<?xml version="1.0" encoding="utf-8"?><FrameLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/root"    android:layout_width="match_parent"    android:layout_height="match_parent">    <ImageView        android:id="@+id/iv_a"        android:src="@drawable/stefanie01"        android:scaleType="fitXY"        android:layout_width="match_parent"        android:layout_height="match_parent"/>    <ImageView        android:id="@+id/iv_b"        android:src="@drawable/stefanie02"        android:scaleType="fitXY"        android:layout_width="match_parent"        android:layout_height="match_parent"/></FrameLayout>

 1 package com.lyp.www.a2d; 2  3 import android.support.v7.app.AppCompatActivity; 4 import android.os.Bundle; 5 import android.view.View; 6 import android.view.animation.Animation; 7 import android.view.animation.ScaleAnimation; 8 import android.widget.FrameLayout; 9 import android.widget.ImageView;10 11 public class MainActivity extends AppCompatActivity {12 13     private FrameLayout flRoot;14     private ImageView ivA;15     private ImageView ivB;16 17     boolean flag = true;18 19     private ScaleAnimation anim1=20             new ScaleAnimation(0,1,1,1, Animation.RELATIVE_TO_PARENT,0.5f,Animation.RELATIVE_TO_PARENT,0.5f);21     private ScaleAnimation anim2=22             new ScaleAnimation(1,0,1,1, Animation.RELATIVE_TO_PARENT,0.5f,Animation.RELATIVE_TO_PARENT,0.5f);23 24     @Override25     protected void onCreate(Bundle savedInstanceState) {26         super.onCreate(savedInstanceState);27         setContentView(R.layout.activity_main);28 29         initView();30         flRoot.setOnClickListener(new View.OnClickListener() {31             @Override32             public void onClick(View v) {33                 if (flag) {34                     ivA.startAnimation(anim2);35                     flag=false;36                 }else {37                     ivB.startAnimation(anim2);38                     flag=true;39                 }40             }41         });42 43     }44 45     private void showImageA() {46         ivB.setVisibility(View.INVISIBLE);47         ivA.setVisibility(View.VISIBLE);48     }49 50     private void showImageB() {51         ivA.setVisibility(View.INVISIBLE);52         ivB.setVisibility(View.VISIBLE);53     }54 55     private void initView() {56         flRoot = (FrameLayout) findViewById(R.id.root);57         ivA = (ImageView) findViewById(R.id.iv_a);58         ivB = (ImageView) findViewById(R.id.iv_b);59         anim1.setDuration(600);60         anim2.setDuration(600);61 62         anim2.setAnimationListener(new Animation.AnimationListener() {63             @Override64             public void onAnimationStart(Animation animation) {65 66             }67 68             @Override69             public void onAnimationEnd(Animation animation) {70                 if (flag){71                     ivB.setAnimation(null);72                     showImageA();73                     ivA.startAnimation(anim1);74                 }else {75                     ivA.setAnimation(null);76                     showImageB();77                     ivB.startAnimation(anim1);78                 }79             }80 81             @Override82             public void onAnimationRepeat(Animation animation) {83 84             }85         });86     }87 }