Android 翻页效果 电子书 (转)

转载请注明来自： 5进制空间-android区

相信做电子书的同学，都遇到过翻页动画的需求吧，如果你不满足与点击滑动翻页的话，这边文章应该能够帮助到你。

先上个效果图：





效果还是很不错的，不过与ibook那个效果比起来，还是有差距的。应为这个没用到openGL做3D效果，只是用的2d的canvas画布去画的view，添加了阴影效果，还是挺有立体感的。而且比较流畅。openGL实现肯定效果会更好，不过就我目前的技术实力，实现希望还是渺茫的。

废话少说，还是上代码吧：

这里需要两个UI的view类和一个使用方法的demo。
第一个pageTurnerView.java：

public class PageTurnerViewP1 extends RelativeLayout{   
  
      private static final int CORNER_RIGHT_MASK = 1;   
      private static final int CORNER_TOP_MASK = 2;   
      public static final int CORNER_BOTTOM_LEFT = 0;   
      public static final int CORNER_BOTTOM_RIGHT = 1;   
      public static final int CORNER_TOP_LEFT = 2;   
      public static final int CORNER_TOP_RIGHT = 3;   
      private static final int INVALIDATE = 1;   
      private static final int INITIAL_TIME_DELAY = 100;   
      private static final int TIME_DELAY = 10;   
//    private static final int TIME_STEPS = 30;   
      private boolean mPageTurning;   
      private boolean mStepping;   
      public long mNextTime;   
      private int mTimeStep;   
      private int mDrawnTimeStep;   
      private int mCorner;   
      private Drawable mBackPage;   
      private Drawable mPageBackground;   
      private Path mForegroundPath;   
      private Path mBackPagePath;   
      private Path mBackgroundPath;   
      private float mRotation;   
      private Rect mChildRect = new Rect();   
      private int mOuterOffsetX;   
      private int mOuterOffsetY;   
      public float mPivotX;   
      private int mPageId;   
      private PageViewP1 mPage;   
      private PointF mPageTurnCorner = new PointF();   
      private PointF mOppositeCorner = new PointF();   
      private PointF mPageDim = new PointF();   
      private int mStepLen = 1;   
      public static final int KEEP = 0;   
      public static final int NEXT = 1;   
      public static final int LAST = 2;   
      public int mWhere = KEEP;   
      public boolean isBgInit = true;   
      public boolean isBackInit = true;   
      private  float ax,ay,bx,by,cx,cy,dx,dy,ex,ey,c0x,c0y;   
      private int mMaxStep=30;   
      public final Handler mHandler = new Handler() {   
          public void handleMessage(Message msg) {   
              if (msg.what != 1) { return; }   
//            PageTurnerViewP1.this.invalidate();   
              refreshUI();   
//            PageTurnerViewP1.this.invalidate((int)bx, (int)ay, (int)dx, (int)dy);   
              if (PageTurnerViewP1.this.mStepping) { return; }   
              msg = obtainMessage(1);   
              long current = SystemClock.uptimeMillis();   
              if (PageTurnerViewP1.this.mNextTime < current) {   
                  //PageTurnerViewP1.access$102(PageTurnerViewP1.this, current + 10L);   
                 PageTurnerViewP1.this.mNextTime= current + 5L;   
              }   
              sendMessageAtTime(msg, PageTurnerViewP1.this.mNextTime);   
              //PageTurnerViewP1.access$114(PageTurnerViewP1.this, 10L);   
                PageTurnerViewP1.this.mNextTime+= 5L;   
          }   
      };   
       
  
      public PageTurnerViewP1(Context context) {   
          super(context);   
          Log.i("==================== PageTurnerViewP1(Context context) =================", "" + this);   
      }   
  
      public PageTurnerViewP1(Context context, AttributeSet attrs) {   
          super(context, attrs);   
  
//        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PageTurner);   
  
