Code completion in animator1.xml for android:^duration="2000":
android:propertyName : Name of the property being animated.  [string]
android:interpolator : Defines the interpolator used to smooth the animation movement  in time.  [reference]
android:duration : Amount of time (in milliseconds) for the animation to run.  [integer]
android:startOffset : Delay in milliseconds before the animation runs, once start time  is reached.  [integer]
android:repeatCount : Defines how many times the animation should repeat.  [integer, enum]
android:repeatMode : Defines the animation behavior when it reaches the end and the  repeat count is greater than 0 or infinite.  [enum]
android:valueFrom : Value the animation starts from.  [integer, float, color, dimension]
android:valueTo : Value the animation animates to.  [integer, float, color, dimension]
android:valueType : The type of valueFrom and valueTo.  [enum]