Allow AMS.moveTasksToFullscreenStack moving tasks onTop

Bug: 26573473
Change-Id: I4517ac2b3e803637971c329be2511ba66412d815

4 files changed, 20 insertions, 8 deletions

diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index 624131ee036f..08f37f5bd51b 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -2798,7 +2798,8 @@ public abstract class ActivityManagerNative extends Binder implements IActivityM
         case MOVE_TASKS_TO_FULLSCREEN_STACK_TRANSACTION: {
             data.enforceInterface(IActivityManager.descriptor);
             final int stackId = data.readInt();
-            moveTasksToFullscreenStack(stackId);
+            final boolean onTop = data.readInt() == 1;
+            moveTasksToFullscreenStack(stackId, onTop);
             reply.writeNoException();
             return true;
         }
@@ -6573,11 +6574,12 @@ class ActivityManagerProxy implements IActivityManager
     }
 
     @Override
-    public void moveTasksToFullscreenStack(int fromStackId) throws RemoteException {
+    public void moveTasksToFullscreenStack(int fromStackId, boolean onTop) throws RemoteException {
         Parcel data = Parcel.obtain();
         Parcel reply = Parcel.obtain();
         data.writeInterfaceToken(IActivityManager.descriptor);
         data.writeInt(fromStackId);
+        data.writeInt(onTop ? 1 : 0);
         mRemote.transact(MOVE_TASKS_TO_FULLSCREEN_STACK_TRANSACTION, data, reply, 0);
         reply.readException();
         data.recycle();
diff --git a/core/java/android/app/IActivityManager.java b/core/java/android/app/IActivityManager.java
index 1ae91a65bba2..25b7841a3b66 100644
--- a/core/java/android/app/IActivityManager.java
+++ b/core/java/android/app/IActivityManager.java
@@ -577,7 +577,7 @@ public interface IActivityManager extends IInterface {
 
     public void suppressResizeConfigChanges(boolean suppress) throws RemoteException;
 
-    public void moveTasksToFullscreenStack(int fromStackId) throws RemoteException;
+    public void moveTasksToFullscreenStack(int fromStackId, boolean onTop) throws RemoteException;
 
     public int getAppStartMode(int uid, String packageName) throws RemoteException;
 
diff --git a/packages/SystemUI/src/com/android/systemui/stackdivider/WindowManagerProxy.java b/packages/SystemUI/src/com/android/systemui/stackdivider/WindowManagerProxy.java
index 2791dfc3972e..67bb58ae8fc9 100644
--- a/packages/SystemUI/src/com/android/systemui/stackdivider/WindowManagerProxy.java
+++ b/packages/SystemUI/src/com/android/systemui/stackdivider/WindowManagerProxy.java
@@ -85,7 +85,8 @@ public class WindowManagerProxy {
         @Override
         public void run() {
             try {
-                ActivityManagerNative.getDefault().moveTasksToFullscreenStack(DOCKED_STACK_ID);
+                ActivityManagerNative.getDefault().moveTasksToFullscreenStack(
+                        DOCKED_STACK_ID, false /* onTop */);
             } catch (RemoteException e) {
                 Log.w(TAG, "Failed to remove stack: " + e);
             }
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 093a33dc6049..05962457a699 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -18155,7 +18155,7 @@ public final class ActivityManagerService extends ActivityManagerNative
     }
 
     @Override
-    public void moveTasksToFullscreenStack(int fromStackId) {
+    public void moveTasksToFullscreenStack(int fromStackId, boolean onTop) {
         enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "moveTasksToFullscreenStack()");
         if (fromStackId == HOME_STACK_ID) {
             throw new IllegalArgumentException("You can't move tasks from the home stack.");
@@ -18165,9 +18165,18 @@ public final class ActivityManagerService extends ActivityManagerNative
             final ActivityStack stack = mStackSupervisor.getStack(fromStackId);
             if (stack != null) {
                 final ArrayList<TaskRecord> tasks = stack.getAllTasks();
-                for (int i = tasks.size() - 1; i >= 0; i--) {
-                    mStackSupervisor.positionTaskInStackLocked(tasks.get(i).taskId,
-                            FULLSCREEN_WORKSPACE_STACK_ID, 0);
+                final int size = tasks.size();
+                if (onTop) {
+                    for (int i = 0; i < size; i++) {
+                        mStackSupervisor.moveTaskToStackLocked(tasks.get(i).taskId,
+                                FULLSCREEN_WORKSPACE_STACK_ID, ON_TOP, !FORCE_FOCUS,
+                                "moveTasksToFullscreenStack", ANIMATE);
+                    }
+                } else {
+                    for (int i = size - 1; i >= 0; i--) {
+                        mStackSupervisor.positionTaskInStackLocked(tasks.get(i).taskId,
+                                FULLSCREEN_WORKSPACE_STACK_ID, 0);
+                    }
                 }
             }
             Binder.restoreCallingIdentity(origId);