//        this.mBackPage = a.getDrawable(1);   
//        this.mPageBackground = a.getDrawable(0);   
//   
//        this.mPageId = a.getResourceId(3, -1);   
//   
//        this.mCorner = a.getInt(2, 0);   
//          this.mBackPage = this.getResources().getDrawable(com.tom.clip.R.drawable.a5);   
//          this.mPageBackground =this.getResources().getDrawable(com.tom.clip.R.drawable.a6);   
               
          this.mPageId = -1;   
            this.mCorner = -1;   
      }   
  
      protected void onFinishInflate() {   
          super.onFinishInflate();   
          if (this.mPageId != -1) {   
              this.mPage = ((PageViewP1)findViewById(this.mPageId));   
              if (this.mPage != null)   
                  this.mPage.setPageTurner(this);   
          }   
      }   
  
      public void setPageId(int pageId) {   
          this.mPageId = pageId;   
          this.mPage = ((PageViewP1)findViewById(this.mPageId));   
          if (this.mPage != null)   
              this.mPage.setPageTurner(this);   
      }   
  
      public int getPageId() {   
          return this.mPageId;   
      }   
  
      public void setPage(PageViewP1 pageViewP1) {   
          this.mPage = pageViewP1;   
      }   
  
      public PageViewP1 getPage() {   
          return this.mPage;   
      }   
  
      public void setCorner(int corner) {   
          this.mCorner = corner;   
      }   
  
      public int getCorner() {   
          return this.mCorner;   
      }   
  
      protected void dispatchDraw(Canvas canvas) {   
             
            Log.v("log dispatchDraw:", "drawing back page"+mPageTurning);   
//        if ((this.mPageTurning) && (this.mPage != null) && (computePageTurn())) {   
          if ((computePageTurn())&& (this.mPageTurning) && (this.mPage != null) ) {   
              this.mPage.setClipPath(this.mForegroundPath);   
          }   
  
          super.dispatchDraw(canvas);   
  
          if (this.mPageTurning) {   
              drawBackground(canvas);   
              drawBackPage(canvas);   
                 
              if (!updateTimeStep()) {   
                  this.mHandler.removeMessages(1);   
                  if (this.mPage != null) {   
                      this.mPage.onPageTurnFinished(canvas);   
                  }   
                  this.mPageTurning = false;   
                  this.mStepping = false;   
                  invalidate();   
              }   
          }   
      }   
  
      public void startPageTurn(int mTimeStep) {   
          if ((this.mPage == null) && (this.mPageId != -1)) {   
              this.mPage = ((PageViewP1)findViewById(this.mPageId));   
          }   
          if (this.mPage == null) {   
              return;   
          }   
          this.mPage.setPageTurner(this);   
          Drawable d = this.mPage.getPageBackground();   
          if (d != null) {   
              this.mPageBackground = d;   
          }   
  
          d = this.mPage.getBackPage();   
          if (d != null) {   
              this.mBackPage = d;   
          }   
  
          int corner = this.mPage.getCorner();   
          if (corner != -1) {   
              this.mCorner = corner;   
          }   
//        this.mStepping=false;   
          this.mPageTurning = true;   
          this.mTimeStep = mTimeStep;   
          this.mDrawnTimeStep = -1;   
          Message msg = this.mHandler.obtainMessage(1);   
          this.mNextTime = (SystemClock.uptimeMillis() + 5L);   
          this.mHandler.sendMessageAtTime(msg, this.mNextTime);   
      }   
  
