commit ddc1cb2c15549ed23dce9d416680a009fa6ae23c
author Wale Ogunwale <ogunwale@google.com> Sat Jul 25 19:23:04 2015 -0700
committer Wale Ogunwale <ogunwale@google.com> Sat Aug 01 10:50:18 2015 -0700
tree 4be522e78d2c51070c0a41b27e6a917df5afada6
parent 2617b5db9c081a2f39ed26047cbdc63acbd9ae81

Added support for static vs. dynamic stacks

Now that stacks represent workspaces we can define static
stacks which help shape the characteristics of the tasks
they contain. For example, fullscreen tasks/activities will
normally be launched in the stack with id
FULLSCREEN_WORKSPACE_STACK_ID, while freeform tasks/activities
will normally be launched in the stack with id
FREEFORM_WORKSPACE_STACK_ID.

Also, added ability to position a task at any index in a stack.

Bug: 22068114
Change-Id: Ib6c62a84b5f204fbf072755264c5c5eda6184f97

core/java/android/app/ActivityManager.java

diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index 5974fcf..b7a7d07 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -404,6 +404,42 @@
      */
     public static final int COMPAT_MODE_TOGGLE = 2;
 
+    /**
+     * First static stack stack ID.
+     * @hide
+     */
+    public static final int FIRST_STATIC_STACK_ID = 0;
+
+    /**
+     * Home activity stack ID.
+     * @hide
+     */
+    public static final int HOME_STACK_ID = FIRST_STATIC_STACK_ID;
+
+    /**
+     * ID of stack where fullscreen activities are normally launched into.
+     * @hide
+     */
+    public static final int FULLSCREEN_WORKSPACE_STACK_ID = 1;
+
+    /**
+     * ID of stack where freeform/resized activities are normally launched into.
+     * @hide
+     */
+    public static final int FREEFORM_WORKSPACE_STACK_ID = FULLSCREEN_WORKSPACE_STACK_ID + 1;
+
+    /**
+     * Last static stack stack ID.
+     * @hide
+     */
+    public static final int LAST_STATIC_STACK_ID = FREEFORM_WORKSPACE_STACK_ID;
+
+    /**
+     * Start of ID range used by stacks that are created dynamically.
+     * @hide
+     */
+    public static final int FIRST_DYNAMIC_STACK_ID = LAST_STATIC_STACK_ID + 1;
+
     /** @hide */
     public int getFrontActivityScreenCompatMode() {
         try {

core/java/android/app/ActivityManagerNative.java

diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index facaee4..abfe215 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -752,6 +752,16 @@
             return true;
         }
 
+        case POSITION_TASK_IN_STACK_TRANSACTION: {
+            data.enforceInterface(IActivityManager.descriptor);
+            int taskId = data.readInt();
+            int stackId = data.readInt();
+            int position = data.readInt();
+            positionTaskInStack(taskId, stackId, position);
+            reply.writeNoException();
+            return true;
+        }
+
         case GET_ALL_STACK_INFOS_TRANSACTION: {
             data.enforceInterface(IActivityManager.descriptor);
             List<StackInfo> list = getAllStackInfos();
@@ -3469,6 +3479,20 @@
         reply.recycle();
     }
     @Override
+    public void positionTaskInStack(int taskId, int stackId, int position) throws RemoteException
+    {
+        Parcel data = Parcel.obtain();
+        Parcel reply = Parcel.obtain();
+        data.writeInterfaceToken(IActivityManager.descriptor);
+        data.writeInt(taskId);
+        data.writeInt(stackId);
+        data.writeInt(position);
+        mRemote.transact(POSITION_TASK_IN_STACK_TRANSACTION, data, reply, 0);
+        reply.readException();
+        data.recycle();
+        reply.recycle();
+    }
+    @Override
     public List<StackInfo> getAllStackInfos() throws RemoteException
     {
         Parcel data = Parcel.obtain();

core/java/android/app/IActivityManager.java

diff --git a/core/java/android/app/IActivityManager.java b/core/java/android/app/IActivityManager.java
index c3e55f1..4944bfc 100644
--- a/core/java/android/app/IActivityManager.java
+++ b/core/java/android/app/IActivityManager.java
@@ -139,6 +139,7 @@
     public void moveTaskBackwards(int task) throws RemoteException;
     public void moveTaskToStack(int taskId, int stackId, boolean toTop) throws RemoteException;
     public void resizeStack(int stackId, Rect bounds) throws RemoteException;
+    public void positionTaskInStack(int taskId, int stackId, int position) throws RemoteException;
     public List<StackInfo> getAllStackInfos() throws RemoteException;
     public StackInfo getStackInfo(int stackId) throws RemoteException;
     public boolean isInHomeStack(int taskId) throws RemoteException;
@@ -874,4 +875,5 @@
     // Start of N transactions
     int START_BINDER_TRACKING_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION + 340;
     int STOP_BINDER_TRACKING_AND_DUMP_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION + 341;
+    int POSITION_TASK_IN_STACK_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION + 342;
 }