App 2.16.3: full screen stays with drop-downs and dialogs

Opening a drop-down or a dialog brought the car's bars back until it
closed: each is a window of its own, and the system shows the bars when
a window without the full-screen flags takes focus.

- The drop-downs (upload frequency, tyre pressure unit, accent colour)
  are now single-choice buttons on the page: no extra window, one tap
  instead of two, full touch targets, the choice in the accent colour.
- Dialogs (About, update, pairing, phone settings, trip reset, date
  picker) are shown unfocusable, given the activity's full-screen
  flags, and only then allowed focus. None of them takes typing, which
  an unfocusable window would block.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki

SPECS.md

@@ -112,6 +112,11 @@ 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.
+- 2026-10-18 — App 2.16.3: full screen stays while choosing or reading a dialog. Drop-downs (upload
+  frequency, tyre unit, accent colour) are now buttons on the page: a drop-down is a window of its
+  own without the full-screen flags, so the car showed its bars while it was open. Dialogs are
+  shown unfocusable, given the activity's full-screen flags, then allowed focus
+  (`showKeepingFullScreen`); none of them takes typing.
 - 2026-10-18 — From the car (2.16.2): screen 1920×720 px at 160 dpi with a 1778×720 px app
   window, so EVProfile's 1280×480 does not apply; colour probe found only `vehicle_type = AS28`.
   FIRMWARE.md, mise.toml and SPECS.md say so.

app/build.gradle

@@ -34,8 +34,8 @@ android {
         applicationId "com.stinnesbeck.nilsmg4"
         minSdk 27
         targetSdk 36
-        versionCode 86
+        versionCode 87
-        versionName "2.16.2"
+        versionName "2.16.3"
 
         // 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.

app/src/main/java/com/evsuite/abrp/MainActivity.java

@@ -126,7 +126,7 @@ public class MainActivity extends AppCompatActivity {
     /** Upload page: live telemetry switch and cadence. */
     private SwitchMaterial liveTelemetrySwitch, boostSwitch, voiceKeySwitch, fullScreenSwitch;
     private TextView steeringKeysText;
-    private android.widget.Spinner intervalSpinner;
+    private com.google.android.material.chip.ChipGroup intervalChoices;
     private TextInputLayout lowSocLayout;
     private TextInputEditText lowSocInput;
 
@@ -305,6 +305,26 @@ public class MainActivity extends AppCompatActivity {
                 window.widthPixels, window.heightPixels, config.screenWidthDp, config.screenHeightDp));
     }
 
+    /**
+     * Shows a dialog without bringing the car's bars back. A dialog is a window of its own, and
+     * the system shows the bars when a window without the full-screen flags takes focus. So it
+     * is shown unfocusable, given the activity's flags, and only then allowed focus. None of the
+     * dialogs here take typing, which an unfocusable window would block.
+     */
+    @SuppressWarnings("deprecation") // the WindowInsetsController API starts at 30; this is 28
+    private void showKeepingFullScreen(android.app.Dialog dialog) {
+        android.view.Window window = dialog.getWindow();
+        if (window == null || !UploadSettings.fullScreen(prefs)) {
+            dialog.show();
+            return;
+        }
+        window.setFlags(android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
+                android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
+        dialog.show();
+        window.getDecorView().setSystemUiVisibility(getWindow().getDecorView().getSystemUiVisibility());
+        window.clearFlags(android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
+    }
+
     private static final String STATE_PAGE = "page";
 