      public void stepPageTurn() {   
          if (!this.mStepping) {   
              this.mStepping = true;   
              startPageTurn(this.mTimeStep);   
          } else {   
//          te((int)bx, 0, (int)mPageTurnCorner.x, (int)mPageTurnCorner.y);   
//            sendUIhandler();   
              refreshUI();   
          }   
      }   
      public void refreshUI(){   
          computePageTurn();   
//     
          this.invalidate();   
      }   
      private void sendUIhandler(){   
          Message msg = this.mHandler.obtainMessage(1);   
          this.mNextTime = (SystemClock.uptimeMillis() + 30L);   
          this.mHandler.sendMessageAtTime(msg, this.mNextTime);   
      }   
      private boolean updateTimeStep() {   
          if (this.mTimeStep >mMaxStep || this.mTimeStep<0) {   
              return false;   
          }   
          this.mTimeStep +=mStepLen;   
          return true;   
      }   
         
      private boolean computePageTurn() {   
//        if ((this.mDrawnTimeStep == this.mTimeStep) ||(this.mTimeStep <0)||(this.mTimeStep >this.mMaxStep)) {   
          if ( (this.mTimeStep <0)||(this.mTimeStep >this.mMaxStep)) {   
              return false;   
          }   
          if (this.mPage == null) {   
              return false;   
          }   
          this.mDrawnTimeStep = this.mTimeStep;   
          View child = this.mPage.getChildAt(0);   
          child.getDrawingRect(this.mChildRect);   
//        this.mOuterOffsetX = (child.getLeft() - getLeft());   
//        this.mOuterOffsetY = (child.getTop() - getTop());   
          this.mOuterOffsetX = 0;   
          this.mOuterOffsetY = 0;   
  
          float width = this.mChildRect.right;   
          float height = this.mChildRect.bottom;   
          if(!mStepping){   
              this.mPivotX = (this.mTimeStep / 30.0f * width);   
          }   
          this.mForegroundPath = new Path();   
          this.mBackPagePath = new Path();   
          this.mBackgroundPath = new Path();   
          float slope = width / (this.mPivotX - width);   
          float y = this.mPivotX * slope;   
  
          this.mPageTurnCorner.x = 0.0F;   
          this.mPageTurnCorner.y = height;   
          this.mOppositeCorner.x = width;   
          this.mOppositeCorner.y = 0.0F;   
          float x0 = this.mPivotX;   
          float cornerIntersect = height * width / (height + width);   
          if ((this.mCorner & 0x1) != 0) {   
              this.mPageTurnCorner.x = width;   
              this.mOppositeCorner.x = 0.0F;   
              x0 = width - x0;   
          }   
  
          if ((this.mCorner & 0x2) != 0) {   
              this.mPageTurnCorner.y = 0.0F;   
              this.mOppositeCorner.y = height;   
          }   
  
          this.mPageDim.x = width;   
          this.mPageDim.y = height;   
          float page_slope;   
  
          if (this.mPivotX <= cornerIntersect) {   
              page_slope = firstHalfPageTurn(this.mPageDim, this.mPageTurnCorner, this.mOppositeCorner, x0, slope, y);   
          } else {   
              page_slope = secondHalfPageTurn(this.mPageDim, this.mPageTurnCorner, this.mOppositeCorner, x0, slope, y);   
          }   
  
          this.mRotation = (float)Math.atan(page_slope);   
  
          this.mRotation = (float)(-this.mRotation * 180.0D / 3.141592653589793D);   
  
          return true;   
      }   
  
      private float firstHalfPageTurn(PointF pageDim, PointF pageTurnCorner, PointF oppositeCorner, float xPivot, float slope, float y) {   
          float width = pageDim.x;   
          float height = pageDim.y;   
          View child = this.mPage.getChildAt(0);   
          int innerOffsetX = child.getLeft() - this.mPage.getLeft();   
          int innerOffsetY = child.getTop() - this.mPage.getTop();   
  
          float y1 = height + y;   
  
          float x2 = (float)(2.0D * y / (slope + 1.0D / slope));   
          float y2 = height + x2 / slope;   
          float page_slope = (height - y2) / (x2 - this.mPivotX);   
          if ((this.mCorner & 0x1) != 0) {   
              x2 = width - x2;   
              page_slope = -page_slope;   
          }   
          if ((this.mCorner & 0x2) != 0) {   
              y1 = height - y1;   
              y2 = height - y2;   
              page_slope = -page_slope;   
          }   
  
          float x0 = xPivot;   
          float x1 = pageTurnCorner.x;   
  
