Add @TransitionRes for transition resource integers

Change-Id: I37f523282156c2f87c4d961167d6a980d5f6e34c

core/java/android/annotation/TransitionRes.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.annotation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.ElementType.PARAMETER;
+import static java.lang.annotation.RetentionPolicy.SOURCE;
+
+/**
+ * Denotes that an integer parameter, field or method return value is expected
+ * to be a transition resource reference.
+ *
+ * {@hide}
+ */
+@Documented
+@Retention(SOURCE)
+@Target({METHOD, PARAMETER, FIELD})
+public @interface TransitionRes {
+}

core/java/android/transition/TransitionInflater.java

@@ -16,6 +16,7 @@
 
 package android.transition;
 
+import android.annotation.TransitionRes;
 import com.android.internal.R;
 
 import org.xmlpull.v1.XmlPullParser;
@@ -71,7 +72,8 @@ public class TransitionInflater {
      * @throws android.content.res.Resources.NotFoundException when the
      * transition cannot be loaded
      */
-    public Transition inflateTransition(int resource) {
+    public Transition inflateTransition(@TransitionRes int resource) {
+        //noinspection ResourceType
         XmlResourceParser parser =  mContext.getResources().getXml(resource);
         try {
             return createTransitionFromXml(parser, Xml.asAttributeSet(parser), null);
@@ -98,7 +100,9 @@ public class TransitionInflater {
      * @throws android.content.res.Resources.NotFoundException when the
      * transition manager cannot be loaded
      */
-    public TransitionManager inflateTransitionManager(int resource, ViewGroup sceneRoot) {
+    public TransitionManager inflateTransitionManager(@TransitionRes int resource,
+            ViewGroup sceneRoot) {
+        //noinspection ResourceType
         XmlResourceParser parser =  mContext.getResources().getXml(resource);
         try {
             return createTransitionManagerFromXml(parser, Xml.asAttributeSet(parser), sceneRoot);