求助，怎么用android实现控件的3D立体旋转效果

实现水平滑动，所以可在手势抬起的时候进行判断并处理，是滑动显得流畅，代码如下：
package com.example.rotation3dview;
import android.content.Context;
import android.graphics.Camera;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewDebug.HierarchyTraceType;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.Scroller;

public class Rote3DView extends ViewGroup{
    private int mCurScreen = 1;
    // 滑动的速度
    private static final int SNAP_VELOCITY = 500;
    private VelocityTracker mVelocityTracker;
    private int mWidth;
    private Scroller mScroller;
    private Camera mCamera;
    private Matrix mMatrix;
    // 旋转的角度，可以进行修改来观察效果
    private float angle = 90;
    public Rote3DView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mScroller = new Scroller(context);
        mCamera = new Camera();
        mMatrix = new Matrix();
        initScreens();
    }

    public void initScreens(){
        ViewGroup.LayoutParams p = new ViewGroup.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT);
         for (int i = 0; i < 3; i++) {
             this.addView(new ImageView(this.getContext()), i, p);
         }
         ((ImageView)this.getChildAt(0)).setImageResource(R.drawable.page1);
         ((ImageView)this.getChildAt(1)).setImageResource(R.drawable.page2);
         ((ImageView)this.getChildAt(2)).setImageResource(R.drawable.page3);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        int childLeft = 0;
        final int childCount = getChildCount();
        for(int i = 0; i< childCount; i++){
            final View childView = getChildAt(i);
            if(childView.getVisibility() != View.GONE){
                final int childWidth = childView.getMeasuredWidth();
                childView.layout(childLeft, 0, childLeft + childWidth, childView.getMeasuredHeight());
                childLeft += childWidth;
            }
        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        final int width = MeasureSpec.getSize(widthMeasureSpec);
        final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        if(widthMode != MeasureSpec.EXACTLY){
            throw new IllegalStateException("仅支持精确尺寸");
        }
        final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        if(heightMode != MeasureSpec.EXACTLY){
            throw new IllegalStateException("仅支持精确尺寸");
        }
        final int count = getChildCount();
        for(int i = 0; i < count; i++){
            getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec);
        }
        scrollTo(mCurScreen * width, 0);
    }

    private float mDownX;
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if(mVelocityTracker == null){
            mVelocityTracker = VelocityTracker.obtain();
        }
        //将当前的触摸事件传递给VelocityTracker对象
        mVelocityTracker.addMovement(event);
        float x = event.getX();
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            if(!mScroller.isFinished()){
                mScroller.abortAnimation();
            }
            mDownX = x;
            break;
        case MotionEvent.ACTION_MOVE:
            int disX = (int)(mDownX - x);
            mDownX = x;
            scrollBy(disX, 0);
            break;
        case MotionEvent.ACTION_UP:
            final VelocityTracker velocityTracker = mVelocityTracker;
            velocityTracker.computeCurrentVelocity(1000);
            int velocityX = (int) velocityTracker.getXVelocity();
            if(velocityX > SNAP_VELOCITY && mCurScreen > 0){
                snapToScreen(mCurScreen - 1);
            }else if(velocityX < -SNAP_VELOCITY && mCurScreen < getChildCount() - 1){
                snapToScreen(mCurScreen + 1);
            }else{
                snapToDestination();
            }
            if(mVelocityTracker != null){
                mVelocityTracker.recycle();
                mVelocityTracker = null;
            }
            break;
        }
        return true;
    }

    @Override
    public void computeScroll() {
        if (mScroller.computeScrollOffset()) {
            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
            postInvalidate();
        }
    }

    public void snapToDestination(){
        setMWidth();
        final int destScreen = (getScrollX() + mWidth / 2) / mWidth;
        snapToScreen(destScreen);
    }

    public void snapToScreen(int whichScreen){
        whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1));
        setMWidth();
        int scrollX = getScrollX();
        int startWidth = whichScreen * mWidth;
        if(scrollX != startWidth){
            int delta = 0;
            int startX = 0;
            if(whichScreen > mCurScreen){
                setPre();
                delta = startWidth - scrollX;
                startX = mWidth - startWidth + scrollX;
            }else if(whichScreen < mCurScreen){
                setNext();
                delta = -scrollX;
                startX = scrollX + mWidth;
            }else{
                startX = scrollX;
                delta = startWidth - scrollX;
            }
            mScroller.startScroll(startX, 0, delta, 0, Math.abs(delta) * 2);
            invalidate();
        }
    }

    private void setNext(){
        int count = this.getChildCount();
        View view = getChildAt(count - 1);
        removeViewAt(count - 1);
        addView(view, 0);
    }

    private void setPre(){
        int count = this.getChildCount();
        View view = getChildAt(0);
        removeViewAt(0);
        addView(view, count - 1);
    }

    private void setMWidth(){
        if(mWidth == 0){
            mWidth = getWidth();
        }
    }
}