             
          //a点是右上角，b点位左下角，c点为右下角，d点为固定的右下角   
          ax=this.mOuterOffsetX + x1;   
          ay=this.mOuterOffsetY + y1;   
             
          bx=this.mOuterOffsetX + x2;   
          by=this.mOuterOffsetY + y2;   
             
          cx=this.mOuterOffsetX + x0;   
          cy=this.mOuterOffsetY + pageTurnCorner.y;   
             
          dx=this.mOuterOffsetX + pageTurnCorner.x;   
          dy=this.mOuterOffsetY + pageTurnCorner.y;   
             
          ex=(dx+bx)/2;   
          ey=(dy+by)/2;   
             
          this.mForegroundPath.moveTo(innerOffsetX + x1, innerOffsetY + y1);   
          this.mForegroundPath.lineTo(innerOffsetX + pageTurnCorner.x, innerOffsetY + oppositeCorner.y);   
          this.mForegroundPath.lineTo(innerOffsetX + oppositeCorner.x, innerOffsetY + oppositeCorner.y);   
          this.mForegroundPath.lineTo(innerOffsetX + oppositeCorner.x, innerOffsetY + pageTurnCorner.y);   
          this.mForegroundPath.lineTo(innerOffsetX + x0, innerOffsetY + pageTurnCorner.y);   
          this.mForegroundPath.lineTo(innerOffsetX + x2, innerOffsetY + y2);   
//        this.mForegroundPath.quadTo(ex, ey, bx, by);   
          this.mForegroundPath.lineTo(innerOffsetX + x1, innerOffsetY + y1);   
  
          this.mBackPagePath.moveTo(this.mOuterOffsetX + x1, this.mOuterOffsetY + y1);   
          this.mBackPagePath.lineTo(this.mOuterOffsetX + x2, this.mOuterOffsetY + y2);   
          //b到c的那条线，可以考虑画个弧线   
          this.mBackPagePath.lineTo(this.mOuterOffsetX + x0, this.mOuterOffsetY + pageTurnCorner.y);   
//        this.mBackPagePath.arcTo(new RectF(bx,by,cx,cy), 220, 180,false);   
//        this.mBackPagePath.quadTo(ex, ey, cx, cy);   
//        this.mBackPagePath.cubicTo(100, -50, 200, 50, cx, cy);//贝赛尔曲线   
          this.mBackPagePath.lineTo(this.mOuterOffsetX + x1, this.mOuterOffsetY + y1);   
  
             
          this.mBackgroundPath.moveTo(this.mOuterOffsetX + x1, this.mOuterOffsetY + y1);   
          this.mBackgroundPath.lineTo(this.mOuterOffsetX + x0, this.mOuterOffsetY + pageTurnCorner.y);   
          this.mBackgroundPath.lineTo(this.mOuterOffsetX + pageTurnCorner.x, this.mOuterOffsetY + pageTurnCorner.y);   
          this.mBackgroundPath.lineTo(this.mOuterOffsetX + x1, this.mOuterOffsetY + y1);   
  
          return page_slope;   
      }   
         
  
      private float secondHalfPageTurn(PointF pageDim, PointF pageTurnCorner, PointF oppositeCorner, float xPivot, float slope, float y) {   
          float width = pageDim.x;   
          float height = pageDim.y;   
          View child = this.mPage.getChildAt(0);   
          int xOffset = child.getLeft() - this.mPage.getLeft();   
          int yOffset = child.getTop() - this.mPage.getTop();   
  
          float y1 = 0.0F;   
          float x1 = width - (height + width) * (width - this.mPivotX) / width;   
  
