JazzyViewPager开源项目的简析及使用

 

JazzyViewPager是一个重写的ViewPager，能是ViewPager滑动起来更加的炫酷。

开源地址：https://github.com/jfeinstein10/JazzyViewPager

使用的项目如下：

JazzyViewPager   组件类

package com.hsx.test.jazzy;

import java.util.HashMap;
import java.util.LinkedHashMap;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Camera;
import android.graphics.Color;
import android.graphics.Matrix;
import android.os.Build;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;

import com.hsx.test.R;
import com.nineoldandroids.view.ViewHelper;

public class JazzyViewPager extends ViewPager {

    public static final String TAG = "JazzyViewPager";

    private boolean mEnabled = true;
    private boolean mFadeEnabled = false;
    private boolean mOutlineEnabled = false;
    public static int sOutlineColor = Color.WHITE;
    private TransitionEffect mEffect = TransitionEffect.Standard;
    
    private HashMap<Integer, Object> mObjs = new LinkedHashMap<Integer, Object>();

    private static final float SCALE_MAX = 0.5f;
    private static final float ZOOM_MAX = 0.5f;
    private static final float ROT_MAX = 15.0f;

    public enum TransitionEffect {
        Standard,
        Tablet,
        CubeIn,
        CubeOut,
        FlipVertical,
        FlipHorizontal,
        Stack,
        ZoomIn,
        ZoomOut,
        RotateUp,
        RotateDown,
        Accordion
    }

    private static final boolean API_11;
    static {
        API_11 = Build.VERSION.SDK_INT >= 11;
    }

    public JazzyViewPager(Context context) {
        this(context, null);
    }

    @SuppressWarnings("incomplete-switch")
    public JazzyViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
        setClipChildren(false);
        TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.JazzyViewPager);
        int effect = ta.getInt(R.styleable.JazzyViewPager_style, 0);
        String[] transitions = getResources().getStringArray(R.array.jazzy_effects);
        setTransitionEffect(TransitionEffect.valueOf(transitions[effect]));
        setFadeEnabled(ta.getBoolean(R.styleable.JazzyViewPager_fadeEnabled, false));
        setOutlineEnabled(ta.getBoolean(R.styleable.JazzyViewPager_outlineEnabled, false));
        setOutlineColor(ta.getColor(R.styleable.JazzyViewPager_outlineColor, Color.WHITE));
        switch (mEffect) {
        case Stack:
        case ZoomOut:
            setFadeEnabled(true);
        }
        ta.recycle();
    }

    public void setTransitionEffect(TransitionEffect effect) {
        mEffect = effect;
    }

    public void setPagingEnabled(boolean enabled) {
        mEnabled = enabled;
    }

    public void setFadeEnabled(boolean enabled) {
        mFadeEnabled = enabled;
    }
    
    public boolean getFadeEnabled() {
        return mFadeEnabled;
    }

    public void setOutlineEnabled(boolean enabled) {
        mOutlineEnabled = enabled;
        wrapWithOutlines();
    }

    public void setOutlineColor(int color) {
        sOutlineColor = color;
    }

    private void wrapWithOutlines() {
        for (int i = 0; i < getChildCount(); i++) {
            View v = getChildAt(i);
            if (!(v instanceof OutlineContainer)) {
                removeView(v);
                super.addView(wrapChild(v), i);
            }
        }
    }

    private View wrapChild(View child) {
        if (!mOutlineEnabled || child instanceof OutlineContainer) return child;
        OutlineContainer out = new OutlineContainer(getContext());
        out.setLayoutParams(generateDefaultLayoutParams());
        child.setLayoutParams(new OutlineContainer.LayoutParams(
                LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        out.addView(child);
        return out;
    }

    public void addView(View child) {
        super.addView(wrapChild(child));
    }

    public void addView(View child, int index) {
        super.addView(wrapChild(child), index);
    }

    public void addView(View child, LayoutParams params) {
        super.addView(wrapChild(child), params);
    }

    public void addView(View child, int width, int height) {
        super.addView(wrapChild(child), width, height);
    }

    public void addView(View child, int index, LayoutParams params) {
        super.addView(wrapChild(child), index, params);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent arg0) {
        return mEnabled ? super.onInterceptTouchEvent(arg0) : false;
    }

    private State mState;
    private int oldPage;

    private View mLeft;
    private View mRight;
    private float mRot;
    private float mTrans;
    private float mScale;

    private enum State {
        IDLE,
        GOING_LEFT,
        GOING_RIGHT
    }
    
 
    private void logState(View v, String title) {
        Log.v(TAG, title + ": ROT (" + ViewHelper.getRotation(v) + ", " +
                ViewHelper.getRotationX(v) + ", " +
                ViewHelper.getRotationY(v) + "), TRANS (" +
                ViewHelper.getTranslationX(v) + ", " +
                ViewHelper.getTranslationY(v) + "), SCALE (" +
                ViewHelper.getScaleX(v) + ", " + 
                ViewHelper.getScaleY(v) + "), ALPHA " +
                ViewHelper.getAlpha(v));
    }

    protected void animateScroll(int position, float positionOffset) {
        if (mState != State.IDLE) {
            mRot = (float)(1-Math.cos(2*Math.PI*positionOffset))/2*30.0f;
            ViewHelper.setRotationY(this, mState == State.GOING_RIGHT ? mRot : -mRot);
            ViewHelper.setPivotX(this, getMeasuredWidth()*0.5f);
            ViewHelper.setPivotY(this, getMeasuredHeight()*0.5f);
        }
    }

    protected void animateTablet(View left, View right, float positionOffset) {        
        if (mState != State.IDLE) {
            if (left != null) {
                manageLayer(left, true);
                mRot = 30.0f * positionOffset;
                mTrans = getOffsetXForRotation(mRot, left.getMeasuredWidth(),
                        left.getMeasuredHeight());
                ViewHelper.setPivotX(left, left.getMeasuredWidth()/2);
                ViewHelper.setPivotY(left, left.getMeasuredHeight()/2);
                ViewHelper.setTranslationX(left, mTrans);
                ViewHelper.setRotationY(left, mRot);
                logState(left, "Left");
            }
            if (right != null) {
                manageLayer(right, true);
                mRot = -30.0f * (1-positionOffset);
                mTrans = getOffsetXForRotation(mRot, right.getMeasuredWidth(), 
                        right.getMeasuredHeight());
                ViewHelper.setPivotX(right, right.getMeasuredWidth()*0.5f);
                ViewHelper.setPivotY(right, right.getMeasuredHeight()*0.5f);
                ViewHelper.setTranslationX(right, mTrans);
                ViewHelper.setRotationY(right, mRot);
                logState(right, "Right");
            }
        }
    }

    private void animateCube(View left, View right, float positionOffset, boolean in) {
        if (mState != State.IDLE) {
            if (left != null) {
                manageLayer(left, true);
                mRot = (in ? 90.0f : -90.0f) * positionOffset;
                ViewHelper.setPivotX(left, left.getMeasuredWidth());
                ViewHelper.setPivotY(left, left.getMeasuredHeight()*0.5f);
                ViewHelper.setRotationY(left, mRot);
            }
            if (right != null) {
                manageLayer(right, true);
                mRot = -(in ? 90.0f : -90.0f) * (1-positionOffset);
                ViewHelper.setPivotX(right, 0);
                ViewHelper.setPivotY(right, right.getMeasuredHeight()*0.5f);
                ViewHelper.setRotationY(right, mRot);
            }
        }
    }

    private void animateAccordion(View left, View right, float positionOffset) {
        if (mState != State.IDLE) {
            if (left != null) {
                manageLayer(left, true);
                ViewHelper.setPivotX(left, left.getMeasuredWidth());
                ViewHelper.setPivotY(left, 0);
                ViewHelper.setScaleX(left, 1-positionOffset);
            }
            if (right != null) {
                manageLayer(right, true);
                ViewHelper.setPivotX(right, 0);
                ViewHelper.setPivotY(right, 0);
                ViewHelper.setScaleX(right, positionOffset);
            }
        }
    }

