Add rule emissions for appComponentFactory

This attribute was added in API 28 and is reflectively instantiated from a zero-argument constructor.

Test: make aapt2_tests
Change-Id: Ie9de0764165c6fe6c6fcda6cc38b0cc633f03bbd

2 files changed, 9 insertions, 0 deletions

diff --git a/tools/aapt2/java/ProguardRules.cpp b/tools/aapt2/java/ProguardRules.cpp
index d03cdb3d8518..92487f4e6854 100644
--- a/tools/aapt2/java/ProguardRules.cpp
+++ b/tools/aapt2/java/ProguardRules.cpp
@@ -259,6 +259,13 @@ class ManifestVisitor : public BaseVisitor {
             AddClass(node->line_number, result.value());
           }
         }
+        attr = node->FindAttribute(xml::kSchemaAndroid, "appComponentFactory");
+        if (attr) {
+          Maybe<std::string> result = util::GetFullyQualifiedClassName(package_, attr->value);
+          if (result) {
+            AddClass(node->line_number, result.value());
+          }
+        }
         if (main_dex_only_) {
           xml::Attribute* default_process = node->FindAttribute(xml::kSchemaAndroid, "process");
           if (default_process) {
diff --git a/tools/aapt2/java/ProguardRules_test.cpp b/tools/aapt2/java/ProguardRules_test.cpp
index 6e0df50bd9c4..aeb9eb6e91c4 100644
--- a/tools/aapt2/java/ProguardRules_test.cpp
+++ b/tools/aapt2/java/ProguardRules_test.cpp
@@ -38,6 +38,7 @@ TEST(ProguardRulesTest, ManifestRuleDefaultConstructorOnly) {
   std::unique_ptr<xml::XmlResource> manifest = test::BuildXmlDom(R"(
       <manifest xmlns:android="http://schemas.android.com/apk/res/android">
         <application
+            android:appComponentFactory="com.foo.BarAppComponentFactory"
             android:backupAgent="com.foo.BarBackupAgent"
             android:name="com.foo.BarApplication"
             >
@@ -54,6 +55,7 @@ TEST(ProguardRulesTest, ManifestRuleDefaultConstructorOnly) {
 
   std::string actual = GetKeepSetString(set);
 
+  EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarAppComponentFactory { <init>(); }"));
   EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarBackupAgent { <init>(); }"));
   EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarApplication { <init>(); }"));
   EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarActivity { <init>(); }"));