          float x3 = (float)(2.0D * y / (slope + 1.0D / slope));   
          float y3 = height + x3 / slope;   
          float page_slope = (height - y3) / (x3 - this.mPivotX);   
          float b = height - x1 * page_slope;   
          float x2 = (float)((-y - b) / (page_slope + 1.0D / page_slope));   
          float y2 = (x1 - x2) * page_slope;   
  
          if ((this.mCorner & 0x1) != 0) {   
              x1 = width - x1;   
              x2 = width - x2;   
              x3 = width - x3;   
              page_slope = -page_slope;   
          }   
          if ((this.mCorner & 0x2) != 0) {   
              y1 = height - y1;   
              y2 = height - y2;   
              y3 = height - y3;   
              page_slope = -page_slope;   
          }   
  
          float x0 = xPivot;   
  
          this.mForegroundPath.moveTo(xOffset + x1, yOffset + y1);   
          this.mForegroundPath.lineTo(xOffset + oppositeCorner.x, yOffset + oppositeCorner.y);   
          this.mForegroundPath.lineTo(xOffset + oppositeCorner.x, yOffset + pageTurnCorner.y);   
          this.mForegroundPath.lineTo(xOffset + x0, yOffset + pageTurnCorner.y);   
          this.mForegroundPath.lineTo(xOffset + x1, yOffset + y1);   
  
        //a点是右上角，c0点位左上角，b点为左下角，d点为固定的右下角   
          ax=this.mOuterOffsetX + x1;   
          ay=this.mOuterOffsetY + y1;   
             
          c0x=this.mOuterOffsetX + x2;   
          c0y=this.mOuterOffsetY + y2;   
             
          bx=this.mOuterOffsetX + x3;   
          by=this.mOuterOffsetY + y3;   
          cx=this.mOuterOffsetX + x0;   
          cy=this.mOuterOffsetY + pageTurnCorner.y;   
             
          dx=this.mOuterOffsetX + pageTurnCorner.x;   
          dy=this.mOuterOffsetY + pageTurnCorner.y;   
             
          ex=(dx+bx)/2;   
          ey=(dy+by)/2;   
             
          this.mBackPagePath.moveTo(this.mOuterOffsetX + x1, this.mOuterOffsetY + y1);   
          this.mBackPagePath.lineTo(this.mOuterOffsetX + x2, this.mOuterOffsetY + y2);   
          this.mBackPagePath.lineTo(this.mOuterOffsetX + x3, this.mOuterOffsetY + y3);   
          this.mBackPagePath.lineTo(this.mOuterOffsetX + x0, this.mOuterOffsetY + pageTurnCorner.y);   
//        this.mBackPagePath.quadTo(ex, ey, cx, cy);   
          this.mBackPagePath.lineTo(this.mOuterOffsetX + x1, this.mOuterOffsetY + y1);   
           
             
             
          this.mBackgroundPath.moveTo(this.mOuterOffsetX + x1, this.mOuterOffsetY + y1);   
          this.mBackgroundPath.lineTo(this.mOuterOffsetX + x0, this.mOuterOffsetY + pageTurnCorner.y);   
          this.mBackgroundPath.lineTo(this.mOuterOffsetX + pageTurnCorner.x, this.mOuterOffsetY + pageTurnCorner.y);   
          this.mBackgroundPath.lineTo(this.mOuterOffsetX + pageTurnCorner.x, this.mOuterOffsetY + oppositeCorner.y);   
          this.mBackgroundPath.lineTo(this.mOuterOffsetX + x1, this.mOuterOffsetY + y1);   
  
          return page_slope;   
      }   
  
      private void drawBackground(Canvas canvas) {   
          canvas.save();   
//        canvas.setDrawFilter(new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG));   
          canvas.clipPath(this.mBackgroundPath, Region.Op.INTERSECT);   
          canvas.translate(this.mOuterOffsetX, this.mOuterOffsetY);   
             
          if (this.mPageBackground != null) {   
              this.mPageBackground.setBounds(0, 0, this.mChildRect.right, this.mChildRect.bottom);   
  
              this.mPageBackground.draw(canvas);   
          }   
          if (this.mPage != null) {   
              this.mPage.drawBackground(canvas);   
          }   
             
