本文介绍了一种在Android中实现翻页效果的方法，包括通过坐标计算实现的第一种翻页效果和利用贝赛尔曲线实现的第二种翻页效果。此外，还提供了具体的源码示例。
第一种翻页效果如下：
实现原理：
当前手指触摸点为a，则 a点坐标为（ax,ay）， 由三角形acb与三角形cmb为对称三角形并且直线cp为am垂直平分线，则 B点坐标为(ax/2,ay/2)。
作gf垂直于om且cb垂直于am， 三角形cfg与gfm相似，则 cf:gf = gf:mf cf=(gf * gf) / mf gf长度为g点纵坐标 mf长度为g点横坐标
cf长度可求 c点坐标可求 由c点、g点可确定过两点间的直线， 当该直线中x=0时求出与y足交点。
第二种翻页效果
实现原理：
使用贝赛尔曲线。曲线有四个点：起始点、终止点（也称锚点）以及两个相互分离的中间点。滑动两个中间点，贝塞尔曲线的形状会发生变化。
根据第一种翻页效果原理可以确定a、e、h、f、g ，由eh平行于cj且af垂直于eh，则 af垂直于cj则三角形egf相似于三角形cnf 则有ef:cf = gf:nf 。
设n为ag中点 则有cf=(3/2)*ef ,则c点坐标可求 由c点、k点坐标已知可知过两点间的直线
由该直线可计算与y轴相交点j 由a、e、c、j可计算两条直线的相交点b 同理可求点k。
在Android中的具体实现步骤：
起始页展示
1.创建屏幕尺寸的bmp 2.将图片转化为canvas 3.获取起始页面数据 3.在canvas中绘制起始页数据 4.在当前视图中复写onDraw进行重绘出bmp对象
翻页处理
1.初始化时创建两个bmp（bmp1、bmp2）并将其转换为canvas(canvas1、canvas2)
2.获取手势首次触摸的区域 （例：当首次点击屏幕的位置x<50&&y<50则为左上角）
3.根据首次点击区域判断需要展示的数据（例：首次点击处于左侧区域【左上、左下】的则判断操作为下一页操作）
4.获取下一页中数据并绘制出来在canvas2中
5.根据1中获取的区域位置调用起始动画使视图移动到手势首次点击位置
6.获取手势每次移动的坐标并根据移动坐标计算绘制的各个点的坐标
7.每次移动刷新视图
源码实例1:
项目结构:
PageWidget:
package sf.hmg.turntest; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.PointF; import android.graphics.Region; import android.graphics.drawable.GradientDrawable; import android.util.Log; import android.view.MotionEvent; import android.view.View; public class PageWidget extends View { private static final String TAG = "hmg"; private int mWidth = 480; private int mHeight = 800; private int mCornerX = 0; // 拖拽点对应的页脚 private int mCornerY = 0; private Path mPath0; private Path mPath1;
Bitmap mCurPageBitmap = null; //当前页 Bitmap mCurPageBackBitmap = null;
Bitmap mNextPageBitmap = null;
PointF mTouch = new PointF(); // 拖拽点 PointF mBezierStart1 = new PointF(); // 贝塞尔曲线起始点 PointF mBezierControl1 = new PointF(); // 贝塞尔曲线控制点 PointF mBeziervertex1 = new PointF(); // 贝塞尔曲线顶点 PointF mBezierEnd1 = new PointF(); // 贝塞尔曲线结束点 PointF mBezierStart2 = new PointF(); // 另一条贝塞尔曲线 PointF mBezierControl2 = new PointF();
PointF mBeziervertex2 = new PointF();
PointF mBezierEnd2 = new PointF(); float mMiddleX; float mMiddleY; float mDegrees; float mTouchToCornerDis; boolean mIsRTandLB; // 是否属于右上左下 // for test float mMaxLength = (float) Math.hypot(480, 800); int[] mBackShadowColors; int[] mFrontShadowColors;
GradientDrawable mBackShadowDrawableLR;
GradientDrawable mBackShadowDrawableRL;
GradientDrawable mFolderShadowDrawableLR;
GradientDrawable mFolderShadowDrawableRL;
GradientDrawable mFrontShadowDrawableHBT;
GradientDrawable mFrontShadowDrawableHTB;
GradientDrawable mFrontShadowDrawableVLR;
GradientDrawable mFrontShadowDrawableVRL; private Bitmap mBitmap; private Canvas mCanvas; private Paint mBitmapPaint;
Paint paint; public PageWidget(Context context) { super(context); // TODO Auto-generated constructor stub mPath0 = new Path();
mPath1 = new Path();
createDrawable(); // --------------------------------------- mBitmap = Bitmap.createBitmap(480, 800, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
mCurPageBitmap = Bitmap.createBitmap(480, 800, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(mCurPageBitmap);
paint = new Paint();
canvas.drawColor(Color.YELLOW);
canvas.drawBitmap(mCurPageBitmap, 0, 0, paint);
mNextPageBitmap = Bitmap
.createBitmap(480, 800, Bitmap.Config.ARGB_8888);
canvas = new Canvas(mNextPageBitmap);
canvas.drawColor(Color.GREEN);
canvas.drawBitmap(mNextPageBitmap, 0, 0, paint);
} /** * Author : hmg25
* Version: 1.0
* Description : 计算拖拽点对应的拖拽脚 */ private void calcCornerXY(float x, float y) { if (x <= mWidth / 2)
mCornerX = 0; else mCornerX = mWidth; if (y <= mHeight / 2)
mCornerY = 0; else mCornerY = mHeight; if ((mCornerX == 0 && mCornerY == mHeight)
|| (mCornerX == mWidth && mCornerY == 0))
mIsRTandLB = true; else mIsRTandLB = false;
}
@Override public boolean onTouchEvent(MotionEvent event) { // TODO Auto-generated method stub if (event.getAction() == MotionEvent.ACTION_MOVE) {
mCanvas.drawColor(0xFFAAAAAA);
mTouch.x = event.getX();
mTouch.y = event.getY(); this.postInvalidate();
} if (event.getAction() == MotionEvent.ACTION_DOWN) {
mCanvas.drawColor(0xFFAAAAAA);
mTouch.x = event.getX();
mTouch.y = event.getY();
calcCornerXY(mTouch.x, mTouch.y); this.postInvalidate();
} if (event.getAction() == MotionEvent.ACTION_UP) {
mCanvas.drawColor(0xFFAAAAAA);
mTouch.x = mCornerX;
mTouch.y = mCornerY; this.postInvalidate();
} // return super.onTouchEvent(event); return true;
} /** * Author : Administrator
* Version: 1.0
* Description : 求解直线P1P2和直线P3P4的交点坐标 */ public PointF getCross(PointF P1, PointF P2, PointF P3, PointF P4) {
PointF CrossP = new PointF(); // 二元函数通式： y=ax+b float a1 = (P2.y - P1.y) / (P2.x - P1.x); float b1 = ((P1.x * P2.y) - (P2.x * P1.y)) / (P1.x - P2.x); float a2 = (P4.y - P3.y) / (P4.x - P3.x); float b2 = ((P3.x * P4.y) - (P4.x * P3.y)) / (P3.x - P4.x);
CrossP.x = (b2 - b1) / (a1 - a2);
CrossP.y = a1 * CrossP.x + b1; return CrossP;
} private void calcPoints() {
mMiddleX = (mTouch.x + mCornerX) / 2;
mMiddleY = (mTouch.y + mCornerY) / 2;
mBezierControl1.x = mMiddleX - (mCornerY - mMiddleY)
* (mCornerY - mMiddleY) / (mCornerX - mMiddleX);
mBezierControl1.y = mCornerY;
mBezierControl2.x = mCornerX;
mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX)
* (mCornerX - mMiddleX) / (mCornerY - mMiddleY);
Log.i("hmg", "mTouchX " + mTouch.x + " mTouchY " + mTouch.y);
Log.i("hmg", "mBezierControl1.x " + mBezierControl1.x
+ " mBezierControl1.y " + mBezierControl1.y);
Log.i("hmg", "mBezierControl2.x " + mBezierControl2.x
+ " mBezierControl2.y " + mBezierControl2.y);
mBezierStart1.x = mBezierControl1.x - (mCornerX - mBezierControl1.x)
/ 2;
mBezierStart1.y = mCornerY;
mBezierStart2.x = mCornerX;
mBezierStart2.y = mBezierControl2.y - (mCornerY - mBezierControl2.y)
/ 2;
Log.i("hmg", "mBezierStart1.x " + mBezierStart1.x
+ " mBezierStart1.y " + mBezierStart1.y);
Log.i("hmg", "mBezierStart2.x " + mBezierStart2.x
+ " mBezierStart2.y " + mBezierStart2.y);
mTouchToCornerDis = (float) Math.hypot((mTouch.x - mCornerX),
(mTouch.y - mCornerY));
mBezierEnd1 = getCross(mTouch, mBezierControl1, mBezierStart1,
mBezierStart2);
mBezierEnd2 = getCross(mTouch, mBezierControl2, mBezierStart1,
mBezierStart2);
Log.i("hmg", "mBezierEnd1.x " + mBezierEnd1.x + " mBezierEnd1.y "
+ mBezierEnd1.y);
Log.i("hmg", "mBezierEnd2.x " + mBezierEnd2.x + " mBezierEnd2.y "
+ mBezierEnd2.y); /* * mBeziervertex1.x 推导
* ((mBezierStart1.x+mBezierEnd1.x)/2+mBezierControl1.x)/2 化简等价于
* (mBezierStart1.x+ 2*mBezierControl1.x+mBezierEnd1.x) / 4 */ mBeziervertex1.x = (mBezierStart1.x + 2 * mBezierControl1.x + mBezierEnd1.x) / 4;
mBeziervertex1.y = (2 * mBezierControl1.y + mBezierStart1.y + mBezierEnd1.y) / 4;
mBeziervertex2.x = (mBezierStart2.x + 2 * mBezierControl2.x + mBezierEnd2.x) / 4;
mBeziervertex2.y = (2 * mBezierControl2.y + mBezierStart2.y + mBezierEnd2.y) / 4;
Log.i("hmg", "mBeziervertex1.x " + mBeziervertex1.x
+ " mBeziervertex1.y " + mBeziervertex1.y);
Log.i("hmg", "mBeziervertex2.x " + mBeziervertex2.x
+ " mBeziervertex2.y " + mBeziervertex2.y);
} private void drawCurrentPageArea(Canvas canvas, Bitmap bitmap, Path path) {
mPath0.reset();
mPath0.moveTo(mBezierStart1.x, mBezierStart1.y);
mPath0.quadTo(mBezierControl1.x, mBezierControl1.y, mBezierEnd1.x,
mBezierEnd1.y);
mPath0.lineTo(mTouch.x, mTouch.y);
mPath0.lineTo(mBezierEnd2.x, mBezierEnd2.y);
mPath0.quadTo(mBezierControl2.x, mBezierControl2.y, mBezierStart2.x,
mBezierStart2.y);
mPath0.lineTo(mCornerX, mCornerY);
mPath0.close();
canvas.save();
canvas.clipPath(path, Region.Op.XOR);
canvas.drawBitmap(bitmap, 0, 0, null);
canvas.restore();
} private void drawNextPageAreaAndShadow(Canvas canvas, Bitmap bitmap) {
mPath1.reset();
mPath1.moveTo(mBezierStart1.x, mBezierStart1.y);
mPath1.lineTo(mBeziervertex1.x, mBeziervertex1.y);
mPath1.lineTo(mBeziervertex2.x, mBeziervertex2.y);
mPath1.lineTo(mBezierStart2.x, mBezierStart2.y);
mPath1.lineTo(mCornerX, mCornerY);
mPath1.close();
mDegrees = (float) Math.toDegrees(Math.atan2(mBezierControl1.x
- mCornerX, mBezierControl2.y - mCornerY)); float f5 = mTouchToCornerDis /4; int leftx; int rightx;
GradientDrawable mBackShadowDrawable; if(mIsRTandLB)
{
leftx=(int)(mBezierStart1.x - 1);
rightx= (int)(mBezierStart1.x +mTouchToCornerDis /4+ 1);
mBackShadowDrawable=mBackShadowDrawableLR;
}else {
leftx=(int)(mBezierStart1.x - mTouchToCornerDis/4 - 1);
rightx= (int) mBezierStart1.x + 1;
mBackShadowDrawable=mBackShadowDrawableRL;
}
Log.i("hmg", "leftx " + leftx
+ " rightx " + rightx);
canvas.save();
canvas.clipPath(mPath0);
canvas.clipPath(mPath1, Region.Op.INTERSECT);
canvas.drawBitmap(bitmap, 0, 0, null);
canvas.rotate(mDegrees, mBezierStart1.x, mBezierStart1.y);
mBackShadowDrawable.setBounds(leftx,
(int)mBezierStart1.y, rightx,
(int) (mMaxLength + mBezierStart1.y));
mBackShadowDrawable.draw(canvas);
canvas.restore();
} public void setBitmaps(Bitmap bm1, Bitmap bm2, Bitmap bm3) {
mCurPageBitmap = bm1;
mCurPageBackBitmap = bm2;
mNextPageBitmap = bm3;
}
@Override protected void onDraw(Canvas canvas) {
canvas.drawColor(0xFFAAAAAA);
calcPoints();
drawCurrentPageArea(mCanvas, mCurPageBitmap, mPath0);
drawNextPageAreaAndShadow(mCanvas, mNextPageBitmap);
drawCurrentPageShadow(mCanvas);
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
} /** * Author : hmg25
* Version: 1.0
* Description : 创建阴影的GradientDrawable */ private void createDrawable() { int[] color = { 0x333333, 0xB0333333 };
mFolderShadowDrawableRL = new GradientDrawable(
GradientDrawable.Orientation.RIGHT_LEFT, color);
mFolderShadowDrawableRL
.setGradientType(GradientDrawable.LINEAR_GRADIENT);
mFolderShadowDrawableLR = new GradientDrawable(
GradientDrawable.Orientation.LEFT_RIGHT, color);
mFolderShadowDrawableLR.setGradientType(GradientDrawable.LINEAR_GRADIENT);
mBackShadowColors = new int[] { 0xFF111111, 0x111111 };
mBackShadowDrawableRL = new GradientDrawable(
GradientDrawable.Orientation.RIGHT_LEFT, mBackShadowColors);
mBackShadowDrawableRL.setGradientType(GradientDrawable.LINEAR_GRADIENT);
mBackShadowDrawableLR = new GradientDrawable(
GradientDrawable.Orientation.LEFT_RIGHT, mBackShadowColors);
mBackShadowDrawableLR.setGradientType(GradientDrawable.LINEAR_GRADIENT);
mFrontShadowColors = new int[] { 0x80888888, 0x888888 };
mFrontShadowDrawableVLR = new GradientDrawable(
GradientDrawable.Orientation.LEFT_RIGHT, mFrontShadowColors);
mFrontShadowDrawableVLR.setGradientType(GradientDrawable.LINEAR_GRADIENT);
mFrontShadowDrawableVRL = new GradientDrawable(
GradientDrawable.Orientation.RIGHT_LEFT, mFrontShadowColors);
mFrontShadowDrawableVRL.setGradientType(GradientDrawable.LINEAR_GRADIENT);
mFrontShadowDrawableHTB = new GradientDrawable(
GradientDrawable.Orientation.TOP_BOTTOM, mFrontShadowColors);
mFrontShadowDrawableHTB.setGradientType(GradientDrawable.LINEAR_GRADIENT);
mFrontShadowDrawableHBT = new GradientDrawable(
GradientDrawable.Orientation.BOTTOM_TOP, mFrontShadowColors);
mFrontShadowDrawableHBT.setGradientType(GradientDrawable.LINEAR_GRADIENT);
} public void drawCurrentPageShadow(Canvas canvas)
{ //注：拖拽顶点的阴影，定位有问题，待修改~~ double d1 = Math.atan2(mBezierControl1.y - mTouch.y, mTouch.x-mBezierControl1.x); // double d3 =(float)Math.cos(d1) * 25*1.414f; double d3 =(float) 25/Math.cos(d1) ; // float x = (float)(mTouch.x-d3); // float y = mTouch.y -(float)Math.sin(d1) * 25*1.414f; float x = (float)(mTouch.x-d3); float y =(float)( mTouch.y -d3);
mPath1.reset();
mPath1.moveTo(x, y);
mPath1.lineTo(mTouch.x, mTouch.y);
mPath1.lineTo(mBezierControl1.x, mBezierControl1.y);
mPath1.lineTo(mBezierStart1.x, mBezierStart1.y);
mPath1.close(); float rotateDegrees;
canvas.save();
canvas.clipPath(mPath0, Region.Op.XOR);
canvas.clipPath(mPath1,Region.Op.INTERSECT); int leftx; int rightx;
GradientDrawable mCurrentPageShadow; if(mIsRTandLB)
{
leftx=(int)(mBezierControl1.x);
rightx= (int)mBezierControl1.x+25;
mCurrentPageShadow=mFrontShadowDrawableVLR;
}else {
leftx=(int)(mBezierControl1.x-25);
rightx= (int) mBezierControl1.x;
mCurrentPageShadow=mFrontShadowDrawableVRL;
}
rotateDegrees= (float)Math.toDegrees(Math.atan2(mTouch.x-mBezierControl1.x,mBezierControl1.y-mTouch.y));
canvas.rotate(rotateDegrees, mBezierControl1.x, mBezierControl1.y);
mCurrentPageShadow.setBounds(leftx, (int)(mBezierControl1.y-500), rightx, (int)(mBezierControl1.y));
mCurrentPageShadow.draw(canvas);
canvas.restore();
mPath1.reset();
mPath1.moveTo(x, y);
mPath1.lineTo(mTouch.x, mTouch.y);
mPath1.lineTo(mBezierControl2.x, mBezierControl2.y);
mPath1.lineTo(mBezierStart2.x, mBezierStart2.y);
mPath1.close();
canvas.save();
canvas.clipPath(mPath0, Region.Op.XOR);
canvas.clipPath(mPath1,Region.Op.INTERSECT); if(mIsRTandLB)
{
leftx=(int)(mBezierControl2.y);
rightx=(int)(mBezierControl2.y+25);
mCurrentPageShadow=mFrontShadowDrawableHTB;
}else {
leftx=(int)(mBezierControl2.y-25);
rightx=(int)(mBezierControl2.y);
mCurrentPageShadow=mFrontShadowDrawableHBT;
}
rotateDegrees= (float)Math.toDegrees(Math.atan2(mBezierControl2.y-mTouch.y,mBezierControl2.x-mTouch.x));
canvas.rotate( rotateDegrees, mBezierControl2.x, mBezierControl2.y);
mCurrentPageShadow.setBounds((int)(mBezierControl2.x-500),leftx , (int)(mBezierControl2.x), rightx );
mCurrentPageShadow.draw(canvas);
canvas.restore();
}
}turntest:
package sf.hmg.turntest; import android.app.Activity; import android.os.Bundle; import android.view.Window; import android.view.WindowManager; public class turntest extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(
WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(new PageWidget(this));
}
}实例1效果图:
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实例2代码:
工程结构图:
MainActivity:
package com.xin.book; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.os.Bundle; import com.xin.book.view.BookAdapter; import com.xin.book.view.BookLayout; public class MainActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
BookLayout bk = new BookLayout(this);
List<String> str = new ArrayList<String>();
str.add("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
str.add("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
str.add("ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc");
str.add("ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd");
str.add("eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee");
str.add("fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
BookAdapter ba = new BookAdapter(this);
ba.addItem(str);
bk.setPageAdapter(ba);
setContentView(bk);
}
}BookAdapter:
package com.xin.book.view; import java.util.ArrayList; import java.util.List; import android.content.Context; import android.graphics.Color; import android.view.View; import android.view.ViewGroup.LayoutParams; import android.widget.FrameLayout; import android.widget.TextView; import com.xin.book.R; public class BookAdapter implements IAdapter{ private List<String> strList = new ArrayList<String>(); private Context mContext; public BookAdapter(Context context) { super(); this.mContext = context;
} public void addItem(List<String> list){
strList.addAll(list);
} public int getCount() { return strList.size();
} public String getItem(int position) { return strList.get(position);
} public long getItemId(int position) { return position;
} public View getView(int position) {
TextView textView = new TextView(mContext);
textView.setText(strList.get(position));
textView.setTextColor(Color.BLACK);
textView.setTextSize(32);
textView.setBackgroundColor(Color.WHITE);
textView.setBackgroundResource(R.drawable.ly);
textView.setPadding(10, 10, 10, 10);
textView.setLayoutParams(new FrameLayout.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT)); return textView;
}
}BookLayout:
package com.xin.book.view; import java.util.Date; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.LinearGradient; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.Path; import android.graphics.Point; import android.graphics.PorterDuffXfermode; import android.graphics.Shader; import android.graphics.PorterDuff.Mode; import android.os.Handler; import android.util.AttributeSet; import android.util.Log; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.GestureDetector.OnGestureListener; import android.widget.FrameLayout; import android.widget.LinearLayout; public class BookLayout extends FrameLayout { public static final String LOG_TAG = "HarHar"; private int totalPageNum; private Context mContext; private boolean hasInit = false; private final int defaultWidth = 600, defaultHeight = 400; private int contentWidth = 0; private int contentHeight = 0; private View currentPage,middlePage,nextPage,prevPage; private LinearLayout invisibleLayout; private LinearLayout mainLayout; private BookView mBookView; private Handler aniEndHandle; private static boolean closeBook = false; private Corner mSelectCorner; private final int clickCornerLen = 250 * 250; // 50dip private float scrollX = 0, scrollY = 0; private int indexPage = 0; private BookState mState; private Point aniStartPos; private Point aniStopPos; private Date aniStartTime; private long aniTime = 800; private long timeOffset = 10; // private Listener mListener; private BookAdapter mPageAdapter; private GestureDetector mGestureDetector; private BookOnGestureListener mGestureListener; public BookLayout(Context context) { super(context);
Init(context);
} public BookLayout(Context context, AttributeSet attrs) { super(context, attrs);
Init(context);
} public BookLayout(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle);
Init(context);
} public void setPageAdapter(BookAdapter pa) {
Log.d(LOG_TAG, "setPageAdapter");
mPageAdapter = pa;
} public void Init(Context context) {
Log.d(LOG_TAG, "Init");
totalPageNum = 0;
mContext = context;
mSelectCorner = Corner.None;
mGestureListener = new BookOnGestureListener();
mGestureDetector = new GestureDetector(mGestureListener);
mGestureDetector.setIsLongpressEnabled(false);
aniEndHandle = new Handler(); this.setOnTouchListener(touchListener); this.setLongClickable(true);
} protected void dispatchDraw(Canvas canvas) {
Log.d(LOG_TAG, "dispatchDraw"); super.dispatchDraw(canvas); if (!hasInit) {
hasInit = true;
indexPage = 0; if (mPageAdapter == null) { throw new RuntimeException("please set the PageAdapter on init");
}
totalPageNum = mPageAdapter.getCount();
mainLayout = new LinearLayout(mContext);
mainLayout.setLayoutParams(new LayoutParams(contentWidth, contentHeight));
mainLayout.setBackgroundColor(0xffffffff);
mState = BookState.READY;
invisibleLayout = new LinearLayout(mContext);
invisibleLayout.setLayoutParams(new LayoutParams(contentWidth, contentHeight)); this.addView(invisibleLayout); this.addView(mainLayout);
mBookView = new BookView(mContext);
mBookView.setLayoutParams(new LayoutParams(contentWidth, contentHeight)); this.addView(mBookView);
updatePageView();
invalidate();
} else if (mState == BookState.READY) {
mBookView.update();
}
} /** * 此方法做过修改，改成一页显示 */ public void updatePageView() {
Log.d(LOG_TAG, "updatePageView"); if (indexPage < 0 || indexPage > totalPageNum - 1) { return;
}
invisibleLayout.removeAllViews();
mainLayout.removeAllViews(); /*当前页*/ currentPage = mPageAdapter.getView(indexPage); if(currentPage == null){
currentPage = new WhiteView(mContext);
}
currentPage.setLayoutParams(new LayoutParams(contentWidth,contentHeight));
mainLayout.addView(currentPage); /*背景页*/ middlePage = new WhiteView(mContext);
middlePage.setLayoutParams(new LayoutParams(contentWidth,contentHeight));
invisibleLayout.addView(middlePage); /*前一页*/ prevPage = null; if(indexPage>0){
prevPage = mPageAdapter.getView(indexPage-1);
} if(prevPage==null){
prevPage = new WhiteView(mContext);
}
prevPage.setLayoutParams(new LayoutParams(contentWidth,contentHeight));
invisibleLayout.addView(prevPage); /*后一页*/ nextPage = null; if(indexPage<totalPageNum-1){
nextPage = mPageAdapter.getView(indexPage + 1);
} if(nextPage==null){
nextPage = new WhiteView(mContext);
}
nextPage.setLayoutParams(new LayoutParams(contentWidth,contentHeight));
invisibleLayout.addView(nextPage);
Log.d(LOG_TAG, "updatePageView finish");
}
OnTouchListener touchListener = new OnTouchListener() { public boolean onTouch(View v, MotionEvent event) {
Log.d(LOG_TAG, "onTouch " + " x: " + event.getX() + " y: " + event.getY() + " mState:" + mState);
mGestureDetector.onTouchEvent(event); int action = event.getAction(); if (action == MotionEvent.ACTION_UP && mSelectCorner != Corner.None && mState == BookState.TRACKING) { if (mState == BookState.ANIMATING) return false; if(mSelectCorner == Corner.LeftTop){ if(scrollX<contentWidth/2){
aniStopPos = new Point(0,0);
}else{
aniStopPos = new Point(2*contentWidth,0);
}
}else if(mSelectCorner == Corner.RightTop){ if(scrollX<contentWidth/2){
aniStopPos = new Point(-contentWidth,0);
}else{
aniStopPos = new Point(contentWidth,0);
}
}else if(mSelectCorner == Corner.LeftBottom){ if(scrollX<contentWidth/2){
aniStopPos = new Point(0,contentHeight);
}else{
aniStopPos = new Point(2*contentWidth,contentHeight);
}
}else if(mSelectCorner == Corner.RightBottom){ if(scrollX<contentWidth/2){
aniStopPos = new Point(-contentWidth,contentHeight);
}else{
aniStopPos = new Point(contentWidth,contentHeight);
}
}
aniStartPos = new Point((int) scrollX, (int) scrollY);
aniTime = 800;
mState = BookState.ABOUT_TO_ANIMATE;
closeBook = true;
aniStartTime = new Date();
mBookView.startAnimation();
} return false;
}
}; class BookOnGestureListener implements OnGestureListener { public boolean onDown(MotionEvent event) {
Log.d(LOG_TAG, "onDown"); if (mState == BookState.ANIMATING) return false; float x = event.getX(), y = event.getY(); int w = contentWidth, h = contentHeight; if (x * x + y * y < clickCornerLen) { if (indexPage > 0) {
mSelectCorner = Corner.LeftTop;
aniStartPos = new Point(0, 0);
}
} else if ((x - w) * (x - w) + y * y < clickCornerLen) { if (indexPage < totalPageNum - 1) {
mSelectCorner = Corner.RightTop;
aniStartPos = new Point(contentWidth, 0);
}
} else if (x * x + (y - h) * (y - h) < clickCornerLen) { if (indexPage > 0) {
mSelectCorner = Corner.LeftBottom;
aniStartPos = new Point(0, contentHeight);
}
} else if ((x - w) * (x - w) + (y - h) * (y - h) < clickCornerLen) { if (indexPage < totalPageNum - 1) {
mSelectCorner = Corner.RightBottom;
aniStartPos = new Point(contentWidth, contentHeight);
}
} if (mSelectCorner != Corner.None) {
aniStopPos = new Point((int) x, (int) y);
aniTime = 800;
mState = BookState.ABOUT_TO_ANIMATE;
closeBook = false;
aniStartTime = new Date();
mBookView.startAnimation();
} return false;
} public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
Log.d(LOG_TAG, "onFling velocityX:" + velocityX + " velocityY:" + velocityY); if (mSelectCorner != Corner.None) { if (mSelectCorner == Corner.LeftTop) { if (velocityX < 0) {
aniStopPos = new Point(0, 0);
} else {
aniStopPos = new Point(2*contentWidth, 0);
}
}else if( mSelectCorner == Corner.RightTop){ if (velocityX < 0) {
aniStopPos = new Point(-contentWidth, 0);
} else {
aniStopPos = new Point(contentWidth, 0);
}
}else if (mSelectCorner == Corner.LeftBottom ) { if (velocityX < 0) {
aniStopPos = new Point(0, contentHeight);
} else {
aniStopPos = new Point(2*contentWidth, contentHeight);
}
}else if( mSelectCorner == Corner.RightBottom){ if (velocityX < 0) {
aniStopPos = new Point(-contentWidth, contentHeight);
} else {
aniStopPos = new Point(contentWidth, contentHeight);
}
}
Log.d(LOG_TAG, "onFling animate");
aniStartPos = new Point((int) scrollX, (int) scrollY);
aniTime = 1000;
mState = BookState.ABOUT_TO_ANIMATE;
closeBook = true;
aniStartTime = new Date();
mBookView.startAnimation();
} return false;
} public void onLongPress(MotionEvent e) {
Log.d(LOG_TAG, "onLongPress");
} public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
mState = BookState.TRACKING; if (mSelectCorner != Corner.None) {
scrollX = e2.getX();
scrollY = e2.getY();
mBookView.startAnimation();
} return false;
} public void onShowPress(MotionEvent e) {
Log.d(LOG_TAG, "onShowPress");
} public boolean onSingleTapUp(MotionEvent e) {
Log.d(LOG_TAG, "onSingleTapUp"); if (mSelectCorner != Corner.None) { if (mSelectCorner == Corner.LeftTop) { if (scrollX < contentWidth / 2) {
aniStopPos = new Point(0, 0);
} else {
aniStopPos = new Point(2*contentWidth, 0);
}
} else if(mSelectCorner == Corner.RightTop){ if (scrollX < contentWidth / 2) {
aniStopPos = new Point(-contentWidth, 0);
} else {
aniStopPos = new Point(contentWidth, 0);
}
}else if (mSelectCorner == Corner.LeftBottom) { if (scrollX < contentWidth / 2) {
aniStopPos = new Point(0, contentHeight);
} else {
aniStopPos = new Point(2*contentWidth, contentHeight);
}
}else if(mSelectCorner == Corner.RightBottom){ if (scrollX < contentWidth / 2) {
aniStopPos = new Point(-contentWidth, contentHeight);
} else {
aniStopPos = new Point(contentWidth, contentHeight);
}
}
aniStartPos = new Point((int) scrollX, (int) scrollY);
aniTime = 800;
mState = BookState.ABOUT_TO_ANIMATE;
closeBook = true;
aniStartTime = new Date();
mBookView.startAnimation();
} return false;
}
} protected void onFinishInflate() {
Log.d(LOG_TAG, "onFinishInflate"); super.onFinishInflate();
} protected void onLayout(boolean changed, int l, int t, int r, int b) { super.onLayout(changed, l, t, r, b);
contentWidth = this.getWidth();
contentHeight = this.getHeight(); if (contentWidth == 0)
contentWidth = defaultWidth; if (contentHeight == 0)
contentHeight = defaultHeight;
Log.d(LOG_TAG, "onLayout, width:" + contentWidth + " height:" + contentHeight);
} class BookView extends SurfaceView implements SurfaceHolder.Callback {
DrawThread dt;
SurfaceHolder surfaceHolder;
Paint mDarkPaint = new Paint();
Paint mPaint = new Paint();
Bitmap tmpBmp = Bitmap.createBitmap(contentWidth, contentHeight, Bitmap.Config.ARGB_8888);
Canvas mCanvas = new Canvas(tmpBmp);
Paint bmpPaint = new Paint();
Paint ivisiblePaint = new Paint(); public BookView(Context context) { super(context);
surfaceHolder = getHolder();
surfaceHolder.addCallback(this);
mDarkPaint.setColor(0x88000000);
Shader mLinearGradient = new LinearGradient(0, 0, contentWidth, 0, new int[] { 0x00000000, 0x33000000,
0x00000000 }, new float[] { 0.35f, 0.5f, 0.65f }, Shader.TileMode.MIRROR);
mPaint.setAntiAlias(true);
mPaint.setShader(mLinearGradient);
bmpPaint.setFilterBitmap(true);
bmpPaint.setAntiAlias(true);
ivisiblePaint.setAlpha(0);
ivisiblePaint.setFilterBitmap(true);
ivisiblePaint.setAntiAlias(true);
ivisiblePaint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
} public void startAnimation() { if (dt == null) {
Log.d(LOG_TAG, "startAnimation");
dt = new DrawThread(this, getHolder());
dt.start();
}
} public void stopAnimation() {
Log.d(LOG_TAG, "stopAnimation"); if (dt != null) {
dt.flag = false;
Thread t = dt;
dt = null;
t.interrupt();
}
} public void drawLT(Canvas canvas) { double dx = contentWidth - scrollX, dy = scrollY; double len = Math.sqrt(dx * dx + dy * dy); if (len > contentWidth) {
scrollX = (float)(contentWidth - contentWidth*dx/len);
scrollY = (float)(contentWidth*dy/len);
} double px = scrollX; double py = scrollY; double arc = 2 * Math.atan(py / px) * 180 / Math.PI;
Matrix m = new Matrix();
m.postTranslate(scrollX - contentWidth, scrollY);
m.postRotate((float) (arc), scrollX, scrollY);
middlePage.draw(mCanvas);
Paint ps = new Paint();
Shader lg1 = new LinearGradient(contentWidth , 0, contentWidth - (float) px, (float) py, new int[] {
0x00000000, 0x33000000, 0x00000000 }, new float[] { 0.35f, 0.5f, 0.65f }, Shader.TileMode.CLAMP);
ps.setShader(lg1);
mCanvas.drawRect(0, 0, contentWidth , contentHeight, ps);
canvas.drawBitmap(tmpBmp, m, bmpPaint);
prevPage.draw(mCanvas);
Shader lg2 = new LinearGradient(scrollX, scrollY, 0, 0, new int[] { 0x00000000, 0x33000000, 0x00000000 }, new float[] { 0.35f, 0.5f, 0.65f }, Shader.TileMode.CLAMP);
ps.setShader(lg2);
mCanvas.drawRect(0, 0, contentWidth , contentHeight, ps);
arc = arc * Math.PI / 360;
Path path = new Path(); double r = Math.sqrt(px * px + py * py); double p1 = r / (2 * Math.cos(arc)); double p2 = r / (2 * Math.sin(arc));
Log.d(LOG_TAG, "p1: " + p1 + " p2:" + p2); if (arc == 0) {
path.moveTo((float) p1, 0);
path.lineTo(contentWidth , 0);
path.lineTo(contentWidth , contentHeight);
path.lineTo((float) p1, contentHeight);
path.close();
} else if (p2 > contentHeight || p2 < 0) { double p3 = (p2 - contentHeight) * Math.tan(arc);
path.moveTo((float) p1, 0);
path.lineTo(contentWidth , 0);
path.lineTo(contentWidth , contentHeight);
path.lineTo((float) p3, contentHeight);
path.close();
} else {
path.moveTo((float) p1, 0);
path.lineTo(contentWidth , 0);
path.lineTo(contentWidth , contentHeight);
path.lineTo(0, contentHeight);
path.lineTo(0, (float) p2);
path.close();
}
mCanvas.drawPath(path, ivisiblePaint);
canvas.drawBitmap(tmpBmp, 0, 0, null);
} public void drawLB(Canvas canvas) { double dx = contentWidth - scrollX, dy = contentHeight-scrollY; double len = Math.sqrt(dx * dx + dy * dy); if (len > contentWidth ) {
scrollX = (float) (contentWidth-contentWidth * dx /len);
scrollY = (float) (contentHeight-contentWidth * dy / len);
} double px = scrollX; double py = contentHeight - scrollY; double arc = 2 * Math.atan(py / px) * 180 / Math.PI;
Matrix m = new Matrix();
m.postTranslate(scrollX - contentWidth , scrollY - contentHeight);
m.postRotate((float) (-arc), scrollX, scrollY);
middlePage.draw(mCanvas);
Paint ps = new Paint();
Shader lg1 = new LinearGradient(contentWidth , contentHeight, contentWidth - (float) px,
contentHeight - (float) py, new int[] { 0x00000000, 0x33000000, 0x00000000 }, new float[] { 0.35f,
0.5f, 0.65f }, Shader.TileMode.CLAMP);
ps.setShader(lg1);
mCanvas.drawRect(0, 0, contentWidth, contentHeight, ps);
canvas.drawBitmap(tmpBmp, m, bmpPaint);
