main.xml

app_item.xml 

AllAppList.java   (主Activity)

package com.hhj.appListDemo;import java.util.List;import android.app.Activity;import android.content.ActivityNotFoundException;import android.content.Context;import android.content.Intent;import android.content.pm.PackageManager;import android.content.pm.ResolveInfo;import android.graphics.Color;import android.os.Bundle;import android.util.Log;import android.view.KeyEvent;import android.view.View;import android.view.Window;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.GridView;import android.widget.Toast;public class AllAppList extends Activity {    private static final String TAG = "ScrollLayoutTest";    private ScrollLayout mScrollLayout;    private static final float APP_PAGE_SIZE = 16.0f;    private Context mContext;    final private int[] color = { Color.BLUE, Color.GRAY, Color.CYAN,            Color.GREEN, Color.LTGRAY, Color.MAGENTA, Color.RED };    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        this.requestWindowFeature(Window.FEATURE_NO_TITLE);        mContext = this;        setContentView(R.layout.main);        mScrollLayout = (ScrollLayout) findViewById(R.id.ScrollLayoutTest);        initViews();    }    public void initViews() {        final PackageManager packageManager = getPackageManager();        final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);        // get all apps        final List
      
        apps = packageManager.queryIntentActivities(                mainIntent, 0);        System.out.println("apps---->" + apps.size());        // the total pages        final int PageCount = (int) Math.ceil(apps.size() / APP_PAGE_SIZE);        System.out.println("PageCount--->" + PageCount);        Log.e(TAG, "size:" + apps.size() + " page:" + PageCount);        for (int i = 0; i < PageCount; i++) {            GridView appPage = new GridView(this);            // get the "i" page data            appPage.setAdapter(new AppAdapter(this, apps, i));            appPage.setNumColumns(4);            appPage.setOnItemClickListener(listener);            // appPage.setBackgroundColor(color[i]);            mScrollLayout.addView(appPage);        }    }    public OnItemClickListener listener = new OnItemClickListener() {        public void onItemClick(AdapterView
        parent, View view, int position,                long id) {            // TODO Auto-generated method stub            ResolveInfo appInfo = (ResolveInfo) parent                    .getItemAtPosition(position);            Intent mainIntent = mContext                    .getPackageManager()                    .getLaunchIntentForPackage(appInfo.activityInfo.packageName);            mainIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);            try {                // launcher the package                mContext.startActivity(mainIntent);            } catch (ActivityNotFoundException noFound) {                Toast.makeText(mContext, "Package not found!",                        Toast.LENGTH_SHORT).show();            }        }    };    @Override    protected void onDestroy() {        // TODO Auto-generated method stub        android.os.Process.killProcess(android.os.Process.myPid());        super.onDestroy();    }    @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {        // TODO Auto-generated method stub        if (keyCode == KeyEvent.KEYCODE_BACK) {            finish();            return true;        }        return super.onKeyDown(keyCode, event);    }}
      

AppAdapter.java  (列表适配器)

package com.hhj.appListDemo;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.content.pm.PackageManager;import android.content.pm.ResolveInfo;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;public class AppAdapter extends BaseAdapter {    private List
      
        mList;    private Context mContext;    public static final int APP_PAGE_SIZE = 16;    private PackageManager pm;    public AppAdapter(Context context, List
       
         list, int page) {        mContext = context;        pm = context.getPackageManager();        mList = new ArrayList
        
         ();        int i = page * APP_PAGE_SIZE;        int iEnd = i + APP_PAGE_SIZE;        while ((i < list.size()) && (i < iEnd)) {            mList.add(list.get(i));            i++;        }    }    public int getCount() {        // TODO Auto-generated method stub        return mList.size();    }    public Object getItem(int position) {        // TODO Auto-generated method stub        return mList.get(position);    }    public long getItemId(int position) {        // TODO Auto-generated method stub        return position;    }    public View getView(int position, View convertView, ViewGroup parent) {        // TODO Auto-generated method stub        ResolveInfo appInfo = mList.get(position);        AppItem appItem;        if (convertView == null) {            // 初始化 与findViewById类型，只不过findViewById是对控件，而这是对这个布局            View v = LayoutInflater.from(mContext).inflate(R.layout.app_item,                    null);            appItem = new AppItem();            // 分别用来存储app的图标和名字            appItem.mAppIcon = (ImageView) v.findViewById(R.id.ivAppIcon);            appItem.mAppName = (TextView) v.findViewById(R.id.tvAppName);            v.setTag(appItem);            convertView = v;        } else {            appItem = (AppItem) convertView.getTag();        }        // set the icon        appItem.mAppIcon.setImageDrawable(appInfo.loadIcon(pm));        // set the app name        appItem.mAppName.setText(appInfo.loadLabel(pm));        return convertView;    }    public static class AppItem {        ImageView mAppIcon;        TextView mAppName;    }}
        
