Why doesn't setVisibility work after a view is animated?

Question

Why doesn't the textView become invisible?

Here is my layout xml:

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical" >      <TextView     android:id="@+id/tvRotate"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="Rotate Me" /> </LinearLayout> 

..and here is my activity:

public class RotateMeActivity extends Activity {     @Override     public void onCreate(Bundle savedInstanceState)      {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);         TextView tvRotate = (TextView) findViewById(R.id.tvRotate);          RotateAnimation r = new RotateAnimation(0, 180, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);         r.setDuration(0);         r.setFillAfter(true);         tvRotate.startAnimation(r);         tvRotate.setVisibility(View.INVISIBLE);     } } 

My goal is to rotate a view and then be able to hide and show it in code by setting setVisibility. The following works, but setRotation is available only in API Level 11. I need a way to do it in API Level 10.

tvRotate.setRotation(180);//instead of the RotateAnimation, only works in API Level 11 tvRotate.setVisibility(View.INVISIBLE); 

Answer 1

For me calling clearAnimation of the View fixed the problem. In my case I wanted to set the View back to its original position after doing a translation with fillAfter set to true.

Answer 2

All the animations (before android 3.0) are actually applied to a bitmap which is a snapshot of your view instead of on your original view. When you are setting the fill after to true this actually means that the bitmap will continue to be displayed on the screen instead of your view. This is the reason why the visibility won't change upon using setVisibility and also the reason why your view will not be receiving touch events in its new (rotated) bounds. (but since you're rotating on 180 degrees that's not an issue).