prevPage.draw(mCanvas);
Shader lg2 = new LinearGradient(scrollX, scrollY, 0, contentHeight, new int[] { 0x00000000, 0x33000000,
0x00000000 }, new float[] { 0.35f, 0.5f, 0.65f }, Shader.TileMode.CLAMP);
ps.setShader(lg2);
mCanvas.drawRect(0, 0, contentWidth, contentHeight, ps);
arc = arc * Math.PI / 360;
Path path = new Path(); double r = Math.sqrt(px * px + py * py); double p1 = r / (2 * Math.cos(arc)); double p2 = r / (2 * Math.sin(arc));
Log.d(LOG_TAG, "p1: " + p1 + " p2:" + p2); if (arc == 0) {
path.moveTo((float) p1, 0);
path.lineTo(contentWidth , 0);
path.lineTo(contentWidth , contentHeight);
path.lineTo((float) p1, contentHeight);
path.close();
} else if (p2 > contentHeight || p2 < 0) { double p3 = (p2 - contentHeight) * Math.tan(arc);
path.moveTo((float) p3, 0);
path.lineTo(contentWidth , 0);
path.lineTo(contentWidth , contentHeight);
path.lineTo((float) p1, contentHeight);
path.close();
} else {
path.moveTo(0, 0);
path.lineTo(contentWidth , 0);
path.lineTo(contentWidth , contentHeight);
path.lineTo((float) p1, contentHeight);
path.lineTo(0, contentHeight - (float) p2);
path.close();
}
mCanvas.drawPath(path, ivisiblePaint);
canvas.drawBitmap(tmpBmp, 0, 0, null);
} public void drawRT(Canvas canvas) { double dx = scrollX , dy = scrollY; double len = Math.sqrt(dx * dx + dy * dy); if (len > contentWidth) {
scrollX = (float) (contentWidth * dx /len);
scrollY = (float) (contentWidth * dy / len);
} double px = contentWidth - scrollX; double py = scrollY; double arc = 2 * Math.atan(py / px) * 180 / Math.PI;
Matrix m = new Matrix();
m.postTranslate(scrollX, scrollY);
m.postRotate((float) (-arc), scrollX, scrollY);
middlePage.draw(mCanvas);
Paint ps = new Paint();
Shader lg1 = new LinearGradient(0, 0, (float) px, (float) py, new int[] { 0x00000000, 0x33000000,
0x00000000 }, new float[] { 0.35f, 0.5f, 0.65f }, Shader.TileMode.CLAMP);
ps.setShader(lg1);
mCanvas.drawRect(0, 0, contentWidth, contentHeight, ps);
canvas.drawBitmap(tmpBmp, m, bmpPaint);
nextPage.draw(mCanvas);
Shader lg2 = new LinearGradient(scrollX - contentWidth, scrollY, contentWidth, 0, new int[] {
0x00000000, 0x33000000, 0x00000000 }, new float[] { 0.35f, 0.5f, 0.65f }, Shader.TileMode.CLAMP);
ps.setShader(lg2);
mCanvas.drawRect(0, 0, contentWidth, contentHeight, ps);
arc = arc * Math.PI / 360;
Path path = new Path(); double r = Math.sqrt(px * px + py * py); double p1 = contentWidth - r / (2 * Math.cos(arc)); double p2 = r / (2 * Math.sin(arc));
Log.d(LOG_TAG, "p1: " + p1 + " p2:" + p2); if (arc == 0) {
path.moveTo(0, 0);
path.lineTo((float) p1, 0);
path.lineTo((float) p1, contentHeight);
path.lineTo(0, contentHeight);
path.close();
} else if (p2 > contentHeight || p2 < 0) { double p3 = contentWidth - (p2 - contentHeight) * Math.tan(arc);
path.moveTo(0, 0);
path.lineTo((float) p1, 0);
path.lineTo((float) p3, contentHeight);
path.lineTo(0, contentHeight);
path.close();
} else {
path.moveTo(0, 0);
path.lineTo((float) p1, 0);
path.lineTo(contentWidth , (float) p2);
path.lineTo(contentWidth , contentHeight);
path.lineTo(0, contentHeight);
path.close();
}
mCanvas.drawPath(path, ivisiblePaint);
canvas.drawBitmap(tmpBmp, 0 , 0, null);
} public void drawRB(Canvas canvas) { double dx = scrollX , dy = contentHeight - scrollY; double len = Math.sqrt(dx * dx + dy * dy); if (len > contentWidth ) {
scrollX = (float) (contentWidth * dx /len);
scrollY = (float) (contentHeight-contentWidth * dy / len);
} double px = contentWidth - scrollX; double py = contentHeight - scrollY; double arc = 2 * Math.atan(py / px) * 180 / Math.PI;
Matrix m = new Matrix();
m.postTranslate(scrollX, scrollY - contentHeight);
m.postRotate((float) (arc), scrollX, scrollY);
middlePage.draw(mCanvas);
Paint ps = new Paint();
Shader lg1 = new LinearGradient(0, contentHeight, (float) px, contentHeight - (float) py, new int[] {
0x00000000, 0x33000000, 0x00000000 }, new float[] { 0.35f, 0.5f, 0.65f }, Shader.TileMode.CLAMP);
ps.setShader(lg1);
mCanvas.drawRect(0, 0, contentWidth , contentHeight, ps);
canvas.drawBitmap(tmpBmp, m, bmpPaint);
nextPage.draw(mCanvas);
Shader lg2 = new LinearGradient(scrollX - contentWidth , scrollY, contentWidth , contentHeight, new int[] { 0x00000000, 0x33000000, 0x00000000 }, new float[] { 0.35f, 0.5f, 0.65f },
Shader.TileMode.CLAMP);
ps.setShader(lg2);
mCanvas.drawRect(0, 0, contentWidth , contentHeight, ps);
arc = arc * Math.PI / 360;
Path path = new Path(); double r = Math.sqrt(px * px + py * py); double p1 = contentWidth - r / (2 * Math.cos(arc)); double p2 = r / (2 * Math.sin(arc));
Log.d(LOG_TAG, "p1: " + p1 + " p2:" + p2); if (arc == 0) {
path.moveTo(0, 0);
path.lineTo((float) p1, 0);
path.lineTo((float) p1, contentHeight);
path.lineTo(0, contentHeight);
path.close();
} else if (p2 > contentHeight || p2 < 0) { double p3 = contentWidth - (p2 - contentHeight) * Math.tan(arc);
path.moveTo(0, 0);
path.lineTo((float) p3, 0);
path.lineTo((float) p1, contentHeight);
