feat(ui/sim): change SIM icon colors in dark mode

res/values-v31/arrays.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Taken from frameworks/base/core/res/res/values/arrays.xml -->
+    <array name="sim_colors">
+        <item>@color/Teal_700</item>
+        <item>@color/Blue_700</item>
+        <item>@color/Indigo_700</item>
+        <item>@color/Purple_700</item>
+        <item>@color/Pink_700</item>
+        <item>@color/Red_700</item>
+        <!-- Legacy (Android Q) color palette still exists in Android OS, but starting from
+             Android S, there's a new color palette available in SIM rename dialog. -->
+        <item>@color/SIM_color_cyan</item>
+        <item>@color/SIM_color_blue</item>
+        <item>@color/SIM_color_green</item>
+        <item>@color/SIM_color_purple</item>
+        <item>@color/SIM_color_pink</item>
+        <item>@color/SIM_color_orange</item>
+    </array>
+
+    <array name="sim_dark_mode_colors">
+        <item>@color/Teal_300</item>
+        <item>@color/Blue_300</item>
+        <item>@color/Indigo_300</item>
+        <item>@color/Purple_300</item>
+        <item>@color/Pink_300</item>
+        <item>@color/Red_300</item>
+        <item>@color/SIM_dark_mode_color_cyan</item>
+        <item>@color/SIM_dark_mode_color_blue</item>
+        <item>@color/SIM_dark_mode_color_green</item>
+        <item>@color/SIM_dark_mode_color_purple</item>
+        <item>@color/SIM_dark_mode_color_pink</item>
+        <item>@color/SIM_dark_mode_color_orange</item>
+    </array>
+</resources>

res/values-v31/colors.xml

@@ -7,4 +7,19 @@
     <color name="schedule_card_day_selected_background_color">@android:color/system_neutral2_600</color>
     <color name="schedule_card_day_selected_text_color">@android:color/system_neutral2_50</color>
     <color name="schedule_card_hairline_color">@android:color/transparent</color>
+
+    <!-- Multi-sim sim colors. Keep in sync with frameworks/base/core/res/res/values/colors.xml
+         DO NOT CHANGE HERE! Create a "colors.xml" per SDK when need to sync! -->
+    <color name="SIM_color_cyan">#ff006D74</color><!-- Material Custom Cyan -->
+    <color name="SIM_dark_mode_color_cyan">#ff4DD0E1</color><!-- Material Cyan 300 -->
+    <color name="SIM_color_blue">#ff185ABC</color><!-- Material Blue 800 -->
+    <color name="SIM_dark_mode_color_blue">#ff8AB4F8</color><!-- Material Blue 300 -->
+    <color name="SIM_color_green">#ff137333</color><!-- Material Green 800 -->
+    <color name="SIM_dark_mode_color_green">#ff81C995</color><!-- Material Green 300 -->
+    <color name="SIM_color_purple">#ff7627bb</color><!-- Material Purple 800 -->
+    <color name="SIM_dark_mode_color_purple">#ffC58AF9</color><!-- Material Purple 300 -->
+    <color name="SIM_color_pink">#ffb80672</color><!-- Material Pink 800 -->
+    <color name="SIM_dark_mode_color_pink">#ffff8bcb</color><!-- Material Pink 300 -->
+    <color name="SIM_color_orange">#ff995400</color><!-- Material Custom Orange -->
+    <color name="SIM_dark_mode_color_orange">#fffcad70</color><!-- Material Orange 300 -->
 </resources>

