1 public class Rotate3dAnimation extends Animation {  　　　　// 开始角度
 2     private final float mFromDegrees;  　　　　// 结束角度
 3     private final float mToDegrees;  　　　　// 旋转的x坐标
 4     private final float mCenterX;  　　　　// 旋转的y坐标
 5     private final float mCenterY;  　　　　// 旋转的z坐标
 6     private final float mDepthZ;  　　　　// 是否扭曲
 7     private final boolean mReverse;
 8     private Camera mCamera;
 9
10     /**
11      * Creates a new 3D rotation on the Y axis. The rotation is defined by its
12      * start angle and its end angle. Both angles are in degrees. The rotation
13      * is performed around a center point on the 2D space, definied by a pair
14      * of X and Y coordinates, called centerX and centerY. When the animation
15      * starts, a translation on the Z axis (depth) is performed. The length
16      * of the translation can be specified, as well as whether the translation
17      * should be reversed in time.
18      *
19      * @param fromDegrees the start angle of the 3D rotation
20      * @param toDegrees the end angle of the 3D rotation
21      * @param centerX the X center of the 3D rotation
22      * @param centerY the Y center of the 3D rotation
23      * @param reverse true if the translation should be reversed, false otherwise
24      */
25     public Rotate3dAnimation(float fromDegrees, float toDegrees,
26             float centerX, float centerY, float depthZ, boolean reverse) {
27         mFromDegrees = fromDegrees;  　　
28         mToDegrees = toDegrees;
29         mCenterX = centerX;
30         mCenterY = centerY;
31         mDepthZ = depthZ;
32         mReverse = reverse;
33     }
34
35     @Override
36     public void initialize(int width, int height, int parentWidth, int parentHeight) {
37         super.initialize(width, height, parentWidth, parentHeight);
38         mCamera = new Camera();
39     }
40
41     @Override
42     protected void applyTransformation(float interpolatedTime, Transformation t) {
43         final float fromDegrees = mFromDegrees;
44         float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);
45
46         final float centerX = mCenterX;
47         final float centerY = mCenterY;
48         final Camera camera = mCamera;
49
50         final Matrix matrix = t.getMatrix();
51
52         camera.save();
53         if (mReverse) {
54             camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime);
55         } else {
56             camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime));
57         }
58         camera.rotateY(degrees);
59         camera.getMatrix(matrix);
60         camera.restore();
61
62         matrix.preTranslate(-centerX, -centerY);
63         matrix.postTranslate(centerX, centerY);
64     }
65 }  

 1  img = (ImageView) view.findViewById(R.id.img);
 2         img.setOnClickListener(new View.OnClickListener() {
 3             @Override
 4             public void onClick(View v) {
 5                 if (!isFront){
 6                     applyRotation(0, 180);
 7                     isFront = true;
 8                 }else {
 9                     applyRotation(180, 360);
10                     isFront = false;
11                 }
12             }
13         });
14
15  private void applyRotation(float start, float end) {
16         // 计算中心点
17         final float centerX = img.getWidth() / 2.0f;
18         final float centerY = img.getHeight() / 2.0f;
19         final Rotate3dAnimation rotation = new Rotate3dAnimation(start, end,
20                 centerX, centerY, 0f, true);
21         rotation.setDuration(1000);
22         rotation.setFillAfter(true);
23         rotation.setInterpolator(new AccelerateInterpolator());
24         // 设置监听
25         rotation.setAnimationListener(new DisplayNextView());
26         img.startAnimation(rotation);
27         test.startAnimation(rotation);
28         test.postDelayed(new Runnable() {
29             @Override
30             public void run() {
31                 if (isFront){
32                     test.setText("我是大帝");
33                 }else{
34                     test.setText("世界你好");
35                 }
36             }
37         },700);
38     }
39     private final class DisplayNextView implements Animation.AnimationListener {
40         public void onAnimationStart(Animation animation) {
41         }
42         // 动画结束
43         public void onAnimationEnd(Animation animation) {
44
45         }
46
47         public void onAnimationRepeat(Animation animation) {
48         }
49     }