模仿系统apiDemos里的范例，去掉了listview，修改为点击图片后，更新图片并播放3d翻转动画。
代码：
package com.example.aexh_11_transition3d;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.View;import android.view.ViewGroup;import android.view.View.OnClickListener;import android.view.animation.AccelerateInterpolator;import android.view.animation.Animation;import android.view.animation.DecelerateInterpolator;import android.view.animation.Animation.AnimationListener;import android.widget.ImageView;public class MainActivity extends Activity implements OnClickListener{ /** * 仿照系统的范例，修改成点击图片播放动画更新图片。 * apiDemos范例： com.example.android.apis.animation * Transition3d */ private static final int[] PHOTOS_RESOURCES = new int[] { R.drawable.photo1, R.drawable.photo2, R.drawable.photo3, R.drawable.photo4, R.drawable.photo5, R.drawable.photo6 }; private ImageView mImageview; private ViewGroup mLayout; private int mPosition; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mImageview = (ImageView) findViewById(R.id.p_w_picpathView1); mImageview.setOnClickListener(this); mLayout = (ViewGroup) findViewById(R.id.p_w_picpath_layout);// ViewGroup是所有layout的父类 /** * 下面这句应该是用来压缩大图的，没加上这句运行正常 */ // Since we are caching large views, we want to keep their cache // between each animation mLayout.setPersistentDrawingCache(ViewGroup.PERSISTENT_ANIMATION_CACHE); } @Override public void onClick(View v) { if (v.getId() == R.id.p_w_picpathView1) { // Pre-load the p_w_picpath then start the animation mPosition++; applyRotation(0, 90); mImageview.setImageResource(PHOTOS_RESOURCES[mPosition % 6]); } } /** * Setup a new 3D rotation on the container view. * * @param position * the item that was clicked to show a picture, or -1 to show the * list * @param start * the start angle at which the rotation must begin * @param end * the end angle of the rotation */ private void applyRotation(float start, float end) { // Find the center of the container final float centerX = mLayout.getWidth() / 2.0f; final float centerY = mLayout.getHeight() / 2.0f; // Create a new 3D rotation with the supplied parameter // The animation listener is used to trigger the next animation final Rotate3dAnimation rotation = new Rotate3dAnimation(start, end, centerX, centerY, 310.0f, true); rotation.setDuration(500); rotation.setFillAfter(true); rotation.setInterpolator(new AccelerateInterpolator()); // 监听动画 rotation.setAnimationListener(new AnimationListener() { @Override public void onAnimationStart(Animation animation) { } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationEnd(Animation animation) { mLayout.post(mAaction);// 刷新layout这个View } }); // 启动动画 mLayout.startAnimation(rotation); } Runnable mAaction = new Runnable() { @Override public void run() { final float centerX = mLayout.getWidth() / 2.0f; final float centerY = mLayout.getHeight() / 2.0f; Rotate3dAnimation rotation; // mImageView.requestFocus(); rotation = new Rotate3dAnimation(90, 180, centerX, centerY, 310.0f, false); rotation.setDuration(500); rotation.setFillAfter(true); rotation.setInterpolator(new DecelerateInterpolator()); mLayout.startAnimation(rotation); } };} 系统实现的动画方法：
package com.example.aexh_11_transition3d;/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */import android.view.animation.Animation;import android.view.animation.Transformation;import android.graphics.Camera;import android.graphics.Matrix;/** * An animation that rotates the view on the Y axis between two specified * angles. This animation also adds a translation on the Z axis (depth) to * improve the effect. */public class Rotate3dAnimation extends Animation{ private final float mFromDegrees; private final float mToDegrees; private final float mCenterX; private final float mCenterY; private final float mDepthZ; private final boolean mReverse; private Camera mCamera; /** * Creates a new 3D rotation on the Y axis. The rotation is defined by its * start angle and its end angle. Both angles are in degrees. The rotation * is performed around a center point on the 2D space, definied by a pair of * X and Y coordinates, called centerX and centerY. When the animation * starts, a translation on the Z axis (depth) is performed. The length of * the translation can be specified, as well as whether the translation * should be reversed in time. * * @param fromDegrees * the start angle of the 3D rotation * @param toDegrees * the end angle of the 3D rotation * @param centerX * the X center of the 3D rotation * @param centerY * the Y center of the 3D rotation * @param reverse * true if the translation should be reversed, false otherwise */ public Rotate3dAnimation(float fromDegrees, float toDegrees, float centerX, float centerY, float depthZ, boolean reverse) { mFromDegrees = fromDegrees; mToDegrees = toDegrees; mCenterX = centerX; mCenterY = centerY; mDepthZ = depthZ; mReverse = reverse; } @Override public void initialize(int width, int height, int parentWidth, int parentHeight) { super.initialize(width, height, parentWidth, parentHeight); mCamera = new Camera(); } @Override protected void applyTransformation(float interpolatedTime, Transformation t) { final float fromDegrees = mFromDegrees; float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime); final float centerX = mCenterX; final float centerY = mCenterY; final Camera camera = mCamera; final Matrix matrix = t.getMatrix(); camera.save(); if (mReverse) { camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime); } else { camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime)); } camera.rotateY(degrees); camera.getMatrix(matrix); camera.restore(); matrix.preTranslate(-centerX, -centerY); matrix.postTranslate(centerX, centerY); }}