Add AppWidgetManager#getInstalledProvidersForPackage()

This allows more fine-grained control than getting all installed
providers for a user, when you might only want to check for a particular
package. For instance, Launcher can use this API to surface widgets per
app without having to ask for all the widgets.

Test: Unit test on AppWidgetServiceImplTest
$ runtest --path=services/tests/servicestests/src/com/android/server/appwidget/AppWidgetServiceImplTest.java

Bug: 34940468
Change-Id: I182bf1c012d31182024422fc4a63f57f151c3ee5

1 files changed, 6 insertions, 3 deletions

diff --git a/services/appwidget/java/com/android/server/appwidget/AppWidgetServiceImpl.java b/services/appwidget/java/com/android/server/appwidget/AppWidgetServiceImpl.java
index 8aa37ef2d4eb..a5e56459eaf0 100644
--- a/services/appwidget/java/com/android/server/appwidget/AppWidgetServiceImpl.java
+++ b/services/appwidget/java/com/android/server/appwidget/AppWidgetServiceImpl.java
@@ -1633,7 +1633,7 @@ class AppWidgetServiceImpl extends IAppWidgetService.Stub implements WidgetBacku
 
     @Override
     public ParceledListSlice<AppWidgetProviderInfo> getInstalledProvidersForProfile(int categoryFilter,
-            int profileId) {
+            int profileId, String packageName) {
         final int userId = UserHandle.getCallingUserId();
 
         if (DEBUG) {
@@ -1655,8 +1655,11 @@ class AppWidgetServiceImpl extends IAppWidgetService.Stub implements WidgetBacku
                 Provider provider = mProviders.get(i);
                 AppWidgetProviderInfo info = provider.info;
 
-                // Ignore an invalid provider or one not matching the filter.
-                if (provider.zombie || (info.widgetCategory & categoryFilter) == 0) {
+                // Ignore an invalid provider, one not matching the filter,
+                // or one that isn't in the given package, if any.
+                boolean inPackage = packageName == null
+                        || provider.id.componentName.getPackageName().equals(packageName);
+                if (provider.zombie || (info.widgetCategory & categoryFilter) == 0 || !inPackage) {
                     continue;
                 }