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SoftwareApp 55dc2293b2 Add a two-pane layout for large screens, and re-shoot the tablet sets

A window at or above Material expanded breakpoint (840dp) now splits into a master pane and a detail pane: tapping a row highlights it and the second pane shows a folder children, or a preview plus the metadata for a file. Opening moves to a double tap on wide windows only; phones (~411dp) and the 7-inch in portrait (~600dp) keep their layout and their tap behaviour.

Found while taking the tablet screenshots: the app had no large-screen layout at all, so on a 2560x1600 canvas every row was 2560px wide with its content stranded in the left ~240px.

The tablet sets are re-shot on this build. That also caught a blank capture (7-inch 01-roots) that had already been committed: a headless AVD draws its system bars before Compose composes its first frame, so the file was not obviously empty. make-store-screenshots.sh now measures each capture app area and refuses to normalise one that is blank.

2026-10-15 00:18:38 +02:00

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Google Play release checklist

Work top to bottom. Items marked [code] are already handled in this repository; the rest are things you must do in the Play Console or with your own accounts.

1. Identity and signing

Application id chosen: de.softwareapp_hb.filemanager (applicationId in app/build.gradle.kts). It can never be changed after the first release, so treat it as locked. namespace and the Kotlin package of the same name are aligned with it; debug builds append .debug.
[code] Upload keystore generated — filemanager-upload.jks in the project root (git-ignored, alias upload, 4096-bit RSA, 10 000 days, CN=Hadrian Burkhardt, L=Potsdam, C=DE). Certificate SHA-256 fingerprint, to confirm the right key is registered when Play App Signing is enabled: 49:A9:FC:13:F5:13:24:48:AE:74:5A:AE:7E:05:D9:2F:67:55:1F:EE:71:A5:64:A1:10:13:57:4D:0E:AA:0E:4E
[code] keystore.properties written (git-ignored, mode 600). The Gradle build picks it up automatically and signs release builds; without it the release APK stays unsigned.
Store the keystore and its password in a password manager and back it up. Losing the upload key means you cannot ship updates.
Enable Play App Signing in the Play Console with the first upload. Google then holds the app signing key and this one only signs uploads: bash keytool -exportcert -alias upload -keystore filemanager-upload.jks -rfc > upload_cert.pem

2. Versioning

versionName [code] — 1.0.0 in app/build.gradle.kts.
versionCode [code] — 1. Play orders uploads by it, so every later upload must be higher.

3. Build the release artefacts

./gradlew :app:bundleRelease      # -> app/build/outputs/bundle/release/app-release.aab
./gradlew :app:assembleRelease    # -> APK, for local checks
./gradlew :app:testDebugUnitTest  # JVM unit tests
./gradlew :app:lintDebug          # Android Lint

[code] verified 2026-10-14. bundleRelease and assembleRelease both succeed with R8 minification and resource shrinking on. - app-release.aab is 4 682 814 bytes (sha256 9014627a8596397623404cb9d986af5019c5e33cf331c5d363427c140f121788). - app-release.apk is 2 081 955 bytes, signed by the upload key above. - Both report versionCode=1 versionName=1.0.0 targetSdk=36 and exactly the permission set in step 4 — no INTERNET, so "nothing leaves the device" holds in the shipped artefact and not just in the source manifest.
Upload the .aab (not the APK) to the Play Console. ⚠️ Expect a native-debug-symbols warning and ignore it. Play finds base/lib/<abi>/libandroidx.graphics.path.so, which arrives transitively through androidx.compose.ui:ui-graphics → androidx.graphics:graphics-path. It is a recommendation, not an error: it does not block upload, review or rollout. This project has no ndk/externalNativeBuild/jniLibs configuration and no native sources of its own.
Keep app/build/outputs/mapping/release/mapping.txt for every release so Play can de-obfuscate crash reports.

4. Sensitive permissions — the Permissions Declaration Form

This is the step that can block a file manager, and the one to get right.

In the Play Console open App content → Sensitive app permissions (older UI: Permissions Declaration Form) and declare All files access (MANAGE_EXTERNAL_STORAGE).
Select the file manager use case. Google's policy — Use of All files access (MANAGE_EXTERNAL_STORAGE) permission — names file managers explicitly: "intended and permitted use includes file managers, backup and restore apps, anti-virus apps, and document management apps."
Make sure the store description states the core purpose (browsing, organising and managing files on the device). The policy requires the core functionality to be "prominently documented and promoted in the app's description" — the listing copy in docs/STORE_LISTING.md (M10) is written to satisfy that.
Do not add QUERY_ALL_PACKAGES, REQUEST_INSTALL_PACKAGES or INTERNET without declaring them. The app currently requests none of them.
Provide the privacy policy URL (PRIVACY.md — it must be a public URL, not a file in the repo).
Keep the permission set honest: declaring a permission the app does not use is itself a policy violation.

Verify the shipped permission set after every release build:

$ANDROID_HOME/build-tools/36.0.0/aapt2 dump permissions \
  app/build/outputs/apk/release/app-release.apk

Expected, and nothing else:

MANAGE_EXTERNAL_STORAGE
READ_EXTERNAL_STORAGE                  (maxSdkVersion=32)
READ_MEDIA_IMAGES
READ_MEDIA_VIDEO
READ_MEDIA_AUDIO
READ_MEDIA_VISUAL_USER_SELECTED
WRITE_EXTERNAL_STORAGE                 (maxSdkVersion=29)
FOREGROUND_SERVICE
FOREGROUND_SERVICE_DATA_SYNC
POST_NOTIFICATIONS
<applicationId>.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION   (added by AndroidX)

5. Data safety, content rating, audience

Data safety form: the app collects nothing and shares nothing. Answer "No" to collection, "No" to sharing, and state that data is not transmitted off the device.
Confirm the answers match PRIVACY.md.
Content rating questionnaire: utility, no user-generated content, no ads.
Target audience: not directed at children.

6. Store listing

Full copy and the generated graphics land in M10 (docs/STORE_LISTING.md). Console fields needed: app name, short description, full description, app icon 512×512, feature graphic 1024×500, and the screenshots.

Upload the screenshots from store-assets/screenshots/: phone 1080×2160 (5), 7-inch tablet 1200×1920 (4), 10-inch tablet 2560×1600 (4). Play wants 4+ per large-screen form factor. All three sets clear its rules — 24-bit PNG with no alpha, shorter side ≥ 320, longer side ≤ 3840, and longer side ≤ 2× the shorter side. tools/make-store-screenshots.sh enforces the aspect ratio and rejects a capture whose app area is blank.
Expect the 7-inch set to be single-pane and the 10-inch set two-pane. That is the adaptive layout working, not an inconsistency — see the CHANGELOG.

7. Release tracks and pricing

Create the app, complete App content, then roll out internal → closed → production, checking the pre-launch report on the way.
⚠️ Set the price before the first upload. Play's own wording: "You can change your app from paid to free. Once your app has been offered for free, the app can't be changed to paid." So: 1. Create a payments profile (identity, tax, bank details). 2. Products › App pricing: base price €4.49. 3. Launch price €2.29 for the first 14 days, then diarise changing it back. 4. Do every step above before uploading.
[code] no Billing client and no BILLING permission — the price lives on the listing, not in the build, so the APK contains no purchase code at all. Verified 2026-10-14 against the release APK. Full rationale and the rejected alternatives: MONETISATION.

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