Correct theme applied to swappable apps list.

Took a while to figure out, but the problem was that the support
libraries ListFragment would only ever use getActivity() when
creating widgets. What we really needed was the ability to use
an alternative context, namely a ContextThemeWrapper. If this is
passed to the constructor of a widget, it is themed appropriately.

To make it work, we now create our own list view in onCreateView()
(which is really a copy of the code from the android list_content.xml
file anyway). There are also some workarounds for a bug in the
support library with regards to using your own view.

res/layout/swap_create.xml

@@ -1,19 +1,66 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<RelativeLayout
-        xmlns:android="http://schemas.android.com/apk/res/android"
-        android:orientation="vertical"
+<!--
+Ported from the android-19 source. This was necessary so that we could inflate
+the view ourself (and hence theme it), but also get references to the relevant
+widgets (e.g. empty text view, progress bar, list). The list_content view we
+ported this from uses hidden/internal id's that we don't get the privilege of
+using. In the process, we also:
+ * Added tools: attributes.
+ * Changed the names of an id or two so that I can reference them from Java.
+-->
+
+<!--
+/* Copyright 2010, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:background="@android:color/white"
-        xmlns:tools="http://schemas.android.com/tools" tools:context=".views.swap.SwapActivity">
+        xmlns:tools="http://schemas.android.com/tools"
+        tools:context=".views.swap.SwapActivity">
 
-    <ListView
-            android:id="@android:id/list"
-            android:layout_height="match_parent"
+    <LinearLayout android:id="@+id/progressContainer"
+            android:orientation="vertical"
             android:layout_width="match_parent"
-            tools:listitem="@layout/applistitem"
-            tools:listheader="@layout/swap_create_header"
-            />
+            android:layout_height="match_parent"
+            android:visibility="gone"
+            android:gravity="center">
 
-</RelativeLayout>
+        <ProgressBar style="?android:attr/progressBarStyleLarge"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:id="@android:id/progress"/>
+
+    </LinearLayout>
+
+    <FrameLayout android:id="@+id/listContainer"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+        <ListView android:id="@android:id/list"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:drawSelectorOnTop="false"
+                tools:listitem="@layout/applistitem"
+                tools:listheader="@layout/swap_create_header" />
+        <TextView android:id="@android:id/empty"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:gravity="center"
+                android:textAppearance="?android:attr/textAppearanceLarge" />
+    </FrameLayout>
+
+</FrameLayout>

res/values/styles.xml

@@ -40,10 +40,12 @@
     </style>
 
     <style name="SwapTheme.AppList" parent="AppThemeLightWithDarkActionBar">
-        <item name="android:windowBackground">@color/white</item>
         <item name="android:background">@color/white</item>
     </style>
 
+    <style name="SwapTheme.AppList.ListItem" parent="AppThemeLightWithDarkActionBar">
+    </style>
+
     <style name="SwapTheme.AppList.StartButton">
         <item name="android:layout_marginLeft">9dp</item> <!-- 16px * 96dpi / 160dpi -->
         <item name="android:layout_marginRight">9dp</item> <!-- 16px * 96dpi / 160dpi -->

src/org/fdroid/fdroid/views/swap/SelectAppsFragment.java

@@ -75,15 +75,27 @@ public class SelectAppsFragment extends ListFragment
         return false;
     }
 
+    /**
+     * Normally we'd just let the baseclass ListFrament.onCreateView() from the support library do its magic.
+     * However, it doesn't allow us to theme it. That is, it always passes getActivity() into the constructor
+     * of widgets. We are more interested in a ContextThemeWrapper, so that the widgets get appropriately
+     * themed. In order to get it working, we need to work around android bug 21742 as well
+     * (https://code.google.com/p/android/issues/detail?id=21742).
+     */
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 
         LayoutInflater themedInflater = (LayoutInflater)new ContextThemeWrapper(inflater.getContext(), R.style.SwapTheme_AppList).getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 
-        View view = super.onCreateView(themedInflater, container, savedInstanceState);
+        View view = themedInflater.inflate(R.layout.swap_create, container, false);
         ListView listView = (ListView)view.findViewById(android.R.id.list);
         listView.addHeaderView(themedInflater.inflate(R.layout.swap_create_header, null, false));
 
+        // Workaround for https://code.google.com/p/android/issues/detail?id=21742
+        view.findViewById(android.R.id.empty).setId(0x00ff0001);
+        view.findViewById(R.id.progressContainer).setId(0x00ff0002);
+        view.findViewById(android.R.id.progress).setId(0x00ff0003);
+
         return view;
     }
 
@@ -98,7 +110,8 @@ public class SelectAppsFragment extends ListFragment
 
         ListView listView = getListView();
         listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
-        SimpleCursorAdapter adapter = new SimpleCursorAdapter(getActivity(),
+        SimpleCursorAdapter adapter = new SimpleCursorAdapter(
+                new ContextThemeWrapper(getActivity(), R.style.SwapTheme_AppList_ListItem),
                 R.layout.select_local_apps_list_item,
                 null,
                 new String[] {