diff --git a/SPECS.md b/SPECS.md
index c4c7e6d..0ec7454 100644
--- a/SPECS.md
+++ b/SPECS.md
@@ -114,6 +114,10 @@ tyre pressures, GPS (lat, lon, elevation, heading) and the is_* flags. It does *
   INGEST_TOKEN) into git and pushed it. Commit amended and force-pushed; both values regenerated in
   the now gitignored `k8s/secrets.yaml` (since moved to `k8s/secrets/secrets.yaml`, outside
   `kubectl apply -f k8s/`). Filled-in secrets live only there from now on.
+- 2026-10-17 — App 2.7.1: the voice key works. The car's key report, read off the on-screen log:
+  `android.intent.extra.hardkey.keycode` (Integer), `.down` (Boolean, a report per press and per
+  release), `.longpress` (Boolean). 2.7.0 looked only for short names and never found the code.
+  Floating button removed (it did not show over the MG4 launcher).
 - 2026-10-17 — App 2.7.0: a double press of the steering wheel's voice key (code 287) opens the
   app, from the head unit's `com.saic.keyevent.hardkey.report` broadcast. Its extras are not
   documented; the usual names are tried and every report is listed raw on the Logs tab. The
diff --git a/app/build.gradle b/app/build.gradle
index d2e59ae..f38b18d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -34,8 +34,8 @@ android {
         applicationId "com.stinnesbeck.nilsmg4"
         minSdk 27
         targetSdk 36
-        versionCode 64
-        versionName "2.7.0"
+        versionCode 65
+        versionName "2.7.1"
 
         // Nothing about the server ships in the APK: its URL and ingest token are entered in
         // the app's Server tab (ServerConfig), and the database is only reachable by the server.
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 191f880..36b8413 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -13,8 +13,6 @@
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_LOCATION" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
-    <!-- The floating button that opens the app; the head unit's launcher does not list it. -->
-    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
 
     <!-- Wi-Fi auto-join. CHANGE_WIFI_STATE covers enabling the radio and asking the
          supplicant to join a network the unit already has saved; ACCESS_WIFI_STATE covers
diff --git a/app/src/main/java/com/evsuite/abrp/AbrpUploadService.java b/app/src/main/java/com/evsuite/abrp/AbrpUploadService.java
index 8431b91..ec9e2ae 100644
--- a/app/src/main/java/com/evsuite/abrp/AbrpUploadService.java
+++ b/app/src/main/java/com/evsuite/abrp/AbrpUploadService.java
@@ -67,7 +67,6 @@ public class AbrpUploadService extends Service {
     private ConsumptionCloudClient consumptionCloudClient;
     private ChargeSessionTracker chargeSessionTracker;
     private TelemetryUploader telemetryUploader;
-    private FloatingButton floatingButton;
     private SteeringKeyListener steeringKeys;
     private WifiAutoConnect wifi;
     private ScheduledExecutorService scheduler;
@@ -100,9 +99,6 @@ public class AbrpUploadService extends Service {
         chargeSessionTracker = ChargeSessionTracker.get(getApplicationContext());
         wifi = new WifiAutoConnect(getApplicationContext());
         telemetryUploader = new TelemetryUploader(getApplicationContext());
-        // onCreate runs on the main thread, where the overlay window must be added.
-        floatingButton = new FloatingButton(this, prefs);
-        FloatingButton.attach(floatingButton);
         steeringKeys = new SteeringKeyListener(this, prefs);
         steeringKeys.register();
 
@@ -146,7 +142,6 @@ public class AbrpUploadService extends Service {
         prefs.edit().putBoolean("service_running", false).apply();
         if (scheduler != null) scheduler.shutdownNow();
         if (telemetryUploader != null) telemetryUploader.stop();
-        if (floatingButton != null) FloatingButton.detach(floatingButton);
         if (steeringKeys != null) steeringKeys.unregister();
         Log.i(TAG, "Service stopped");
     }
diff --git a/app/src/main/java/com/evsuite/abrp/FloatingButton.java b/app/src/main/java/com/evsuite/abrp/FloatingButton.java
deleted file mode 100644
index 9b6fc9f..0000000
--- a/app/src/main/java/com/evsuite/abrp/FloatingButton.java
+++ /dev/null
@@ -1,224 +0,0 @@
-package com.evsuite.abrp;
-
-import android.annotation.SuppressLint;
-import android.content.Context;
-import android.content.Intent;
-import android.content.SharedPreferences;
-import android.graphics.PixelFormat;
-import android.graphics.drawable.GradientDrawable;
-import android.os.Handler;
-import android.os.Looper;
-import android.provider.Settings;
-import android.util.DisplayMetrics;
-import android.util.Log;
-import android.view.Gravity;
-import android.view.MotionEvent;
-import android.view.View;
-import android.view.ViewConfiguration;
-import android.view.WindowManager;
-import android.widget.FrameLayout;
-import android.widget.ImageView;
-
-/**
- * A small round button floating over every app, so the app can be opened on a head unit whose
- * launcher does not list it. Tap opens the app; drag moves the button, and the position is kept.
