feat: preview auto sign

Author: dsfkjlweuyr

.github/workflows/preview.yml

@@ -60,9 +60,34 @@ jobs:
           export LOCAL_PROPERTIES="${{ secrets.LOCAL_PROPERTIES }}"
           ./run init action gradle
           ./gradlew app:assemblePreviewRelease
+          
+          # Sign unsigned APKs with default debug keystore
+          if [ ! -f ~/.android/debug.keystore ]; then
+            echo "Generating debug.keystore..."
+            mkdir -p ~/.android
+            keytool -genkey -v -keystore ~/.android/debug.keystore -storepass android -alias androiddebugkey -keypass android -keyalg RSA -keysize 2048 -validity 10000 -dname "CN=Android Debug,O=Android,C=US"
+          fi
+          
+          APKSIGNER=$(find ${ANDROID_HOME}/build-tools -name apksigner | sort -V | tail -n 1)
+          if [ -z "$APKSIGNER" ]; then
+            APKSIGNER="apksigner"
+          fi
+          echo "Using apksigner: $APKSIGNER"
+          
           APK=$(find app/build/outputs/apk -name '*arm64-v8a*.apk')
-          APK=$(dirname $APK)
-          echo "APK=$APK" >> $GITHUB_ENV
+          APK_DIR=$(dirname $APK)
+          
+          echo "Signing APKs in $APK_DIR..."
+          for apk in "$APK_DIR"/*-unsigned.apk; do
+            if [ -f "$apk" ]; then
+              signed_apk="${apk%-unsigned.apk}-debug-signed.apk"
+              echo "Signing $apk -> $signed_apk"
+              $APKSIGNER sign --ks ~/.android/debug.keystore --ks-pass pass:android --key-pass pass:android --out "$signed_apk" "$apk"
+              rm "$apk"
+            fi
+          done
+          
+          echo "APK=$APK_DIR" >> $GITHUB_ENV
       - uses: actions/upload-artifact@v5
         with:
           name: APKs

nb4a.properties

@@ -1,4 +1,4 @@
 PACKAGE_NAME=com.nb4a
 VERSION_NAME=1.4.2-mod-19
-PRE_VERSION_NAME=pre-1.4.2-20260214-1
+PRE_VERSION_NAME=pre-1.4.2-20260714-1
 VERSION_CODE=46