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App 2.18.0: install from a USB stick

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Settings -> App -> "Install from USB stick" (car build only). It looks
in the top folder of every mounted volume (found from the app's own
folder on it, since the head unit has no file picker) for
NilsMG4-unstable-<version>.apk, takes the newest one newer than the
installed version, checks it against its .sha256 sidecar and the
package name, and installs it with the same PackageInstaller session
as the over-the-air update. The stable build gets a stub and no button.

Tested on the emulator: 2.18.0 installed a 2.18.1 from the storage's
top folder without a confirmation, as the system user, so the OTA
install step should not need one either.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki
This commit is contained in:
nils
2026-10-18 20:59:45 +02:00
co-authored by Claude Opus 5.5
parent 0fd024cc2e
commit 69d284f81b
11 changed files with 209 additions and 4 deletions
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app/src/testUnstable/java/com/evsuite/abrp/UsbUpdateTest.java
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package com.evsuite.abrp;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import java.io.File;
import org.junit.Test;
/** Finding a car build on a USB stick — pure JVM. */
public class UsbUpdateTest {
@Test
public void theStickRootIsFourLevelsAboveTheAppFolder() {
assertEquals(new File("/storage/1234-ABCD"), UsbUpdate.volumeRoot(
new File("/storage/1234-ABCD/Android/data/com.stinnesbeck.nilsmg4.unstable/files")));
assertEquals(new File("/storage/emulated/0"), UsbUpdate.volumeRoot(
new File("/storage/emulated/0/Android/data/com.stinnesbeck.nilsmg4.unstable/files")));
assertNull(UsbUpdate.volumeRoot(new File("/data/user/0/com.stinnesbeck.nilsmg4.unstable/files")));
assertNull(UsbUpdate.volumeRoot(null));
}
@Test
public void theNewestNewerCarBuildIsPicked() {
String[] names = {"NilsMG4-unstable-2.17.4.apk", "NilsMG4-unstable-2.18.0.apk", "NilsMG4-unstable-2.18.0.apk.sha256",
"NilsMG4-unstable-2.17.10.apk", "NilsMG4-stable-9.0.0.apk", "FatihsMG4-unstable-9.9.9.apk", "notes.txt"};
assertEquals("NilsMG4-unstable-2.18.0.apk", UsbUpdate.pickNewest(names, "2.17.5-unstable"));
assertEquals("NilsMG4-unstable-2.17.10.apk", UsbUpdate.pickNewest(
new String[]{"NilsMG4-unstable-2.17.4.apk", "NilsMG4-unstable-2.17.10.apk"}, "2.17.5-unstable"));
}
@Test
public void nothingNewerMeansNothing() {
assertNull(UsbUpdate.pickNewest(new String[]{"NilsMG4-unstable-2.17.5.apk"}, "2.17.5-unstable"));
assertNull(UsbUpdate.pickNewest(new String[0], "2.17.5-unstable"));
assertNull(UsbUpdate.pickNewest(null, "2.17.5-unstable"));
}
}