作者 | Kevin_Android
地址 | http://www.jianshu.com/p/65f50b6ecaca
声明 | 本文是 Kevin_Android 原创，已获授权发布，未经原作者允许请勿转载
效果图
本文实现了 Android 中 dialog 的 3D 翻转效果。这里通过一个简单的应用场景记录下。
分析
起初自己的思路是 Activity 进行界面跳转实现旋转效果，网上看了很多，写下来发现效果不对。之后又看到 Google 上面的 Card Flid Animation 效果是这样的。
看着确实不错，然而拿下来 demo 放慢翻转速度后发现，不是我想要的。但是跟我看到的一个 app 里面的效果一样 然后想改成 dialog 试试效果，发现更是不行了。
Card Flid Animation效果如下： 这个是通过Activity来切换Fragment实现的，可以看到区别是翻转时候貌似会变大，其实没用，只是翻转后的视觉问题。
听说 openGl 比较麻烦，并且没有用过。然后就搜了下Rotate3DAnimaitons。搜到了这篇文章http://blog.csdn.net/growing_tree/article/details/50428148所以这篇文章里的实现方法不是我的原创，是参考人家的。在这里感谢这位大神。不过他这个是 activity 里的，我就想要一个 dialog 效果，因为电脑上TIM 的打开红包这个 3D 效果看着不错，其实大同小异，就拿过来改成Dialog。对于 Rotate3DAnimaitons 这篇文章已经很详细了，有需要的可以参考下。
这里也贴下 Rotate3dAnimation 的代码
/** * 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 //起始角度 * @param toDegrees the end angle of the 3D rotation //结束角度 * @param centerX the X center of the 3D rotation //x中轴线 * @param centerY the Y center of the 3D rotation //y中轴线 * @param reverse true if the translation should be reversed, false otherwise//是否反转 */ public Rotate3dAnimation(float fromDegrees, float toDegrees, float centerX, float centerY, float depthZ, boolean reverse) { mFromDegrees = fromDegrees; mToDegrees = toDegrees; mCenterX = centerX; mCenterY = centerY; mDepthZ = depthZ;//Z轴移动的距离，这个来影响视觉效果，可以解决flip animation那个给人看似放大的效果 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(); Log.i("interpolatedTime", interpolatedTime+""); 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); }}dialog实现3D翻转代码
public class MyDialog extends Dialog { @BindView(R.id.et_user_name) EditText etUserName; @BindView(R.id.et_password) EditText etPassword; @BindView(R.id.cb_auto_login) CheckBox cbAutoLogin; @BindView(R.id.tv_forget_pwd) TextView tvForgetPwd; @BindView(R.id.ll_content) LinearLayout llContent; @BindView(R.id.et_email) EditText etEmail; @BindView(R.id.btn_back) Button btnBack; @BindView(R.id.container) RelativeLayout container; private Context context; @BindView(R.id.ll_register) LinearLayout llRegister; //接口回调传递参数 private OnClickListenerInterface mListener; private View view;// private String strContent; private int centerX; private int centerY; private int depthZ = 700;//修改此处可以改变距离来达到你满意的效果 private int duration = 300;//动画时间 private Rotate3dAnimation openAnimation; private Rotate3dAnimation closeAnimation; private boolean isOpen = false; public interface OnClickListenerInterface { /** * 确认, */ void doConfirm(); /** * 取消 */// public void doCancel(); } public MyDialog(Context context) { super(context); this.context = context; } public MyDialog(Context context, String content) { super(context); this.context = context; this.strContent = content; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //去掉系统的黑色矩形边框 getWindow().setBackgroundDrawableResource(android.R.color.transparent); requestWindowFeature(Window.FEATURE_NO_TITLE); init(); } public void init() { LayoutInflater inflater = LayoutInflater.from(context); view = inflater.inflate(R.layout.dialog_my, null); setContentView(view); ButterKnife.bind(this); etPassword.setTypeface(Typeface.DEFAULT); etPassword.setTransformationMethod(new PasswordTransformationMethod()); tvForgetPwd.setOnClickListener(new OnWidgetClickListener()); btnBack.setOnClickListener(new OnWidgetClickListener()); Window dialogWindow = getWindow(); WindowManager.LayoutParams lp = dialogWindow.getAttributes(); DisplayMetrics d = context.getResources().getDisplayMetrics(); // 获取屏幕宽、高用 lp.width = (int) (d.widthPixels * 0.8); // 宽度设置为屏幕的0.8 lp.height = (int) (d.heightPixels * 0.6); // 高度设置为屏幕的0.6 dialogWindow.setAttributes(lp); setCanceledOnTouchOutside(false); setCancelable(true); } public void setClicklistener(OnClickListenerInterface clickListenerInterface) { this.mListener = clickListenerInterface; } private class OnWidgetClickListener implements View.OnClickListener { @Override public void onClick(View v) { int id = v.getId(); switch (id) { case R.id.tv_forget_pwd: startAnimation(); break; case R.id.btn_back: startAnimation(); break; } } } private void startAnimation() { //接口回调传递参数 centerX = container.getWidth() / 2; centerY = container.getHeight() / 2; if (openAnimation == null) { initOpenAnim(); initCloseAnim(); } //用作判断当前点击事件发生时动画是否正在执行 if (openAnimation.hasStarted() && !openAnimation.hasEnded()) { return; } if (closeAnimation.hasStarted() && !closeAnimation.hasEnded()) { return; } //判断动画执行 if (isOpen) { container.startAnimation(openAnimation); } else { container.startAnimation(closeAnimation); } isOpen = !isOpen; } /** *注意旋转角度 */ private void initOpenAnim() { //从0到90度，顺时针旋转视图，此时reverse参数为true，达到90度时动画结束时视图变得不可见， openAnimation = new Rotate3dAnimation(0, 90, centerX, centerY, depthZ, true); openAnimation.setDuration(duration); openAnimation.setFillAfter(true); openAnimation.setInterpolator(new AccelerateInterpolator()); openAnimation.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationEnd(Animation animation) { llRegister.setVisibility(View.GONE); llContent.setVisibility(View.VISIBLE); //从270到360度，顺时针旋转视图，此时reverse参数为false，达到360度动画结束时视图变得可见 Rotate3dAnimation rotateAnimation = new Rotate3dAnimation(270, 360, centerX, centerY, depthZ, false); rotateAnimation.setDuration(duration); rotateAnimation.setFillAfter(true); rotateAnimation.setInterpolator(new DecelerateInterpolator()); container.startAnimation(rotateAnimation); } }); } private void initCloseAnim() { closeAnimation = new Rotate3dAnimation(360, 270, centerX, centerY, depthZ, true); closeAnimation.setDuration(duration); closeAnimation.setFillAfter(true); closeAnimation.setInterpolator(new AccelerateInterpolator()); closeAnimation.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationEnd(Animation animation) { llRegister.setVisibility(View.VISIBLE); llContent.setVisibility(View.GONE); Rotate3dAnimation rotateAnimation = new Rotate3dAnimation(90, 0, centerX, centerY, depthZ, false); rotateAnimation.setDuration(duration); rotateAnimation.setFillAfter(true); rotateAnimation.setInterpolator(new DecelerateInterpolator()); container.startAnimation(rotateAnimation); } }); }}说明：动画部分的代码是拿的搜的的那篇文章的。
demo下载
http://download.csdn.net/download/student9128/9938049
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