- *
- * Owned by the always-on {@link AbrpUploadService}, so it is there from boot. Hidden while the
- * app itself is in front ({@link #setAppInForeground}) and when switched off in the Upload tab.
- *
- * Drawing over other apps needs the overlay permission, which the car build holds through the
- * system UID. Without it — or if the window manager refuses — the button simply stays away:
- * a third-party app must never crash the head unit (AGENTS.md).
- *
- * All methods run on the main thread.
- */
-final class FloatingButton {
-
-    private static final String TAG = "NilsMG4.Floating";
-    static final String KEY_X = "floating_button_x";
-    static final String KEY_Y = "floating_button_y";
-    private static final int SIZE_DP = 64;
-    private static final int MARGIN_DP = 16;
-    private static final float GLYPH_SCALE = 1.45f;
-
-    private static final Handler MAIN = new Handler(Looper.getMainLooper());
-    private static FloatingButton current;
-    private static boolean appInForeground;
-
-    private final Context context;
-    private final SharedPreferences prefs;
-    private final WindowManager windowManager;
-    private View view;
-    private WindowManager.LayoutParams params;
-    private boolean added;
-
-    FloatingButton(Context context, SharedPreferences prefs) {
-        this.context = context.getApplicationContext();
-        this.prefs = prefs;
-        this.windowManager = (WindowManager) this.context.getSystemService(Context.WINDOW_SERVICE);
-    }
-
-    // ---------- Static hooks for the activity and the settings switch ----------
-
-    static void attach(FloatingButton button) {
-        current = button;
-        button.update();
-    }
-
-    static void detach(FloatingButton button) {
-        if (current == button) current = null;
-        button.removeView();
-    }
-
-    /** MainActivity's onResume/onPause: no button on top of the app itself. */
-    static void setAppInForeground(boolean inForeground) {
-        appInForeground = inForeground;
-        refresh();
-    }
-
-    /** Re-reads the switch and the permission; posted, so callable from anywhere. */
-    static void refresh() {
-        MAIN.post(() -> {
-            if (current != null) current.update();
-        });
-    }
-
-    static boolean canDraw(Context context) {
-        return Settings.canDrawOverlays(context);
-    }
-
-    // ---------- Showing and hiding ----------
-
-    void update() {
-        boolean wanted = UploadSettings.floatingButtonEnabled(prefs) && !appInForeground && canDraw(context);
-        if (wanted && !added) addView();
-        else if (!wanted && added) removeView();
-    }
-
-    private void addView() {
-        try {
-            if (view == null) view = createView();
-            DisplayMetrics metrics = new DisplayMetrics();
-            windowManager.getDefaultDisplay().getRealMetrics(metrics);
-            int size = dp(SIZE_DP);
-            int[] start = FloatingButtonGeometry.defaultPosition(
-                    metrics.widthPixels, metrics.heightPixels, size, dp(MARGIN_DP));
-            params = new WindowManager.LayoutParams(size, size,
-                    WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
-                    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
-                            | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
-                    PixelFormat.TRANSLUCENT);
-            params.gravity = Gravity.TOP | Gravity.START;
-            params.x = FloatingButtonGeometry.clamp(prefs.getInt(KEY_X, start[0]), size, metrics.widthPixels);
-            params.y = FloatingButtonGeometry.clamp(prefs.getInt(KEY_Y, start[1]), size, metrics.heightPixels);
-            windowManager.addView(view, params);
-            added = true;
-        } catch (RuntimeException e) {
-            // BadTokenException, SecurityException, or anything else the platform throws: no button.
-            Log.w(TAG, "Floating button not shown: " + e);
-            added = false;
-        }
-    }
-
-    void removeView() {
-        if (!added) return;
-        try {
-            windowManager.removeView(view);
-        } catch (RuntimeException e) {
-            Log.w(TAG, "Floating button not removed cleanly: " + e);
-        }
-        added = false;
-    }
-
-    private View createView() {
-        FrameLayout frame = new FrameLayout(context);
-        GradientDrawable circle = new GradientDrawable();
-        circle.setShape(GradientDrawable.OVAL);
-        circle.setColor(context.getColor(R.color.ev_accent));
-        circle.setStroke(dp(2), context.getColor(R.color.ev_text_primary));
-        frame.setBackground(circle);
-        frame.setAlpha(0.9f);
-        frame.setElevation(dp(6));
-        frame.setContentDescription(context.getString(R.string.floating_button_description));
-        ImageView glyph = new ImageView(context);
-        glyph.setImageResource(R.drawable.ic_launcher_monochrome);
-        glyph.setScaleType(ImageView.ScaleType.FIT_CENTER);
-        // The launcher glyph keeps the adaptive-icon safe zone (a third of it empty margin);
-        // enlarged here and clipped by the circle, it fills the button instead of a corner of it.
