# Android Build

Build the APK with:

```sh
make apk
```

`make apk` uses a local Java 25 install when `JAVA_HOME` points to one.
If the host does not have a working Java 25 install, it falls back to the
repo-managed Docker image in `packaging/docker/android-apk/`, which also builds
with Java 25.

Environment:

- `ANDROID_SDK_ROOT` defaults to `/opt/android-sdk`.
- `ANDROID_NDK_ROOT` defaults to `/opt/android-ndk`.
- `JAVA_HOME` defaults to `/usr/lib/jvm/java-25-openjdk`.
- `APK_BUILD_IMAGE` overrides the Docker image name used by `make apk-container`.
- `APP_ID` overrides the Android application id.
- `APP_VERSION` overrides the version shown inside KeePassGO itself.
- `APK_OUT` overrides the output path.
- `APK_VERSION` overrides the packaged app version.
- `ANDROID_MIN_SDK` overrides the minimum supported Android SDK.
- `ANDROID_TARGET_SDK` overrides the target Android SDK.

Installed machine prerequisites expected by this repo:

- `android-sdk-cmdline-tools-latest`
- `android-sdk-build-tools`
- `android-platform-35`
- `android-sdk-platform-tools`
- a working Java 25 JDK install for `make apk-local`, or Docker for `make apk`

The repo tracks `gogio` as a Go tool, and the local build runs through:

```sh
go tool gogio -target android ./cmd/keepassgo ...
```

The Android build uses the branded icon asset at:

- `internal/assets/keepassgo-icon.png`

Note:

- KeePassGO's documented Android build uses Java 25 locally.
- If that host setup is unavailable, `make apk` falls back to the Docker image
  so the build still runs under Java 25 instead of encoding a newer host JDK as
  a requirement.
- Android runtime testing on the `KeepassGoAPI35` emulator showed a black-screen
  regression with `gioui.org v0.9.0` while a stock Gio example and KeePassGO both
  rendered correctly with `gioui.org v0.8.0` on the same emulator and SDK/JDK
  pipeline. KeePassGO is pinned to the working Gio line until that regression is
  understood upstream.