res/values-v34/arrays.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Keep in sync with frameworks/base/core/res/res/values/arrays.xml
+         DO NOT CHANGE HERE! Create an "arrays.xml" per SDK when need to sync! -->
+    <array name="sim_colors">
+        <item>@color/SIM_color_cyan</item>
+        <item>@color/SIM_color_blue</item>
+        <item>@color/SIM_color_green</item>
+        <item>@color/SIM_color_purple</item>
+        <item>@color/SIM_color_pink</item>
+        <item>@color/SIM_color_orange</item>
+    </array>
+
+    <array name="sim_dark_mode_colors">
+        <item>@color/SIM_dark_mode_color_cyan</item>
+        <item>@color/SIM_dark_mode_color_blue</item>
+        <item>@color/SIM_dark_mode_color_green</item>
+        <item>@color/SIM_dark_mode_color_purple</item>
+        <item>@color/SIM_dark_mode_color_pink</item>
+        <item>@color/SIM_dark_mode_color_orange</item>
+    </array>
+</resources>

res/values/arrays.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Taken from frameworks/base/core/res/res/values/arrays.xml -->
+    <array name="sim_colors">
+        <item>@color/Teal_700</item>
+        <item>@color/Blue_700</item>
+        <item>@color/Indigo_700</item>
+        <item>@color/Purple_700</item>
+        <item>@color/Pink_700</item>
+        <item>@color/Red_700</item>
+    </array>
+
+    <array name="sim_dark_mode_colors">
+        <item>@color/Teal_300</item>
+        <item>@color/Blue_300</item>
+        <item>@color/Indigo_300</item>
+        <item>@color/Purple_300</item>
+        <item>@color/Pink_300</item>
+        <item>@color/Red_300</item>
+    </array>
+</resources>

res/values/colors.xml

@@ -13,4 +13,18 @@
     <color name="schedule_card_day_unselected_stroke_color">?android:attr/colorControlHighlight</color>
     <color name="schedule_card_arrow_background_color">@android:color/transparent</color>
     <color name="schedule_card_hairline_color">#28000000</color>
+
+    <!-- Multi-sim sim colors. Taken from frameworks/base/core/res/res/values/colors.xml -->
+    <color name="Teal_700">#ff00796b</color>
+    <color name="Teal_300">#ff4db6ac</color>
+    <color name="Blue_700">#ff3367d6</color>
+    <color name="Blue_300">#ff64b5f6</color>
+    <color name="Indigo_700">#ff303f9f</color>
+    <color name="Indigo_300">#ff7986cb</color>
+    <color name="Purple_700">#ff7b1fa2</color>
+    <color name="Purple_300">#ffba68c8</color>
+    <color name="Pink_700">#ffc2185b</color>
+    <color name="Pink_300">#fff06292</color>
+    <color name="Red_700">#ffc53929</color>
+    <color name="Red_300">#ffe57373</color>
 </resources>

src/com/github/iusmac/sevensim/ui/UiUtils.java

@@ -342,6 +342,16 @@ public static boolean isLandscape(final @NonNull Context context) {
             Configuration.ORIENTATION_LANDSCAPE;
     }
 
+    /**
+     * Check whether currently the app is displayed in dark mode or not.
+     *
+     * @param context The {@link Context} to access resources.
+     */
+    public static boolean isDarkMode(final @NonNull Context context) {
+        return (context.getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK)
+            == Configuration.UI_MODE_NIGHT_YES;
+    }
+
     /** Do not initialize. */
     private UiUtils() {}
 }

src/com/github/iusmac/sevensim/ui/sim/SimListFragment.java

@@ -5,6 +5,7 @@
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
+import android.util.SparseIntArray;
 import android.view.View;
 
 import androidx.collection.SparseArrayCompat;
@@ -41,6 +42,7 @@ public final class SimListFragment extends Hilt_SimListFragment {
     @Inject
     Lazy<ApplicationInfo> mApplicationInfoLazy;
 
+    private SparseIntArray mLightDarkSimIconColorPalette;
     private SimListViewModel mViewModel;
 
     private PreferenceCategory mSimPreferenceCategory;
@@ -49,6 +51,14 @@ public final class SimListFragment extends Hilt_SimListFragment {
 
     private BannerMessagePreference mBackgroundRestrictedBanner;
 