-        glyph.setScaleX(GLYPH_SCALE);
-        glyph.setScaleY(GLYPH_SCALE);
-        frame.addView(glyph, new FrameLayout.LayoutParams(
-                FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT));
-        frame.setClipToOutline(true);
-        frame.setOutlineProvider(android.view.ViewOutlineProvider.BACKGROUND);
-        frame.setOnTouchListener(new DragOrTap());
-        return frame;
-    }
-
-    // ---------- Touch: drag moves, tap opens ----------
-
-    private final class DragOrTap implements View.OnTouchListener {
-        private final int touchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
-        private float downRawX, downRawY;
-        private int downX, downY;
-        private boolean dragging;
-
-        @SuppressLint("ClickableViewAccessibility") // a tap opens the app, as a click would
-        @Override
-        public boolean onTouch(View v, MotionEvent event) {
-            switch (event.getActionMasked()) {
-                case MotionEvent.ACTION_DOWN:
-                    downRawX = event.getRawX();
-                    downRawY = event.getRawY();
-                    downX = params.x;
-                    downY = params.y;
-                    dragging = false;
-                    return true;
-                case MotionEvent.ACTION_MOVE: {
-                    float dx = event.getRawX() - downRawX;
-                    float dy = event.getRawY() - downRawY;
-                    if (!dragging && FloatingButtonGeometry.isTap(dx, dy, touchSlop)) return true;
-                    dragging = true;
-                    moveTo(downX + Math.round(dx), downY + Math.round(dy));
-                    return true;
-                }
-                case MotionEvent.ACTION_UP:
-                    if (dragging) {
-                        prefs.edit().putInt(KEY_X, params.x).putInt(KEY_Y, params.y).apply();
-                    } else {
-                        openApp();
-                    }
-                    return true;
-                case MotionEvent.ACTION_CANCEL:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-    }
-
-    private void moveTo(int x, int y) {
-        DisplayMetrics metrics = new DisplayMetrics();
-        windowManager.getDefaultDisplay().getRealMetrics(metrics);
-        params.x = FloatingButtonGeometry.clamp(x, params.width, metrics.widthPixels);
-        params.y = FloatingButtonGeometry.clamp(y, params.height, metrics.heightPixels);
-        try {
-            windowManager.updateViewLayout(view, params);
-        } catch (RuntimeException e) {
-            Log.w(TAG, "Floating button not moved: " + e);
-        }
-    }
-
-    private void openApp() {
-        try {
-            context.startActivity(new Intent(context, MainActivity.class)
-                    .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_REORDER_TO_FRONT));
-        } catch (RuntimeException e) {
-            Log.w(TAG, "App not opened: " + e);
-        }
-    }
-
-    private int dp(int value) {
-        return Math.round(value * context.getResources().getDisplayMetrics().density);
-    }
-}
diff --git a/app/src/main/java/com/evsuite/abrp/FloatingButtonGeometry.java b/app/src/main/java/com/evsuite/abrp/FloatingButtonGeometry.java
deleted file mode 100644
index 022300d..0000000
--- a/app/src/main/java/com/evsuite/abrp/FloatingButtonGeometry.java
+++ /dev/null
@@ -1,31 +0,0 @@
-package com.evsuite.abrp;
-
-/**
- * Where the floating button sits and whether a touch was a tap. Android-free, unit-tested.
- * Positions are the button's top-left corner in pixels, as WindowManager takes them.
- */
-final class FloatingButtonGeometry {
-
-    /** How far down the screen the button starts, as a fraction of the height. */
-    static final float DEFAULT_TOP_FRACTION = 0.4f;
-
-    private FloatingButtonGeometry() { }
-
-    /** Right edge, about 40 % down, inset by [margin] from the edge. */
-    static int[] defaultPosition(int screenWidth, int screenHeight, int size, int margin) {
-        return new int[]{
-                clamp(screenWidth - size - margin, size, screenWidth),
-                clamp(Math.round(screenHeight * DEFAULT_TOP_FRACTION), size, screenHeight)};
-    }
-
-    /** Keeps the whole button on screen, whatever position was saved or dragged to. */
-    static int clamp(int position, int size, int screen) {
-        int max = Math.max(0, screen - size);
-        return Math.max(0, Math.min(position, max));
-    }
-
-    /** A touch that moved no further than the system touch slop is a tap, not a drag. */
-    static boolean isTap(float dx, float dy, int touchSlop) {
-        return dx * dx + dy * dy <= (float) touchSlop * touchSlop;
-    }
-}
diff --git a/app/src/main/java/com/evsuite/abrp/MainActivity.java b/app/src/main/java/com/evsuite/abrp/MainActivity.java
index 2b21fb7..fae8d78 100644
--- a/app/src/main/java/com/evsuite/abrp/MainActivity.java
+++ b/app/src/main/java/com/evsuite/abrp/MainActivity.java
@@ -120,9 +120,8 @@ public class MainActivity extends AppCompatActivity {
     private TextView connectionStatusText;
 
     /** Upload page: live telemetry switch and cadence. */
-    private SwitchMaterial liveTelemetrySwitch, boostSwitch, floatingButtonSwitch, voiceKeySwitch;
+    private SwitchMaterial liveTelemetrySwitch, boostSwitch, voiceKeySwitch;
     private TextView steeringKeysText;
-    private View overlayPermissionNote;
     private android.widget.Spinner intervalSpinner;
     private TextInputLayout lowSocLayout;
     private TextInputEditText lowSocInput;
@@ -307,8 +306,6 @@ public class MainActivity extends AppCompatActivity {
         super.onResume();
         // Poll state and log only while the screen is up; onPause cancels it.
