Merge "Make nav bar color transparent by default if targetSdk >= 35" into main

core/java/com/android/internal/policy/PhoneWindow.java

@@ -40,6 +40,9 @@ import android.annotation.UiContext;
 import android.app.ActivityManager;
 import android.app.KeyguardManager;
 import android.app.SearchManager;
+import android.app.compat.CompatChanges;
+import android.compat.annotation.ChangeId;
+import android.compat.annotation.EnabledSince;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
@@ -123,6 +126,7 @@ import com.android.internal.view.menu.MenuHelper;
 import com.android.internal.view.menu.MenuPresenter;
 import com.android.internal.view.menu.MenuView;
 import com.android.internal.widget.DecorContentParent;
+import com.android.window.flags.Flags;
 
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
@@ -162,6 +166,14 @@ public class PhoneWindow extends Window implements MenuBuilder.Callback {
 
     private final static int DEFAULT_BACKGROUND_FADE_DURATION_MS = 300;
 
+    /**
+     * Makes navigation bar color transparent by default if the target SDK is
+     * {@link Build.VERSION_CODES#VANILLA_ICE_CREAM} or above.
+     */
+    @ChangeId
+    @EnabledSince(targetSdkVersion = Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    private static final long NAV_BAR_COLOR_DEFAULT_TRANSPARENT = 232195501L;
+
     private static final int CUSTOM_TITLE_COMPATIBLE_FEATURES = DEFAULT_FEATURES |
             (1 << FEATURE_CUSTOM_TITLE) |
             (1 << FEATURE_CONTENT_TRANSITIONS) |
@@ -2525,6 +2537,8 @@ public class PhoneWindow extends Window implements MenuBuilder.Callback {
 
             mNavigationBarColor =
                     navBarColor == navBarDefaultColor
+                            && !(CompatChanges.isChangeEnabled(NAV_BAR_COLOR_DEFAULT_TRANSPARENT)
+                                    && Flags.navBarTransparentByDefault())
                             && !context.getResources().getBoolean(
                                     R.bool.config_navBarDefaultTransparent)
                     ? navBarCompatibleColor