       
      

ScrollLayout.java  (自定义动画控件)

package com.hhj.appListDemo;import java.util.Random;import com.hhj.appListDemo.AppAdapter.AppItem;import android.content.Context;import android.content.pm.ResolveInfo;import android.graphics.Bitmap;import android.graphics.Camera;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.PaintFlagsDrawFilter;import android.graphics.drawable.BitmapDrawable;import android.util.AttributeSet;import android.util.Log;import android.view.MotionEvent;import android.view.VelocityTracker;import android.view.View;import android.view.ViewConfiguration;import android.view.ViewGroup;import android.view.animation.Transformation;import android.widget.GridView;import android.widget.ImageView;import android.widget.ListAdapter;import android.widget.Scroller;public class ScrollLayout extends ViewGroup {    private boolean type;        /** 沿Y轴正方向看，数值减1时动画逆时针旋转。 */    public static final boolean ROTATE_DECREASE = true;    /** 沿Y轴正方向看，数值减1时动画顺时针旋转。 */    public static final boolean ROTATE_INCREASE = false;        /** 值为true时可明确查看动画的旋转方向。 */    public static final boolean DEBUG = false;        private static final String TAG = "ScrollLayout";    // 用于滑动的类    private Scroller mScroller;    // 用来跟踪触摸速度的类    private VelocityTracker mVelocityTracker;    // 当前的屏幕视图    private int mCurScreen;    // 默认的显示视图    private int mDefaultScreen = 0;    // 无事件的状态    private static final int TOUCH_STATE_REST = 0;    // 处于拖动的状态    private static final int TOUCH_STATE_SCROLLING = 1;    // 滑动的速度    private static final int SNAP_VELOCITY = 600;    private static int mNum;        private int mTouchState = TOUCH_STATE_REST;    private int mTouchSlop;    private float mLastMotionX;    // 用来处理立体效果的类    private Camera mCamera;    private Matrix mMatrix;    /**旋转的角度*/    private float angle = 180;    public ScrollLayout(Context context, AttributeSet attrs) {        this(context, attrs, 0);        // TODO Auto-generated constructor stub    }    // 在构造器中初始化    public ScrollLayout(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        // TODO Auto-generated constructor stub        mScroller = new Scroller(context);        mCurScreen = mDefaultScreen;        mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();        mCamera = new Camera();        mMatrix = new Matrix();    }    /*     *      * 为子View指定位置     */    protected void onLayout(boolean changed, int left, int top, int right,            int bottom) {        // TODO Auto-generated method stub        Log.e(TAG, "onLayout");        if (changed) {            int childLeft = 0;            final int childCount = getChildCount();            for (int i = 0; i < childCount; i++) {                final View childView = getChildAt(i);                if (childView.getVisibility() != View.GONE) {                    final int childWidth = childView.getMeasuredWidth();                    childView.layout(childLeft, 0, childLeft + childWidth,                            childView.getMeasuredHeight());                    childLeft += childWidth;                }            }        }    }    // 重写此方法用来计算高度和宽度    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        Log.e(TAG, "onMeasure");        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        final int width = MeasureSpec.getSize(widthMeasureSpec);        final int widthMode = MeasureSpec.getMode(widthMeasureSpec);        // Exactly：width代表的是精确的尺寸        // AT_MOST：width代表的是最大可获得的空间        if (widthMode != MeasureSpec.EXACTLY) {            throw new IllegalStateException(                    "ScrollLayout only canmCurScreen run at EXACTLY mode!");        }        final int heightMode = MeasureSpec.getMode(heightMeasureSpec);        if (heightMode != MeasureSpec.EXACTLY) {            throw new IllegalStateException(                    "ScrollLayout only can run at EXACTLY mode!");        }        // The children are given the same width and height as the scrollLayout        // 得到多少页(子View)并设置他们的宽和高        final int count = getChildCount();        for (int i = 0; i < count; i++) {            getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec);        }        // Log.e(TAG, "moving to screen "+mCurScreen);        scrollTo(mCurScreen * width, 0);    }                /**     * 当进行View滑动时，会导致当前的View无效，该函数的作用是对View进行重新绘制 调用drawScreen函数     */    protected void dispatchDraw(Canvas canvas) {        // TODO Auto-generated method stub        final long drawingTime = getDrawingTime();        final int count = getChildCount();        //Log.i("HHJ", "125"+"   drawingTime:"+drawingTime+"           count:"+count);        for (int i = 0; i < count; i++) {            drawScreenCube(canvas, i, drawingTime,mNum);//mNum        }    }        class BigStone {        //图片        Bitmap bitmap;        //角度        int angle;        //x坐标        float x;        //y坐标        float y;        //是否可见        String text;        boolean isVisible = true;    }        /**     * 计算每个点的坐标     */    private void computeCoordinates() {        BigStone stone;        for(int index=0; index
      
