Disable auto-drawer opening if intent is creating doc on empty dir.

Bug: 28170000
Change-Id: Ie7e3cb51dee9bc43d04ba15924b1a23359b784be

packages/DocumentsUI/src/com/android/documentsui/RecentsCreateFragment.java

@@ -17,6 +17,7 @@
 package com.android.documentsui;
 
 import static com.android.documentsui.Shared.TAG;
+import static com.android.documentsui.State.ACTION_CREATE;
 
 import android.app.Fragment;
 import android.app.FragmentManager;
@@ -107,8 +108,9 @@ public class RecentsCreateFragment extends Fragment {
                 mAdapter.update(data);
 
                 // When launched into empty recents, show drawer
-                if (mAdapter.isEmpty() && !state.hasLocationChanged() &&
-                        context instanceof DocumentsActivity) {
+                if (mAdapter.isEmpty() && !state.hasLocationChanged()
+                        && state.action != ACTION_CREATE
+                        && context instanceof DocumentsActivity) {
                     ((DocumentsActivity) context).setRootsDrawerOpen(true);
                 }
             }

packages/DocumentsUI/src/com/android/documentsui/dirlist/FragmentTuner.java

@@ -90,6 +90,10 @@ public abstract class FragmentTuner {
      */
     private static final class DocumentsTuner extends FragmentTuner {
 
+        // We use this to keep track of whether a model has been previously loaded or not so we can
+        // open the drawer on empty directories on first launch
+        private boolean mModelPreviousLoaded;
+
         public DocumentsTuner(Context context, State state) {
             super(context, state);
         }
@@ -178,10 +182,12 @@ public abstract class FragmentTuner {
                 showDrawer = true;
             }
 
-            if (showDrawer && !mState.hasInitialLocationChanged() && !isSearch) {
+            if (showDrawer && !mState.hasInitialLocationChanged() && !isSearch
+                    && !mModelPreviousLoaded) {
                 // This noops on layouts without drawer, so no need to guard.
                 ((BaseActivity) mContext).setRootsDrawerOpen(true);
             }
+            mModelPreviousLoaded = true;
         }
 
         @Override