Only keep running task id.

Change-Id: I5a1488aacd4e3ec8d2131ddbd953db6409d737fd
diff --git a/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java b/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java
index 944804b..e2abd59 100644
--- a/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java
+++ b/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java
@@ -92,7 +92,7 @@
     // animated to 1, so allow for a smooth transition.
     private final AnimatedFloat mActivityMultiplier = new AnimatedFloat(this::updateFinalShift);
 
-    private final Task mRunningTask;
+    private final int mRunningTaskId;
     private final Context mContext;
 
     private final MultiStateCallback mStateCallback;
@@ -116,13 +116,9 @@
 
     NavBarSwipeInteractionHandler(RunningTaskInfo runningTaskInfo, Context context,
             @InteractionType int interactionType) {
-        // TODO: We need a better way for this
-        TaskKey taskKey = new TaskKey(runningTaskInfo.id, 0, null, UserHandle.myUserId(), 0);
-        mRunningTask = new Task(taskKey, null, null, "", "", Color.BLACK, Color.BLACK,
-                true, false, false, false, null, 0, null, false);
-
         mContext = context;
         mInteractionType = interactionType;
+        mRunningTaskId = runningTaskInfo.id;
         WindowManagerWrapper.getInstance().getStableInsets(mStableInsets);
 
         DeviceProfile dp = LauncherAppState.getIDP(mContext).getDeviceProfile(mContext);
@@ -192,7 +188,7 @@
         launcher.setOnResumeCallback(this);
         mLauncher = launcher;
         mRecentsView = launcher.getOverviewPanel();
-        mRecentsView.showTask(mRunningTask);
+        mRecentsView.showTask(mRunningTaskId);
         mHotseat = mLauncher.getHotseat();
         mWasLauncherAlreadyVisible = alreadyOnHome;
 
@@ -340,18 +336,15 @@
 
     @UiThread
     private void resumeLastTask() {
-        // TODO: We need a better way for this
-        TaskKey key = mRunningTask.key;
         RecentsTaskLoadPlan loadPlan = RecentsModel.getInstance(mContext).getLastLoadPlan();
         if (loadPlan != null) {
-            Task task = loadPlan.getTaskStack().findTaskWithId(key.id);
+            Task task = loadPlan.getTaskStack().findTaskWithId(mRunningTaskId);
             if (task != null) {
-                key = task.key;
+                ActivityOptions opts = ActivityOptions.makeCustomAnimation(mContext, 0, 0);
+                ActivityManagerWrapper.getInstance().startActivityFromRecentsAsync(task.key, opts,
+                        null, null);
             }
         }
-
-        ActivityOptions opts = ActivityOptions.makeCustomAnimation(mContext, 0, 0);
-        ActivityManagerWrapper.getInstance().startActivityFromRecentsAsync(key, opts, null, null);
     }
 
     public void reset() {
@@ -380,8 +373,7 @@
         if (mInteractionType == INTERACTION_QUICK_SWITCH) {
             for (int i = mRecentsView.getFirstTaskIndex(); i < mRecentsView.getPageCount(); i++) {
                 TaskView taskView = (TaskView) mRecentsView.getPageAt(i);
-                // TODO: Match the keys directly
-                if (taskView.getTask().key.id != mRunningTask.key.id) {
+                if (taskView.getTask().key.id != mRunningTaskId) {
                     mRecentsView.snapToPage(i, QUICK_SWITCH_SNAP_DURATION);
                     taskView.postDelayed(() -> {taskView.launchTask(true);},
                             QUICK_SWITCH_SNAP_DURATION);
diff --git a/quickstep/src/com/android/quickstep/RecentsView.java b/quickstep/src/com/android/quickstep/RecentsView.java
index 6937c1f..8e03f37 100644
--- a/quickstep/src/com/android/quickstep/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/RecentsView.java
@@ -98,7 +98,8 @@
     private final RecentsModel mModel;
     private int mLoadPlanId = -1;
 
-    private Task mFirstTask;
+    // Only valid until the launcher state changes to NORMAL
+    private int mRunningTaskId = -1;
 
     private Bitmap mScrim;
     private Paint mFadePaint;
@@ -241,13 +242,6 @@
         final ArrayList<Task> tasks = new ArrayList<>(stack.getTasks());
         setLayoutTransition(null);
 
-        if (mFirstTask != null) {
-            // TODO: Handle this case here once we have a valid implementation for mFirstTask
-            if (tasks.isEmpty() || !keysEquals(tasks.get(tasks.size() - 1), mFirstTask)) {
-                // tasks.add(mFirstTask);
-            }
-        }
-
         final int requiredChildCount = tasks.size() + mFirstTaskIndex;
         for (int i = getChildCount(); i < requiredChildCount; i++) {
             final TaskView taskView = (TaskView) inflater.inflate(R.layout.task, this, false);
@@ -394,7 +388,7 @@
     }
 
     public void reset() {
-        mFirstTask = null;
+        mRunningTaskId = -1;
         setCurrentPage(0);
     }
 