        scrollX + width || scrollWidth + width < scrollX) {                 return;             }             final View child;// = getChildAt(screen);                         float scaleX = 1f;/*设置矩阵大小*/            float scaleY = 1f;                        float centerX= (scrollWidth < scrollX)?scrollWidth + width:scrollWidth; //中心位置            float centerY=getHeight()/2;                        if(screen==mCurScreen+1 && getChildAt(mCurScreen+1)!=null){                child = getChildAt(mCurScreen+1);                Log.i("HHJ", "child:"+child.toString());                scaleX = (float) (((getScrollX()-(mCurScreen*getMeasuredWidth()))) * (1.0 / getMeasuredWidth()));                scaleY = scaleX;                centerX = (scrollWidth < scrollX)?scrollWidth + width:scrollWidth-getMeasuredWidth()/2;                 centerY = getHeight()/2;             }else if(screen==mCurScreen-1 && getChildAt(mCurScreen-1)!=null){                child = getChildAt(mCurScreen-1);            }else {                child = getChildAt(mCurScreen);                if(scrollX
       
        < scrollX)?scrollWidth + width:scrollWidth-getMeasuredWidth()/2;                     centerY = getHeight()/2;                 }            }                        final Camera camera = mCamera;             final Matrix matrix = mMatrix;             canvas.save();             camera.save();             camera.rotateY(-0);                        camera.getMatrix(matrix);             camera.restore();                         matrix.preScale(Math.abs(scaleX),Math.abs(scaleY));//大小            //matrix.postScale(scaleX, scaleY);                        matrix.preTranslate(-centerX, -centerY); //中心位置            matrix.postTranslate(centerX, centerY);                         canvas.concat(matrix);            drawChild(canvas, child, drawingTime);             canvas.restore();         }else if(select==3){
    //波浪情况            final int width = getWidth();             final int scrollWidth = screen * width;             final int scrollX = this.getScrollX();              if(scrollWidth > scrollX + width || scrollWidth + width < scrollX) {                 return;             }             final View child;// = getChildAt(screen);             float scaleX = 1f;            float scaleY = 1f;            if(screen==mCurScreen+1 && getChildAt(mCurScreen+1)!=null){                child = getChildAt(mCurScreen+1);                scaleX = (float) ((float) ((getScrollX()-(mCurScreen*getMeasuredWidth()))) * (1.0 / getMeasuredWidth()));                scaleY = scaleX;            }else if(screen==mCurScreen-1 && getChildAt(mCurScreen-1)!=null){                child = getChildAt(mCurScreen-1);                scaleX = (float) ((float) ((getScrollX()-(mCurScreen*getMeasuredWidth()))) * (1.0 / getMeasuredWidth()));                scaleY = scaleX;            }else {                child = getChildAt(mCurScreen);            }                        final float centerX = (scrollWidth < scrollX)?scrollWidth + width:scrollWidth;             final float centerY = getHeight()/2;                                     final Camera camera = mCamera;             final Matrix matrix = mMatrix;             canvas.save();             camera.save();             camera.rotateY(-0);                        camera.getMatrix(matrix);             camera.restore();                         matrix.preScale(Math.abs(scaleX), Math.abs(scaleY));            //matrix.postScale(scaleX, scaleY);                        matrix.preTranslate(-centerX, -centerY);             matrix.postTranslate(centerX, centerY);                         canvas.concat(matrix);             drawChild(canvas, child, drawingTime);             canvas.restore();         }else if(select==4){
