Add the capability to set a pinned header to SettingsPreferenceFragment

- add a FrameLayout into the preference list fragment
- add public void setPinnedHeaderView(View pinnedHeader) and
clearPinnedHeaderView() APIs for adding and clearing the pinned header

Change-Id: I50ba5dd150167e0d49cc54bee1203f46db6d7a66

res/layout/preference_list_fragment.xml

@@ -20,10 +20,15 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:id="@+id/container_material"
       android:orientation="vertical"
-      android:layout_height="match_parent"
       android:layout_width="match_parent"
+      android:layout_height="match_parent"
       android:background="@android:color/transparent">
 
+    <FrameLayout android:id="@+id/pinned_header"
+                 android:layout_width="match_parent"
+                 android:layout_height="wrap_content"
+                 android:visibility="gone" />
+
     <ListView android:id="@android:id/list"
               style="@style/PreferenceFragmentListSinglePane"
               android:layout_width="match_parent"
@@ -59,6 +64,7 @@
                 android:layout_alignParentStart="true"
                 android:text="@*android:string/back_button_label"
                 />
+
         <LinearLayout
                 android:orientation="horizontal"
                 android:layout_width="wrap_content"
@@ -79,6 +85,7 @@
                     android:layout_margin="5dip"
                     android:text="@*android:string/next_button_label"
                     />
+
         </LinearLayout>
 
     </RelativeLayout>

src/com/android/settings/SettingsPreferenceFragment.java

@@ -33,10 +33,12 @@ import android.preference.PreferenceFragment;
 import android.preference.PreferenceGroupAdapter;
 import android.text.TextUtils;
 import android.util.Log;
+import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.ListAdapter;
 import android.widget.ListView;
@@ -77,6 +79,8 @@ public class SettingsPreferenceFragment extends PreferenceFragment implements Di
         }
     };
 
+    private ViewGroup mPinnedHeaderFrameLayout;
+
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
@@ -92,6 +96,24 @@ public class SettingsPreferenceFragment extends PreferenceFragment implements Di
         }
     }
 
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+            Bundle savedInstanceState) {
+        final View root = super.onCreateView(inflater, container, savedInstanceState);
+        mPinnedHeaderFrameLayout = (ViewGroup) root.findViewById(R.id.pinned_header);
+        return root;
+    }
+
+    public void setPinnedHeaderView(View pinnedHeader) {
+        mPinnedHeaderFrameLayout.addView(pinnedHeader);
+        mPinnedHeaderFrameLayout.setVisibility(View.VISIBLE);
+    }
+
+    public void clearPinnedHeaderView() {
+        mPinnedHeaderFrameLayout.removeAllViews();
+        mPinnedHeaderFrameLayout.setVisibility(View.GONE);
+    }
+
     @Override
     public void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);

src/com/android/settings/users/RestrictedProfileSettings.java

@@ -42,10 +42,8 @@ import android.provider.MediaStore;
 import android.provider.ContactsContract.DisplayPhoto;
 import android.support.v4.content.FileProvider;
 import android.text.TextUtils;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
-import android.view.ViewGroup;
 import android.view.WindowManager;
 import android.view.View.OnClickListener;
 import android.widget.AdapterView;
@@ -97,7 +95,7 @@ public class RestrictedProfileSettings extends AppRestrictionsFragment {
         if (mHeaderView == null) {
             mHeaderView = LayoutInflater.from(getActivity()).inflate(
                     R.layout.user_info_header, null);
-            ((ViewGroup) getListView().getParent()).addView(mHeaderView, 0);
+            setPinnedHeaderView(mHeaderView);
             mHeaderView.setOnClickListener(this);
             mUserIconView = (ImageView) mHeaderView.findViewById(android.R.id.icon);
             mUserNameView = (TextView) mHeaderView.findViewById(android.R.id.title);