Fix blank lockscreen.

Bug: 15281241
Change-Id: If315891274a97fa5cc579554b83b85cf3c87f0fb

3 files changed, 61 insertions, 15 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardPageSwipeHelper.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardPageSwipeHelper.java
index 086a266c443a..e312d5850fb1 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardPageSwipeHelper.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardPageSwipeHelper.java
@@ -423,6 +423,7 @@ public class KeyguardPageSwipeHelper {
             return;
         }
         if (!animate) {
+            view.animate().cancel();
             view.setAlpha(alpha);
             view.setScaleX(scale);
             view.setScaleY(scale);
@@ -465,6 +466,13 @@ public class KeyguardPageSwipeHelper {
     }
 
     public void reset() {
+        if (mSwipeAnimator != null) {
+            mSwipeAnimator.cancel();
+        }
+        ArrayList<View> targetViews = mCallback.getTranslationViews();
+        for (View view : targetViews) {
+            view.animate().cancel();
+        }
         setTranslation(0.0f, true);
         mSwipingInProgress = false;
     }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
index 772d0e7e9a3b..1f3098d94d41 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
@@ -27,6 +27,7 @@ import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.ViewConfiguration;
+import android.view.ViewTreeObserver;
 import android.view.animation.AnimationUtils;
 import android.view.animation.Interpolator;
 import android.widget.FrameLayout;
@@ -67,6 +68,11 @@ public abstract class PanelView extends FrameLayout {
     private VelocityTrackerInterface mVelocityTracker;
     private FlingAnimationUtils mFlingAnimationUtils;
 
+    /**
+     * Whether an instant expand request is currently pending and we are just waiting for layout.
+     */
+    private boolean mInstantExpanding;
+
     PanelBar mBar;
 
     protected int mMaxPanelHeight = -1;
@@ -128,6 +134,9 @@ public abstract class PanelView extends FrameLayout {
 
     @Override
     public boolean onTouchEvent(MotionEvent event) {
+        if (mInstantExpanding) {
+            return false;
+        }
 
         /*
          * We capture touch events here and update the expand height here in case according to
@@ -263,6 +272,9 @@ public abstract class PanelView extends FrameLayout {
 
     @Override
     public boolean onInterceptTouchEvent(MotionEvent event) {
+        if (mInstantExpanding) {
+            return false;
+        }
 
         /*
          * If the user drags anywhere inside the panel we intercept it if he moves his finger
@@ -556,6 +568,41 @@ public abstract class PanelView extends FrameLayout {
         }
     }
 
+    public void instantExpand() {
+        mInstantExpanding = true;
+        abortAnimations();
+        if (mTracking) {
+            onTrackingStopped(true /* expands */); // The panel is expanded after this call.
+            onExpandingFinished();
+        }
+        setVisibility(VISIBLE);
+
+        // Wait for window manager to pickup the change, so we know the maximum height of the panel
+        // then.
+        getViewTreeObserver().addOnGlobalLayoutListener(
+                new ViewTreeObserver.OnGlobalLayoutListener() {
+                    @Override
+                    public void onGlobalLayout() {
+                        if (mStatusBar.getStatusBarWindow().getHeight()
+                                != mStatusBar.getStatusBarHeight()) {
+                            getViewTreeObserver().removeOnGlobalLayoutListener(this);
+                            setExpandedFraction(1f);
+                            mInstantExpanding = false;
+                        }
+                    }
+                });
+
+        // Make sure a layout really happens.
+        requestLayout();
+    }
+
+    private void abortAnimations() {
+        cancelPeek();
+        if (mHeightAnimator != null) {
+            mHeightAnimator.cancel();
+        }
+    }
+
     protected void startUnlockHintAnimation() {
 
         // We don't need to hint the user if an animation is already running or the user is changing
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index 522321770993..d7b1d35ea48f 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -831,6 +831,10 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,
         return mStatusBarView;
     }
 
+    public StatusBarWindowView getStatusBarWindow() {
+        return mStatusBarWindow;
+    }
+
     @Override
     protected WindowManager.LayoutParams getSearchLayoutParams(LayoutParams layoutParams) {
         boolean opaque = false;
@@ -2966,22 +2970,9 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,
 
     private void instantExpandNotificationsPanel() {
 
-        // Make our window larger and the panel visible.
+        // Make our window larger and the panel expanded.
         makeExpandedVisible(true);
-        mNotificationPanel.setVisibility(View.VISIBLE);
-
-        // Wait for window manager to pickup the change, so we know the maximum height of the panel
-        // then.
-        mNotificationPanel.getViewTreeObserver().addOnGlobalLayoutListener(
-                new ViewTreeObserver.OnGlobalLayoutListener() {
-            @Override
-            public void onGlobalLayout() {
-                if (mStatusBarWindow.getHeight() != getStatusBarHeight()) {
-                    mNotificationPanel.getViewTreeObserver().removeOnGlobalLayoutListener(this);
-                    mNotificationPanel.setExpandedFraction(1);
-                }
-            }
-        });
+        mNotificationPanel.instantExpand();
     }
 
     private void instantCollapseNotificationPanel() {