摩天輪動畫

fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:tools="http://schemas.android.com/tools"
	android:layout_width="match_parent"
	android:layout_height="match_parent"
	tools:context="net.polaris.fragment.QrCodeHistoryFragment">

	<RelativeLayout
		android:id="@+id/parent"
		android:layout_centerInParent="true"
		android:layout_width="200dp"
		android:layout_height="30dp"
		android:background="#F00">

		<ImageView
			android:id="@+id/child"
			android:layout_width="20dp"
			android:layout_height="20dp"
			android:layout_margin="5dp"
			android:layout_alignParentRight="true"
			android:layout_centerVertical="true"
			android:background="#0CC"/>
	</RelativeLayout>

</RelativeLayout>

rotate_clock.xml

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
		android:duration="2000"
		android:fromDegrees="0"
		android:interpolator="@android:anim/linear_interpolator"
		android:pivotX="50%"
		android:pivotY="50%"
		android:repeatCount="infinite"
		android:toDegrees="359" />

rotate_reverse.xml

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
		android:duration="2000"
		android:fromDegrees="360"
		android:interpolator="@android:anim/linear_interpolator"
		android:pivotX="50%"
		android:pivotY="50%"
		android:repeatCount="infinite"
		android:toDegrees="1" />

TestFragment.java

// ignore import

public class TestFragment extends Fragment
{

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
	{
		return inflater.inflate(R.layout.fragment, container, false);
	}

	@Override
	public void onViewCreated(View view, Bundle savedInstanceState)
	{
		View parent = view.findViewById(R.id.parent);
		View child = view.findViewById(R.id.child);
		Animation clock = AnimationUtils.loadAnimation(getActivity(), R.anim.rotate_clock);
		Animation reverse = AnimationUtils.loadAnimation(getActivity(), R.anim.rotate_reverse);
		parent.startAnimation(clock);
		child.startAnimation(reverse);
	}
}