+    @Override
+    public void onAttach(final Context context) {
+        super.onAttach(context);
+
+        mLightDarkSimIconColorPalette = UiUtils.isDarkMode(context) ?
+            getLightDarkSimIconColorPalette(context) : new SparseIntArray();
+    }
+
     @Override
     public void onCreatePreferences(final Bundle savedInstanceState, final String rootKey) {
         mViewModel = ((SimListActivity) requireActivity()).getViewModel();
@@ -160,7 +170,9 @@ private void updateSimPreferenceList(
             }
             pref.setOrder(i);
             pref.setIcon(UiUtils.createTintedDrawable(context, R.drawable.ic_sim,
-                        sub.getIconTint()));
+                        // Whenever possible, use the equivalent dark icon color from the color
+                        // palette defined in Android OS, otherwise default to use the light color
+                        mLightDarkSimIconColorPalette.get(sub.getIconTint(), sub.getIconTint())));
             pref.setTitle(sub.getSimName());
             pref.setSummary(simEntry.getNextUpcomingScheduleSummary());
             pref.setChecked(sub.isSimEnabled());
@@ -180,4 +192,15 @@ private void updateSimPreferenceList(
         // Show a placeholder message if no SIM cards
         mNoSimPreference.setVisible(simEntries.isEmpty());
     }
+
+    private static SparseIntArray getLightDarkSimIconColorPalette(final Context context) {
+        final var res = context.getResources();
+        final var lightColorInts = res.getIntArray(R.array.sim_colors);
+        final var darkColorInts = res.getIntArray(R.array.sim_dark_mode_colors);
+        final var palette = new SparseIntArray(lightColorInts.length);
+        for (int i = 0; i < lightColorInts.length; i++) {
+            palette.put(lightColorInts[i], darkColorInts[i]);
+        }
+        return palette;
+    }
 }

tests/test/java/com/github/iusmac/sevensim/scheduler/SubscriptionSchedulerSummaryBuilderTest.java

@@ -38,6 +38,13 @@
 @HiltAndroidTest
 @RunWith(RobolectricTestRunner.class)
 public class SubscriptionSchedulerSummaryBuilderTest extends MockitoHiltAndroidTestBase {
+    // Increase await timeout in CI environments to account for server load, which may increase the
+    // time needed to pick up a new thread
+    private static final Duration DEFAULT_AWAIT_TIMEOUT_DURATION =
+        Duration.ofSeconds(Optional.ofNullable(System.getenv("CI"))
+                .filter((v) -> v.equals("true"))
+                .map((v) -> 5L)
+                .orElse(3L));
     private static final LocalDateTime NOW = LocalDateTime.of(2007, 1, 1, 13, 0);
 
     private final Subscription mSubscription = new Subscription();
@@ -304,7 +311,7 @@ private CharSequence buildNextUpcomingSubscriptionScheduleSummary(
         await()
             .dontCatchUncaughtExceptions()
             .pollInSameThread()
-            .atMost(Duration.ofSeconds(3))
+            .atMost(DEFAULT_AWAIT_TIMEOUT_DURATION)
             .pollInterval(Duration.ofMillis(50))
             .until(future::isDone);
 

tests/test/java/com/github/iusmac/sevensim/ui/UiUtilsTest.java

@@ -379,6 +379,17 @@ public void test_isLandscape_WhenLandscape() {
         assertTrue(UiUtils.isLandscape(mApplicationContext));
     }
 