实现立体效果，添加如下代码：

@Override
protected void dispatchDraw(Canvas canvas) {
    final long drawingTime = getDrawingTime();
    final int count = getChildCount();
    for (int i = 0; i < count; i++) {
        drawScreen(canvas, i, drawingTime);
    }
}

public void drawScreen(Canvas canvas, int screen, long drawingTime) {
    // 得到当前子View的宽度
    final int width = getWidth();
    final int scrollWidth = screen * width;
    final int scrollX = this.getScrollX();
    // 偏移量不足的时
    if (scrollWidth > scrollX + width || scrollWidth + width < scrollX) {
        return;
    }
    final View child = getChildAt(screen);
    final int faceIndex = screen;
    final float currentDegree = getScrollX() * (angle / getMeasuredWidth());
    final float faceDegree = currentDegree - faceIndex * angle;
    if (faceDegree > 90 || faceDegree < -90) {
        return;
    }
    final float centerX = (scrollWidth < scrollX) ? scrollWidth + width
            : scrollWidth;
    final float centerY = getHeight() / 2;
    final Camera camera = mCamera;
    final Matrix matrix = mMatrix;
    canvas.save();
    camera.save();
    camera.rotateY(-faceDegree);
    camera.getMatrix(matrix);
    camera.restore();
    matrix.preTranslate(-centerX, -centerY);
    matrix.postTranslate(centerX, centerY);
    canvas.concat(matrix);
    drawChild(canvas, child, drawingTime);
    canvas.restore();
}

下面我们就开始一步步完成这个效果吧。实现水平滑动 [java] view plaincopyprint? 01.package com.example.rotation3dview; 02. 03.import android.content.Context; 04.import android.util.AttributeSet; 05.import android.view.MotionEvent; 06.import android.view.View; 07.import android.view.ViewDebug.HierarchyTraceType; 08.import android.view.ViewGroup; 09.import android.widget.ImageView; 10. 11.public class Rote3DView extends ViewGroup{ 12. 13. public Rote3DView(Context context, AttributeSet attrs) { 14. super(context, attrs); 15. initScreens(); 16. } 17. 18. public void initScreens(){ 19. ViewGroup.LayoutParams p = new ViewGroup.LayoutParams( 20. ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT); 21. for (int i = 0; i < 3; i++) { 22. this.addView(new ImageView(this.getContext()), i, p); 23. } 24. ((ImageView)this.getChildAt(0)).setImageResource(R.drawable.page1); 25. ((ImageView)this.getChildAt(1)).setImageResource(R.drawable.page2); 26. ((ImageView)this.getChildAt(2)).setImageResource(R.drawable.page3); 27. } 28. 29. @Override 30. protected void onLayout(boolean changed, int l, int t, int r, int b) { 31. int childLeft = 0; 32. final int childCount = getChildCount(); 33. for(int i = 0; i< childCount; i++){ 34. final View childView = getChildAt(i); 35. if(childView.getVisibility() != View.GONE){ 36. final int childWidth = childView.getMeasuredWidth(); 37. childView.layout(childLeft, 0, childLeft + childWidth, childView.getMeasuredHeight()); 38. childLeft += childWidth; 39. } 40. } 41. } 42. 43. @Override 44. protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 45. super.onMeasure(widthMeasureSpec, heightMeasureSpec); 46. final int width = MeasureSpec.getSize(widthMeasureSpec); 47. final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 48. if(widthMode != MeasureSpec.EXACTLY){ 49. throw new IllegalStateException("仅支持精确尺寸"); 50. } 51. final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 52. if(heightMode != MeasureSpec.EXACTLY){ 53. throw new IllegalStateException("仅支持精确尺寸"); 54. } 55. final int count = getChildCount(); 56. for(int i = 0; i < count; i++){ 57. getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); 58. } 59. } 60. 61. private float mDownX; 62. @Override 63. public boolean onTouchEvent(MotionEvent event) { 64. float x = event.getX(); 65. switch (event.getAction()) { 66. case MotionEvent.ACTION_DOWN: 67. mDownX = x; 68. break; 69. case MotionEvent.ACTION_MOVE: 70. int disX = (int)(mDownX - x); 71. mDownX = x; 72. scrollBy(disX, 0); 73. break; 74. case MotionEvent.ACTION_UP: 75. 76. break; 77. 78. default: 79. break; 80. } 81. 82. return true; 83. } 84. 85.} package com.example.rotation3dview; import android.content.Context; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import android.view.ViewDebug.HierarchyTraceType; import android.view.ViewGroup; import android.widget.ImageView; public class Rote3DView extends ViewGroup{ public Rote3DView(Context context, AttributeSet attrs) { super(context, attrs); initScreens(); } public void initScreens(){ ViewGroup.LayoutParams p = new ViewGroup.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT); for (int i = 0; i < 3; i++) { this.addView(new ImageView(this.getContext()), i, p); } ((ImageView)this.getChildAt(0)).setImageResource(R.drawable.page1); ((ImageView)this.getChildAt(1)).setImageResource(R.drawable.page2); ((ImageView)this.getChildAt(2)).setImageResource(R.drawable.page3); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { int childLeft = 0; final int childCount = getChildCount(); for(int i = 0; i< childCount; i++){ final View childView = getChildAt(i); if(childView.getVisibility() != View.GONE){ final int childWidth = childView.getMeasuredWidth(); childView.layout(childLeft, 0, childLeft + childWidth, childView.getMeasuredHeight()); childLeft += childWidth; } } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); final int width = MeasureSpec.getSize(widthMeasureSpec); final int widthMode = MeasureSpec.getMode(widthMeasureSpec); if(widthMode != MeasureSpec.EXACTLY){ throw new IllegalStateException("仅支持精确尺寸"); } final int heightMode = MeasureSpec.getMode(heightMeasureSpec); if(heightMode != MeasureSpec.EXACTLY){ throw new IllegalStateException("仅支持精确尺寸"); } final int count = getChildCount(); for(int i = 0; i < count; i++){ getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); } } private float mDownX; @Override public boolean onTouchEvent(MotionEvent event) { float x = event.getX(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mDownX = x; break; case MotionEvent.ACTION_MOVE: int disX = (int)(mDownX - x); mDownX = x; scrollBy(disX, 0); break; case MotionEvent.ACTION_UP: break; default: break; } return true; } }