         uiHandler.post(uiRefresh);
-        FloatingButton.setAppInForeground(true);
-        refreshOverlayPermissionNote();
     }
 
     @Override
@@ -316,7 +313,6 @@ public class MainActivity extends AppCompatActivity {
         super.onPause();
         // Stop polling off-screen: this activity has no reason to spend cycles then.
         uiHandler.removeCallbacks(uiRefresh);
-        FloatingButton.setAppInForeground(false);
     }
 
     // ---------- Update check ----------
@@ -802,22 +798,6 @@ public class MainActivity extends AppCompatActivity {
         voiceKeySwitch.setChecked(UploadSettings.voiceKeyOpensApp(prefs));
         voiceKeySwitch.setOnCheckedChangeListener((btn, checked) ->
                 prefs.edit().putBoolean(UploadSettings.KEY_VOICE_KEY_OPENS, checked).apply());
-        floatingButtonSwitch = servicePane.findViewById(R.id.floating_button_switch);
-        overlayPermissionNote = servicePane.findViewById(R.id.overlay_permission_note);
-        floatingButtonSwitch.setChecked(UploadSettings.floatingButtonEnabled(prefs));
-        floatingButtonSwitch.setOnCheckedChangeListener((btn, checked) -> {
-            prefs.edit().putBoolean(UploadSettings.KEY_FLOATING_BUTTON, checked).apply();
-            FloatingButton.refresh();
-            refreshOverlayPermissionNote();
-        });
-        servicePane.findViewById(R.id.overlay_permission_button).setOnClickListener(v -> {
-            try {
-                startActivity(new Intent(android.provider.Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
-                        Uri.parse("package:" + getPackageName())));
-            } catch (android.content.ActivityNotFoundException e) {
-                Toast.makeText(this, R.string.overlay_settings_missing, Toast.LENGTH_LONG).show();
-            }
-        });
         liveTelemetrySwitch = servicePane.findViewById(R.id.abrp_upload_switch);
         intervalSpinner = servicePane.findViewById(R.id.interval_spinner);
         boostSwitch = servicePane.findViewById(R.id.boost_switch);
@@ -874,16 +854,6 @@ public class MainActivity extends AppCompatActivity {
         });
     }
 
-    /**
-     * The note under the floating-button switch: only when the button is wanted but this build
-     * may not draw over other apps (the car build may, through the system UID).
-     */
-    private void refreshOverlayPermissionNote() {
-        if (overlayPermissionNote == null) return;
-        boolean missing = UploadSettings.floatingButtonEnabled(prefs) && !FloatingButton.canDraw(this);
-        overlayPermissionNote.setVisibility(missing ? View.VISIBLE : View.GONE);
-    }
-
     /** Clamped to 1-99: 0 would never trigger and 100 would boost permanently. */
     private void saveLowSocThreshold() {
         CharSequence raw = lowSocInput.getText();
diff --git a/app/src/main/java/com/evsuite/abrp/SteeringKeyListener.java b/app/src/main/java/com/evsuite/abrp/SteeringKeyListener.java
index 45431e5..ec377f6 100644
--- a/app/src/main/java/com/evsuite/abrp/SteeringKeyListener.java
+++ b/app/src/main/java/com/evsuite/abrp/SteeringKeyListener.java
@@ -20,9 +20,9 @@ import java.util.Locale;
  * Opens the app on a double press of the steering wheel's voice key.
  *
  * The head unit reports steering-wheel keys as the broadcast {@link #ACTION}; code 287 is the
- * voice key (see EVHardware's PhysicalButtonEventDecoder). How the broadcast carries the code
- * and the press is not documented, so the usual extras are tried, and every broadcast is kept
- * raw for the Logs tab — if the guess misses, that list says exactly what the car sends.
