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vendor/opengapps/sources/all/product/overlay/README.md

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OpenGApps overlays

These overlays are required since SDK28 to support some of the Google features like setting the default Dialer or making PixelLauncher work as it dose on Pixel devices.

Contents

This folder contains both overlay APKs and their sources in the respective folders. You're free to browse them to see what's inside each of the overlay.

Creation process

The process is pretty basic and includes these 5 steps:

  1. Set up the folder structure with the required resources

  2. Set up the AndroidManifest.xml to target proper Android version

  3. Build the overlay's APK file by calling aapt:

    aapt p -M AndroidManifest.xml -S res -I $ANDROID_SDK_ROOT/platforms/android-VERSION/android.jar -F overlay.apk.un

    where:

    • VERSION is the targeted Android version number (e.g. 30)
    • .un suffix stands for unaligned (we will zipalign it later)

  4. Sign the unaligned APK: jarsigner -keystore PATH/TO/YOUR/keystore.jks overlay.apk.un YOUR_KEY_NAME

    You'll be asked for the keystore password and the key password, if required

  5. Zipalign the APK: zipalign 4 overlay.apk.un overlay.apk