Android利用Camera实现图片的旋转动画

MainActivity如下:

    package cc.testrotatephoto;        import android.os.Bundle;        import android.view.View;        import android.view.View.OnClickListener;        import android.view.animation.AccelerateInterpolator;        import android.view.animation.Animation;        import android.view.animation.Animation.AnimationListener;        import android.widget.Button;        import android.widget.ImageView;        import android.widget.RelativeLayout;        import android.app.Activity;        /**        * Demo描述:        * 利用Camera实现图片的旋转动画        *         * 注意事项:        * 1 Rotate3dAnimation在APIDemo中的位置Views/Animation/3D Transition        * 2 待有空时候再仔细研究Rotate3dAnimation        *         * 参考资料:        * 1 http://blog.csdn.net/guolin_blog/article/details/10766017        * 2 http://blog.csdn.net/mapdigit/article/details/7804654        * 3 http://wang-peng1.iteye.com/blog/572886        *   Thank you very much        */        public class MainActivity extends Activity {            private RelativeLayout mRelativeLayout;            private ImageView mImageView;            private Button mButton;            private int count=0;            @Override            protected void onCreate(Bundle savedInstanceState) {                super.onCreate(savedInstanceState);                setContentView(R.layout.main);                init();            }                        private void init(){                mRelativeLayout=(RelativeLayout) findViewById(R.id.relativeLayout);                mImageView=(ImageView) findViewById(R.id.imageView);                mButton=(Button) findViewById(R.id.button);                mButton.setOnClickListener(new OnClickListener() {                    @Override                    public void onClick(View view) {                        float centerX = mRelativeLayout.getWidth() / 2f;                        float centerY = mRelativeLayout.getHeight() / 2f;                        // 构建3D旋转动画对象,旋转角度为0到90度                        Rotate3dAnimation rotation = new Rotate3dAnimation(0, 90, centerX, centerY,310.0f, true);                        // 动画持续时间500毫秒                        rotation.setDuration(500);                        // 动画完成后保持完成状态                        rotation.setFillAfter(true);                        rotation.setInterpolator(new AccelerateInterpolator());                        // 设置动画的监听器                        if (count%2==0) {                            rotation.setAnimationListener(new RotateToTheSecondImageViewAnimationListener());                        }else{                            rotation.setAnimationListener(new RotateToTheFirstImageViewAnimationListener());                        }                        mRelativeLayout.startAnimation(rotation);                        count++;                    }                });            }                                    class RotateToTheFirstImageViewAnimationListener implements AnimationListener {                @Override                public void onAnimationStart(Animation animation) {                }                                @Override                public void onAnimationEnd(Animation animation) {                    mImageView.setImageResource(R.drawable.c);                                        // 获取布局的中心点位置，作为旋转的中心点                    float centerX = mRelativeLayout.getWidth() / 2f;                    float centerY = mRelativeLayout.getHeight() / 2f;                                        // 构建3D旋转动画对象,旋转角度为90到0度                    Rotate3dAnimation rotation = new Rotate3dAnimation(90, 0, centerX, centerY,310.0f, false);                    // 动画持续时间500毫秒                    rotation.setDuration(500);                    // 动画完成后保持完成状态                    rotation.setFillAfter(true);                    rotation.setInterpolator(new AccelerateInterpolator());                    mRelativeLayout.startAnimation(rotation);                }                        @Override                public void onAnimationRepeat(Animation animation) {                }                    }                                    class RotateToTheSecondImageViewAnimationListener implements AnimationListener {                        @Override                public void onAnimationStart(Animation animation) {                }                                        @Override                public void onAnimationEnd(Animation animation) {                    //动画完成后展示另外的图片                    mImageView.setImageResource(R.drawable.b);                                        // 获取布局的中心点位置,作为旋转的中心点                    float centerX = mRelativeLayout.getWidth() / 2f;                    float centerY = mRelativeLayout.getHeight() / 2f;                    // 构建3D旋转动画对象,旋转角度为270到360度                    Rotate3dAnimation rotation = new Rotate3dAnimation(270, 360, centerX, centerY,310.0f, false);                    // 动画持续时间500毫秒                    rotation.setDuration(500);                    // 动画完成后保持完成状态                    rotation.setFillAfter(true);                    rotation.setInterpolator(new AccelerateInterpolator());                    mRelativeLayout.startAnimation(rotation);                }                        @Override                public void onAnimationRepeat(Animation animation) {                }                    }                }  

    package cc.testrotatephoto;                import android.graphics.Camera;        import android.graphics.Matrix;        import android.view.animation.Animation;        import android.view.animation.Transformation;        /**        * 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 isReverse;            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;                isReverse = 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 (isReverse) {                    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);            }        }  

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"        xmlns:tools="http://schemas.android.com/tools"        android:id="@+id/relativeLayout"        android:layout_width="match_parent"        android:layout_height="match_parent" >            <ImageView            android:id="@+id/imageView"            android:layout_width="fill_parent"            android:layout_height="350dip"            android:src="@drawable/c" />            <Button            android:id="@+id/button"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_below="@id/imageView"            android:layout_centerHorizontal="true"            android:layout_marginTop="30dip"            android:text="button" />        </RelativeLayout>