1  @Override 2  public View onCreateView(LayoutInflater inflater, ViewGroup container, 3        Bundle savedInstanceState) { 4    View rootView = inflater.inflate(R.layout.fragment_main, container, false); 5    rootView.findViewById(R.id.btnAnimMe).setOnClickListener(new View.OnClickListener() { 6    @Override 7    public void onClick(View arg0) { 8        arg0.startAnimation(AnimationUtils.loadAnimation(getActivity(), R.anim.aa)); 9    }10    });11    return rootView;12  }

 1 <?xml version="1.0" encoding="utf-8"?> 2 <!--     3     fromAlpha:开始时透明度    4     toAlpha： 结束时透明度    5     duration：动画持续时间  6 -->   7 <alpha xmlns:android="http://schemas.android.com/apk/res/android" 8     android:fromAlpha="0" 9     android:toAlpha="1"10     android:duration="1000" >11 </alpha>