+ * voice key (see EVHardware's PhysicalButtonEventDecoder). The extras' format was read off the
+ * car (see {@link SteeringKeyReport}); every report is still kept raw for the Logs tab, in case
+ * another firmware sends them differently.
  *
  * Registered by the always-on service on the main thread; never throws into the head unit.
  */
@@ -93,7 +93,7 @@ final class SteeringKeyListener {
 
     private void handle(Intent intent) {
         Bundle extras = intent.getExtras();
-        Parsed key = parse(extras);
+        SteeringKeyReport key = read(extras);
         boolean opens = false;
         if (key.code != null && UploadSettings.voiceKeyOpensApp(prefs)) {
             opens = detector.accept(key.code, key.down, key.longPress, android.os.SystemClock.elapsedRealtime());
@@ -113,67 +113,21 @@ final class SteeringKeyListener {
         }
     }
 
-    // ---------- Reading an undocumented broadcast ----------
+    // ---------- Reading the broadcast ----------
 
-    static final class Parsed {
-        Integer code;
-        Boolean down;
-        boolean longPress;
-    }
-
-    private static final String[] CODE_KEYS = {"keyCode", "keycode", "key_code", "KEY_CODE", "keyValue",
-            "key_value", "code", "key"};
-    private static final String[] ACTION_KEYS = {"keyAction", "key_action", "KEY_ACTION", "action",
-            "keyState", "key_state", "state", "event", "type"};
-    private static final String[] DOWN_KEYS = {"down", "isDown", "pressed", "isPressed"};
-    private static final String[] LONG_KEYS = {"longPress", "isLongPress", "long_press", "isLong", "long"};
-
-    static Parsed parse(Bundle extras) {
-        Parsed p = new Parsed();
-        if (extras == null) return p;
+    /** An embedded KeyEvent if there is one, otherwise the extras by name (SteeringKeyReport). */
+    static SteeringKeyReport read(Bundle extras) {
+        if (extras == null) return SteeringKeyReport.parse(null);
+        java.util.Map<String, Object> values = new java.util.HashMap<>();
         for (String k : extras.keySet()) {
             Object v = extras.get(k);
             if (v instanceof KeyEvent) {
                 KeyEvent e = (KeyEvent) v;
-                p.code = e.getKeyCode();
-                p.down = e.getAction() == KeyEvent.ACTION_DOWN;
-                p.longPress = e.isLongPress();
-                return p;
+                return new SteeringKeyReport(e.getKeyCode(), e.getAction() == KeyEvent.ACTION_DOWN, e.isLongPress());
             }
+            values.put(k, v);
         }
-        p.code = firstInt(extras, CODE_KEYS);
-        Integer action = firstInt(extras, ACTION_KEYS);
-        // KeyEvent's own convention: 0 down, 1 up; anything else (often 2) is a long press.
-        if (action != null) {
-            if (action == 0) p.down = true;
-            else if (action == 1) p.down = false;
-            else p.longPress = true;
-        }
-        Boolean down = firstBoolean(extras, DOWN_KEYS);
-        if (down != null) p.down = down;
-        Boolean longPress = firstBoolean(extras, LONG_KEYS);
-        if (longPress != null) p.longPress = longPress;
-        return p;
-    }
-
-    private static Integer firstInt(Bundle b, String[] keys) {
-        for (String k : keys) {
-            Object v = b.get(k);
-            if (v instanceof Integer) return (Integer) v;
-            if (v instanceof Long) return (int) (long) (Long) v;
-            if (v instanceof String) {
-                try { return Integer.parseInt(((String) v).trim()); } catch (NumberFormatException ignored) { }
-            }
-        }
-        return null;
-    }
-
-    private static Boolean firstBoolean(Bundle b, String[] keys) {
-        for (String k : keys) {
-            Object v = b.get(k);
-            if (v instanceof Boolean) return (Boolean) v;
-        }
-        return null;
+        return SteeringKeyReport.parse(values);
     }
 
     /** All extras as name=value(type), so the Logs tab shows the real format. */
diff --git a/app/src/main/java/com/evsuite/abrp/SteeringKeyReport.java b/app/src/main/java/com/evsuite/abrp/SteeringKeyReport.java
new file mode 100644
index 0000000..eb864de
--- /dev/null
+++ b/app/src/main/java/com/evsuite/abrp/SteeringKeyReport.java
@@ -0,0 +1,82 @@
+package com.evsuite.abrp;
+
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+
+/**
+ * Reads one steering-wheel key report from the broadcast's extras.
+ *
+ * Seen on the MG4 (2026-10-17, on-screen key log): the head unit sends
+ *   android.intent.extra.hardkey.keycode   = 287   (Integer)
+ *   android.intent.extra.hardkey.down      = true  (Boolean, then false on release)
+ *   android.intent.extra.hardkey.longpress = false (Boolean)
+ * Names are matched on their last dot-separated part, case-insensitively, so this exact form
+ * and simpler ones ("keyCode", "down", …) are both understood.