下面我们就开始一步步完成这个效果吧。实现水平滑动 [java] view plaincopyprint? 01.package com.example.rotation3dview; 02. 03.import android.content.Context; 04.import android.util.AttributeSet; 05.import android.view.MotionEvent; 06.import android.view.View; 07.import android.view.ViewDebug.HierarchyTraceType; 08.import android.view.ViewGroup; 09.import android.widget.ImageView; 10. 11.public class Rote3DView extends ViewGroup{ 12. 13. public Rote3DView(Context context, AttributeSet attrs) { 14. super(context, attrs); 15. initScreens(); 16. } 17. 18. public void initScreens(){ 19. ViewGroup.LayoutParams p = new ViewGroup.LayoutParams( 20. ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT); 21. for (int i = 0; i < 3; i++) { 22. this.addView(new ImageView(this.getContext()), i, p); 23. } 24. ((ImageView)this.getChildAt(0)).setImageResource(R.drawable.page1); 25. ((ImageView)this.getChildAt(1)).setImageResource(R.drawable.page2); 26. ((ImageView)this.getChildAt(2)).setImageResource(R.drawable.page3); 27. } 28. 29. @Override 30. protected void onLayout(boolean changed, int l, int t, int r, int b) { 31. int childLeft = 0; 32. final int childCount = getChildCount(); 33. for(int i = 0; i< childCount; i++){ 34. final View childView = getChildAt(i); 35. if(childView.getVisibility() != View.GONE){ 36. final int childWidth = childView.getMeasuredWidth(); 37. childView.layout(childLeft, 0, childLeft + childWidth, childView.getMeasuredHeight()); 38. childLeft += childWidth; 39. } 40. } 41. } 42. 43. @Override 44. protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 45. super.onMeasure(widthMeasureSpec, heightMeasureSpec); 46. final int width = MeasureSpec.getSize(widthMeasureSpec); 47. final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 48. if(widthMode !

