Android-eBook翻书效果源码
翻页效果，导入源码即可运行。 package sf.hmg.turntest; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.ColorMatrix; import android.graphics.ColorMatrixColorFilter; import android.graphics.Matrix; 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; ColorMatrixColorFilter mColorMatrixFilter; Matrix mMatrix; float[] mMatrixArray = { 0, 0, 0, 0, 0, 0, 0, 0, 1.0f }; 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; Paint mPaint; 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); paint = new Paint(); mPaint = new Paint(); mPaint.setStyle(Paint.Style.FILL); mCurPageBitmap = BitmapFactory.decodeResource(this.getResources(), R.drawable.page1); mNextPageBitmap = BitmapFactory.decodeResource(this.getResources(), R.drawable.page2); ColorMatrix cm = new ColorMatrix(); float array[] = { 0.55f, 0, 0, 0, 80.0f, 0, 0.55f, 0, 0, 80.0f, 0, 0, 0.55f, 0, 80.0f, 0, 0, 0, 0.2f, 0 }; cm.set(array); mColorMatrixFilter = new ColorMatrixColorFilter(cm); mMatrix = new Matrix(); } /** * 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 : hmg25 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; // 当mBezierStart1.x < 0或者mBezierStart1.x > 480时 // 如果继续翻页，会出现BUG故在此限制 if (mBezierStart1.x < 0 || mBezierStart1.x > 480) { if (mBezierStart1.x < 0) mBezierStart1.x = mWidth - mBezierStart1.x; float f1 = Math.abs(mCornerX - mTouch.x); float f2 = mWidth * f1 / mBezierStart1.x; mTouch.x = Math.abs(mCornerX - f2); float f3 = Math.abs(mCornerX - mTouch.x) * Math.abs(mCornerY - mTouch.y) / f1; mTouch.y = Math.abs(mCornerY - f3); 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; } mBezierStart2.x = mCornerX; mBezierStart2.y = mBezierControl2.y - (mCornerY - mBezierControl2.y) / 2; 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; } 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)); int leftx; int rightx; GradientDrawable mBackShadowDrawable; if (mIsRTandLB) { leftx = (int) (mBezierStart1.x); rightx = (int) (mBezierStart1.x + mTouchToCornerDis / 4); mBackShadowDrawable = mBackShadowDrawableLR; } else { leftx = (int) (mBezierStart1.x - mTouchToCornerDis / 4); rightx = (int) mBezierStart1.x; mBackShadowDrawable = mBackShadowDrawableRL; } 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); drawCurrentBackArea(mCanvas, mCurPageBitmap); 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[] { 0x80111111, 0x111111 }; 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); } /** * Author : hmg25 Version: 1.0 Description : 绘制翻起页的阴影 */ public void drawCurrentPageShadow(Canvas canvas) { double degree; if (mIsRTandLB) { degree = Math.PI / 4 - Math.atan2(mBezierControl1.y - mTouch.y, mTouch.x - mBezierControl1.x); } else { degree = Math.PI / 4 - Math.atan2(mTouch.y - mBezierControl1.y, mTouch.x - mBezierControl1.x); } //翻起页阴影顶点与touch点的距离 double d1 = (float) 25 * 1.414 * Math.cos(degree); double d2 = (float) 25 * 1.414 * Math.sin(degree); float x = (float) (mTouch.x + d1); float y; if (mIsRTandLB) { y = (float) (mTouch.y + d2); } else { y = (float) (mTouch.y - d2); } 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 + 1; 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 - mMaxLength), 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 + 1); mCurrentPageShadow = mFrontShadowDrawableHBT; } rotateDegrees = (float) Math.toDegrees(Math.atan2(mBezierControl2.y - mTouch.y, mBezierControl2.x - mTouch.x)); canvas.rotate(rotateDegrees, mBezierControl2.x, mBezierControl2.y); float temp; if (mBezierControl2.y < 0) temp = mBezierControl2.y - 800; else temp = mBezierControl2.y; int hmg = (int) Math.hypot(mBezierControl2.x, temp); if (hmg > mMaxLength) mCurrentPageShadow .setBounds((int) (mBezierControl2.x - 25) - hmg, leftx, (int) (mBezierControl2.x + mMaxLength) - hmg, rightx); else mCurrentPageShadow.setBounds( (int) (mBezierControl2.x - mMaxLength), leftx, (int) (mBezierControl2.x), rightx); Log.i("hmg", "mBezierControl2.x " + mBezierControl2.x + " mBezierControl2.y " + mBezierControl2.y); mCurrentPageShadow.draw(canvas); canvas.restore(); } /** * Author : hmg25 Version: 1.0 Description : 绘制翻起页背面 */ private void drawCurrentBackArea(Canvas canvas, Bitmap bitmap) { int i = (int) (mBezierStart1.x + mBezierControl1.x) / 2; float f1 = Math.abs(i - mBezierControl1.x); int i1 = (int) (mBezierStart2.y + mBezierControl2.y) / 2; float f2 = Math.abs(i1 - mBezierControl2.y); float f3 = Math.min(f1, f2); mPath1.reset(); mPath1.moveTo(mBeziervertex2.x, mBeziervertex2.y); mPath1.lineTo(mBeziervertex1.x, mBeziervertex1.y); mPath1.lineTo(mBezierEnd1.x, mBezierEnd1.y); mPath1.lineTo(mTouch.x, mTouch.y); mPath1.lineTo(mBezierEnd2.x, mBezierEnd2.y); mPath1.close(); GradientDrawable mFolderShadowDrawable; int left; int right; if (mIsRTandLB) { left = (int) (mBezierStart1.x - 1); right = (int) (mBezierStart1.x + f3 + 1); mFolderShadowDrawable = mFolderShadowDrawableLR; } else { left= (int) (mBezierStart1.x - f3 - 1); right= (int) (mBezierStart1.x + 1); mFolderShadowDrawable = mFolderShadowDrawableRL; } canvas.save(); canvas.clipPath(mPath0); canvas.clipPath(mPath1, Region.Op.INTERSECT); mPaint.setColorFilter(mColorMatrixFilter); float dis = (float) Math.hypot(mCornerX - mBezierControl1.x, mBezierControl2.y - mCornerY); float f8 = (mCornerX - mBezierControl1.x) / dis; float f9 = (mBezierControl2.y - mCornerY) / dis; mMatrixArray[0] = 1 - 2 * f9 * f9; mMatrixArray[1] = 2 * f8 * f9; mMatrixArray[3] = mMatrixArray[1]; mMatrixArray[4] = 1 - 2 * f8 * f8; mMatrix.reset(); mMatrix.setValues(mMatrixArray); mMatrix.preTranslate(-mBezierControl1.x, -mBezierControl1.y); mMatrix.postTranslate(mBezierControl1.x, mBezierControl1.y); canvas.drawBitmap(bitmap, mMatrix, mPaint); // canvas.drawBitmap(bitmap, mMatrix, null); mPaint.setColorFilter(null); canvas.rotate(mDegrees, mBezierStart1.x, mBezierStart1.y); mFolderShadowDrawable.setBounds(left, (int) mBezierStart1.y, right, (int) (mBezierStart1.y + mMaxLength)); mFolderShadowDrawable.draw(canvas); canvas.restore(); } }
