fix(android): handle "attached to window" event in TiUIFragment

prevent crash when using ti.map inside a ListView

ref TIMOB-28583 fix tidev#13243

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

@@ -43,16 +43,21 @@ public boolean dispatchTouchEvent(MotionEvent ev)
 				{
 					return interceptTouchEvent(ev) || super.dispatchTouchEvent(ev);
 				}
+
+				@Override
+				protected void onAttachedToWindow()
+				{
+					super.onAttachedToWindow();
+					FragmentManager manager = ((FragmentActivity) getContext()).getSupportFragmentManager();
+					FragmentTransaction transaction = manager.beginTransaction();
+					transaction.runOnCommit(onCommitRunnable);
+					fragment = createFragment();
+					transaction.add(getId(), fragment);
+					transaction.commitAllowingStateLoss();
+				}
 			};
 			container.setId(View.generateViewId());
 			setNativeView(container);
-
-			FragmentManager manager = ((FragmentActivity) activity).getSupportFragmentManager();
-			FragmentTransaction transaction = manager.beginTransaction();
-			transaction.runOnCommit(onCommitRunnable);
-			fragment = createFragment();
-			transaction.add(container.getId(), fragment);
-			transaction.commitAllowingStateLoss();
 		}
 	}
 
@@ -68,6 +73,9 @@ public void run()
 
 	public void realizeFragmentViews()
 	{
+		if (childrenToRealize == null) {
+			return;
+		}
 		for (TiUIView child : childrenToRealize) {
 			// Draw the views
 			((ViewGroup) getNativeView()).addView(child.getOuterView(), child.getLayoutParams());