path.lineTo(0, contentHeight);
path.close();
} else {
path.moveTo(0, 0);
path.lineTo(contentWidth , 0);
path.lineTo(contentWidth , contentHeight - (float) p2);
path.lineTo((float) p1, contentHeight);
path.lineTo(0, contentHeight);
path.close();
}
mCanvas.drawPath(path, ivisiblePaint);
canvas.drawBitmap(tmpBmp, 0 , 0, null);
} public void drawPrevPageEnd(Canvas canvas) {
prevPage.draw(mCanvas);
canvas.drawBitmap(tmpBmp, 0, 0, null);
} public void drawNextPageEnd(Canvas canvas) {
nextPage.draw(mCanvas);
canvas.drawBitmap(tmpBmp, contentWidth, 0, null);
} public void drawPage(Canvas canvas) { if (mSelectCorner == Corner.LeftTop) {
Log.d(LOG_TAG, "click left top");
drawLT(canvas);
} else if (mSelectCorner == Corner.LeftBottom) {
Log.d(LOG_TAG, "click left bottom");
drawLB(canvas);
} else if (mSelectCorner == Corner.RightTop) {
Log.d(LOG_TAG, "click right top");
drawRT(canvas);
} else if (mSelectCorner == Corner.RightBottom) {
Log.d(LOG_TAG, "click right bottom");
drawRB(canvas);
}
} public void update() {
Canvas canvas = surfaceHolder.lockCanvas(null); try { synchronized (surfaceHolder) {
doDraw(canvas);
}
} catch (Exception e) {
e.printStackTrace();
} finally { if (canvas != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
} protected void doDraw(Canvas canvas) {
Log.d(LOG_TAG, "bookView doDraw");
mainLayout.draw(canvas);
} public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
} public void surfaceCreated(SurfaceHolder holder) {
update();
} public void surfaceDestroyed(SurfaceHolder holder) { if (dt != null) {
dt.flag = false;
dt = null;
}
}
} public boolean getAnimateData() {
Log.d(LOG_TAG, "getAnimateData"); long time = aniTime;
Date date = new Date(); long t = date.getTime() - aniStartTime.getTime();
t += timeOffset; if (t < 0 || t > time) {
mState = BookState.ANIMATE_END; return false;
} else {
mState = BookState.ANIMATING; double sx = aniStopPos.x - aniStartPos.x;
scrollX =(float)(sx*t/time+aniStartPos.x); double sy = aniStopPos.y-aniStartPos.y;
scrollY = (float)(sy*t/time+aniStartPos.y); return true;
}
} public void handleAniEnd(Canvas canvas) {
Log.d(LOG_TAG, "handleAniEnd"); if (closeBook) {
closeBook = false; if (mSelectCorner == Corner.LeftTop || mSelectCorner == Corner.LeftBottom) { if (scrollX > contentWidth / 2) {
indexPage -= 1;
mBookView.drawPrevPageEnd(canvas);
aniEndHandle.post(new Runnable() { public void run() {
updatePageView();
}
});
} else {
mBookView.doDraw(canvas);
}
} else if (mSelectCorner == Corner.RightTop || mSelectCorner == Corner.RightBottom) { if (scrollX < contentWidth / 2) {
indexPage += 1;
mBookView.drawNextPageEnd(canvas);
aniEndHandle.post(new Runnable() { public void run() {
updatePageView();
}
});
} else {
mBookView.doDraw(canvas);
}
}
mSelectCorner = Corner.None;
mState = BookState.READY;
} else {
mState = BookState.TRACKING;
}
mBookView.stopAnimation(); // aniEndHandle.post(new Runnable() { // public void run() { //// BookLayout.this.invalidate(); // } // }); } class WhiteView extends View { public WhiteView(Context context) { super(context);
} protected void onDraw(Canvas canvas) { super.onDraw(canvas);
canvas.drawColor(Color.WHITE);
}
} public class DrawThread extends Thread {
BookView bv;
SurfaceHolder surfaceHolder; boolean flag = false; int sleepSpan = 30; public DrawThread(BookView bv, SurfaceHolder surfaceHolder) { this.bv = bv; this.surfaceHolder = surfaceHolder; this.flag = true;
} public void run() {
Canvas canvas = null; while (flag) { try {
canvas = surfaceHolder.lockCanvas(null); if (canvas == null) continue; synchronized (surfaceHolder) { if (mState == BookState.ABOUT_TO_ANIMATE || mState == BookState.ANIMATING) {
bv.doDraw(canvas);
getAnimateData();
bv.drawPage(canvas);
} else if (mState == BookState.TRACKING) {
bv.doDraw(canvas);
bv.drawPage(canvas);
} else if (mState == BookState.ANIMATE_END) {
handleAniEnd(canvas);
}
}
} catch (Exception e) {
e.printStackTrace();
} finally { if (canvas != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
}
} try {
Thread.sleep(sleepSpan);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}BookState:
package com.xin.book.view; public enum BookState {
ABOUT_TO_ANIMATE, ANIMATING, ANIMATE_END, READY, TRACKING
}Corner:
package com.xin.book.view; public enum Corner {
LeftTop, RightTop, LeftBottom, RightBottom, None
}IAdapter:
package com.xin.book.view; import android.view.View; public interface IAdapter { public int getCount(); public String getItem(int position); public long getItemId(int position); public View getView(int position);
}IBook:
package com.xin.book.view; import android.view.View; public interface IBook { public View getView(int position); public int getCount();
}IListener:
package com.xin.book.view; public interface IListener { public void onPrevPage(); public void onNextPage(); public void onInit();
}实例2效果图:
完O(∩_∩)O~
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