      - name: Setup build tool version variable
+        shell: bash
+        run: |
+          BUILD_TOOL_VERSION=$(ls /usr/local/lib/android/sdk/build-tools/ | tail -n 1)
+          echo "BUILD_TOOL_VERSION=$BUILD_TOOL_VERSION" >> $GITHUB_ENV
+          echo Last build tool version is: $BUILD_TOOL_VERSION
 
       - name: Set up Go
         run: |
@@ -35,7 +42,6 @@ jobs:
         run: |
           git clone https://github.com/Mythologyli/zju-connect.git
           cd zju-connect
-          git checkout android
           go mod download
           go install golang.org/x/mobile/cmd/gomobile@latest
           go get golang.org/x/mobile/bind@latest
@@ -80,6 +86,8 @@ jobs:
           alias: ${{ secrets.ALIAS }}
           keyStorePassword: ${{ secrets.KEY_STORE_PASSWORD }}
           keyPassword: ${{ secrets.KEY_PASSWORD }}
+        env:
+          BUILD_TOOLS_VERSION: ${{ env.BUILD_TOOL_VERSION }}
 
       - name: Rename APK
         run: