电子书翻页效果（转）
2024-04-29 22:49:52
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：
Java代码 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"); } } }
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