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渐变动画alpha animation和位移动画translate animation 为ListView的子视图添加动画效果。
mListView = (ListView) findViewById(R.id.list_view);AnimationSet set = new AnimationSet(true);Animation an = new AlphaAnimation(0.0f, 1.0f);an.setDuration(1000);set.addAnimation(an);an = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,0.0f, Animation.RELATIVE_TO_SELF, -1.0f, Animation.RELATIVE_TO_SELF, 0.0f);an.setDuration(1000);set.addAnimation(an);LayoutAnimationController controller = new LayoutAnimationController(set, 0.5f);mListView.setLayoutAnimation(controller);String[] strs = {"1", "2", "3", "4", "5", "6", "7"};ArrayAdapter<String> adapter = new ArrayAdapter<>(this,android.R.layout.simple_expandable_list_item_1, strs);mListView.setAdapter(adapter);
步骤:
1.获取ListView的引用
2.创建默认动画集合对象
3.创建透明度渐变动画
4.创建位移动画
5.创建LayoutAnimationController对象并设置子视图动画系哦啊过持续时间
6.将LayoutAnimationController对象设置到ListView中
7.ListView设置Adapter
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