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Merge pull request 'Preserve household TV data during app maintenance' (#55) from fm/tv-keep-data into main

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justinzeus 2026-11-07 14:50:13 +01:00
commit b44519f01b
2 changed files with 25 additions and 6 deletions
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1
app/src/main/AndroidManifest.xml
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@ -40,6 +40,7 @@
<application <application
android:allowBackup="true" android:allowBackup="true"
android:hasFragileUserData="true"
android:banner="@mipmap/ic_banner" android:banner="@mipmap/ic_banner"
android:icon="@mipmap/ic_launcher" android:icon="@mipmap/ic_launcher"
android:label="@string/app_name" android:label="@string/app_name"

30
docker/README.md
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@ -991,12 +991,30 @@ Keep and back up this file across clean builds, disposable worktrees, container
rebuilds and Gradle cache resets. Never commit it. The standard debug passwords rebuilds and Gradle cache resets. Never commit it. The standard debug passwords
are public; this key is for local debug/optimized builds, not release signing. are public; this key is for local debug/optimized builds, not release signing.
**One-time reinstall:** the first build with the stable key still needs one ### Preserve household TV data
uninstall+reinstall on the box because the signer changes once; later ones
install in place with `adb install -r`, retaining sign-ins and settings. Install and update the household TV app only in place with `adb install -r`,
The initial uninstall removes app data, so sign in again once after that switch. using the same package and persistent debug signer. Its certificate SHA-256 is:
Deleting/replacing the persistent key or choosing a different override changes
the signer again and requires another reinstall. ```text
182bac72e292b9ea4d3d4e6383f92eb2161fa28ba5afcff0337cb7d5a9d5341d
```
Never run `adb uninstall`, `pm uninstall` or `pm clear`, or switch signers on
the household box: clearing/removing the app deletes saved people, sign-ins
and settings, and a different signer cannot update the existing app in place.
Do not delete or replace the persistent key. If an uninstall is unavoidable,
use `adb uninstall -k <package>` to keep app data, then reinstall the same
package with the same signer.
The manifest sets `android:hasFragileUserData="true"` so Android 10+ can offer
a **keep app data** choice during interactive uninstall. Choose it when
available; older Android versions ignore the attribute. This is a retention
prompt, not an automatic backup or a guarantee against data clearing.
For an in-place update, compare `dumpsys package <pkg>` before and after:
`firstInstallTime` must remain unchanged. The guarded installer that checks
the signer and this timestamp lives in the operator's tooling, not this repo.
## Release credentials ## Release credentials