+    @Test
+    public void test_isDarkMode_WhenLightMode() {
+        assertFalse(UiUtils.isDarkMode(mApplicationContext));
+    }
+
+    @Test
+    @Config(qualifiers = "night")
+    public void test_isDarkMode_WhenDarkMode() {
+        assertTrue(UiUtils.isDarkMode(mApplicationContext));
+    }
+
     private static RecyclerView.Adapter<? extends RecyclerView.ViewHolder>
         buildAdapterWithItemCount(final int itemCount) {
 

tests/test/java/com/github/iusmac/sevensim/ui/sim/SimListActivityTest.kt

@@ -803,6 +803,85 @@ class SimListActivityTest {
             }
         }
 
+        @Test
+        @Config(minSdk = Q)
+        fun `test dark sim color array size matches light sim color array size`() {
+            with(mApplicationContext.getResources()) {
+                val simColorInts = getIntArray(R.array.sim_colors)
+                val simDarkModeColorInts = getIntArray(R.array.sim_dark_mode_colors)
+                assertThat(simDarkModeColorInts.toTypedArray(), arrayWithSize(simColorInts.size))
+            }
+        }
+
+        @Test
+        fun `test sim icon color palette matches system color palette`() {
+            val simColorInts = mApplicationContext.getResources().getIntArray(R.array.sim_colors)
+            assertThat(systemSimColorInts, `is`(simColorInts))
+        }
+
+        @Test
+        @Config(minSdk = Q)
+        fun `test should use dark sim color palette whenever possible`() {
+            shadowOf(mSubscriptionManager).setAvailableSubscriptionInfos(
+                SubscriptionInfoBuilder.newBuilder().apply {
+                    setId(1)
+                    setSimSlotIndex(0)
+                    setDisplayName("SIM 1")
+                    setIconTint(Color.BLUE)
+                }.buildSubscriptionInfo(),
+                SubscriptionInfoBuilder.newBuilder().apply {
+                    setId(2)
+                    setSimSlotIndex(1)
+                    setDisplayName("SIM 2")
+                    setIconTint(systemSimColorInts.first())
+                }.buildSubscriptionInfo(),
+                SubscriptionInfoBuilder.newBuilder().apply {
+                    setId(3)
+                    setSimSlotIndex(2)
+                    setDisplayName("SIM 3")
+                    setIconTint(systemSimColorInts.last())
+                }.buildSubscriptionInfo()
+            )
+            shadowOf(mTelephonyManager).apply {
+                setActiveModemCount(3)
+                setPhoneCount(3)
+            }
+            val captureRoboImages = { ->
+                // Ensure ViewModel finished updating UI
+                waitActivityWorkerThreadUntilIdle()
+                shadowOf(Looper.getMainLooper()).idle()
+                onSimEntryAt(0).captureRoboImage(idleFor = SCROLL_BAR_FADE_DURATION)
+                onSimEntryAt(1).captureRoboImage(idleFor = SCROLL_BAR_FADE_DURATION)
+                onSimEntryAt(2).captureRoboImage(idleFor = SCROLL_BAR_FADE_DURATION)
+            }
+            onActivity {
+                captureRoboImages()
+                // Switch to dark mode (activity will be recreated)
+                RuntimeEnvironment.setQualifiers("+night")
+                captureRoboImages()
+            }
+        }
+
+        private val systemSimColorInts by lazy(LazyThreadSafetyMode.NONE) {
+            with(mApplicationContext) {
+                getResources().run {
+                    // NOTE: since we're compiling against Robolectric's android-all.jar, we can
+                    // statically access its generated internal resource Ids only when the emulated
+                    // Android SDK level matches targetSdk version, otherwise (almost always) we'll
+                    // get a Resources.NotFoundException. Sometimes, the generated resource Id
+                    // exists but getIntArray returns an empty array or even a wrong array due a
+                    // collision with a resource different from our resource
+                    if (getApplicationInfo().targetSdkVersion === Build.VERSION.SDK_INT) {
+                        getIntArray(com.android.internal.R.array.sim_colors)
+                    } else { // silver bullet (slower) via reflection to cover all other cases
+                        val androidInternalR = Class.forName("com.android.internal.R\$array")
+                        val resId = androidInternalR.getField("sim_colors").getInt(null)
+                        getIntArray(resId)
+                    }
+                }
+            }
+        }
+
         @After
         fun tearDown() {
             // Wait for the ViewModel to complete before exiting the test, otherwise the database