+ *
+ * Android-free (the extras arrive as a plain map), unit-tested.
+ */
+final class SteeringKeyReport {
+
+    final Integer code;
+    final Boolean down;
+    final boolean longPress;
+
+    SteeringKeyReport(Integer code, Boolean down, boolean longPress) {
+        this.code = code;
+        this.down = down;
+        this.longPress = longPress;
+    }
+
+    private static final String[] CODE_NAMES = {"keycode", "key_code", "keyvalue", "key_value", "code", "key"};
+    private static final String[] ACTION_NAMES = {"keyaction", "key_action", "action", "keystate", "key_state",
+            "state", "event", "type"};
+    private static final String[] DOWN_NAMES = {"down", "isdown", "pressed", "ispressed"};
+    private static final String[] LONG_NAMES = {"longpress", "islongpress", "long_press", "islong", "long"};
+
+    static SteeringKeyReport parse(Map<String, Object> extras) {
+        Map<String, Object> byName = new HashMap<>();
+        if (extras != null) {
+            for (Map.Entry<String, Object> e : extras.entrySet()) {
+                String key = e.getKey();
+                String last = key.substring(key.lastIndexOf('.') + 1).toLowerCase(Locale.US);
+                byName.putIfAbsent(last, e.getValue());
+            }
+        }
+        Integer code = firstInt(byName, CODE_NAMES);
+        Boolean down = null;
+        boolean longPress = false;
+        // KeyEvent's own convention for a numeric action: 0 down, 1 up; anything else is long.
+        Integer action = firstInt(byName, ACTION_NAMES);
+        if (action != null) {
+            if (action == 0) down = true;
+            else if (action == 1) down = false;
+            else longPress = true;
+        }
+        Boolean explicitDown = firstBoolean(byName, DOWN_NAMES);
+        if (explicitDown != null) down = explicitDown;
+        Boolean explicitLong = firstBoolean(byName, LONG_NAMES);
+        if (explicitLong != null) longPress = explicitLong;
+        return new SteeringKeyReport(code, down, longPress);
+    }
+
+    private static Integer firstInt(Map<String, Object> byName, String[] names) {
+        for (String n : names) {
+            Object v = byName.get(n);
+            if (v instanceof Integer) return (Integer) v;
+            if (v instanceof Long) return (int) (long) (Long) v;
+            if (v instanceof String) {
+                try { return Integer.parseInt(((String) v).trim()); } catch (NumberFormatException ignored) { }
+            }
+        }
+        return null;
+    }
+
+    private static Boolean firstBoolean(Map<String, Object> byName, String[] names) {
+        for (String n : names) {
+            Object v = byName.get(n);
+            if (v instanceof Boolean) return (Boolean) v;
+        }
+        return null;
+    }
+}
diff --git a/app/src/main/java/com/evsuite/abrp/UploadSettings.java b/app/src/main/java/com/evsuite/abrp/UploadSettings.java
index aa00d32..fd3d717 100644
--- a/app/src/main/java/com/evsuite/abrp/UploadSettings.java
+++ b/app/src/main/java/com/evsuite/abrp/UploadSettings.java
@@ -16,10 +16,6 @@ final class UploadSettings {
     static final String KEY_LOW_SOC_PERCENT = "low_soc_percent";
     static final String KEY_AUTOSTART       = "autostart";
     static final String KEY_ABRP_UPLOAD_ENABLED = "abrp_upload_enabled";
-    /** The floating button that opens the app over the head unit's own screens. */
-    static final String KEY_FLOATING_BUTTON = "floating_button";
-    static final boolean DEFAULT_FLOATING_BUTTON = true;
-
     /** A double press of the steering wheel's voice key opens the app. */
     static final String KEY_VOICE_KEY_OPENS = "voice_key_opens_app";
 
@@ -27,10 +23,6 @@ final class UploadSettings {
         return prefs.getBoolean(KEY_VOICE_KEY_OPENS, true);
     }
 
-    static boolean floatingButtonEnabled(SharedPreferences prefs) {
-        return prefs.getBoolean(KEY_FLOATING_BUTTON, DEFAULT_FLOATING_BUTTON);
-    }
-
     /**
      * On by default: an ABRP plan is only useful if it is fed from the moment the drive
      * starts, and nobody opens this app before setting off. Kept as a switch because a
diff --git a/app/src/main/res/layout-w1000dp/pane_service.xml b/app/src/main/res/layout-w1000dp/pane_service.xml
index 9506515..ea2863f 100644
--- a/app/src/main/res/layout-w1000dp/pane_service.xml
+++ b/app/src/main/res/layout-w1000dp/pane_service.xml
@@ -8,12 +8,6 @@
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_abrp_upload_enabled" android:textAppearance="@style/Text.EV.Secondary" />
             <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/voice_key_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_voice_key" android:textAppearance="@style/Text.EV.Body" android:paddingTop="8dp" android:paddingBottom="8dp" app:useMaterialThemeColors="true" app:thumbTint="@color/switch_thumb" app:trackTint="@color/switch_track" android:textColor="@color/ev_text_primary" />
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_voice_key" android:textAppearance="@style/Text.EV.Secondary" />
-            <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/floating_button_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_floating_button" android:textAppearance="@style/Text.EV.Body" android:paddingTop="8dp" android:paddingBottom="8dp" app:useMaterialThemeColors="true" app:thumbTint="@color/switch_thumb" app:trackTint="@color/switch_track" android:textColor="@color/ev_text_primary" />