     @Override
@@ -332,7 +352,7 @@ public class MainActivity extends AppCompatActivity {
                 .setView(content)
                 .create();
         content.<MaterialButton>findViewById(R.id.about_close).setOnClickListener(v -> dialog.dismiss());
-        dialog.show();
+        showKeepingFullScreen(dialog);
         if (dialog.getWindow() != null) {
             dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
             android.util.DisplayMetrics metrics = getResources().getDisplayMetrics();
@@ -440,7 +460,7 @@ public class MainActivity extends AppCompatActivity {
                 .setView(panel)
                 .setCancelable(false)
                 .create();
-        dialog.show();
+        showKeepingFullScreen(dialog);
         UpdateHook.checkInBackground(this, new UpdateHook.Listener() {
             @Override public void onProgress(int percent) {
                 if (percent < 0) {
@@ -457,11 +477,11 @@ public class MainActivity extends AppCompatActivity {
             @Override public void onResult(String message) {
                 button.setEnabled(true);
                 dialog.dismiss();
-                new MaterialAlertDialogBuilder(MainActivity.this)
+                showKeepingFullScreen(new MaterialAlertDialogBuilder(MainActivity.this)
                         .setTitle(R.string.update_dialog_title)
                         .setMessage(message)
                         .setPositiveButton(android.R.string.ok, null)
-                        .show();
+                        .create());
             }
         });
     }
@@ -796,7 +816,7 @@ public class MainActivity extends AppCompatActivity {
             qr.setVisibility(View.GONE);
             code.setVisibility(View.GONE);
             dialog.setOnDismissListener(d -> cancelled[0] = true);
-            dialog.show();
+            showKeepingFullScreen(dialog);
         }
 
         /** Shows the request: QR code, the code in the sentence and below it. UI thread. */
@@ -1032,7 +1052,7 @@ public class MainActivity extends AppCompatActivity {
             applyFullScreen();
         });
         liveTelemetrySwitch = servicePane.findViewById(R.id.abrp_upload_switch);
-        intervalSpinner = servicePane.findViewById(R.id.interval_spinner);
+        intervalChoices = servicePane.findViewById(R.id.interval_choices);
         boostSwitch = servicePane.findViewById(R.id.boost_switch);
         lowSocInput = servicePane.findViewById(R.id.low_soc_input);
         lowSocLayout = servicePane.findViewById(R.id.low_soc_layout);
@@ -1105,47 +1125,52 @@ public class MainActivity extends AppCompatActivity {
         }, "abrp-test").start();
     }
 
+    /**
+     * A single choice as buttons on the page (choice_chip.xml), in place of a drop-down: a
+     * drop-down opens a window of its own that is not full screen, and the car's bars came back
+     * while it was open. Rebinding replaces the buttons, so it may be called again.
+     */
+    private void bindChoices(com.google.android.material.chip.ChipGroup group, String[] labels, int selected,
+                             java.util.function.IntConsumer onPick) {
+        group.setOnCheckedStateChangeListener(null);
+        group.removeAllViews();
+        for (int i = 0; i < labels.length; i++) {
+            com.google.android.material.chip.Chip chip = (com.google.android.material.chip.Chip)
+                    getLayoutInflater().inflate(R.layout.choice_chip, group, false);
+            chip.setId(View.generateViewId());
+            chip.setText(labels[i]);
+            chip.setTag(i);
+            group.addView(chip);
+            if (i == selected) chip.setChecked(true);
+        }
+        group.setOnCheckedStateChangeListener((g, checkedIds) -> {
+            if (checkedIds.isEmpty()) return;
+            View chosen = g.findViewById(checkedIds.get(0));
+            if (chosen != null) onPick.accept((Integer) chosen.getTag());
+        });
+    }
+
     /** The accent colour; a change recreates the activity so every view takes it. */
     private void bindAccentColor() {
-        android.widget.Spinner spinner = settingsPane.findViewById(R.id.accent_spinner);
         AccentColor[] colors = AccentColor.values();
         String[] labels = new String[colors.length];
         for (int i = 0; i < colors.length; i++) labels[i] = colors[i].label;
-        android.widget.ArrayAdapter<String> adapter = new android.widget.ArrayAdapter<>(
-                this, R.layout.spinner_value, labels);
-        adapter.setDropDownViewResource(R.layout.spinner_dropdown);
-        spinner.setAdapter(adapter);
         AccentColor current = AccentColor.fromPref(prefs.getString(AccentColor.PREF_KEY, null));
-        spinner.setSelection(current.ordinal());
+        bindChoices(settingsPane.findViewById(R.id.accent_choices), labels, current.ordinal(), position -> {
-        spinner.setOnItemSelectedListener(new android.widget.AdapterView.OnItemSelectedListener() {
+            if (colors[position] == current) return;
-            @Override
+            prefs.edit().putString(AccentColor.PREF_KEY, colors[position].name()).apply();
-            public void onItemSelected(android.widget.AdapterView<?> parent, View view, int position, long id) {
+            recreate();
-                if (colors[position] == current) return;
-                prefs.edit().putString(AccentColor.PREF_KEY, colors[position].name()).apply();
-                recreate();
-            }
-            @Override public void onNothingSelected(android.widget.AdapterView<?> parent) { }
         });
     }
 