下面我们就开始一步步完成这个效果吧。实现水平滑动 [java] view plaincopyprint? 01.package com.example.rotation3dview; 02. 03.import android.content.Context; 04.import android.util.AttributeSet; 05.import android.view.MotionEvent; 06.import android.view.View; 07.import android.view.ViewDebug.HierarchyTraceType; 08.import android.view.ViewGroup; 09.import android.widget.ImageView; 10. 11.public class Rote3DView extends ViewGroup{ 12. 13. public Rote3DView(Context context, AttributeSet attrs) { 14. super(context, attrs); 15. initScreens(); 16. } 17. 18. public void initScreens(){ 19. ViewGroup.LayoutParams p = new ViewGroup.LayoutParams( 20. ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT); 21. for (int i = 0; i < 3; i++) { 22. this.addView(new ImageView(this.getContext()), i, p); 23. } 24. ((ImageView)this.getChildAt(0)).setImageResource(R.drawable.page1); 25. ((ImageView)this.getChildAt(1)).setImageResource(R.drawable.page2); 26. ((ImageView)this.getChildAt(2)).setImageResource(R.drawable.page3); 27. } 28. 29. @Override 30. protected void onLayout(boolean changed, int l, int t, int r, int b) { 31. int childLeft = 0; 32. final int childCount = getChildCount(); 33. for(int i = 0; i< childCount; i++){ 34. final View childView = getChildAt(i); 35. if(childView.getVisibility() != View.GONE){ 36. final int childWidth = childView.getMeasuredWidth(); 37. childView.layout(childLeft, 0, childLeft + childWidth, childView.getMeasuredHeight()); 38. childLeft += childWidth; 39. } 40. } 41. } 42. 43. @Override 44. protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 45. super.onMeasure(widthMeasureSpec, heightMeasureSpec); 46. final int width = MeasureSpec.getSize(widthMeasureSpec); 47. final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 48. if(widthMode != MeasureSpec.EXACTLY){ 49. throw new IllegalStateException("仅支持精确尺寸"); 50. } 51. final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 52. if(heightMode != MeasureSpec.EXACTLY){ 53. throw new IllegalStateException("仅支持精确尺寸"); 54. } 55. final int count = getChildCount(); 56. for(int i = 0; i < count; i++){ 57. getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); 58. } 59. } 60. 61. private float mDownX; 62. @Override 63. public boolean onTouchEvent(MotionEvent event) { 64. float x = event.getX(); 65. switch (event.getAction()) { 66. case MotionEvent.ACTION_DOWN: 67. mDownX = x; 68. break; 69. case MotionEvent.ACTION_MOVE: 70. int disX = (int)(mDownX - x); 71. mDownX = x; 72. scrollBy(disX, 0); 73. break; 74. case MotionEvent.ACTION_UP: 75. 76. break; 77. 78. default: 79. break; 80. } 81. 82. return true; 83. } 84. 85.} package com.example.rotation3dview; import android.content.Context; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import android.view.ViewDebug.HierarchyTraceType; import android.view.ViewGroup; import android.widget.ImageView; public class Rote3DView extends ViewGroup{ public Rote3DView(Context context, AttributeSet attrs) { super(context, attrs); initScreens(); } public void initScreens(){ ViewGroup.LayoutParams p = new ViewGroup.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT); for (int i = 0; i < 3; i++) { this.addView(new ImageView(this.getContext()), i, p); } ((ImageView)this.getChildAt(0)).setImageResource(R.drawable.page1); ((ImageView)this.getChildAt(1)).setImageResource(R.drawable.page2); ((ImageView)this.getChildAt(2)).setImageResource(R.drawable.page3); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { int childLeft = 0; final int childCount = getChildCount(); for(int i = 0; i< childCount; i++){ final View childView = getChildAt(i); if(childView.getVisibility() != View.GONE){ final int childWidth = childView.getMeasuredWidth(); childView.layout(childLeft, 0, childLeft + childWidth, childView.getMeasuredHeight()); childLeft += childWidth; } } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); final int width = MeasureSpec.getSize(widthMeasureSpec); final int widthMode = MeasureSpec.getMode(widthMeasureSpec); if(widthMode != MeasureSpec.EXACTLY){ throw new IllegalStateException("仅支持精确尺寸"); } final int heightMode = MeasureSpec.getMode(heightMeasureSpec); if(heightMode != MeasureSpec.EXACTLY){ throw new IllegalStateException("仅支持精确尺寸"); } final int count = getChildCount(); for(int i = 0; i < count; i++){ getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); } } private float mDownX; @Override public boolean onTouchEvent(MotionEvent event) { float x = event.getX(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mDownX = x; break; case MotionEvent.ACTION_MOVE: int disX = (int)(mDownX - x); mDownX = x; scrollBy(disX, 0); break; case MotionEvent.ACTION_UP: break; default: break; } return true; } }