App 2.19.1: Foreground apps diagnostic on the Logs tab
Read-only: recent foreground apps (usage events), open tasks, policy_control and the status bar height, for finding the CarPlay package before a full-screen experiment. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Claude Opus 5.5
@@ -118,6 +118,15 @@ tyre pressures, GPS (lat, lon, elevation, heading) and the is_* flags. It does *
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confirmed car facts, app structure, UI conventions, build/test/ship, documents. It replaces
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upstream's EVABRPUploader text. The test emulator is now in the flake: `nix run .#car-emulator`
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(Android 9 AOSP at 1920×720, 160 dpi; the car build installs as the system user — checked).
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- 2026-10-23 — App 2.19.1: "Foreground apps" card on the Logs tab, step 1 of the CarPlay
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full-screen experiment. It reads which apps came to the front in the last 30 minutes (usage
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events, open to the system user without a declared permission), the open tasks, the
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`policy_control` global setting and the status bar height — on opening the tab, on returning to
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it and on Refresh, never in the background. It changes nothing. On the emulator (car build,
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system user) it named Settings, the clock, the calculator and the launcher with times, and the
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page still fits 1778×640 with every line filled. The stable build says it cannot read them. Not
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tried on the car; the CarPlay package name is what this is for. Next: a switch that sets
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`policy_control` to `immersive.full=<that package>`, on approval.
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- 2026-10-19 — `k8s/agent-access/`: a service account `mg4-agent` for a coding agent, limited to
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the `mg4` namespace. Read-only role by default; an optional deploy role. Neither may touch
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Secrets, exec, port-forward or RBAC; the deploy role cannot delete PVCs. `make-kubeconfig.sh`
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+2
-2
@@ -34,8 +34,8 @@ android {
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applicationId "com.stinnesbeck.nilsmg4"
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minSdk 27
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targetSdk 36
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versionCode 99
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versionName "2.19.0"
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versionCode 100
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versionName "2.19.1"
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// Nothing about the server ships in the APK: its URL and ingest token are entered in
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// the app's Server tab (ServerConfig), and the database is only reachable by the server.
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@@ -0,0 +1,64 @@
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package com.evsuite.abrp;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Locale;
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import java.util.TimeZone;
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/**
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* Which app was in front, and when: the lines of the Logs tab's "Foreground apps" card.
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*
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* Built from the platform's foreground events, oldest first. Consecutive events for the same
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* screen collapse into one, the newest comes first, and an activity in its own package is
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* shortened to ".Name" so the line stays readable. Pure Java, so it is unit-tested.
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*/
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final class ForegroundHistory {
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/** One move to the foreground. className may be null when the platform gives none. */
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static final class Event {
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final long timeMs;
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final String packageName;
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final String className;
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Event(long timeMs, String packageName, String className) {
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this.timeMs = timeMs;
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this.packageName = packageName;
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this.className = className;
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}
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}
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private ForegroundHistory() {}
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/** At most {@code limit} lines, newest first. */
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static List<String> lines(List<Event> oldestFirst, int limit, TimeZone zone) {
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List<Event> collapsed = new ArrayList<>();
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for (Event e : oldestFirst) {
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if (e == null || e.packageName == null || e.packageName.isEmpty()) continue;
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Event last = collapsed.isEmpty() ? null : collapsed.get(collapsed.size() - 1);
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if (last != null && last.packageName.equals(e.packageName)
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&& equal(last.className, e.className)) continue;
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collapsed.add(e);
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}
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SimpleDateFormat time = new SimpleDateFormat("HH:mm:ss", Locale.ROOT);
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time.setTimeZone(zone);
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List<String> out = new ArrayList<>();
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for (int i = collapsed.size() - 1; i >= 0 && out.size() < limit; i--) {
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Event e = collapsed.get(i);
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String screen = shortClass(e.packageName, e.className);
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out.add(time.format(e.timeMs) + " " + e.packageName + (screen == null ? "" : " " + screen));
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}
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return out;
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}
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/** ".Name" for an activity inside its own package, the full name otherwise. */
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static String shortClass(String packageName, String className) {
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if (className == null || className.isEmpty()) return null;
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if (className.startsWith(packageName + ".")) return className.substring(packageName.length());
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return className;
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}
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private static boolean equal(String a, String b) {
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return a == null ? b == null : a.equals(b);
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}
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}
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@@ -0,0 +1,110 @@
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package com.evsuite.abrp;
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import android.annotation.SuppressLint;
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import android.app.ActivityManager;
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import android.app.usage.UsageEvents;
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import android.app.usage.UsageStatsManager;
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import android.content.ComponentName;
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import android.content.Context;
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import android.content.res.Resources;
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import android.provider.Settings;
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import android.util.Log;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.TimeZone;
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/**
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* Read-only diagnostic: which apps were in front lately, which tasks are open now, and the
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* system values a full-screen experiment for another app would touch. It changes nothing.
