Android12+: use user-defined DynamicColors.

src/main/java/de/dennisguse/opentracks/Startup.java

@@ -7,6 +7,8 @@ import android.os.Build;
 import android.os.StrictMode;
 import android.util.Log;
 
+import com.google.android.material.color.DynamicColors;
+
 import java.lang.reflect.Method;
 
 import de.dennisguse.opentracks.settings.PreferencesUtils;
@@ -28,6 +30,11 @@ public class Startup extends Application {
 
         // Include version information into stack traces.
         Log.i(TAG, BuildConfig.APPLICATION_ID + "; BuildType: " + BuildConfig.BUILD_TYPE + "; VersionName: " + BuildConfig.VERSION_NAME + "/" + BuildConfig.VERSION_NAME_FULL + " VersionCode: " + BuildConfig.VERSION_CODE);
+        // In debug builds: show thread and VM warnings.
+        if (BuildConfig.DEBUG) {
+            Log.d(TAG, "Enabling strict mode");
+            StrictMode.enableDefaults();
+        }
 
         PreferencesUtils.initPreferences(this, getResources());
         // Set default values of preferences on first start.
@@ -35,11 +42,8 @@ public class Startup extends Application {
         PreferencesUtils.applyDefaultUnit();
         PreferencesUtils.applyNightMode();
 
-
-        // In debug builds: show thread and VM warnings.
-        if (BuildConfig.DEBUG) {
-            Log.d(TAG, "Enabling strict mode");
-            StrictMode.enableDefaults();
+        if (PreferencesUtils.shouldUseDynamicColors()) {
+            DynamicColors.applyToActivitiesIfAvailable(this);
         }
     }
 

src/main/java/de/dennisguse/opentracks/settings/PreferencesUtils.java

@@ -307,6 +307,11 @@ public class PreferencesUtils {
         return getBoolean(R.string.stats_fullscreen_while_recording_key, DEFAULT);
     }
 
+    public static boolean shouldUseDynamicColors() {
+        final boolean DEFAULT = resources.getBoolean(R.bool.settings_ui_dynamic_colors_default);
+        return getBoolean(R.string.settings_ui_dynamic_colors_key, DEFAULT);
+    }
+
     public static boolean shouldVoiceAnnouncementOnDeviceSpeaker() {
         final boolean DEFAULT = resources.getBoolean(R.bool.voice_on_device_speaker_default);
         return getBoolean(R.string.voice_on_device_speaker_key, DEFAULT);

src/main/java/de/dennisguse/opentracks/settings/UserInterfaceSettingsFragment.java

@@ -2,6 +2,7 @@ package de.dennisguse.opentracks.settings;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.os.Build;
 import android.os.Bundle;
 
 import androidx.fragment.app.DialogFragment;
@@ -34,6 +35,9 @@ public class UserInterfaceSettingsFragment extends PreferenceFragmentCompat {
             return true;
         });
 
+        Preference dynamicColors = findPreference(getString(R.string.settings_ui_dynamic_colors_key));
+        dynamicColors.setEnabled(Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU);
+
         setShowOnMapFormatOptions();
     }
 

src/main/res/values/settings.xml

@@ -271,6 +271,9 @@
     <string name="show_introduction_screen_key" translatable="false">showIntroduction</string>
     <bool name="show_introduction_screen_default">true</bool>
 
+    <string name="settings_ui_dynamic_colors_key" translatable="false">uiDynamicColors</string>
+    <bool name="settings_ui_dynamic_colors_default" translatable="false">false</bool>
+
     <!-- androidx.appcompat.app.AppCompatDelegate.setDefaultNightMode() -->
     <string name="night_mode_key" translatable="false">nightMode</string>
     <string name="night_mode_default" translatable="false">@string/night_mode_system_value</string>

src/main/res/values/strings.xml

@@ -374,6 +374,8 @@ limitations under the License.
     <string name="settings_chart_by_time">By time</string>
     <!-- Settings Recording -->
     <string name="settings_recording_title">Recording</string>
+    <string name="settings_ui_dynamic_colors_title">Dynamic Colors</string>
+    <string name="settings_ui_dynamic_colors_summary">Use user-defined Dynamic Colors (requires Android 12+)</string>
     <string name="settings_recording_customize_layout_title">Customize your recording layout</string>
     <string name="settings_recording_customize_layout_select_columns">Data fields per row</string>
     <string name="settings_recording_show_on_lockscreen_while_recording_title">Show statistics on lockscreen</string>

src/main/res/xml/settings_user_interface.xml

@@ -12,6 +12,12 @@
         android:title="@string/settings_night_mode_title"
         app:useSimpleSummaryProvider="true" />
 
+    <SwitchPreferenceCompat
+        android:defaultValue="@bool/settings_ui_dynamic_colors_default"
+        android:key="@string/settings_ui_dynamic_colors_key"
+        android:summary="@string/settings_ui_dynamic_colors_summary"
+        android:title="@string/settings_ui_dynamic_colors_title" />
+
     <ListPreference
         android:defaultValue="@string/show_on_map_format_ask"
         android:key="@string/show_on_map_format_key"