Add ability to listen to LockTask state changes

Bug: 176211023
Test: Presubmit
Change-Id: I1e9e7151d45751ec6398588788c512f23b2f9fb5

2 files changed, 10 insertions, 0 deletions

diff --git a/core/java/android/app/ITaskStackListener.aidl b/core/java/android/app/ITaskStackListener.aidl
index a9e28bb635be..b1c39d39d414 100644
--- a/core/java/android/app/ITaskStackListener.aidl
+++ b/core/java/android/app/ITaskStackListener.aidl
@@ -209,4 +209,10 @@ oneway interface ITaskStackListener {
      * @param taskInfo info about the task which moved
      */
     void onTaskMovedToBack(in ActivityManager.RunningTaskInfo taskInfo);
+
+    /**
+     * Called when the lock task mode changes. See ActivityManager#LOCK_TASK_MODE_* and
+     * LockTaskController.
+     */
+    void onLockTaskModeChanged(int mode);
 }
diff --git a/core/java/android/app/TaskStackListener.java b/core/java/android/app/TaskStackListener.java
index 517ae24b75a6..1e382307a1a3 100644
--- a/core/java/android/app/TaskStackListener.java
+++ b/core/java/android/app/TaskStackListener.java
@@ -193,4 +193,8 @@ public abstract class TaskStackListener extends ITaskStackListener.Stub {
     @Override
     public void onTaskMovedToBack(RunningTaskInfo taskInfo) {
     }
+
+    @Override
+    public void onLockTaskModeChanged(int mode) {
+    }
 }