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btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Animation animation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.scalerotate);
animation.setDuration(10000);
btn.startAnimation(animation);
}
});
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
>
<scale
android:fromXScale="1.0"
android:toXScale="3.0"
android:fromYScale="1.0"
android:toYScale="3.0"
/>
<rotate
android:fromDegrees="0.0"
android:toDegrees="360.0"/>
</set>