@@ -407,11 +401,7 @@
      */
     public void reloadIfNeeded() {
         if (!mModel.isLoadPlanValid(mLoadPlanId)) {
-            int taskId = -1;
-            if (mFirstTask != null) {
-                taskId = mFirstTask.key.id;
-            }
-            mLoadPlanId = mModel.loadTasks(taskId, this::applyLoadPlan);
+            mLoadPlanId = mModel.loadTasks(mRunningTaskId, this::applyLoadPlan);
         }
     }
 
@@ -423,41 +413,30 @@
      * is called.
      * Also scrolls the view to this task
      */
-    public void showTask(Task task) {
+    public void showTask(int runningTaskId) {
         boolean needsReload = false;
-        boolean inflateFirstChild = true;
-        if (getTaskCount() > 0) {
-            TaskView tv = (TaskView) getChildAt(mFirstTaskIndex);
-            inflateFirstChild = !keysEquals(tv.getTask(), task);
-        }
-        if (inflateFirstChild) {
+        if (getTaskCount() == 0) {
             needsReload = true;
-            setLayoutTransition(null);
             // Add an empty view for now
+            setLayoutTransition(null);
             final TaskView taskView = (TaskView) LayoutInflater.from(getContext())
                     .inflate(R.layout.task, this, false);
             addView(taskView, mFirstTaskIndex);
-            taskView.bind(task);
             setLayoutTransition(mLayoutTransition);
         }
         if (!needsReload) {
             needsReload = !mModel.isLoadPlanValid(mLoadPlanId);
         }
         if (needsReload) {
-            mLoadPlanId = mModel.loadTasks(task.key.id, this::applyLoadPlan);
+            mLoadPlanId = mModel.loadTasks(runningTaskId, this::applyLoadPlan);
         }
-        mFirstTask = task;
+        mRunningTaskId = runningTaskId;
         setCurrentPage(mFirstTaskIndex);
         if (mCurrentPage >= mFirstTaskIndex) {
             ((TaskView) getPageAt(mCurrentPage)).setIconScale(0);
         }
     }
 
-    private static boolean keysEquals(Task t1, Task t2) {
-        // TODO: Match the keys directly
-        return t1.key.id == t2.key.id;
-    }
-
     public QuickScrubController getQuickScrubController() {
         return mQuickScrubController;
     }
diff --git a/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java b/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
index e5110e6..652f142 100644
--- a/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
+++ b/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
@@ -106,8 +106,8 @@
 
     private final MainThreadExecutor mMainExecutor = new MainThreadExecutor();
 
-    private final Task mRunningTask;
     private final Context mContext;
+    private final int mRunningTaskId;
 
     private MultiStateCallback mStateCallback;
     private boolean mControllerStateAnimation;
@@ -131,11 +131,8 @@
     private Matrix mTmpMatrix = new Matrix();
 
     WindowTransformSwipeHandler(RunningTaskInfo runningTaskInfo, Context context) {
-        // TODO: We need a better way for this
-        TaskKey taskKey = new TaskKey(runningTaskInfo.id, 0, null, UserHandle.myUserId(), 0);
-        mRunningTask = new Task(taskKey, null, null, "", "", Color.BLACK, Color.BLACK,
-                true, false, false, false, null, 0, null, false);
         mContext = context;
+        mRunningTaskId = runningTaskInfo.id;
 
         WindowManagerWrapper.getInstance().getStableInsets(mStableInsets);
 
@@ -257,7 +254,7 @@
         }
 
         mRecentsView = mLauncher.getOverviewPanel();
-        mRecentsView.showTask(mRunningTask);
+        mRecentsView.showTask(mRunningTaskId);
         mWasLauncherAlreadyVisible = alreadyOnHome;
         mLauncherLayoutListener = new LauncherLayoutListener(mLauncher, this);
         mLauncher.getDragLayer().addView(mLauncherLayoutListener);
@@ -480,7 +477,7 @@
             for (int i = mRecentsView.getFirstTaskIndex(); i < mRecentsView.getPageCount(); i++) {
                 TaskView taskView = (TaskView) mRecentsView.getPageAt(i);
                 // TODO: Match the keys directly
-                if (taskView.getTask().key.id != mRunningTask.key.id) {
+                if (taskView.getTask().key.id != mRunningTaskId) {
                     mRecentsView.snapToPage(i, QUICK_SWITCH_SNAP_DURATION);
                     taskView.postDelayed(() -> {taskView.launchTask(true);},
                             QUICK_SWITCH_SNAP_DURATION);