timob-15345: Android: ScrollableView does not show after using a 2D matrix transform

android/titanium/project.properties

@@ -10,4 +10,4 @@
 android.library=true
 android.library.reference.1=../runtime/common
 # Project target.
-target=android-14
+target=android-16

android/titanium/src/java/org/appcelerator/titanium/util/TiAnimationBuilder.java

@@ -693,7 +693,6 @@ private AnimationSet buildViewAnimations(int x, int y, int w, int h,
 			}
 
 			anim = new TiMatrixAnimation(tdm, anchorX, anchorY);
-
 			addAnimation(as, anim);
 
 		}
@@ -1297,7 +1296,7 @@ private void setAnchor(int width, int height, float thisAnchorX,
 	 * @return true if the map of running animations contains
 	 * the View, false otherwise.
 	 */
-	private static boolean isAnimationRunningFor(View v)
+	public static boolean isAnimationRunningFor(View v)
 	{
 		if (sRunningViews.size() == 0) {
 			return false;
@@ -1378,4 +1377,9 @@ private void prepareOpacityForAnimation()
 		}
 		tiView.setOpacity(1.0f);
 	}
+
+	public boolean isUsingPropertyAnimators()
+	{
+		return (tdm == null || tdm.canUsePropertyAnimators());
+	}
 }

android/titanium/src/java/org/appcelerator/titanium/view/TiUIView.java

@@ -31,16 +31,15 @@
 import org.appcelerator.titanium.view.TiCompositeLayout.LayoutParams;
 import org.appcelerator.titanium.view.TiGradientDrawable.GradientType;
 
-import android.annotation.TargetApi;
 import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.Context;
 import android.graphics.Color;
 import android.graphics.Matrix;
 import android.graphics.Paint;
 import android.graphics.Point;
 import android.graphics.Rect;
-import android.graphics.RectF;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.support.v4.view.ViewCompat;
@@ -61,6 +60,8 @@
 import android.view.View.OnTouchListener;
 import android.view.ViewGroup;
 import android.view.ViewParent;
+import android.view.ViewTreeObserver.OnGlobalLayoutListener;
+import android.view.ViewTreeObserver.OnPreDrawListener;
 import android.view.animation.Animation;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.AdapterView;
@@ -451,7 +452,68 @@ protected void applyTransform(Ti2DMatrix matrix)
 		options.put(TiC.PROPERTY_DURATION, 1);
 
 		animBuilder.applyOptions(options);
-		animBuilder.start(this.proxy, outerView);
+
+		// When using Honeycomb+ property Animators, we can only use absolute values to specify the anchor point, eg. "50px".
+		// Therefore, we must start the transformation after the layout pass when we get the height and width of the view.
+		if (animBuilder.isUsingPropertyAnimators()) {
+			startTransformAfterLayout(outerView);
+		} else {
+			animBuilder.start(this.proxy, outerView);
+		}
+	}
+
+	/**
+	 * When using Honeycomb+ property Animators, we start the transformation after the layout pass.
+	 * @param v the view to animate
+	 */
+	protected void startTransformAfterLayout(final View v)
+	{
+		final TiViewProxy p = this.proxy;
+		OnGlobalLayoutListener layoutListener = new OnGlobalLayoutListener() {
+			public void onGlobalLayout()
+			{
+				animBuilder.start(p, v);
+				try {
+					if (Build.VERSION.SDK_INT < TiC.API_LEVEL_JELLY_BEAN) {
+						v.getViewTreeObserver().removeGlobalOnLayoutListener(this);
+					} else {
+						v.getViewTreeObserver().removeOnGlobalLayoutListener(this);
+					}
+				} catch (IllegalStateException e) {
+					if (Log.isDebugModeEnabled()) {
+						Log.w(TAG, "Unable to remove the OnGlobalLayoutListener.", e.getMessage());
+					}
+				}
+			}
+		};
+		v.getViewTreeObserver().addOnGlobalLayoutListener(layoutListener);
+
+		// On Jelly Bean+, the view will visibly transform if the transformation starts after the layout pass,
+		// so we add OnPreDrawListener to skip the drawing pass before the animation is ended.
+		// This mechanism only works for Honeycomb+ property Animators. Because if we use pre-Honeycomb view
+		// animations and skip the drawing pass, the AnimationListener will not be triggered so
+		// TiAnimationBuilder.isAnimationRunningFor(view) will always return true.
+		if (Build.VERSION.SDK_INT >= TiC.API_LEVEL_JELLY_BEAN) {
+			final OnPreDrawListener preDrawListener = new OnPreDrawListener()
+			{
+				public boolean onPreDraw()
+				{
+					if (TiAnimationBuilder.isAnimationRunningFor(v)) {
+						// Skip the current drawing pass.
+						return false;
+					}
+					try {
+						v.getViewTreeObserver().removeOnPreDrawListener(this);
+					} catch (IllegalStateException e) {
+						if (Log.isDebugModeEnabled()) {
+							Log.w(TAG, "Unable to remove the OnPreDrawListener.", e.getMessage());
+						}
+					}
+					return true;
+				}
+			};
+			v.getViewTreeObserver().addOnPreDrawListener(preDrawListener);
+		}
 	}
 
 	public void forceLayoutNativeView(boolean informParent)