    private void animateZoom(View left, View right, float positionOffset, boolean in) {
        if (mState != State.IDLE) {
            if (left != null) {
                manageLayer(left, true);
                mScale = in ? ZOOM_MAX + (1-ZOOM_MAX)*(1-positionOffset) :
                    1+ZOOM_MAX - ZOOM_MAX*(1-positionOffset);
                ViewHelper.setPivotX(left, left.getMeasuredWidth()*0.5f);
                ViewHelper.setPivotY(left, left.getMeasuredHeight()*0.5f);
                ViewHelper.setScaleX(left, mScale);
                ViewHelper.setScaleY(left, mScale);
            }
            if (right != null) {
                manageLayer(right, true);
                mScale = in ? ZOOM_MAX + (1-ZOOM_MAX)*positionOffset :
                    1+ZOOM_MAX - ZOOM_MAX*positionOffset;
                ViewHelper.setPivotX(right, right.getMeasuredWidth()*0.5f);
                ViewHelper.setPivotY(right, right.getMeasuredHeight()*0.5f);
                ViewHelper.setScaleX(right, mScale);
                ViewHelper.setScaleY(right, mScale);
            }
        }
    }

    private void animateRotate(View left, View right, float positionOffset, boolean up) {
        if (mState != State.IDLE) {
            if (left != null) {
                manageLayer(left, true);
                mRot = (up ? 1 : -1) * (ROT_MAX * positionOffset);
                mTrans = (up ? -1 : 1) * (float) (getMeasuredHeight() - getMeasuredHeight()*Math.cos(mRot*Math.PI/180.0f));
                ViewHelper.setPivotX(left, left.getMeasuredWidth()*0.5f);
                ViewHelper.setPivotY(left, up ? 0 : left.getMeasuredHeight());
                ViewHelper.setTranslationY(left, mTrans);
                ViewHelper.setRotation(left, mRot);
            }
            if (right != null) {
                manageLayer(right, true);
                mRot = (up ? 1 : -1) * (-ROT_MAX + ROT_MAX*positionOffset);
                mTrans = (up ? -1 : 1) * (float) (getMeasuredHeight() - getMeasuredHeight()*Math.cos(mRot*Math.PI/180.0f));
                ViewHelper.setPivotX(right, right.getMeasuredWidth()*0.5f);
                ViewHelper.setPivotY(right, up ? 0 : right.getMeasuredHeight());
                ViewHelper.setTranslationY(right, mTrans);
                ViewHelper.setRotation(right, mRot);
            }
        }
    }

    private void animateFlipHorizontal(View left, View right, float positionOffset, int positionOffsetPixels) {
        if (mState != State.IDLE) {
            if (left != null) {
                manageLayer(left, true);
                mRot = 180.0f * positionOffset;
                if (mRot > 90.0f) {
                    left.setVisibility(View.INVISIBLE);
                } else {
                    if (left.getVisibility() == View.INVISIBLE)
                        left.setVisibility(View.VISIBLE);
                    mTrans = positionOffsetPixels;
                    ViewHelper.setPivotX(left, left.getMeasuredWidth()*0.5f);
                    ViewHelper.setPivotY(left, left.getMeasuredHeight()*0.5f);
                    ViewHelper.setTranslationX(left, mTrans);
                    ViewHelper.setRotationY(left, mRot);
                }
            }
            if (right != null) {
                manageLayer(right, true);
                mRot = -180.0f * (1-positionOffset);
                if (mRot < -90.0f) {
                    right.setVisibility(View.INVISIBLE);
                } else {
                    if (right.getVisibility() == View.INVISIBLE)
                        right.setVisibility(View.VISIBLE);
                    mTrans = -getWidth()-getPageMargin()+positionOffsetPixels;
                    ViewHelper.setPivotX(right, right.getMeasuredWidth()*0.5f);
                    ViewHelper.setPivotY(right, right.getMeasuredHeight()*0.5f);
                    ViewHelper.setTranslationX(right, mTrans);
                    ViewHelper.setRotationY(right, mRot);
                }
            }
        }
    }
    