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*
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* The usage events and the full task list are open to the system user, which the car build
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* runs as; the stable build sees only its own tasks and no events, and says so. Called on
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* demand from the Logs tab, never in the background.
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*/
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final class ForegroundProbe {
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private static final String TAG = "EVABRP.Foreground";
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static final long WINDOW_MS = 30 * 60_000L;
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private static final int MAX_LINES = 8;
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private static final int MAX_TASKS = 4;
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static final class Result {
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/** Null when the platform would not give the events (not the system user). */
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List<String> recent;
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List<String> tasks = new ArrayList<>();
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/** The {@code policy_control} global setting; null when unset. */
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String policyControl;
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/** The platform's status bar height in pixels; null when unknown. */
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Integer statusBarPx;
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}
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private ForegroundProbe() {}
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static Result read(Context context) {
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Result r = new Result();
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r.recent = recentForeground(context);
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r.tasks = runningTasks(context);
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try {
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r.policyControl = Settings.Global.getString(context.getContentResolver(), "policy_control");
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} catch (RuntimeException e) {
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Log.w(TAG, "policy_control unreadable", e);
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}
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try {
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Resources sys = Resources.getSystem();
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int id = sys.getIdentifier("status_bar_height", "dimen", "android");
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if (id != 0) r.statusBarPx = sys.getDimensionPixelSize(id);
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} catch (RuntimeException e) {
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Log.w(TAG, "status bar height unreadable", e);
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}
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return r;
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}
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// No PACKAGE_USAGE_STATS in the manifest: the usage service lets the system user through on
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// its own, and any other caller gets an empty stream, reported as "not readable".
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@SuppressLint("MissingPermission")
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private static List<String> recentForeground(Context context) {
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try {
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UsageStatsManager usage = (UsageStatsManager) context.getSystemService(Context.USAGE_STATS_SERVICE);
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if (usage == null) return null;
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long now = System.currentTimeMillis();
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UsageEvents events = usage.queryEvents(now - WINDOW_MS, now);
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if (events == null) return null;
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List<ForegroundHistory.Event> list = new ArrayList<>();
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UsageEvents.Event e = new UsageEvents.Event();
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boolean any = false;
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while (events.hasNextEvent()) {
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events.getNextEvent(e);
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any = true;
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if (e.getEventType() == UsageEvents.Event.MOVE_TO_FOREGROUND) {
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list.add(new ForegroundHistory.Event(e.getTimeStamp(), e.getPackageName(), e.getClassName()));
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}
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}
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// A caller without access gets an empty stream rather than an error; an empty
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// stream for the system user would still contain our own app coming to the front.
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if (!any) return null;
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return ForegroundHistory.lines(list, MAX_LINES, TimeZone.getDefault());
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} catch (RuntimeException e) {
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Log.w(TAG, "usage events unreadable", e);
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return null;
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}
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}
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@SuppressWarnings("deprecation") // getRunningTasks: the system user still gets every task
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private static List<String> runningTasks(Context context) {
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List<String> out = new ArrayList<>();
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try {
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ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
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if (am == null) return out;
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for (ActivityManager.RunningTaskInfo t : am.getRunningTasks(MAX_TASKS)) {
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ComponentName top = t.topActivity;
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if (top == null) continue;
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String screen = ForegroundHistory.shortClass(top.getPackageName(), top.getClassName());
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out.add(top.getPackageName() + (screen == null ? "" : " " + screen));
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}
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} catch (RuntimeException e) {
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Log.w(TAG, "tasks unreadable", e);
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}
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return out;
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}
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}
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@@ -203,6 +203,46 @@ public class MainActivity extends AppCompatActivity {
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}
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((TextView) findViewById(R.id.header_title)).setText(PAGE_TITLES[position]);
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((TextView) findViewById(R.id.header_subtitle)).setText(PAGE_SUBTITLES[position]);
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if (panes != null && panes[position] == logPane) refreshForeground();
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}
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private TextView foregroundText;
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private final java.util.concurrent.ExecutorService diagReader =
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java.util.concurrent.Executors.newSingleThreadExecutor(r -> new Thread(r, "foreground-read"));
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/** Logs tab diagnostic: reads which apps were in front, off the main thread. Changes nothing. */
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private void refreshForeground() {
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if (foregroundText == null) return;
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try {
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diagReader.execute(() -> {
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ForegroundProbe.Result r = ForegroundProbe.read(getApplicationContext());
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runOnUiThread(() -> { if (!isDestroyed()) foregroundText.setText(foregroundReport(r)); });
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});
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} catch (java.util.concurrent.RejectedExecutionException ignored) {
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// Activity going away.
