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;@Overrideprotected 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() {@Overridepublic 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 {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic 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);}@Overridepublic void onAnimationRepeat(Animation animation) {}}class RotateToTheSecondImageViewAnimationListener implements AnimationListener {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic 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);}@Overridepublic void onAnimationRepeat(Animation animation) {}}}

Rotate3dAnimation如下:

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>