Adding internal method replacePreferredActivity.

This was required because we need a way to set the preferred activity for a
particular intent filter based on user selection (in our case the
ACTION_WEB_SEARCH intent filter for selecting the preferred search engine from
the list of available search engines providers). The current
addPreferredActivity call was not sufficient since it leaves the existing
preferred activities in the list and does not remove them, which this call
does.

1 files changed, 37 insertions, 0 deletions

diff --git a/services/java/com/android/server/PackageManagerService.java b/services/java/com/android/server/PackageManagerService.java
index c9bdd3c..8da40ac 100644
--- a/services/java/com/android/server/PackageManagerService.java
+++ b/services/java/com/android/server/PackageManagerService.java
@@ -19,6 +19,7 @@ package com.android.server;
 import com.android.internal.app.ResolverActivity;
 import com.android.internal.util.FastXmlSerializer;
 import com.android.internal.util.XmlUtils;
+import com.android.server.PackageManagerService.PreferredActivity;
 
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
@@ -4507,6 +4508,42 @@ class PackageManagerService extends IPackageManager.Stub {
         }
     }
 
+    public void replacePreferredActivity(IntentFilter filter, int match,
+            ComponentName[] set, ComponentName activity) {
+        mContext.enforceCallingOrSelfPermission(
+                android.Manifest.permission.SET_PREFERRED_APPLICATIONS, null);
+        if (filter.countActions() != 1) {
+            throw new IllegalArgumentException(
+                    "replacePreferredActivity expects filter to have only 1 action.");
+        }
+        if (filter.countCategories() != 1) {
+            throw new IllegalArgumentException(
+                    "replacePreferredActivity expects filter to have only 1 category.");
+        }
+        if (filter.countDataAuthorities() != 0
+                || filter.countDataPaths() != 0
+                || filter.countDataSchemes() != 0
+                || filter.countDataTypes() != 0) {
+            throw new IllegalArgumentException(
+                    "replacePreferredActivity expects filter to have no data authorities, " +
+                    "paths, schemes or types.");
+        }
+        synchronized (mPackages) {
+            Iterator<PreferredActivity> it = mSettings.mPreferredActivities.filterIterator();
+            String action = filter.getAction(0);
+            String category = filter.getCategory(0);
+            while (it.hasNext()) {
+                PreferredActivity pa = it.next();
+                if (pa.getAction(0).equals(action) && pa.getCategory(0).equals(category)) {
+                    it.remove();
+                    Log.i(TAG, "Removed preferred activity " + pa.mActivity + ":");
+                    filter.dump(new LogPrinter(Log.INFO, TAG), "  ");
+                }
+            }
+            addPreferredActivity(filter, match, set, activity);
+        }
+    }
+
     public void clearPackagePreferredActivities(String packageName) {
         mContext.enforceCallingOrSelfPermission(
                 android.Manifest.permission.SET_PREFERRED_APPLICATIONS, null);