android - Rotation animation is not spinning the asset in center point -


i'm trying rotate round button when pressed.my problem button doesn't rotate around it's own centre. followed other examples outcome same. here code:

rotate.xml: 

?xml version="1.0" encoding="utf-8"?> 

<rotate     android:duration="1500"     android:interpolator="@android:anim/linear_interpolator"     android:pivotx="50%"     android:pivoty="50%"     android:repeatcount="infinite"     android:repeatmode="restart"     android:todegrees="360" />

and in class i'm using animation:

animation animrotate = animationutils.loadanimation(getcontext(), r.animator.rotate);  @override public boolean ontouchevent(motionevent event) {  log.e(tag, "event:::" + event.getaction());  if (event.getaction() == motionevent.action_down) {      view.startanimation(animrotate);    view.setbackgroundresource(r.drawable.some_asset); } else if (event.getaction() == motionevent.action_up ) {     view.clearanimation();    view.setbackgroundresource(r.drawable.some_asset); }

thank you!

a simple way rotate view

matrix matrix = new matrix(); view.setscaletype(scaletype.matrix);   //required  matrix.postrotate((float) angle, pivx, pivy); view.setimagematrix(matrix);

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