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}
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}
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private String foregroundReport(ForegroundProbe.Result r) {
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StringBuilder sb = new StringBuilder();
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if (r.recent == null) {
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sb.append(getString(R.string.foreground_unavailable)).append('\n');
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} else if (r.recent.isEmpty()) {
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sb.append(getString(R.string.foreground_none)).append('\n');
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} else {
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sb.append(getString(R.string.foreground_recent)).append('\n');
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for (String line : r.recent) sb.append(line).append('\n');
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}
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if (!r.tasks.isEmpty()) {
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sb.append('\n').append(getString(R.string.foreground_tasks)).append('\n');
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for (String t : r.tasks) sb.append(t).append('\n');
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}
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sb.append('\n').append(getString(R.string.foreground_policy,
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r.policyControl == null ? getString(R.string.foreground_policy_unset) : r.policyControl));
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if (r.statusBarPx != null) {
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sb.append('\n').append(getString(R.string.foreground_status_bar, r.statusBarPx));
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}
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return sb.toString();
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}
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/** Refreshes state + call log while the screen is visible. */
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@@ -255,6 +295,8 @@ public class MainActivity extends AppCompatActivity {
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statusText = servicePane.findViewById(R.id.status_text);
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callLogText = logPane.findViewById(R.id.call_log_text);
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logPane.findViewById(R.id.flush_now_button).setOnClickListener(v -> manualFlush());
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foregroundText = logPane.findViewById(R.id.foreground_text);
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logPane.findViewById(R.id.foreground_refresh_button).setOnClickListener(v -> refreshForeground());
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setUpPager();
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// Back on the page that was open when the activity was recreated (accent colour change).
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@@ -343,6 +385,11 @@ public class MainActivity extends AppCompatActivity {
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// Poll state and log only while the screen is up; onPause cancels it.
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uiHandler.post(uiRefresh);
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uiHandler.post(overviewRefresh);
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// Back from another app (CarPlay) on the Logs tab: show where we were.
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if (panes != null) {
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ViewPager2 pager = findViewById(R.id.content);
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if (panes[pager.getCurrentItem()] == logPane) refreshForeground();
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}
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}
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@Override
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@@ -395,6 +442,7 @@ public class MainActivity extends AppCompatActivity {
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@Override
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protected void onDestroy() {
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carReader.shutdownNow();
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diagReader.shutdownNow();
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super.onDestroy();
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}
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@@ -0,0 +1,19 @@
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<?xml version="1.0" encoding="utf-8"?>
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<com.evsuite.abrp.StableScrollView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:fillViewport="true" android:clipToPadding="false">
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<!-- Two columns: upload log | foreground apps (diagnostic). -->
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<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:paddingStart="24dp" android:paddingEnd="24dp" android:paddingTop="12dp" android:paddingBottom="12dp" android:baselineAligned="false">
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<LinearLayout android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:layout_marginEnd="16dp" android:orientation="vertical" android:paddingStart="24dp" android:paddingEnd="24dp" android:paddingTop="16dp" android:paddingBottom="16dp" android:background="@drawable/bg_glass">
