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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。 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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