    private void animateFlipVertical(View left, View right, float positionOffset, int positionOffsetPixels) {
        if(mState != State.IDLE) {
            if (left != null) {
                manageLayer(left, true);
                mRot = 180.0f * positionOffset;
                if (mRot > 90.0f) {
                    left.setVisibility(View.INVISIBLE);
                } else {
                    if (left.getVisibility() == View.INVISIBLE)
                        left.setVisibility(View.VISIBLE);
                    mTrans = positionOffsetPixels;
                    ViewHelper.setPivotX(left, left.getMeasuredWidth()*0.5f);
                    ViewHelper.setPivotY(left, left.getMeasuredHeight()*0.5f);
                    ViewHelper.setTranslationX(left, mTrans);
                    ViewHelper.setRotationX(left, mRot);
                }
            }
            if (right != null) {
                manageLayer(right, true);
                mRot = -180.0f * (1-positionOffset);
                if (mRot < -90.0f) {
                    right.setVisibility(View.INVISIBLE);
                } else {
                    if (right.getVisibility() == View.INVISIBLE)
                        right.setVisibility(View.VISIBLE);
                    mTrans = -getWidth()-getPageMargin()+positionOffsetPixels;
                    ViewHelper.setPivotX(right, right.getMeasuredWidth()*0.5f);
                    ViewHelper.setPivotY(right, right.getMeasuredHeight()*0.5f);
                    ViewHelper.setTranslationX(right, mTrans);
                    ViewHelper.setRotationX(right, mRot);
                }
            }
        }
    }

    protected void animateStack(View left, View right, float positionOffset, int positionOffsetPixels) {        
        if (mState != State.IDLE) {
            if (right != null) {
                manageLayer(right, true);
                mScale = (1-SCALE_MAX) * positionOffset + SCALE_MAX;
                mTrans = -getWidth()-getPageMargin()+positionOffsetPixels;
                ViewHelper.setScaleX(right, mScale);
                ViewHelper.setScaleY(right, mScale);
                ViewHelper.setTranslationX(right, mTrans);
            }
            if (left != null) {
                left.bringToFront();
            }
        }
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    private void manageLayer(View v, boolean enableHardware) {
        if (!API_11) return;
        int layerType = enableHardware ? View.LAYER_TYPE_HARDWARE : View.LAYER_TYPE_NONE;
        if (layerType != v.getLayerType())
            v.setLayerType(layerType, null);
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    private void disableHardwareLayer() {
        if (!API_11) return;
        View v;
        for (int i = 0; i < getChildCount(); i++) {
            v = getChildAt(i);
            if (v.getLayerType() != View.LAYER_TYPE_NONE)
                v.setLayerType(View.LAYER_TYPE_NONE, null);
        }
    }

    private Matrix mMatrix = new Matrix();
    private Camera mCamera = new Camera();
    private float[] mTempFloat2 = new float[2];

    protected float getOffsetXForRotation(float degrees, int width, int height) {
        mMatrix.reset();
        mCamera.save();
        mCamera.rotateY(Math.abs(degrees));
        mCamera.getMatrix(mMatrix);
        mCamera.restore();

        mMatrix.preTranslate(-width * 0.5f, -height * 0.5f);
        mMatrix.postTranslate(width * 0.5f, height * 0.5f);
        mTempFloat2[0] = width;
        mTempFloat2[1] = height;
        mMatrix.mapPoints(mTempFloat2);
        return (width - mTempFloat2[0]) * (degrees > 0.0f ? 1.0f : -1.0f);
    }

    protected void animateFade(View left, View right, float positionOffset) {
        if (left != null) {
            ViewHelper.setAlpha(left, 1-positionOffset);
        }
        if (right != null) {
            ViewHelper.setAlpha(right, positionOffset);
        }
    }

    protected void animateOutline(View left, View right) {
        if (!(left instanceof OutlineContainer))
            return;
        if (mState != State.IDLE) {
            if (left != null) {
                manageLayer(left, true);
                ((OutlineContainer)left).setOutlineAlpha(1.0f);
            }
            if (right != null) {
                manageLayer(right, true);
                ((OutlineContainer)right).setOutlineAlpha(1.0f);
            }
        } else {
            if (left != null)
                ((OutlineContainer)left).start();
            if (right != null)
                ((OutlineContainer)right).start();
        }
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        if (mState == State.IDLE && positionOffset > 0) {
            oldPage = getCurrentItem();
            mState = position == oldPage ? State.GOING_RIGHT : State.GOING_LEFT;
        }
        boolean goingRight = position == oldPage;                
        if (mState == State.GOING_RIGHT && !goingRight)
            mState = State.GOING_LEFT;
        else if (mState == State.GOING_LEFT && goingRight)
            mState = State.GOING_RIGHT;

        float effectOffset = isSmall(positionOffset) ? 0 : positionOffset;
        