    //立体翻转            final int width = getWidth();             final int scrollWidth = screen * width;             final int scrollX = this.getScrollX();              if(scrollWidth > scrollX + width || scrollWidth + width < scrollX) {                 return;             }             final View child = getChildAt(screen);             final int faceIndex = screen;             final float faceDegree = (this.getScrollX() - faceIndex *480f)*0.1875f;            final float currentDegree = getScrollX() * (angle / getMeasuredWidth());            if(faceDegree > 90 || faceDegree < -90) {                 return;             }                     final float centerX = (scrollWidth < scrollX)?scrollWidth + width:scrollWidth;             final float centerY = getHeight()/2;             final Camera camera = mCamera;             final Matrix matrix = mMatrix;             canvas.save();             camera.save();             camera.rotateY(-faceDegree);             camera.getMatrix(matrix);             camera.restore();             matrix.preTranslate(-centerX, -centerY);             matrix.postTranslate(centerX, centerY);             canvas.concat(matrix);             drawChild(canvas, child, drawingTime);             canvas.restore();         }else if (select==5){            // 得到当前子View的宽度            final int width = getWidth();                        /**当前滑动到view视图在viewgroup里面到位置   scrollWidth = 屏数*该view到宽度  */            final int scrollWidth = screen * width;            /**View水平方向的偏移量（像素）*/            final int scrollX = this.getScrollX();            if (scrollWidth > scrollX + width || scrollWidth + width < scrollX) {                return;            }            final View child = getChildAt(screen);            final int faceIndex = screen;                        /**             * 1.解锁下这里到意思  由于当前一屏所充满屏幕宽度（假如所480*800）480               * 2. 180/getMeasuredWidth() 当前屏总共分为180度  比上 当前屏总宽度 意思说屏每一个像素到滑动占多少角度    意思所说180/480=0.375 每移动一个像素就所要转动0.375个角度            * 3. getScrollX() 由于这个所一个viewgroup 上滑动到偏移量 ,所有等有所将viewgroup翻转了很多个180             *    等于说所第一屏所0～180度   第二屏所 180 ～ 360 度   第三屏所 360～540度 依次将viewgroup翻转到角度而已             *  */            final float currentDegree = getScrollX() * (angle / getMeasuredWidth());            /**             * 1.当前翻转到角度   currentDegree-当前屏数*180             * 2.这里这样一减当前到滑屏度数就控制在-180～0度之间了             * 3.让后在加上下面一个if判断，是将当前一屏与屏成九十度到时候以后的滑动就注销掉老             *              **/            final float faceDegree = currentDegree - faceIndex * angle;            if (faceDegree > 90 || faceDegree < -90) {                return;            }                        //旋转的x轴中心位置            final float centerX = (scrollWidth < scrollX) ? scrollWidth + width: scrollWidth;            Log.i("HHJ", "centerX:"+centerX+"    scrollWidth:"+scrollWidth+"   scrollX:"+scrollX);            //旋转的y轴中心位置            final float centerY = getHeight() / 2;            final Camera camera = mCamera;            final Matrix matrixX = mMatrix;            canvas.save();            camera.save();            camera.rotateY(-faceDegree);            camera.getMatrix(matrixX);            camera.restore();            matrixX.preTranslate(-centerX, -centerY);//特效处理的中心            matrixX.postTranslate(centerX, centerY);            canvas.concat(matrixX);            drawChild(canvas, child, drawingTime);            canvas.restore();        }else {            super.dispatchDraw(canvas);        }    }        /**     * 把中心点放到中心处     * @param canvas     * @param bitmap     * @param left     * @param top     */    void drawInCenter(Canvas canvas, Bitmap bitmap, float left, float top,String text) {        canvas.drawPoint(left, top, mPaint);        Log.i("HHJ","bitmap==null:"+(bitmap==null));        canvas.drawBitmap(bitmap, left-bitmap.getWidth()/2, top-bitmap.getHeight()/2, null);        canvas.drawText(text,left-bitmap.getWidth()/2+2, top+bitmap.getHeight()/2+8, mPaint);        canvas.restore();     }    /**     * 根据目前的位置滚动到下一个视图位置.     */    public void snapToDestination() {        final int screenWidth = getWidth();        // 根据View的宽度以及滑动的值来判断是哪个View        final int destScreen = (getScrollX() + screenWidth / 2) / screenWidth;        snapToScreen(destScreen);    }    public void snapToScreen(int whichScreen) {        // get the valid layout page        whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1));        if (getScrollX() != (whichScreen * getWidth())) {            final int delta = whichScreen * getWidth() - getScrollX();            mScroller.startScroll(getScrollX(), 0, delta, 0,                    Math.abs(delta) * 2);            mCurScreen = whichScreen;            invalidate(); // 重新布局        }    }    public void setToScreen(int whichScreen) {        whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1));        mCurScreen = whichScreen;        scrollTo(whichScreen * getWidth(), 0);    }    public int getCurScreen() {        return mCurScreen;    }    @Override    public void computeScroll() {        // TODO Auto-generated method stub        if (mScroller.computeScrollOffset()) {            //Log.i("HHJ", "209"+mScroller.computeScrollOffset());            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());            postInvalidate();        }    }            public boolean onTouchEvent(MotionEvent event) {        // TODO Auto-generated method stub        if (mVelocityTracker == null) {            // 使用obtain方法得到VelocityTracker的一个对象            mVelocityTracker = VelocityTracker.obtain();        }        // 将当前的触摸事件传递给VelocityTracker对象        mVelocityTracker.addMovement(event);        // 得到触摸事件的类型        final int action = event.getAction();        final float x = event.getX();        switch (action) {        case MotionEvent.ACTION_DOWN:            Log.e(TAG, "event down!");            if (!mScroller.isFinished()) {                mScroller.abortAnimation();            }            mLastMotionX = x;            break;        case MotionEvent.ACTION_MOVE:            int deltaX = (int) (mLastMotionX - x);            mLastMotionX = x;            scrollBy(deltaX, 0);            break;        case MotionEvent.ACTION_UP:            Log.e(TAG, "event : up");            // if (mTouchState == TOUCH_STATE_SCROLLING) {
                 final VelocityTracker velocityTracker = mVelocityTracker;            // 计算当前的速度            velocityTracker.computeCurrentVelocity(1000);            // 获得当前的速度            int velocityX = (int) velocityTracker.getXVelocity();            if (velocityX > SNAP_VELOCITY && mCurScreen > 0) {                // Fling enough to move left                snapToScreen(mCurScreen - 1);            } else if (velocityX < -SNAP_VELOCITY && mCurScreen < getChildCount() - 1) {                // Fling enough to move right                snapToScreen(mCurScreen + 1);            } else {                snapToDestination();            }            if (mVelocityTracker != null) {                mVelocityTracker.recycle();                mVelocityTracker = null;            }            // }            mTouchState = TOUCH_STATE_REST;            break;        case MotionEvent.ACTION_CANCEL:            mTouchState = TOUCH_STATE_REST;            break;        }        return true;    }    @Override    public boolean onInterceptTouchEvent(MotionEvent ev) {        // TODO Auto-generated method stub        Log.e(TAG, "onInterceptTouchEvent-slop:" + mTouchSlop);        final int action = ev.getAction();        if ((action == MotionEvent.ACTION_MOVE)                && (mTouchState != TOUCH_STATE_REST)) {            return true;        }        final float x = ev.getX();        switch (action) {        case MotionEvent.ACTION_MOVE:            final int xDiff = (int) Math.abs(mLastMotionX - x);            if (xDiff > mTouchSlop) {                mTouchState = TOUCH_STATE_SCROLLING;            }            break;        case MotionEvent.ACTION_DOWN:                        mNum = new Random().nextInt(10);            mLastMotionX = x;            mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST                    : TOUCH_STATE_SCROLLING;            break;        case MotionEvent.ACTION_CANCEL:        case MotionEvent.ACTION_UP:            mTouchState = TOUCH_STATE_REST;            break;        }        return mTouchState != TOUCH_STATE_REST;    }}
       
