Fix bug #13813608 Launcher back button does not take you to previous...

... settings after orientation change

- gasp, there were some issues in the way we were tracking if
a search result fragment was opened. Simplified that code.

Change-Id: I7f8efb3a5aab1a275193f7de15ac50ca33bdad16

src/com/android/settings/SettingsActivity.java

@@ -306,7 +306,6 @@ public class SettingsActivity extends Activity
     private SearchView mSearchView;
     private MenuItem mSearchMenuItem;
     private boolean mSearchMenuItemExpanded = false;
-    private boolean mIsShowingSearchResults = false;
     private SearchResultsSummary mSearchResultsFragment;
     private String mSearchQuery;
 
@@ -1257,17 +1256,15 @@ public class SettingsActivity extends Activity
     @Override
     public boolean onMenuItemActionExpand(MenuItem item) {
         if (item.getItemId() == mSearchMenuItem.getItemId()) {
-            if (mSearchResultsFragment == null) {
             switchToSearchResultsFragmentIfNeeded();
         }
-        }
         return true;
     }
 
     @Override
     public boolean onMenuItemActionCollapse(MenuItem item) {
         if (item.getItemId() == mSearchMenuItem.getItemId()) {
-            if (mIsShowingSearchResults) {
+            if (mSearchMenuItemExpanded) {
                 revertToInitialFragment();
             }
         }
@@ -1275,7 +1272,9 @@ public class SettingsActivity extends Activity
     }
 
     private void switchToSearchResultsFragmentIfNeeded() {
-        if (!mIsShowingSearchResults) {
+        if (mSearchResultsFragment != null) {
+            return;
+        }
         Fragment current = getFragmentManager().findFragmentById(R.id.prefs);
         if (current != null && current instanceof SearchResultsSummary) {
             mSearchResultsFragment = (SearchResultsSummary) current;
@@ -1284,8 +1283,7 @@ public class SettingsActivity extends Activity
             mSearchResultsFragment = (SearchResultsSummary) switchToFragment(
                     SearchResultsSummary.class.getName(), null, false, true, title, true);
         }
-            mIsShowingSearchResults = true;
-        }
+        mSearchMenuItemExpanded = true;
     }
 
     public void needToRevertToInitialFragment() {
@@ -1294,10 +1292,10 @@ public class SettingsActivity extends Activity
 
     private void revertToInitialFragment() {
         mNeedToRevertToInitialFragment = false;
-        getFragmentManager().popBackStack(SettingsActivity.BACK_STACK_PREFS,
-                FragmentManager.POP_BACK_STACK_INCLUSIVE);
         mSearchResultsFragment = null;
-        mIsShowingSearchResults = false;
+        mSearchMenuItemExpanded = false;
+        getFragmentManager().popBackStackImmediate(SettingsActivity.BACK_STACK_PREFS,
+                FragmentManager.POP_BACK_STACK_INCLUSIVE);
         mSearchMenuItem.collapseActionView();
     }
 }