     /** Tyre pressure unit: display only, read on every refresh of the Overview. */
     private void bindTireUnit() {
-        android.widget.Spinner spinner = settingsPane.findViewById(R.id.tire_unit_spinner);
         PressureUnit[] units = PressureUnit.values();
         String[] labels = new String[units.length];
         for (int i = 0; i < units.length; i++) labels[i] = units[i].label;
-        android.widget.ArrayAdapter<String> adapter = new android.widget.ArrayAdapter<>(
+        int current = PressureUnit.fromPref(prefs.getString(PressureUnit.PREF_KEY, null)).ordinal();
-                this, R.layout.spinner_value, labels);
+        bindChoices(settingsPane.findViewById(R.id.tire_unit_choices), labels, current, position ->
-        adapter.setDropDownViewResource(R.layout.spinner_dropdown);
+                prefs.edit().putString(PressureUnit.PREF_KEY, units[position].name()).apply());
-        spinner.setAdapter(adapter);
-        spinner.setSelection(PressureUnit.fromPref(prefs.getString(PressureUnit.PREF_KEY, null)).ordinal());
-        spinner.setOnItemSelectedListener(new android.widget.AdapterView.OnItemSelectedListener() {
-            @Override
-            public void onItemSelected(android.widget.AdapterView<?> parent, View view, int position, long id) {
-                prefs.edit().putString(PressureUnit.PREF_KEY, units[position].name()).apply();
-            }
-            @Override public void onNothingSelected(android.widget.AdapterView<?> parent) { }
-        });
     }
 
     /** The service reads these settings on every tick, so a change applies without a restart. */
@@ -1161,19 +1186,9 @@ public class MainActivity extends AppCompatActivity {
                     : getResources().getQuantityString(R.plurals.interval_seconds, sec, sec);
             if (sec == current.intervalSec) selected = i;
         }
-        android.widget.ArrayAdapter<String> adapter = new android.widget.ArrayAdapter<>(
+        bindChoices(intervalChoices, labels, selected, position ->
-                this, R.layout.spinner_value, labels);
-        adapter.setDropDownViewResource(R.layout.spinner_dropdown);
-        intervalSpinner.setAdapter(adapter);
-        intervalSpinner.setSelection(selected);
-        intervalSpinner.setOnItemSelectedListener(new android.widget.AdapterView.OnItemSelectedListener() {
-            @Override
-            public void onItemSelected(android.widget.AdapterView<?> parent, View view, int position, long id) {
                 prefs.edit().putInt(UploadSettings.KEY_INTERVAL_SEC,
-                        UploadSettings.INTERVAL_CHOICES_SEC[position]).apply();
+                        UploadSettings.INTERVAL_CHOICES_SEC[position]).apply());
-            }
-            @Override public void onNothingSelected(android.widget.AdapterView<?> parent) { }
-        });
 
         boostSwitch.setOnCheckedChangeListener(null);
         boostSwitch.setChecked(current.boostLowSoc);
@@ -1462,13 +1477,14 @@ public class MainActivity extends AppCompatActivity {
             if (consumptionPeriod != ConsumptionTracker.Period.TRIP_A && consumptionPeriod != ConsumptionTracker.Period.TRIP_B) return;
             String name = getString(consumptionPeriod == ConsumptionTracker.Period.TRIP_A
                     ? R.string.consumption_trip_a : R.string.consumption_trip_b);
-            new MaterialAlertDialogBuilder(this).setTitle(getString(R.string.trip_reset_title, name))
+            showKeepingFullScreen(new MaterialAlertDialogBuilder(this)
+                    .setTitle(getString(R.string.trip_reset_title, name))
                     .setMessage(R.string.trip_reset_message)
                     .setNegativeButton(R.string.pair_cancel, null)
                     .setPositiveButton(R.string.trip_reset_confirm, (d, w) -> {
                         consumptionTracker.reset(consumptionPeriod);
                         refreshConsumption();
-                    }).show();
+                    }).create());
         });
     }
 