-            <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_floating_button" android:textAppearance="@style/Text.EV.Secondary" />
-            <LinearLayout android:id="@+id/overlay_permission_note" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:layout_marginTop="8dp" android:visibility="gone">
-                <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/overlay_permission_missing" android:textAppearance="@style/Text.EV.Secondary" android:textColor="@color/ev_error" />
-                <com.google.android.material.button.MaterialButton android:id="@+id/overlay_permission_button" style="@style/Widget.EV.Button.Outlined" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="8dp" android:text="@string/btn_overlay_permission" />
-            </LinearLayout>
         </LinearLayout>
         <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical" android:padding="24dp" android:background="@drawable/bg_glass">
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/design_service_timing" android:textAppearance="@style/Text.EV.Eyebrow" />
diff --git a/app/src/main/res/layout/pane_service.xml b/app/src/main/res/layout/pane_service.xml
index 2a70e57..b14540c 100644
--- a/app/src/main/res/layout/pane_service.xml
+++ b/app/src/main/res/layout/pane_service.xml
@@ -8,12 +8,6 @@
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_abrp_upload_enabled" android:textAppearance="@style/Text.EV.Secondary" />
             <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/voice_key_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_voice_key" android:textAppearance="@style/Text.EV.Body" android:paddingTop="8dp" android:paddingBottom="8dp" app:useMaterialThemeColors="true" app:thumbTint="@color/switch_thumb" app:trackTint="@color/switch_track" android:textColor="@color/ev_text_primary" />
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_voice_key" android:textAppearance="@style/Text.EV.Secondary" />
-            <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/floating_button_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_floating_button" android:textAppearance="@style/Text.EV.Body" android:paddingTop="8dp" android:paddingBottom="8dp" app:useMaterialThemeColors="true" app:thumbTint="@color/switch_thumb" app:trackTint="@color/switch_track" android:textColor="@color/ev_text_primary" />
-            <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_floating_button" android:textAppearance="@style/Text.EV.Secondary" />
-            <LinearLayout android:id="@+id/overlay_permission_note" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:layout_marginTop="8dp" android:visibility="gone">
-                <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/overlay_permission_missing" android:textAppearance="@style/Text.EV.Secondary" android:textColor="@color/ev_error" />
-                <com.google.android.material.button.MaterialButton android:id="@+id/overlay_permission_button" style="@style/Widget.EV.Button.Outlined" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="8dp" android:text="@string/btn_overlay_permission" />
-            </LinearLayout>
         </LinearLayout>
         <Space android:layout_width="1dp" android:layout_height="20dp" />
         <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="24dp" android:background="@drawable/bg_glass">
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 79f6bc4..9f7431d 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -112,12 +112,6 @@
     <string name="label_steering_keys">Steering-wheel keys</string>
     <string name="hint_steering_keys">The last key reports the car sent, newest first. If double-pressing the voice key does not open the app, a photo of this list shows how the car reports it.</string>
     <string name="steering_keys_empty">No key reports received yet. Press a steering-wheel key.</string>
-    <string name="label_floating_button">Show floating button</string>
-    <string name="hint_floating_button">A small round button over the car\'s screens that opens this app. Drag it to move it; it hides while the app is open.</string>
-    <string name="overlay_permission_missing">This build may not draw over other apps, so the button cannot appear.</string>
-    <string name="btn_overlay_permission">Allow display over other apps</string>
-    <string name="overlay_settings_missing">The system screen for this permission is not available here</string>
-    <string name="floating_button_description">Open Nils\' MG4</string>
     <string name="label_abrp_upload_enabled">Send live telemetry to the server</string>
     <string name="hint_abrp_upload_enabled">The server stores it and forwards it to ABRP. Turn this off when another app feeds ABRP; consumption and charging tracking keep running.</string>
 
diff --git a/app/src/test/java/com/evsuite/abrp/FloatingButtonGeometryTest.java b/app/src/test/java/com/evsuite/abrp/FloatingButtonGeometryTest.java
deleted file mode 100644
index ae4d5c5..0000000
--- a/app/src/test/java/com/evsuite/abrp/FloatingButtonGeometryTest.java
+++ /dev/null
@@ -1,37 +0,0 @@
-package com.evsuite.abrp;
-
-import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
-
-import org.junit.Test;
-
-/** The floating button's position and tap rules — pure JVM. */
-public class FloatingButtonGeometryTest {
-
-    @Test
-    public void startsAtTheRightEdgeAboutFortyPercentDown() {
-        // The MG4 head unit is 1920 x 720; 64 px button, 16 px margin.