        // add drop shadow start test   
            if(mTimeStep<=29&&ex>2){   
            LinearGradient grad = new LinearGradient(   
                    ex,ey,ex+(dx-ex)/4,ey+(dy-ey)/4,R.color.gray3,Color.TRANSPARENT,Shader.TileMode.CLAMP);   
            Paint p=new Paint();   
            p.setShader(grad);   
//          p.setAlpha(120);   
            canvas.drawPath(this.mBackgroundPath,p);   
            //end test   
            }   
          canvas.restore();   
             
           
      }   
  
      private void drawBackPage(Canvas canvas) {   
          float width = this.mChildRect.right;   
          float height = this.mChildRect.bottom;   
          canvas.save();   
//        canvas.setDrawFilter(new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG));   
          canvas.clipPath(this.mBackPagePath, Region.Op.INTERSECT);   
          float xShift = 2.0F * this.mPivotX - width;   
          float xRotate = width - this.mPivotX;   
          float yRotate = height;   
          if ((this.mCorner & 0x1) != 0) {   
              xShift = width - 2.0F * this.mPivotX;   
              xRotate = this.mPivotX;   
          }   
          if ((this.mCorner & 0x2) != 0) {   
              yRotate = 0.0F;   
          }   
          canvas.translate(this.mOuterOffsetX + xShift, this.mOuterOffsetY);   
          canvas.rotate(this.mRotation, xRotate, yRotate);   
             
          //画原本的背面   
          if (this.mBackPage != null) {   
              this.mBackPage.setBounds(0, 0, this.mChildRect.right, this.mChildRect.bottom);   
              this.mBackPage.draw(canvas);   
          }   
          //画回调函数中的画背面   
          if (this.mPage != null) {   
                Log.v("log2 drawBackPage2:", "drawing back page");   
              this.mPage.drawBackPage(canvas);   
          }   
             
          canvas.restore();   
          canvas.save();   
//        canvas.setDrawFilter(new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG));   
//        int[] colors={Color.BLACK,Color.GRAY,Color.BLACK};   
//          LinearGradient grad = new LinearGradient(   
//                  ex,ey,bx,by,colors,null,Shader.TileMode.CLAMP);   
//          Paint p=new Paint();   
//          p.setShader(grad);   
//          p.setAlpha(120);   
//          canvas.drawPath(this.mBackPagePath,p);   
            LinearGradient grad = new LinearGradient(   
                    ex,ey,ex-(ex-bx)/4,ey-(ey-by)/4,R.color.gray3,0xC9C9C9,Shader.TileMode.CLAMP);   
            Paint p=new Paint();   
            p.setShader(grad);   
//          p.setAlpha(120);   
            canvas.drawPath(this.mBackPagePath,p);   
            canvas.restore();   
            //中间阴影问题，起点蓝色-》 白色-》 蓝色终点，这样起点前和终点后的区域也为蓝色了。   
            canvas.save();   
//          canvas.setDrawFilter(new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG));   
            LinearGradient grad1 = new LinearGradient(   
                    ex-(ex-bx)/4,ey-(ey-by)/4,bx,by,0xC9C9C9,R.color.gray3,Shader.TileMode.CLAMP);   
            Paint p1=new Paint();   
            p1.setShader(grad1);   
//          p1.setAlpha(120);   
            canvas.drawPath(this.mBackPagePath,p1);   
            canvas.restore();   
//   
               