//        mLeft = getChildAt(position);
//        mRight = getChildAt(position+1);
        mLeft = findViewFromObject(position);
        mRight = findViewFromObject(position+1);
        
        if (mFadeEnabled)
            animateFade(mLeft, mRight, effectOffset);
        if (mOutlineEnabled)
            animateOutline(mLeft, mRight);
        
        switch (mEffect) {
        case Standard:
            break;
        case Tablet:
            animateTablet(mLeft, mRight, effectOffset);
            break;
        case CubeIn:
            animateCube(mLeft, mRight, effectOffset, true);
            break;
        case CubeOut:
            animateCube(mLeft, mRight, effectOffset, false);
            break;
        case FlipVertical:
            animateFlipVertical(mLeft, mRight, positionOffset, positionOffsetPixels);
            break;
        case FlipHorizontal:
            animateFlipHorizontal(mLeft, mRight, effectOffset, positionOffsetPixels);
        case Stack:
            animateStack(mLeft, mRight, effectOffset, positionOffsetPixels);
            break;
        case ZoomIn:
            animateZoom(mLeft, mRight, effectOffset, true);
            break;
        case ZoomOut:
            animateZoom(mLeft, mRight, effectOffset, false);
            break;
        case RotateUp:
            animateRotate(mLeft, mRight, effectOffset, true);
            break;
        case RotateDown:
            animateRotate(mLeft, mRight, effectOffset, false);
            break;
        case Accordion:
            animateAccordion(mLeft, mRight, effectOffset);
            break;
        }

        super.onPageScrolled(position, positionOffset, positionOffsetPixels);

        if (effectOffset == 0) {
            disableHardwareLayer();
            mState = State.IDLE;
        }

    }

    private boolean isSmall(float positionOffset) {
        return Math.abs(positionOffset) < 0.0001;
    }
    
    public void setObjectForPosition(Object obj, int position) {
        mObjs.put(Integer.valueOf(position), obj);
    }
    
    public View findViewFromObject(int position) {
        Object o = mObjs.get(Integer.valueOf(position));
        if (o == null) {
            return null;
        }
        PagerAdapter a = getAdapter();
        View v;
        for (int i = 0; i < getChildCount(); i++) {
            v = getChildAt(i);
            if (a.isViewFromObject(v, o))
                return v;
        }
        return null;
    }
    
}

OutlineContainer  容器类 ，负责装载内容的

package com.hsx.test.jazzy;

import com.hsx.test.R;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Rect;
import android.graphics.drawable.Animatable;
import android.util.AttributeSet;
import android.view.animation.AnimationUtils;
import android.view.animation.Interpolator;
import android.widget.FrameLayout;

public class OutlineContainer extends FrameLayout implements Animatable {

    private Paint mOutlinePaint;
    
    private boolean mIsRunning = false;
    private long mStartTime;
    private float mAlpha = 1.0f;
    private static final long ANIMATION_DURATION = 500;
    private static final long FRAME_DURATION = 1000 / 60;
    private final Interpolator mInterpolator = new Interpolator() {
        public float getInterpolation(float t) {
            t -= 1.0f;
            return t * t * t + 1.0f;
        }
    };

    public OutlineContainer(Context context) {
        super(context);
        init();
    }
    public OutlineContainer(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }
    public OutlineContainer(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    private void init() {
        mOutlinePaint = new Paint();
        mOutlinePaint.setAntiAlias(true);
        mOutlinePaint.setStrokeWidth(Util.dpToPx(getResources(), 2));
        mOutlinePaint.setColor(getResources().getColor(R.color.holo_blue));
        mOutlinePaint.setStyle(Style.STROKE);

        int padding = Util.dpToPx(getResources(), 10);
        setPadding(padding, padding, padding, padding);
    }