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<TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_call_log" android:textAppearance="@style/Text.EV.Eyebrow" />
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<com.google.android.material.button.MaterialButton android:id="@+id/flush_now_button" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:text="@string/btn_flush_now" app:icon="@drawable/ic_refresh" app:iconGravity="textStart" style="@style/Widget.EV.Button.Outlined" />
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<TextView android:id="@+id/call_log_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:minHeight="180dp" android:text="@string/call_log_empty" android:textAppearance="@style/Text.EV.Body" android:fontFamily="monospace" android:textSize="17sp" android:lineSpacingExtra="12dp" android:textIsSelectable="true" />
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</LinearLayout>
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<LinearLayout android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:orientation="vertical" android:paddingStart="24dp" android:paddingEnd="24dp" android:paddingTop="16dp" android:paddingBottom="16dp" android:background="@drawable/bg_glass">
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<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:gravity="center_vertical">
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<TextView android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:text="@string/foreground_title" android:textAppearance="@style/Text.EV.Eyebrow" />
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<com.google.android.material.button.MaterialButton android:id="@+id/foreground_refresh_button" style="@style/Widget.EV.Button.Outlined" android:layout_width="48dp" android:layout_height="48dp" android:minWidth="0dp" android:padding="0dp" android:contentDescription="@string/btn_refresh" app:icon="@drawable/ic_refresh" app:iconGravity="textStart" app:iconPadding="0dp" app:iconTint="?attr/evAccent" />
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</LinearLayout>
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<TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp" android:text="@string/foreground_hint" android:textAppearance="@style/Text.EV.Secondary" />
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<TextView android:id="@+id/foreground_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" android:textAppearance="@style/Text.EV.Body" android:fontFamily="monospace" android:textSize="14sp" android:lineSpacingExtra="2dp" android:textIsSelectable="true" />
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</LinearLayout>
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</LinearLayout>
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</com.evsuite.abrp.StableScrollView>
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@@ -1,8 +1,18 @@
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<?xml version="1.0" encoding="utf-8"?>
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<com.evsuite.abrp.StableScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:fillViewport="true" android:clipToPadding="false">
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<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="24dp" android:background="@drawable/bg_glass">
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<TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_call_log" android:textAppearance="@style/Text.EV.Eyebrow" />
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<com.google.android.material.button.MaterialButton android:id="@+id/flush_now_button" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:text="@string/btn_flush_now" app:icon="@drawable/ic_refresh" app:iconGravity="textStart" style="@style/Widget.EV.Button.Outlined" xmlns:app="http://schemas.android.com/apk/res-auto" />
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<TextView android:id="@+id/call_log_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:minHeight="180dp" android:text="@string/call_log_empty" android:textAppearance="@style/Text.EV.Body" android:fontFamily="monospace" android:textSize="17sp" android:lineSpacingExtra="12dp" android:textIsSelectable="true" />
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<com.evsuite.abrp.StableScrollView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:fillViewport="true" android:clipToPadding="false">
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||||
<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical">
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||||
<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="24dp" android:background="@drawable/bg_glass">
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<TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_call_log" android:textAppearance="@style/Text.EV.Eyebrow" />
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<com.google.android.material.button.MaterialButton android:id="@+id/flush_now_button" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:text="@string/btn_flush_now" app:icon="@drawable/ic_refresh" app:iconGravity="textStart" style="@style/Widget.EV.Button.Outlined" />
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<TextView android:id="@+id/call_log_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:minHeight="180dp" android:text="@string/call_log_empty" android:textAppearance="@style/Text.EV.Body" android:fontFamily="monospace" android:textSize="17sp" android:lineSpacingExtra="12dp" android:textIsSelectable="true" />
