diff --git a/packages/DocumentsUI/src/com/android/documentsui/Metrics.java b/packages/DocumentsUI/src/com/android/documentsui/Metrics.java
index e6b22e6ed73f4..7ad4a094b3274 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/Metrics.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/Metrics.java
@@ -30,6 +30,7 @@ import android.net.Uri;
 import android.provider.DocumentsContract;
 import android.util.Log;
 
+import com.android.documentsui.State.ActionType;
 import com.android.documentsui.model.DocumentInfo;
 import com.android.documentsui.model.RootInfo;
 import com.android.documentsui.services.FileOperationService;
@@ -502,7 +503,7 @@ public final class Metrics {
      * @param name The name of the histogram.
      * @param bucket The bucket to increment.
      */
-    private static void logHistogram(Context context, String name, int bucket) {
+    private static void logHistogram(Context context, String name, @ActionType int bucket) {
         if (DEBUG) Log.d(TAG, name + ": " + bucket);
         MetricsLogger.histogram(context, name, bucket);
     }
diff --git a/packages/DocumentsUI/src/com/android/documentsui/RootsFragment.java b/packages/DocumentsUI/src/com/android/documentsui/RootsFragment.java
index 35da8cc6357b8..8b4f40ef38bea 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/RootsFragment.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/RootsFragment.java
@@ -17,6 +17,7 @@
 package com.android.documentsui;
 
 import static com.android.documentsui.Shared.DEBUG;
+import static com.android.documentsui.State.ACTION_OPEN_TREE;
 
 import android.app.Fragment;
 import android.app.FragmentManager;
@@ -117,7 +118,7 @@ public class RootsFragment extends Fragment {
 
                 Intent handlerAppIntent = getArguments().getParcelable(EXTRA_INCLUDE_APPS);
 
-                mAdapter = new RootsAdapter(context, result, handlerAppIntent);
+                mAdapter = new RootsAdapter(context, result, handlerAppIntent, state);
                 mList.setAdapter(mAdapter);
 
                 onCurrentRootChanged();
@@ -308,8 +309,8 @@ public class RootsFragment extends Fragment {
          * @param handlerAppIntent When not null, apps capable of handling the original
          *     intent will be included in list of roots (in special section at bottom).
          */
-        public RootsAdapter(
-                Context context, Collection<RootInfo> roots, @Nullable Intent handlerAppIntent) {
+        public RootsAdapter(Context context, Collection<RootInfo> roots,
+                @Nullable Intent handlerAppIntent, State state) {
             super(context, 0);
 
             final List<RootItem> libraries = new ArrayList<>();
@@ -320,7 +321,8 @@ public class RootsFragment extends Fragment {
 
                 if (root.isHome() && Shared.isHomeRootHidden(context)) {
                     continue;
-                } else if (root.isAdvanced() && Shared.areAdvancedRootsHidden(context)) {
+                } else if (root.isAdvanced()
+                        && Shared.areAdvancedRootsHidden(context, state)) {
                     continue;
                 } else if (root.isLibrary()) {
                     if (DEBUG) Log.d(TAG, "Adding " + root + " as library.");
diff --git a/packages/DocumentsUI/src/com/android/documentsui/Shared.java b/packages/DocumentsUI/src/com/android/documentsui/Shared.java
index d21afee93434d..655359a70c241 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/Shared.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/Shared.java
@@ -22,6 +22,11 @@ import android.text.TextUtils;
 import android.text.format.DateUtils;
 import android.text.format.Time;
 import android.view.WindowManager;
+
+import com.android.documentsui.State.ActionType;
+
+import static com.android.documentsui.State.ACTION_OPEN_TREE;
+
 import android.app.AlertDialog;
 
 import java.text.Collator;
@@ -179,8 +184,9 @@ public final class Shared {
     /*
      * Indicates if the advanced roots should be hidden.
      */
-    public static boolean areAdvancedRootsHidden(Context context) {
-        return context.getResources().getBoolean(R.bool.advanced_roots_hidden);
+    public static boolean areAdvancedRootsHidden(Context context, State state) {
+        return context.getResources().getBoolean(R.bool.advanced_roots_hidden)
+                && state.action != ACTION_OPEN_TREE;
     }
 
 }
diff --git a/packages/DocumentsUI/src/com/android/documentsui/State.java b/packages/DocumentsUI/src/com/android/documentsui/State.java
index 16b7660e8ba45..534a483474d30 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/State.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/State.java
@@ -43,10 +43,19 @@ public class State implements android.os.Parcelable {
 
     private static final String TAG = "State";
 
+    @IntDef(flag = true, value = {
+            ACTION_BROWSE,
+            ACTION_PICK_COPY_DESTINATION,
+            ACTION_OPEN,
+            ACTION_CREATE,
+            ACTION_GET_CONTENT,
+            ACTION_OPEN_TREE
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface ActionType {}
     // File manager and related private picking activity.
     public static final int ACTION_BROWSE = 1;
     public static final int ACTION_PICK_COPY_DESTINATION = 2;
-
     // All public picking activities
     public static final int ACTION_OPEN = 3;
     public static final int ACTION_CREATE = 4;
@@ -69,7 +78,7 @@ public class State implements android.os.Parcelable {
     public static final int SORT_ORDER_LAST_MODIFIED = 2;
     public static final int SORT_ORDER_SIZE = 3;
 
-    public int action;
+    public @ActionType int action;
     public String[] acceptMimes;
 
     /** Derived from local preferences */