From d33caa4dea521677431f86e719ac1df290a24c69 Mon Sep 17 00:00:00 2001
From: John Spurlock <jspurlock@google.com>
Date: Wed, 26 Sep 2012 12:40:54 -0400
Subject: [PATCH] Dream settings now looks for the settings activity in xml.

Uses the new api for obtaining dream metadata, no longer looks
for the settings activity using the old metadata key.

Bug:7172816
Change-Id: I5f9f9ea2a59df6a55c2f17bca5cdbe206f89d780
---
 src/com/android/settings/DreamBackend.java | 57 +++++++++++++++++++---
 1 file changed, 49 insertions(+), 8 deletions(-)

diff --git a/src/com/android/settings/DreamBackend.java b/src/com/android/settings/DreamBackend.java
index 68a31a13485..1a2f520e9f8 100644
--- a/src/com/android/settings/DreamBackend.java
+++ b/src/com/android/settings/DreamBackend.java
@@ -25,13 +25,24 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.content.res.Resources;
+import android.content.res.TypedArray;
+import android.content.res.XmlResourceParser;
 import android.graphics.drawable.Drawable;
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.provider.Settings;
+import android.service.dreams.Dream;
 import android.service.dreams.IDreamManager;
+import android.util.AttributeSet;
 import android.util.Log;
+import android.util.Xml;
 
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
@@ -40,11 +51,6 @@ import java.util.List;
 public class DreamBackend {
     private static final String TAG = DreamSettings.class.getSimpleName() + ".Backend";
 
-    // avoid breaking when the api changes.
-    // FIXME: use the new xml file when available
-    private static final String OLD_METADATA_NAME_CONFIG_ACTIVITY =
-            "android.service.dreams.config_activity";
-
     public static class DreamInfo {
         CharSequence caption;
         Drawable icon;
@@ -92,7 +98,7 @@ public class DreamBackend {
             dreamInfo.icon = resolveInfo.loadIcon(pm);
             dreamInfo.componentName = getDreamComponentName(resolveInfo);
             dreamInfo.isActive = dreamInfo.componentName.equals(activeDream);
-            dreamInfo.settingsComponentName = getSettingsComponentName(resolveInfo);
+            dreamInfo.settingsComponentName = getSettingsComponentName(pm, resolveInfo);
             dreamInfos.add(dreamInfo);
         }
         Collections.sort(dreamInfos, mComparator);
@@ -204,12 +210,47 @@ public class DreamBackend {
         return new ComponentName(resolveInfo.serviceInfo.packageName, resolveInfo.serviceInfo.name);
     }
 
-    private static ComponentName getSettingsComponentName(ResolveInfo resolveInfo) {
+    private static ComponentName getSettingsComponentName(PackageManager pm, ResolveInfo resolveInfo) {
         if (resolveInfo == null
                 || resolveInfo.serviceInfo == null
                 || resolveInfo.serviceInfo.metaData == null)
             return null;
-        String cn = resolveInfo.serviceInfo.metaData.getString(OLD_METADATA_NAME_CONFIG_ACTIVITY);
+        String cn = null;
+        XmlResourceParser parser = null;
+        Exception caughtException = null;
+        try {
+            parser = resolveInfo.serviceInfo.loadXmlMetaData(pm, Dream.DREAM_META_DATA);
+            if (parser == null) {
+                Log.w(TAG, "No " + Dream.DREAM_META_DATA + " meta-data");
+                return null;
+            }
+            Resources res = pm.getResourcesForApplication(resolveInfo.serviceInfo.applicationInfo);
+            AttributeSet attrs = Xml.asAttributeSet(parser);
+            int type;
+            while ((type=parser.next()) != XmlPullParser.END_DOCUMENT
+                    && type != XmlPullParser.START_TAG) {
+            }
+            String nodeName = parser.getName();
+            if (!"dream".equals(nodeName)) {
+                Log.w(TAG, "Meta-data does not start with dream tag");
+                return null;
+            }
+            TypedArray sa = res.obtainAttributes(attrs, com.android.internal.R.styleable.Dream);
+            cn = sa.getString(com.android.internal.R.styleable.Dream_settingsActivity);
+            sa.recycle();
+        } catch (NameNotFoundException e) {
+            caughtException = e;
+        } catch (IOException e) {
+            caughtException = e;
+        } catch (XmlPullParserException e) {
+            caughtException = e;
+        } finally {
+            if (parser != null) parser.close();
+        }
+        if (caughtException != null) {
+            Log.w(TAG, "Error parsing : " + resolveInfo.serviceInfo.packageName, caughtException);
+            return null;
+        }
         return cn == null ? null : ComponentName.unflattenFromString(cn);
     }