-        assertArrayEquals(new int[]{1840, 288}, FloatingButtonGeometry.defaultPosition(1920, 720, 64, 16));
-    }
-
-    @Test
-    public void staysFullyOnScreen() {
-        assertEquals(0, FloatingButtonGeometry.clamp(-50, 64, 1920));
-        assertEquals(1856, FloatingButtonGeometry.clamp(5000, 64, 1920));
-        assertEquals(700, FloatingButtonGeometry.clamp(700, 64, 1920));
-        // A saved position from a larger screen still lands inside a smaller one.
-        assertEquals(720 - 64, FloatingButtonGeometry.clamp(1000, 64, 720));
-        // A screen smaller than the button pins it to the corner instead of going negative.
-        assertEquals(0, FloatingButtonGeometry.clamp(10, 64, 40));
-    }
-
-    @Test
-    public void aTouchWithinTheSlopIsATapAnythingFurtherADrag() {
-        assertTrue(FloatingButtonGeometry.isTap(0, 0, 8));
-        assertTrue(FloatingButtonGeometry.isTap(5, -6, 8));    // 7.8 px
-        assertFalse(FloatingButtonGeometry.isTap(6, 6, 8));    // 8.5 px
-        assertFalse(FloatingButtonGeometry.isTap(0, 40, 8));
-    }
-}
diff --git a/app/src/test/java/com/evsuite/abrp/SteeringKeyReportTest.java b/app/src/test/java/com/evsuite/abrp/SteeringKeyReportTest.java
new file mode 100644
index 0000000..57cdc08
--- /dev/null
+++ b/app/src/test/java/com/evsuite/abrp/SteeringKeyReportTest.java
@@ -0,0 +1,66 @@
+package com.evsuite.abrp;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.Test;
+
+/** Reading the head unit's key reports, as seen on the MG4 — pure JVM. */
+public class SteeringKeyReportTest {
+
+    private static Map<String, Object> car(int code, boolean down, boolean longPress) {
+        Map<String, Object> m = new HashMap<>();
+        m.put("android.intent.extra.hardkey.keycode", code);
+        m.put("android.intent.extra.hardkey.down", down);
+        m.put("android.intent.extra.hardkey.longpress", longPress);
+        return m;
+    }
+
+    @Test
+    public void readsTheMg4Format() {
+        SteeringKeyReport r = SteeringKeyReport.parse(car(287, true, false));
+        assertEquals(Integer.valueOf(287), r.code);
+        assertEquals(Boolean.TRUE, r.down);
+        assertFalse(r.longPress);
+        assertEquals(Boolean.FALSE, SteeringKeyReport.parse(car(287, false, false)).down);
+        assertTrue(SteeringKeyReport.parse(car(287, true, true)).longPress);
+    }
+
+    @Test
+    public void theDoublePressFromTheCarOpensTheApp() {
+        // The sequence logged on the MG4 at 23:31:02: down .300, up .442, down .545, up .721.
+        DoublePressDetector d = new DoublePressDetector(SteeringKeyListener.VOICE_KEY);
+        long[] at = {300, 442, 545, 721};
+        boolean[] down = {true, false, true, false};
+        boolean opened = false;
+        for (int i = 0; i < at.length; i++) {
+            SteeringKeyReport r = SteeringKeyReport.parse(car(287, down[i], false));
+            opened |= d.accept(r.code, r.down, r.longPress, at[i]);
+        }
+        assertTrue(opened);
+    }
+
+    @Test
+    public void simpleNamesStillWork() {
+        Map<String, Object> m = new HashMap<>();
+        m.put("keyCode", 17);
+        m.put("action", 1);
+        SteeringKeyReport r = SteeringKeyReport.parse(m);
+        assertEquals(Integer.valueOf(17), r.code);
+        assertEquals(Boolean.FALSE, r.down);
+    }
+
+    @Test
+    public void nothingUsableStaysUnknown() {
+        SteeringKeyReport r = SteeringKeyReport.parse(new HashMap<>());
+        assertNull(r.code);
+        assertNull(r.down);
+        assertFalse(r.longPress);
+        assertNull(SteeringKeyReport.parse(null).code);
+    }
+}