      }   
         
      public int getmTimeStep(){   
             
          return mTimeStep;   
      }   
      public void setmTimeStep(int mTimeStep ){   
             
          this.mTimeStep= mTimeStep;   
      }   
      public boolean getmStepping(){   
             
          return mStepping;   
      }   
      public void setmStepping(boolean mStepping ){   
             
          this.mStepping= mStepping;   
      }   
         
      public void setmStepLen(int mStepLen){   
          this.mStepLen=mStepLen;   
      }   
      public int getmStepLen(){   
          return this.mStepLen;   
      }   
         
      public void setmMaxStep(int mMaxStep){   
          this.mMaxStep=mMaxStep;   
      }   
      public int getmMaxStep(){   
          return this.mMaxStep;   
      }   
  
    public void setPreStart(int where)   
    {   
        switch (where)    
        {   
            case NEXT:   
            case LAST:   
                mWhere = where;   
                break;   
                   
            default:   
                mWhere = KEEP;   
                break;   
        }   
           
        isBgInit = true;   
        isBackInit = true;   
           
    }   
       
       
}  

第二个view类pageView.java：

public class PageViewP1 extends RelativeLayout {
	public static final int CORNER_BOTTOM_LEFT = 0;
	public static final int CORNER_BOTTOM_RIGHT = 1;
	public static final int CORNER_TOP_LEFT = 2;
	public static final int CORNER_TOP_RIGHT = 3;
	private Path mClipPath;
	private PageTurnerViewP1 mPageTurner;
	private Callback mCallback;
	private int mCorner;
	private Drawable mBackPage;
	private Drawable mPageBackground;
 
	public PageViewP1(Context context) {
		super(context);
	}
 
	public PageViewP1(Context context, AttributeSet attrs ) {
		super(context, attrs );
 
		this.mBackPage =this.getBackground();
		this.mCorner = -1;
	}
 
	void setPageTurner(PageTurnerViewP1 pageTurnerViewP1) {
		this.mPageTurner = pageTurnerViewP1;
	}
 
	void setClipPath(Path clipPath) {
		this.mClipPath = clipPath;
	}
 
	public void setCallback(Callback callback)  {
		this.mCallback = callback;
	}
 
	void drawBackPage(Canvas canvas) {
	   if (this.mCallback != null)
		   this.mCallback.onDrawBackPage(canvas);
	}
 
	void drawBackground(Canvas canvas) {
		if (this.mCallback != null)
			this.mCallback.onDrawBackground(canvas);
	}
 
	public void startPageTurn() {
		if (this.mPageTurner != null)
			this.mPageTurner.startPageTurn(0);
	}
 
	void onPageTurnFinished(Canvas canvas) {
		this.mCallback.onPageTurnFinished(canvas);
		this.mClipPath = null;
	}
 
	protected void dispatchDraw(Canvas canvas) {
		if (this.mClipPath != null) {
			canvas.save();
			canvas.clipPath(this.mClipPath, Region.Op.INTERSECT);
		}
		super.dispatchDraw(canvas);
		if (this.mClipPath != null)
			canvas.restore();
	}
 
	public void setCorner(int corner) {
		this.mCorner = corner;
	}
 
	public int getCorner() {
		return this.mCorner;
	}
 
	public void setBackPage(Drawable backPage) {
		this.mBackPage = backPage;
	}
 
	public Drawable getBackPage() {
		return this.mBackPage;
	}
 
	public void setPageBackground(Drawable background) {
		this.mPageBackground = background;
	}
 
	public Drawable getPageBackground() {
		return this.mPageBackground;
	}
 
	public static abstract class Callback {
		public void onDrawBackPage(Canvas canvas) {
			Log.v("Callback", "drawing back page");
		}
		public void onDrawBackground(Canvas canvas) {
			Log.v("Callback2", "drawing back page");
		}
		public void onPageTurnFinished(Canvas canvas) {
			Log.v("Callback3", "drawing back page");
		}
	}
}

评论

1 楼 champ0810 2013-11-14  

有源码么？