LayoutAnimation实现ListView的子View淡入淡出效果效果图

效果图

一、布局

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_second"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@android:color/holo_blue_light"    android:orientation="vertical"    tools:context="karry.example.com.test.SecondActivity">    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="start"        android:text="显示ListView数据" />    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="stop"        android:text="隐藏ListView数据" />    <ListView        android:id="@+id/lv"        android:layout_width="100dp"        android:layout_height="wrap_content"        android:layout_gravity="right|bottom"        android:orientation="vertical"></ListView></LinearLayout>
二、在anim文件夹下新建slide_left.xmlm,这个动画实现ListView显示子View时的动画效果
<set xmlns:android="http://schemas.android.com/apk/res/android"    android:interpolator="@android:anim/accelerate_interpolator">    <translate        android:duration="500"        android:fromXDelta="5%p"        android:toXDelta="-2%p" />    <alpha        android:duration="500"        android:fromAlpha="0"        android:toAlpha="1"></alpha></set>
在anim文件夹下新建slide_right.xml，这个动画实现隐藏子View时的动画效果
<set xmlns:android="http://schemas.android.com/apk/res/android"    android:interpolator="@android:anim/accelerate_interpolator">    <translate        android:duration="300"        android:fromXDelta="0%p"        android:toXDelta="5%p" />    <alpha        android:duration="300"        android:fromAlpha="1"        android:toAlpha="0"></alpha></set> 
三、MainActivity中ListView数据的添加，以及点击事件的完成：
package karry.example.com.test;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.Gravity;import android.view.View;import android.view.ViewGroup;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.view.animation.LayoutAnimationController;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.TextView;import butterknife.Bind;import butterknife.ButterKnife;public class SecondActivity extends AppCompatActivity {    @Bind(R.id.lv)    ListView lv;    PRivate MyAdapter adapter = new MyAdapter();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_second);        ButterKnife.bind(this);        lv.setAdapter(adapter);    }    //隐藏ListView数据的点击事件    public void stop(View v) {        Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_right);        LayoutAnimationController controller = new LayoutAnimationController(animation);        controller.setDelay(0.2f);//表示在第一个子View动画执行到20%时，第二个子View的动画开始执行        controller.setOrder(LayoutAnimationController.ORDER_NORMAL);//顺序显示子View的动画        lv.setLayoutAnimation(controller);        lv.startLayoutAnimation();        animation.setFillAfter(true);    }    //显示ListView数据的点击事件    public void start(View v) {        Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_left);        LayoutAnimationController controller = new LayoutAnimationController(animation);        controller.setDelay(0.2f);        controller.setOrder(LayoutAnimationController.ORDER_REVERSE);//逆序显示子View的动画        lv.setLayoutAnimation(controller);        lv.startLayoutAnimation();        animation.setFillAfter(false);    }    public void clear(View v) {        lv.setVisibility(View.INVISIBLE);    }    class MyAdapter extends BaseAdapter {        @Override        public int getCount() {            return 4;        }        @Override        public Object getItem(int i) {            return null;        }        @Override        public long getItemId(int i) {            return i;        }        @Override        public View getView(int i, View view, ViewGroup viewGroup) {            TextView textView = new TextView(SecondActivity.this);            textView.setText("按钮" + i);            textView.setTextSize(DentisyUtils.sp2px(SecondActivity.this, 18));            textView.setGravity(Gravity.CENTER);            ListView.LayoutParams param = new ListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);            textView.setLayoutParams(param);            return textView;        }    }}