完美解决android 翻页效果

package com.docin.nil; import java.lang.ref.WeakReference; import java.util.ArrayList; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.Rect; import android.graphics.Paint.Style; import android.os.Handler; import android.os.Message; import android.text.TextPaint; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View; /** * @author Moritz 'Moss' Wundke (b.thax.dcg@gmail.com) */ /** * 原作者代码如下: svn checkout code.google.com/p/android-page-curl/ * * @note 原代码内容写得太死,无法广泛用于阅读器等应用! * @author 陆再谋 (Nil Lu) * @date 2012.3.6 * @contact QQ:1351231599 email:synwith@gmail.com */ public class PageCurlView extends View { private final static String TAG = "PageCurlView"; private Paint mTextPaint; private TextPaint mTextPaintShadow; /** Px / Draw call */ private int mCurlSpeed; /** Fixed update time used to create a smooth curl animation */ private int mUpdateRate; /** The initial offset for x and y axis movements */ private int mInitialEdgeOffset; /** The mode we will use */ private int mCurlMode; /** Simple curl mode. Curl target will move only in one axis. */ public static final int CURLMODE_SIMPLE = 0; /** Dynamic curl mode. Curl target will move on both X and Y axis. */ public static final int CURLMODE_DYNAMIC = 1; /** Enable/Disable debug mode */ private boolean bEnableDebugMode = false; /** The context which owns us */ private WeakReference<Context> mContext; /** Handler used to auto flip time based */ private FlipAnimationHandler mAnimationHandler; /** Maximum radius a page can be flipped, by default it's the width of the view */ private float mFlipRadius; /** Point used to move */ private Vector2D mMovement; /** The finger position */ private Vector2D mFinger; /** Movement point form the last frame */ private Vector2D mOldMovement; /** Page curl edge */ private Paint mCurlEdgePaint; /** Our points used to define the current clipping paths in our draw call */ private Vector2D mA, mB, mC, mD, mE, mF, mOldF, mOrigin; /** If false no draw call has been done */ private boolean bViewDrawn; /** Defines the flip direction that is currently considered */ private boolean bFlipRight; /** If TRUE we are currently auto-flipping */ private boolean bFlipping; /** Used to control touch input blocking */ private boolean bBlockTouchInput = false; /** Enable input after the next draw event */ private boolean bEnableInputAfterDraw = false; /** * 加入一个表示正在做翻页操作,但是没放下手指 */ private static int RIGHT_TAG = -1; private static int LEFT_TAG = -1; private boolean bFirstPage = false; /** LAGACY List of pages, this is just temporal */ private ArrayList<Bitmap> mPages; private String mPageCurrString = ""; private Bitmap mBackGroudBitmap = null; private ArrayList<String> mContentList = new ArrayList<String>(); /** LAGACY Current selected page */ private int mIndex = 0; /** * Inner class used to represent a 2D point. */ private class Vector2D { public float x, y; public Vector2D(float x, float y) { this.x = x; this.y = y; } @Override public String toString() { // TODO Auto-generated method stub return "(" + this.x + "," + this.y + ")"; } public float length() { return (float) Math.sqrt(x * x + y * y); } public float lengthSquared() { return (x * x) + (y * y); } public boolean equals(Object o) { if (o instanceof Vector2D) { Vector2D p = (Vector2D) o; return p.x == x && p.y == y; } return false; } public Vector2D reverse() { return new Vector2D(-x, -y); } public Vector2D sum(Vector2D b) { return new Vector2D(x + b.x, y + b.y); } public Vector2D sub(Vector2D b) { return new Vector2D(x - b.x, y - b.y); } public float dot(Vector2D vec) { return (x * vec.x) + (y * vec.y); } public float cross(Vector2D a, Vector2D b) { return a.cross(b); } public float cross(Vector2D vec) { return x * vec.y - y * vec.x; } public float distanceSquared(Vector2D other) { float dx = other.x - x; float dy = other.y - y; return (dx * dx) + (dy * dy); } public float distance(Vector2D other) { return (float) Math.sqrt(distanceSquared(other)); } public float dotProduct(Vector2D other) { return other.x * x + other.y * y; } public Vector2D normalize() { float magnitude = (float) Math.sqrt(dotProduct(this)); return new Vector2D(x / magnitude, y / magnitude); } public Vector2D mult(float scalar) { return new Vector2D(x * scalar, y * scalar); } } /** * Inner class used to make a fixed timed animation of the curl effect. */ class FlipAnimationHandler extends Handler { @Override public void handleMessage(Message msg) { PageCurlView.this.FlipAnimationStep(); } public void sleep(long millis) { this.removeMessages(0); sendMessageDelayed(obtainMessage(0), millis); } } /** * Base * * @param context */ public PageCurlView(Context context) { super(context); init(context); ResetClipEdge(); } /** * Construct the object from an XML file. Valid Attributes: * * @see android.view.View#View(android.content.Context, android.util.AttributeSet) */ public PageCurlView(Context context, AttributeSet attrs) { super(context, attrs); init(context); // Get the data from the XML AttributeSet { TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PageCurlView); // Get data bEnableDebugMode = a.getBoolean( R.styleable.PageCurlView_enableDebugMode, bEnableDebugMode); bEnableDebugMode = false; mCurlSpeed = a.getInt(R.styleable.PageCurlView_curlSpeed, mCurlSpeed); mUpdateRate = a.getInt(R.styleable.PageCurlView_updateRate, mUpdateRate); mInitialEdgeOffset = a.getInt( R.styleable.PageCurlView_initialEdgeOffset, mInitialEdgeOffset); mCurlMode = a.getInt(R.styleable.PageCurlView_curlMode, mCurlMode); Log.i(TAG, "mCurlSpeed: " + mCurlSpeed); Log.i(TAG, "mUpdateRate: " + mUpdateRate); Log.i(TAG, "mInitialEdgeOffset: " + mInitialEdgeOffset); Log.i(TAG, "mCurlMode: " + mCurlMode); // recycle object (so it can be used by others) a.recycle(); } ResetClipEdge(); } /** * Initialize the view */ private final void init(Context context) { // Foreground text paint mTextPaint = new Paint(); mTextPaint.setAntiAlias(true); mTextPaint.setTextSize(16); mTextPaint.setColor(0xFF000000); // The shadow mTextPaintShadow = new TextPaint(); mTextPaintShadow.setAntiAlias(true); mTextPaintShadow.setTextSize(16); mTextPaintShadow.setColor(0x00000000); // Cache the context mContext = new WeakReference<Context>(context); // Base padding setPadding(3, 3, 3, 3); // The focus flags are needed setFocusable(true); setFocusableInTouchMode(true); mMovement = new Vector2D(0, 0); mFinger = new Vector2D(0, 0); mOldMovement = new Vector2D(0, 0); // Create our curl animation handler mAnimationHandler = new FlipAnimationHandler(); // Create our edge paint mCurlEdgePaint = new Paint(); mCurlEdgePaint.setColor(Color.WHITE); mCurlEdgePaint.setAntiAlias(true); mCurlEdgePaint.setStyle