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||||
</LinearLayout>
|
||||
<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="24dp" android:background="@drawable/bg_glass" android:layout_marginTop="16dp">
|
||||
<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:gravity="center_vertical">
|
||||
<TextView android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:text="@string/foreground_title" android:textAppearance="@style/Text.EV.Eyebrow" />
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||||
<com.google.android.material.button.MaterialButton android:id="@+id/foreground_refresh_button" style="@style/Widget.EV.Button.Outlined" android:layout_width="48dp" android:layout_height="48dp" android:minWidth="0dp" android:padding="0dp" android:contentDescription="@string/btn_refresh" app:icon="@drawable/ic_refresh" app:iconGravity="textStart" app:iconPadding="0dp" app:iconTint="?attr/evAccent" />
|
||||
</LinearLayout>
|
||||
<TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp" android:text="@string/foreground_hint" android:textAppearance="@style/Text.EV.Secondary" />
|
||||
<TextView android:id="@+id/foreground_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" android:textAppearance="@style/Text.EV.Body" android:fontFamily="monospace" android:textSize="14sp" android:lineSpacingExtra="2dp" android:textIsSelectable="true" />
|
||||
</LinearLayout>
|
||||
</LinearLayout>
|
||||
</com.evsuite.abrp.StableScrollView>
|
||||
|
||||
@@ -168,6 +168,15 @@
|
||||
<string name="label_call_log">Recent uploads</string>
|
||||
<string name="call_log_empty">No upload attempted yet.</string>
|
||||
<string name="btn_flush_now">Upload now</string>
|
||||
<string name="foreground_title">Foreground apps</string>
|
||||
<string name="foreground_hint">For the CarPlay full-screen test: open CarPlay, come back here, read its name off the list. Reads only.</string>
|
||||
<string name="foreground_recent">Last 30 minutes, newest first:</string>
|
||||
<string name="foreground_none">No app came to the front in the last 30 minutes.</string>
|
||||
<string name="foreground_unavailable">Not readable in this build: only the car build (system app) may see other apps.</string>
|
||||
<string name="foreground_tasks">Open tasks now, top first:</string>
|
||||
<string name="foreground_policy">policy_control: %1$s</string>
|
||||
<string name="foreground_policy_unset">not set</string>
|
||||
<string name="foreground_status_bar">Status bar height: %1$d px</string>
|
||||
<string name="status_starting">Starting…</string>
|
||||
<string name="status_running_no_upload">Running — waiting for first upload</string>
|
||||
<string name="status_last_upload">Last upload: %1$s (%2$s)</string>
|
||||
|
||||
@@ -0,0 +1,69 @@
|
||||
package com.evsuite.abrp;
|
||||
|
||||
import static org.junit.Assert.assertEquals;
|
||||
import static org.junit.Assert.assertNull;
|
||||
import static org.junit.Assert.assertTrue;
|
||||
|
||||
import java.util.Arrays;
|
||||
import java.util.Collections;
|
||||
import java.util.List;
|
||||
import java.util.TimeZone;
|
||||
|
||||
import org.junit.Test;
|
||||
|
||||
/** The Logs tab's foreground-app lines — pure JVM. */
|
||||
public class ForegroundHistoryTest {
|
||||
|
||||
private static final TimeZone UTC = TimeZone.getTimeZone("UTC");
|
||||
|
||||
private static ForegroundHistory.Event at(long seconds, String pkg, String cls) {
|
||||
return new ForegroundHistory.Event(seconds * 1000, pkg, cls);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void newestFirstWithTheActivityShortened() {
|
||||
List<String> lines = ForegroundHistory.lines(Arrays.asList(
|
||||
at(3600, "com.saic.launcher", "com.saic.launcher.Home"),
|
||||
at(3700, "com.example.carplay", "com.example.carplay.ui.ProjectionActivity")),
|
||||
10, UTC);
|
||||
assertEquals(Arrays.asList(
|
||||
"01:01:40 com.example.carplay .ui.ProjectionActivity",
|
||||
"01:00:00 com.saic.launcher .Home"), lines);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void repeatsOfTheSameScreenCollapse() {
|
||||
List<String> lines = ForegroundHistory.lines(Arrays.asList(
|
||||
at(1, "a.b", "a.b.Main"),
|
||||
at(2, "a.b", "a.b.Main"),
|
||||
at(3, "a.b", "a.b.Other"),
|
||||
at(4, "c.d", null),
|
||||
at(5, "c.d", null)), 10, UTC);
|
||||
assertEquals(Arrays.asList(
|
||||
"00:00:04 c.d",
|
||||
"00:00:03 a.b .Other",
|
||||
"00:00:01 a.b .Main"), lines);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void limitKeepsTheNewest() {
|
||||
List<String> lines = ForegroundHistory.lines(Arrays.asList(
|
||||
at(1, "one", null), at(2, "two", null), at(3, "three", null)), 2, UTC);
|
||||
assertEquals(Arrays.asList("00:00:03 three", "00:00:02 two"), lines);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void emptyAndBlankEventsGiveNoLines() {
|
||||
assertTrue(ForegroundHistory.lines(Collections.emptyList(), 10, UTC).isEmpty());
|
||||
assertTrue(ForegroundHistory.lines(Arrays.asList(null, at(1, "", null), at(2, null, "x")), 10, UTC).isEmpty());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void aClassOutsideItsPackageStaysWhole() {
|
||||
assertEquals("com.other.Activity", ForegroundHistory.shortClass("a.b", "com.other.Activity"));
|
||||
assertEquals(".Main", ForegroundHistory.shortClass("a.b", "a.b.Main"));
|
||||
assertNull(ForegroundHistory.shortClass("a.b", null));
|
||||
// "a.bc.Main" is not inside "a.b".
|
||||
assertEquals("a.bc.Main", ForegroundHistory.shortClass("a.b", "a.bc.Main"));
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user