为Viewgourp内组件添加动画

package com.loaderman.customviewdemo;

import android.animation.Keyframe;
import android.animation.LayoutTransition;
import android.animation.ObjectAnimator;
import android.animation.PropertyValuesHolder;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {
    private LinearLayout linearLayoutContainer;

    private int i = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        linearLayoutContainer = (LinearLayout) findViewById(R.id.linearlayoutcontainer);

//        LayoutTransition transition = new LayoutTransition();
//        //入场动画:view在这个容器中消失时触发的动画
//        ObjectAnimator animIn = ObjectAnimator.ofFloat(null, "rotationY", 0f, 360f, 0f);
//        transition.setAnimator(LayoutTransition.APPEARING, animIn);
//
//        //出场动画:view显示时的动画
//        ObjectAnimator animOut = ObjectAnimator.ofFloat(null, "rotation", 0f, 90f, 0f);
//        transition.setAnimator(LayoutTransition.DISAPPEARING, animOut);
//
//        PropertyValuesHolder pvhLeft = PropertyValuesHolder.ofInt("left", 0, 0);
//        PropertyValuesHolder pvhTop = PropertyValuesHolder.ofInt("top", 0, 0);
//        PropertyValuesHolder pvhScaleX = PropertyValuesHolder.ofFloat("scaleX", 1f, 0f, 1f);
//        Animator changeAppearAnimator
//                = ObjectAnimator.ofPropertyValuesHolder(linearLayoutContainer, pvhLeft, pvhTop, pvhScaleX);
//        transition.setAnimator(LayoutTransition.CHANGE_APPEARING, changeAppearAnimator);

        LayoutTransition transition = new LayoutTransition();
        PropertyValuesHolder outLeft = PropertyValuesHolder.ofInt("left", 0, 0);
        PropertyValuesHolder outTop = PropertyValuesHolder.ofInt("top", 0, 0);

        Keyframe frame0 = Keyframe.ofFloat(0f, 0);
        Keyframe frame1 = Keyframe.ofFloat(0.1f, -20f);
        Keyframe frame2 = Keyframe.ofFloat(0.2f, 20f);
        Keyframe frame3 = Keyframe.ofFloat(0.3f, -20f);
        Keyframe frame4 = Keyframe.ofFloat(0.4f, 20f);
        Keyframe frame5 = Keyframe.ofFloat(0.5f, -20f);
        Keyframe frame6 = Keyframe.ofFloat(0.6f, 20f);
        Keyframe frame7 = Keyframe.ofFloat(0.7f, -20f);
        Keyframe frame8 = Keyframe.ofFloat(0.8f, 20f);
        Keyframe frame9 = Keyframe.ofFloat(0.9f, -20f);
        Keyframe frame10 = Keyframe.ofFloat(1, 0);

        PropertyValuesHolder mPropertyValuesHolder = PropertyValuesHolder.ofKeyframe("rotation", frame0, frame1, frame2, frame3, frame4, frame5, frame6, frame7, frame8, frame9, frame10);
        ObjectAnimator mObjectAnimatorChangeDisAppearing = ObjectAnimator.ofPropertyValuesHolder(this, outLeft, outTop, mPropertyValuesHolder);
        transition.setAnimator(LayoutTransition.CHANGE_DISAPPEARING, mObjectAnimatorChangeDisAppearing);

        transition.addTransitionListener(new LayoutTransition.TransitionListener() {
            public void startTransition(LayoutTransition transition, ViewGroup container, View view, int transitionType) {
                Log.d("loaderman", "start:" + "transitionType:" + transitionType + "count:" + container.getChildCount() + "view:" + view.getClass().getName());
            }

            public void endTransition(LayoutTransition transition, ViewGroup container, View view, int transitionType) {
                Log.d("loaderman", "end:" + "transitionType:" + transitionType + "count:" + container.getChildCount() + "view:" + view.getClass().getName());
            }
        });

        linearLayoutContainer.setLayoutTransition(transition);
        findViewById(R.id.add_btn).setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                addButtonView();
            }
        });

        findViewById(R.id.remove_btn).setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                removeButtonView();
            }
        });

    }

    private void addButtonView() {
        i++;
        Button button = new Button(this);
        button.setText("button" + i);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        button.setLayoutParams(params);
        linearLayoutContainer.addView(button, 0);
    }

    private void removeButtonView() {
        if (i > 0) {
            linearLayoutContainer.removeViewAt(0);
        }
        i--;
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/add_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="添加控件"/>

        <Button
            android:id="@+id/remove_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="移除控件"/>
    </LinearLayout>


    <LinearLayout
        android:id="@+id/linearlayoutcontainer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:animateLayoutChanges="false"
        android:orientation="vertical"/>

</LinearLayout>

效果: