Fixing bug with workspace drop animation

Change-Id: I4f7682e588730905170fd534a415688ebbf64eea

src/com/android/launcher2/CellLayout.java

@@ -963,14 +963,10 @@ public class CellLayout extends ViewGroup implements Dimmable, VisibilityChanged
                     if (lp.animateDrop) {
                         lp.animateDrop = false;
 
-                        // This call needs to be posted since it results in a requestLayout()
-                        // which shouldn't be called from within a layout pass (can cause a bad
-                        // state of the tree).
-                        post(new Runnable() {
-                            public void run() {
-                                ((Workspace) mParent).animateViewIntoPosition(child);
-                            }
-                        });
+                        // This call does not result in a requestLayout(), but at one point did.
+                        // We need to be cautious about any method calls within the layout pass
+                        // to insure we don't leave the view tree in a bad state.
+                        ((Workspace) mParent).animateViewIntoPosition(child);
                     }
                 }
             }
@@ -1392,7 +1388,7 @@ public class CellLayout extends ViewGroup implements Dimmable, VisibilityChanged
             lp.isDragging = false;
             lp.dropped = true;
             lp.animateDrop = animate;
-            child.setVisibility(View.VISIBLE);
+            child.setVisibility(View.INVISIBLE);
             child.requestLayout();
         }
     }

src/com/android/launcher2/Workspace.java

@@ -1516,6 +1516,10 @@ public class Workspace extends SmoothPagedView
         lp.oldY = viewY - (parent.getTop() - mScrollY);
     }
 
+    /*
+     * We should be careful that this method cannot result in any synchronous requestLayout()
+     * calls, as it is called from onLayout().
+     */
     public void animateViewIntoPosition(final View view) {
         final CellLayout parent = (CellLayout) view.getParent();
         final CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams();
@@ -1574,7 +1578,6 @@ public class Workspace extends SmoothPagedView
             }
         });
 
-        view.setVisibility(View.INVISIBLE);
         mDropAnim.start();
     }