Merge change 26415 into eclair

* changes:
  Add support for thumbnails to WallpaperInfo.

api/current.xml

@@ -8259,6 +8259,17 @@
  visibility="public"
 >
 </field>
+<field name="thumbnail"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="16843429"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 <field name="tileMode"
  type="int"
  transient="false"

core/java/android/app/WallpaperInfo.java

@@ -39,6 +39,11 @@ public final class WallpaperInfo implements Parcelable {
      */
     final String mSettingsActivityName;
 
+    /**
+     * Resource identifier for this wallpaper's thumbnail image.
+     */
+    final int mThumbnailResource;
+
     /**
      * Constructor.
      * 
@@ -53,6 +58,7 @@ public final class WallpaperInfo implements Parcelable {
         
         PackageManager pm = context.getPackageManager();
         String settingsActivityComponent = null;
+        int thumbnailRes = -1;
         
         XmlResourceParser parser = null;
         try {
@@ -79,16 +85,23 @@ public final class WallpaperInfo implements Parcelable {
                     com.android.internal.R.styleable.Wallpaper);
             settingsActivityComponent = sa.getString(
                     com.android.internal.R.styleable.Wallpaper_settingsActivity);
+            
+            thumbnailRes = sa.getResourceId(
+                    com.android.internal.R.styleable.Wallpaper_thumbnail,
+                    -1);
+
             sa.recycle();
         } finally {
             if (parser != null) parser.close();
         }
         
         mSettingsActivityName = settingsActivityComponent;
+        mThumbnailResource = thumbnailRes;
     }
 
     WallpaperInfo(Parcel source) {
         mSettingsActivityName = source.readString();
+        mThumbnailResource = source.readInt();
         mService = ResolveInfo.CREATOR.createFromParcel(source);
     }
     
@@ -143,6 +156,20 @@ public final class WallpaperInfo implements Parcelable {
         return mService.loadIcon(pm);
     }
     
+    /**
+     * Load the thumbnail image for this wallpaper.
+     * 
+     * @param pm Supply a PackageManager used to load the wallpaper's
+     * resources.
+     */
+    public Drawable loadThumbnail(PackageManager pm) {
+        if (mThumbnailResource < 0) return null;
+
+        return pm.getDrawable(mService.serviceInfo.packageName,
+                              mThumbnailResource,
+                              null);
+    }
+    
     /**
      * Return the class name of an activity that provides a settings UI for
      * the wallpaper.  You can launch this activity be starting it with
@@ -178,6 +205,7 @@ public final class WallpaperInfo implements Parcelable {
      */
     public void writeToParcel(Parcel dest, int flags) {
         dest.writeString(mSettingsActivityName);
+        dest.writeInt(mThumbnailResource);
         mService.writeToParcel(dest, flags);
     }
 

core/res/res/values/attrs.xml

@@ -3451,6 +3451,9 @@
         <!-- Component name of an activity that allows the user to modify
              the current settings for this wallpaper. -->
         <attr name="settingsActivity" />
+
+        <!-- Reference to a the wallpaper's thumbnail bitmap. -->
+        <attr name="thumbnail" format="reference" />
     </declare-styleable>
 
     <!-- =============================== -->

core/res/res/values/public.xml

@@ -1169,6 +1169,7 @@
   <public type="attr" name="summaryColumn" />
   <public type="attr" name="detailColumn" />
   <public type="attr" name="detailSocialSummary" />
+  <public type="attr" name="thumbnail" />
 
   <public type="style" name="Theme.Wallpaper" />
   <public type="style" name="Theme.Wallpaper.NoTitleBar" />