    @Override
    protected void dispatchDraw(Canvas canvas) {
        super.dispatchDraw(canvas);
        int offset = Util.dpToPx(getResources(), 5);
        if (mOutlinePaint.getColor() != JazzyViewPager.sOutlineColor) {
            mOutlinePaint.setColor(JazzyViewPager.sOutlineColor);
        }
        mOutlinePaint.setAlpha((int)(mAlpha * 255));
        Rect rect = new Rect(offset, offset, getMeasuredWidth()-offset, getMeasuredHeight()-offset);
        canvas.drawRect(rect, mOutlinePaint);
    }
    
    public void setOutlineAlpha(float alpha) {
        mAlpha = alpha;
    }

    @Override
    public boolean isRunning() {
        return mIsRunning;
    }

    @Override
    public void start() {
        if (mIsRunning)
            return;
        mIsRunning = true;
        mStartTime = AnimationUtils.currentAnimationTimeMillis();    
        post(mUpdater);
    }

    @Override
    public void stop() {
        if (!mIsRunning)
            return;
        mIsRunning = false;
    }
    
    private final Runnable mUpdater = new Runnable() {
        @Override
        public void run() {
            long now = AnimationUtils.currentAnimationTimeMillis();
            long duration = now - mStartTime;
            if (duration >= ANIMATION_DURATION) {
                mAlpha = 0.0f;
                invalidate();
                stop();
                return;
            } else {
                mAlpha = mInterpolator.getInterpolation(1 - duration / (float) ANIMATION_DURATION);
                invalidate();
            }
            postDelayed(mUpdater, FRAME_DURATION);
        }
    };

}

Util    辅助类

package com.hsx.test.jazzy;

import android.content.res.Resources;
import android.util.TypedValue;

public class Util {

    public static int dpToPx(Resources res, int dp) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, res.getDisplayMetrics());
    }

}

Activity

package com.hsx.test;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import com.hsx.test.jazzy.JazzyViewPager;
import com.hsx.test.jazzy.JazzyViewPager.TransitionEffect;
import com.hsx.test.jazzy.OutlineContainer;

public class MainActivity extends Activity {
    private JazzyViewPager mJazzy;
    Integer[] mImg = { R.drawable.a, R.drawable.b, R.drawable.c, R.drawable.d };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setupJazziness(TransitionEffect.Tablet);
    }

    private void setupJazziness(TransitionEffect effect) {
        mJazzy = (JazzyViewPager) findViewById(R.id.jazzy_pager);
        mJazzy.setTransitionEffect(effect);
        mJazzy.setAdapter(new MyAdapter());
        // mJazzy.setPageMargin(30);
    }

    private class MyAdapter extends PagerAdapter {
        @Override
        public Object instantiateItem(ViewGroup container, final int position) {
            ImageView imageView = new ImageView(MainActivity.this);
            imageView.setBackgroundResource(mImg[position]);
            container.addView(imageView, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
            mJazzy.setObjectForPosition(imageView, position);
            return imageView;
        }

        @Override
        public void destroyItem(ViewGroup container, int position, Object obj) {
            container.removeView(mJazzy.findViewFromObject(position));
        }

        @Override
        public int getCount() {
            return mImg.length;
        }

        @Override
        public boolean isViewFromObject(View view, Object obj) {
            if (view instanceof OutlineContainer) {
                return ((OutlineContainer) view).getChildAt(0) == obj;
            } else {
                return view == obj;
            }
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add("Toggle Fade");
        String[] effects = this.getResources().getStringArray(R.array.jazzy_effects);
        for (String effect : effects)
            menu.add(effect);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getTitle().toString().equals("Toggle Fade")) {
            mJazzy.setFadeEnabled(!mJazzy.getFadeEnabled());
        } else {
            TransitionEffect effect = TransitionEffect.valueOf(item.getTitle().toString());
            setupJazziness(effect);
        }
        return true;
    }

}

项目源码下载：http://files.cnblogs.com/hsx514/JazzyViewPager_Test.zip

其中一种的效果如下：