      

 

 DEMO完整路径下载：

 

 【滑动的时候九宫格图标变成原形】

 

package com.hhj.allApp;import java.util.Random;import com.hhj.allApp.AppAdapter.AppItem;import android.content.Context;import android.graphics.Bitmap;import android.graphics.Camera;import android.graphics.Canvas;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.drawable.BitmapDrawable;import android.util.AttributeSet;import android.util.Log;import android.view.MotionEvent;import android.view.VelocityTracker;import android.view.View;import android.view.ViewConfiguration;import android.view.ViewGroup;import android.widget.GridView;import android.widget.Scroller;public class ScrollLayout extends ViewGroup {    private static final String TAG = "HHJ";    // 用于滑动的类    private Scroller mScroller;    // 用来跟踪触摸速度的类    private VelocityTracker mVelocityTracker;    // 当前的屏幕视图    private int mCurScreen;    // 默认的显示视图    private int mDefaultScreen = 0;    // 无事件的状态    private static final int TOUCH_STATE_REST = 0;    // 处于拖动的状态    private static final int TOUCH_STATE_SCROLLING = 1;    // 滑动的速度    private static final int SNAP_VELOCITY = 600;    private int mTouchState = TOUCH_STATE_REST;    private int mTouchSlop;    private float mLastMotionX;    // 用来处理立体效果的类    private Camera mCamera;    private Matrix mMatrix;    // 旋转的角度    private float angle = 100;        private int mNum;        Paint mPaint = new Paint();        private Context mContext;    public ScrollLayout(Context context, AttributeSet attrs) {        this(context, attrs, 0);        mContext = context;        // TODO Auto-generated constructor stub    }    // 在构造器中初始化    public ScrollLayout(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        // TODO Auto-generated constructor stub        mScroller = new Scroller(context);        mCurScreen = mDefaultScreen;        mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();        mCamera = new Camera();        mMatrix = new Matrix();    }    /*     *      * 为子View指定位置     */    protected void onLayout(boolean changed, int left, int top, int right,            int bottom) {        // TODO Auto-generated method stub        Log.e(TAG, "onLayout");        if (changed) {            int childLeft = 0;            final int childCount = getChildCount();            for (int i = 0; i < childCount; i++) {                final View childView = getChildAt(i);                if (childView.getVisibility() != View.GONE) {                    final int childWidth = childView.getMeasuredWidth();                    childView.layout(childLeft, 0, childLeft + childWidth,                            childView.getMeasuredHeight());                    childLeft += childWidth;                }            }        }    }    // 重写此方法用来计算高度和宽度    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        Log.e(TAG, "onMeasure");        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        final int width = MeasureSpec.getSize(widthMeasureSpec);        final int widthMode = MeasureSpec.getMode(widthMeasureSpec);        // Exactly：width代表的是精确的尺寸        // AT_MOST：width代表的是最大可获得的空间        if (widthMode != MeasureSpec.EXACTLY) {            throw new IllegalStateException(                    "ScrollLayout only canmCurScreen run at EXACTLY mode!");        }        final int heightMode = MeasureSpec.getMode(heightMeasureSpec);        if (heightMode != MeasureSpec.EXACTLY) {            throw new IllegalStateException(                    "ScrollLayout only can run at EXACTLY mode!");        }        // The children are given the same width and height as the scrollLayout        // 得到多少页(子View)并设置他们的宽和高        final int count = getChildCount();        for (int i = 0; i < count; i++) {            getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec);        }        // Log.e(TAG, "moving to screen "+mCurScreen);        scrollTo(mCurScreen * width, 0);    }    /*     * 当进行View滑动时，会导致当前的View无效，该函数的作用是对View进行重新绘制 调用drawScreen函数     */    protected void dispatchDraw(Canvas canvas) {        //Log.i(TAG, "dispatchDraw");        final long drawingTime = getDrawingTime();        final int count = getChildCount();        for (int i = 0; i < count; i++) {            drawScreen(canvas, i, drawingTime,1);//mNum        }    }    BigStone[] mStones;    /**圆心坐标*/    int mPointX=0, mPointY=0;   /**定义一个圆的半径*/    int mRadius = 180;        /**定义一个陀螺的半径*/    int[] mmRadius = {30,40,50,60,70,80,90,100,110,120,130,140,150,160,170,180};    /**每两个点间隔的角度*/    int mDegreeDelta;    /**是否在拖动*/    boolean isDrag=false;    public void drawScreen(Canvas canvas, int screen, long drawingTime,int selsect) {        if(selsect == 1){ //圆            Log.i(TAG, "isDrag:"+isDrag+"    "+getScrollX());            if(isDrag){                GridView gridView = (GridView) getChildAt(screen);                int width = getWidth();                int height = getHeight();                int screenCount = gridView.getChildCount();                mStones = new BigStone[screenCount];;                                mPointX = screen*width+width/2;                mPointY =height/2;                                BigStone stone;                int angle = 0;                mDegreeDelta = 180/screenCount;                                for(int index=0; index
      
