diff --git a/src/com/android/launcher3/BaseActivity.java b/src/com/android/launcher3/BaseActivity.java
index e71391f..855983f 100644
--- a/src/com/android/launcher3/BaseActivity.java
+++ b/src/com/android/launcher3/BaseActivity.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3;
 
+import static com.android.launcher3.util.FlagDebugUtils.appendFlag;
+import static com.android.launcher3.util.FlagDebugUtils.formatFlagChange;
 import static com.android.launcher3.util.SystemUiController.UI_STATE_FULLSCREEN_TASK;
 
 import static java.lang.annotation.RetentionPolicy.SOURCE;
@@ -26,6 +28,7 @@
 import android.content.Intent;
 import android.content.res.Configuration;
 import android.os.Bundle;
+import android.util.Log;
 import android.window.OnBackInvokedDispatcher;
 
 import androidx.annotation.IntDef;
@@ -43,6 +46,7 @@
 import java.lang.annotation.Retention;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.StringJoiner;
 
 /**
  * Launcher BaseActivity
@@ -50,6 +54,7 @@
 public abstract class BaseActivity extends Activity implements ActivityContext {
 
     private static final String TAG = "BaseActivity";
+    static final boolean DEBUG = false;
 
     public static final int INVISIBLE_BY_STATE_HANDLER = 1 << 0;
     public static final int INVISIBLE_BY_APP_TRANSITIONS = 1 << 1;
@@ -72,7 +77,8 @@
             flag = true,
             value = {INVISIBLE_BY_STATE_HANDLER, INVISIBLE_BY_APP_TRANSITIONS,
                     INVISIBLE_BY_PENDING_FLAGS, PENDING_INVISIBLE_BY_WALLPAPER_ANIMATION})
-    public @interface InvisibilityFlags{}
+    public @interface InvisibilityFlags {
+    }
 
     private final ArrayList<OnDeviceProfileChangeListener> mDPChangeListeners = new ArrayList<>();
     private final ArrayList<MultiWindowModeChangedListener> mMultiWindowModeChangedListeners =
@@ -97,6 +103,7 @@
     /**
      * State flag indicating if the user is active or the activity when to background as a result
      * of user action.
+     *
      * @see #isUserActive()
      */
     public static final int ACTIVITY_STATE_USER_ACTIVE = 1 << 4;
@@ -120,14 +127,28 @@
                     ACTIVITY_STATE_WINDOW_FOCUSED,
                     ACTIVITY_STATE_USER_ACTIVE,
                     ACTIVITY_STATE_TRANSITION_ACTIVE})
-    public @interface ActivityFlags{}
+    public @interface ActivityFlags {
+    }
+
+    /** Returns a human-readable string for the specified {@link ActivityFlags}. */
+    public static String getActivityStateString(@ActivityFlags int flags) {
+        StringJoiner result = new StringJoiner("|");
+        appendFlag(result, flags, ACTIVITY_STATE_STARTED, "state_started");
+        appendFlag(result, flags, ACTIVITY_STATE_RESUMED, "state_resumed");
+        appendFlag(result, flags, ACTIVITY_STATE_DEFERRED_RESUMED, "state_deferred_resumed");
+        appendFlag(result, flags, ACTIVITY_STATE_WINDOW_FOCUSED, "state_window_focused");
+        appendFlag(result, flags, ACTIVITY_STATE_USER_ACTIVE, "state_user_active");
+        appendFlag(result, flags, ACTIVITY_STATE_TRANSITION_ACTIVE, "state_transition_active");
+        return result.toString();
+    }
 
     @ActivityFlags
     private int mActivityFlags;
 
     // When the recents animation is running, the visibility of the Launcher is managed by the
     // animation
-    @InvisibilityFlags private int mForceInvisible;
+    @InvisibilityFlags
+    private int mForceInvisible;
 
     private final ViewCache mViewCache = new ViewCache();
 
@@ -284,17 +305,29 @@
         return mActivityFlags;
     }
 
-    protected void addActivityFlags(int flags) {
-        mActivityFlags |= flags;
-        onActivityFlagsChanged(flags);
+    protected void addActivityFlags(int toAdd) {
+        final int oldFlags = mActivityFlags;
+        mActivityFlags |= toAdd;
+        if (DEBUG) {
+            Log.d(TAG, "Launcher flags updated: " + formatFlagChange(mActivityFlags, oldFlags,
+                    BaseActivity::getActivityStateString));
+        }
+        onActivityFlagsChanged(toAdd);
     }
 
-    protected void removeActivityFlags(int flags) {
-        mActivityFlags &= ~flags;
-        onActivityFlagsChanged(flags);
+    protected void removeActivityFlags(int toRemove) {
+        final int oldFlags = mActivityFlags;
+        mActivityFlags &= ~toRemove;
+        if (DEBUG) {
+            Log.d(TAG, "Launcher flags updated: " + formatFlagChange(mActivityFlags, oldFlags,
+                    BaseActivity::getActivityStateString));
+        }
+
+        onActivityFlagsChanged(toRemove);
     }
 
-    protected void onActivityFlagsChanged(int changeBits) { }
+    protected void onActivityFlagsChanged(int changeBits) {
+    }
 
     public void addMultiWindowModeChangedListener(MultiWindowModeChangedListener listener) {
         mMultiWindowModeChangedListeners.add(listener);
@@ -307,6 +340,7 @@
     /**
      * Used to set the override visibility state, used only to handle the transition home with the
      * recents animation.
+     *
      * @see QuickstepTransitionManager#createWallpaperOpenRunner
      */
     public void addForceInvisibleFlag(@InvisibilityFlags int flag) {
@@ -337,7 +371,7 @@
                 + getDeviceProfile().isVerticalBarLayout());
         writer.println(prefix + "orientation=" + getResources().getConfiguration().orientation);
         writer.println(prefix + "mSystemUiController: " + mSystemUiController);
-        writer.println(prefix + "mActivityFlags: " + mActivityFlags);
+        writer.println(prefix + "mActivityFlags: " + getActivityStateString(mActivityFlags));
         writer.println(prefix + "mForceInvisible: " + mForceInvisible);
     }
 
diff --git a/src/com/android/launcher3/util/FlagDebugUtils.kt b/src/com/android/launcher3/util/FlagDebugUtils.kt
new file mode 100644
index 0000000..f281943
--- /dev/null
+++ b/src/com/android/launcher3/util/FlagDebugUtils.kt
@@ -0,0 +1,37 @@
+package com.android.launcher3.util
+
+import java.util.StringJoiner
+import java.util.function.IntFunction
+
+object FlagDebugUtils {
+
+    /** Appends the [flagName] to [str] when the [flag] is set in [flags]. */
+    @JvmStatic
+    fun appendFlag(str: StringJoiner, flags: Int, flag: Int, flagName: String) {
+        if (flags and flag != 0) {
+            str.add(flagName)
+        }
+    }
+
+    /**
+     * Produces a human-readable representation of the [current] flags, followed by a diff from from
+     * [previous].
+     *
+     * The resulting string is intented for logging and debugging.
+     */
+    @JvmStatic
+    fun formatFlagChange(current: Int, previous: Int, flagSerializer: IntFunction<String>): String {
+        val result = StringJoiner(" ")
+        result.add("[" + flagSerializer.apply(current) + "]")
+        val changed = current xor previous
+        val added = current and changed
+        if (added != 0) {
+            result.add("+[" + flagSerializer.apply(added) + "]")
+        }
+        val removed = previous and changed
+        if (removed != 0) {
+            result.add("-[" + flagSerializer.apply(removed) + "]")
+        }
+        return result.toString()
+    }
+}