Add a way to get Transitions from a TransitionSet.

Bug 17113732

Change-Id: I0a157a59448e66560ba2252709971131c5dea401

1 files changed, 25 insertions, 0 deletions

diff --git a/core/java/android/transition/TransitionSet.java b/core/java/android/transition/TransitionSet.java
index 83c60af60880..68af2d1686e9 100644
--- a/core/java/android/transition/TransitionSet.java
+++ b/core/java/android/transition/TransitionSet.java
@@ -151,6 +151,31 @@ public class TransitionSet extends Transition {
     }
 
     /**
+     * Returns the number of child transitions in the TransitionSet.
+     *
+     * @return The number of child transitions in the TransitionSet.
+     * @see #addTransition(Transition)
+     * @see #getTransitionAt(int)
+     */
+    public int getTransitionCount() {
+        return mTransitions.size();
+    }
+
+    /**
+     * Returns the child Transition at the specified position in the TransitionSet.
+     *
+     * @param index The position of the Transition to retrieve.
+     * @see #addTransition(Transition)
+     * @see #getTransitionCount()
+     */
+    public Transition getTransitionAt(int index) {
+        if (index < 0 || index >= mTransitions.size()) {
+            return null;
+        }
+        return mTransitions.get(index);
+    }
+
+    /**
      * Setting a non-negative duration on a TransitionSet causes all of the child
      * transitions (current and future) to inherit this duration.
      *