图片3D浏览的Demo

这是个图片浏览的例子; 
 
刚在群里一个家伙给提供的思路: 
1.Activity类Rotate.java文件 

package cn.com;

import android.app.Activity;
import android.os.Bundle;

import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.ImageView;

public class Rotate extends Activity {
    GestureDetector gesture;

    int mCenterX = 160;
    int mCenterY = 0;

    ImageView mImageView1;
    ImageView mImageView2;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        FlingGuest sg = new FlingGuest(this);
        gesture = new GestureDetector(sg);

        mImageView1 = (ImageView) findViewById(R.id.image1);
        mImageView2 = (ImageView) findViewById(R.id.image2);
    }

    public void leftMoveHandle() {
        Rotate3d leftAnimation = new Rotate3d(0, -90, 0, 0, mCenterX, mCenterY);
        Rotate3d rightAnimation = new Rotate3d(90, 0, 0.0f, 0.0f, mCenterX,
                mCenterY);

        leftAnimation.setFillAfter(true);
        leftAnimation.setDuration(1000);
        rightAnimation.setFillAfter(true);
        rightAnimation.setDuration(1000);

        mImageView1.startAnimation(leftAnimation);
        mImageView2.startAnimation(rightAnimation);
    }

    public void rightMoveHandle() {
        Rotate3d leftAnimation = new Rotate3d(0, 90, 0, 0, mCenterX, mCenterY);
        Rotate3d rightAnimation = new Rotate3d(-90, 0, 0.0f, 0.0f, mCenterX,
                mCenterY);

        leftAnimation.setFillAfter(true);
        leftAnimation.setDuration(1000);
        rightAnimation.setFillAfter(true);
        rightAnimation.setDuration(1000);

        mImageView1.startAnimation(rightAnimation);
        mImageView2.startAnimation(leftAnimation);
    }

    // called automatically, any screen action will Triggered it
    public boolean onTouchEvent(MotionEvent me) {
        return gesture.onTouchEvent(me);
    }
}

2.手势监听类 

package cn.com;

import android.app.Activity;
import android.util.Log;
import android.view.MotionEvent;
import android.view.GestureDetector.OnGestureListener;

public class FlingGuest implements OnGestureListener {
    Activity activity;

    int VALUE_DISTANCE = 100;
    int VALUE_SPEED = 20;

    public FlingGuest(Activity a) {
        activity = a;
    }

    // 用户轻触触摸屏，由1个MotionEvent ACTION_DOWN触发
    public boolean onDown(MotionEvent e) {
        Log.d("TAG", "[+++++++++++][onDown]");
        return true;
    }

    // e1, the begin of ACTION_DOWN MotionEvent
    // e2, the end of ACTION_DOWN MotionEvent
    // velocityX, the motion speed in X
    // velocityY：the motion speed in y
    // 用户按下触摸屏、快速移动后松开,由1个MotionEvent ACTION_DOWN,
    // 多个ACTION_MOVE, 1个ACTION_UP触发
    // e1：第1个ACTION_DOWN MotionEvent
    // e2：最后一个ACTION_MOVE MotionEvent
    // velocityX：X轴上的移动速度，像素/秒
    // velocityY：Y轴上的移动速度，像素/秒
    // 触发条件 ：
    // X轴的坐标位移大于VALUE_DISTANCE，且移动速度大于VALUE_SPEED个像素/秒
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        if ((e1.getX() - e2.getX() > VALUE_DISTANCE)
                && Math.abs(velocityX) > VALUE_SPEED) {
            Log.d("TAG", "[+++++++++++][onFling][Fling left]");
            ((Rotate)activity).leftMoveHandle();

        } else if ((e2.getX() - e1.getX() > VALUE_DISTANCE)
                && Math.abs(velocityX) > VALUE_SPEED) {
            Log.d("TAG", "[+++++++++++][onDown][Fling right]");
            ((Rotate)activity).rightMoveHandle();
        }
        return true;
    }

    // 用户长按触摸屏，由多个MotionEvent ACTION_DOWN触发
    public void onLongPress(MotionEvent e) {
        Log.d("TAG", "[+++++++++++][onLongPress]");
    }

    // 用户按下触摸屏，并拖动，由1个MotionEvent ACTION_DOWN, 多个ACTION_MOVE触发
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
            float distanceY) {
        Log.d("TAG", "[+++++++++++][onScroll]");
        return true;
    }

    // 用户轻触触摸屏，尚未松开或拖动，由一个1个MotionEvent ACTION_DOWN触发
    // 注意和onDown()的区别，强调的是没有松开或者拖动的状态
    public void onShowPress(MotionEvent e) {
        Log.d("TAG", "[+++++++++++][onShowPress]");
    }

    // 用户（轻触触摸屏后）松开，由一个MotionEvent ACTION_UP触发
    public boolean onSingleTapUp(MotionEvent e) {
        Log.d("TAG", "[+++++++++++][onSingleTapUp]");
        return true;
    }

}

3.Rotate3d.java动画辅助类 

package cn.com;

import android.graphics.Camera;
import android.graphics.Matrix;
import android.view.animation.Animation;
import android.view.animation.Transformation;

public class Rotate3d extends Animation {
    private float mFromDegree;
    private float mToDegree;
    private float mCenterX;
    private float mCenterY;
    private float mLeft;
    private float mTop;
    private Camera mCamera;
    private static final String TAG = "Rotate3d";

    public Rotate3d(float fromDegree, float toDegree, float left, float top,
            float centerX, float centerY) {
        this.mFromDegree = fromDegree;
        this.mToDegree = toDegree;
        this.mLeft = left;
        this.mTop = top;
        this.mCenterX = centerX;
        this.mCenterY = centerY;

    }

    @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 FromDegree = mFromDegree;
        float degrees = FromDegree + (mToDegree - mFromDegree)
                * interpolatedTime;
        final float centerX = mCenterX;
        final float centerY = mCenterY;
        final Matrix matrix = t.getMatrix();

        if (degrees <= -76.0f) {
            degrees = -90.0f;
            mCamera.save();
            mCamera.rotateY(degrees);
            mCamera.getMatrix(matrix);
            mCamera.restore();
        } else if (degrees >= 76.0f) {
            degrees = 90.0f;
            mCamera.save();
            mCamera.rotateY(degrees);
            mCamera.getMatrix(matrix);
            mCamera.restore();
        } else {
            mCamera.save();
            //
            mCamera.translate(0, 0, centerX);
            mCamera.rotateY(degrees);
            mCamera.translate(0, 0, -centerX);
            mCamera.getMatrix(matrix);
            mCamera.restore();
        }

        matrix.preTranslate(-centerX, -centerY);
        matrix.postTranslate(centerX, centerY);
    }
}

4.main.xml 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="wrap_content">
    <ImageView android:id="@+id/image2" android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:background="@drawable/two" />
    <ImageView android:id="@+id/image1" android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:background="@drawable/one" />
</RelativeLayout>