@@ -1671,7 +1687,7 @@ public class MainActivity extends AppCompatActivity {
         dialog.getDatePicker().setMaxDate(System.currentTimeMillis());
         dialog.getDatePicker().setMinDate(java.time.LocalDate.now().minusMonths(4)
                 .atStartOfDay(zone).toInstant().toEpochMilli());
-        dialog.show();
+        showKeepingFullScreen(dialog);
     }
 
     /**

app/src/main/res/color/choice_background.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_checked="true" android:color="?attr/evAccentSurface" />
+    <item android:color="@color/ev_surface_raised" />
+</selector>

app/src/main/res/color/choice_stroke.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_checked="true" android:color="?attr/evAccent" />
+    <item android:color="@color/ev_outline" />
+</selector>

app/src/main/res/color/choice_text.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_checked="true" android:color="?attr/evAccent" />
+    <item android:color="@color/ev_text_primary" />
+</selector>

app/src/main/res/layout-w1000dp/pane_service.xml

@@ -27,7 +27,7 @@
             <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" 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" />
                 <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_frequency" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
-                <Spinner android:id="@+id/interval_spinner" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:layout_marginTop="12dp" android:background="@drawable/bg_input_panel" android:popupBackground="@color/ev_surface_raised" android:contentDescription="@string/label_frequency" android:spinnerMode="dropdown" />
+                <com.google.android.material.chip.ChipGroup android:id="@+id/interval_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" app:singleSelection="true" app:selectionRequired="true" app:chipSpacingHorizontal="12dp" app:chipSpacingVertical="8dp" />
                 <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_frequency" android:textAppearance="@style/Text.EV.Secondary" android:layout_marginTop="12dp" />
                 <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/boost_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_boost_low_soc" 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" />
                 <com.google.android.material.textfield.TextInputLayout android:id="@+id/low_soc_layout" style="@style/Widget.EV.Input" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" android:hint="@string/label_low_soc_threshold">

app/src/main/res/layout-w1000dp/pane_settings.xml

@@ -9,9 +9,9 @@
                 <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" />
                 <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_tire_unit" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
-                <Spinner android:id="@+id/tire_unit_spinner" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:layout_marginTop="12dp" android:background="@drawable/bg_input_panel" android:popupBackground="@color/ev_surface_raised" android:contentDescription="@string/label_tire_unit" android:spinnerMode="dropdown" />
+                <com.google.android.material.chip.ChipGroup android:id="@+id/tire_unit_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" app:singleSelection="true" app:selectionRequired="true" app:chipSpacingHorizontal="12dp" app:chipSpacingVertical="8dp" />
                 <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_accent" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
-                <Spinner android:id="@+id/accent_spinner" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:layout_marginTop="12dp" android:background="@drawable/bg_input_panel" android:popupBackground="@color/ev_surface_raised" android:contentDescription="@string/label_accent" android:spinnerMode="dropdown" />
+                <com.google.android.material.chip.ChipGroup android:id="@+id/accent_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" app:singleSelection="true" app:selectionRequired="true" app:chipSpacingHorizontal="12dp" app:chipSpacingVertical="8dp" />
             </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">
                 <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/design_battery_settings_title" android:textAppearance="@style/Text.EV.Eyebrow" />

app/src/main/res/layout/choice_chip.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- One option of an on-page choice (MainActivity.bindChoices). Chips rather than a drop-down:
+     a drop-down opens its own window, which is not full screen, so the car's bars came back
+     while it was open; and one tap is easier than two while driving. -->
+<com.google.android.material.chip.Chip xmlns:android="http://schemas.android.com/apk/res/android"
+    style="@style/Widget.EV.Choice"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content" />

