android自定义动画注意是继承Animation，重写里面的initialize和applyTransformation，在initialize方法做一些初始化的工作，在applyTransformation方法进行相应的轨阵变化即可！
直接上demo！
public class Rotate3dAnimation extends Animation {
// 开始角度 private final float mFromDegrees; // 结束角度 private final float mToDegrees; // 中心点 private final float mCenterX; private final float mCenterY; private final float mDepthZ; // 是否需要扭曲 private final boolean mReverse; // 摄像头 private Camera mCamera;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(); }// 生成Transformation
@Override protected void applyTransformation(float interpolatedTime, Transformation t) { final float fromDegrees = mFromDegrees; // 生成中间角度 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); camera.rotateY(mCenterY); } else { //camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime)); camera.rotateY(-mCenterY); } camera.rotateY(degrees); // 取得变换后的矩阵 camera.getMatrix(matrix); camera.restore(); matrix.preTranslate(-centerX, -centerY); matrix.postTranslate(centerX, centerY); }}这是一个模仿3D旋转动画的效果，下面是调用方法，mSecondMenuLayout指的是要开始动画的view
/**
* * @param start 开始角度 * @param end 结束角度 */ private void applyRotation(float start, float end) {// 计算中心点
final float centerX = mSecondMenuLayout.getWidth() / 2.0f; // final float centerY = mSecondMenuLayout.getHeight() /2.0f; final Rotate3dAnimation rotation = new Rotate3dAnimation(start, end, centerX, 360, 310.0f, true); //设置动画的持续时间 rotation.setDuration(1000); //设置动画完成后是否保留原样 rotation.setFillAfter(false); //设置动画插补器 rotation.setInterpolator(new AccelerateDecelerateInterpolator()); //设置动画监听 rotation.setAnimationListener(mAnimListener); mSecondMenuLayout.startAnimation(rotation); }