app/src/main/res/layout/pane_service.xml

@@ -24,7 +24,7 @@
         <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">
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/design_service_timing" android:textAppearance="@style/Text.EV.Eyebrow" />
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_frequency" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
-            <Spinner android:id="@+id/interval_spinner" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:layout_marginTop="12dp" android:background="@drawable/bg_input_panel" android:popupBackground="@color/ev_surface_raised" android:contentDescription="@string/label_frequency" android:spinnerMode="dropdown" />
+            <com.google.android.material.chip.ChipGroup android:id="@+id/interval_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" app:singleSelection="true" app:selectionRequired="true" app:chipSpacingHorizontal="12dp" app:chipSpacingVertical="8dp" />
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_frequency" android:textAppearance="@style/Text.EV.Secondary" android:layout_marginTop="12dp" />
             <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/boost_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_boost_low_soc" 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" />
             <com.google.android.material.textfield.TextInputLayout android:id="@+id/low_soc_layout" style="@style/Widget.EV.Input" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" android:hint="@string/label_low_soc_threshold">

app/src/main/res/layout/pane_settings.xml

@@ -8,9 +8,9 @@
             <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" />
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_tire_unit" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
-            <Spinner android:id="@+id/tire_unit_spinner" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:layout_marginTop="12dp" android:background="@drawable/bg_input_panel" android:popupBackground="@color/ev_surface_raised" android:contentDescription="@string/label_tire_unit" android:spinnerMode="dropdown" />
+            <com.google.android.material.chip.ChipGroup android:id="@+id/tire_unit_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" app:singleSelection="true" app:selectionRequired="true" app:chipSpacingHorizontal="12dp" app:chipSpacingVertical="8dp" />
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_accent" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
-            <Spinner android:id="@+id/accent_spinner" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:layout_marginTop="12dp" android:background="@drawable/bg_input_panel" android:popupBackground="@color/ev_surface_raised" android:contentDescription="@string/label_accent" android:spinnerMode="dropdown" />
+            <com.google.android.material.chip.ChipGroup android:id="@+id/accent_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" app:singleSelection="true" app:selectionRequired="true" app:chipSpacingHorizontal="12dp" app:chipSpacingVertical="8dp" />
         </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">
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/design_battery_settings_title" android:textAppearance="@style/Text.EV.Eyebrow" />

app/src/main/res/layout/spinner_dropdown.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<TextView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent" android:layout_height="wrap_content"
-    android:minHeight="72dp" android:gravity="center_vertical"
-    android:paddingStart="20dp" android:paddingEnd="20dp"
-    android:paddingTop="12dp" android:paddingBottom="12dp"
-    android:background="?attr/selectableItemBackground"
-    android:textAppearance="@style/Text.EV.Body" />

app/src/main/res/layout/spinner_value.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<TextView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent" android:layout_height="wrap_content"
-    android:minHeight="72dp" android:gravity="center_vertical"
-    android:paddingStart="20dp" android:paddingEnd="20dp"
-    android:paddingTop="12dp" android:paddingBottom="12dp"
-    android:drawableEnd="@drawable/ic_chevron_down" android:drawablePadding="16dp"
-    android:textAppearance="@style/Text.EV.Body" />

app/src/main/res/values/styles_ev.xml

@@ -96,4 +96,20 @@
     <style name="ShapeAppearanceOverlay.EV.Button" parent="">
         <item name="cornerSize">18dp</item>
     </style>
+
+    <!-- On-page single choice (choice_chip.xml): a full touch target, the accent when chosen. -->
+    <style name="Widget.EV.Choice" parent="Widget.Material3.Chip.Filter">
+        <item name="android:checkable">true</item>
+        <item name="checkedIconVisible">false</item>
+        <item name="chipMinHeight">@dimen/touch_target</item>
+        <item name="chipMinTouchTargetSize">@dimen/touch_target</item>
+        <item name="android:textSize">@dimen/text_body</item>
+        <item name="android:textColor">@color/choice_text</item>
+        <item name="chipBackgroundColor">@color/choice_background</item>
+        <item name="chipStrokeColor">@color/choice_stroke</item>
+        <item name="chipStrokeWidth">1dp</item>
+        <item name="chipStartPadding">16dp</item>
+        <item name="chipEndPadding">16dp</item>
+        <item name="ensureMinTouchTargetSize">false</item>
+    </style>
 </resources>