        scrollX + width || scrollWidth + width < scrollX) {                return;            }            final View child = getChildAt(screen);            final int faceIndex = screen;            final float currentDegree = getScrollX() * (angle / getMeasuredWidth());            final float faceDegree = currentDegree - faceIndex * angle;            if (faceDegree > 90 || faceDegree < -90) {                return;            }            final float centerX = (scrollWidth < scrollX) ? scrollWidth + width                    : scrollWidth;            final float centerY = getHeight() / 2;            final Camera camera = mCamera;            final Matrix matrix = mMatrix;            canvas.save();            camera.save();            camera.rotateY(-faceDegree);            camera.getMatrix(matrix);            camera.restore();            matrix.preTranslate(-centerX, -centerY);            matrix.postTranslate(centerX, centerY);            canvas.concat(matrix);            drawChild(canvas, child, drawingTime);            canvas.restore();        }    }        /**     * 根据目前的位置滚动到下一个视图位置.     */    public void snapToDestination() {        final int screenWidth = getWidth();        // 根据View的宽度以及滑动的值来判断是哪个View        final int destScreen = (getScrollX() + screenWidth / 2) / screenWidth;        snapToScreen(destScreen);    }    public void snapToScreen(int whichScreen) {        // get the valid layout page        whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1));        if (getScrollX() != (whichScreen * getWidth())) {            final int delta = whichScreen * getWidth() - getScrollX();            mScroller.startScroll(getScrollX(), 0, delta, 0,                    Math.abs(delta) * 2);            mCurScreen = whichScreen;            invalidate(); // 重新布局        }    }    public void setToScreen(int whichScreen) {        whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1));        mCurScreen = whichScreen;        scrollTo(whichScreen * getWidth(), 0);    }    public int getCurScreen() {        return mCurScreen;    }    @Override    public void computeScroll() {        // TODO Auto-generated method stub        if (mScroller.computeScrollOffset()) {            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());            postInvalidate();        }    }    public boolean onTouchEvent(MotionEvent event) {        // TODO Auto-generated method stub        //Log.i(TAG, "onTouchEvent");                if (mVelocityTracker == null) {            // 使用obtain方法得到VelocityTracker的一个对象            mVelocityTracker = VelocityTracker.obtain();        }        // 将当前的触摸事件传递给VelocityTracker对象        mVelocityTracker.addMovement(event);        // 得到触摸事件的类型        final int action = event.getAction();        final float x = event.getX();        switch (action) {        case MotionEvent.ACTION_DOWN:                        if (!mScroller.isFinished()) {                mScroller.abortAnimation();            }            mLastMotionX = x;            break;        case MotionEvent.ACTION_MOVE:            isDrag = true;            int deltaX = (int) (mLastMotionX - x);            mLastMotionX = x;            scrollBy(deltaX, 0);            break;        case MotionEvent.ACTION_UP:            isDrag = false;            //Log.e(TAG, "event : up");            // if (mTouchState == TOUCH_STATE_SCROLLING) {
                 final VelocityTracker velocityTracker = mVelocityTracker;            // 计算当前的速度            velocityTracker.computeCurrentVelocity(1000);            // 获得当前的速度            int velocityX = (int) velocityTracker.getXVelocity();            if (velocityX > SNAP_VELOCITY && mCurScreen > 0) {                // Fling enough to move left                snapToScreen(mCurScreen - 1);            } else if (velocityX < -SNAP_VELOCITY                    && mCurScreen < getChildCount() - 1) {                // Fling enough to move right                snapToScreen(mCurScreen + 1);            } else {                snapToDestination();            }            if (mVelocityTracker != null) {                mVelocityTracker.recycle();                mVelocityTracker = null;            }            // }            mTouchState = TOUCH_STATE_REST;            break;        case MotionEvent.ACTION_CANCEL:            mTouchState = TOUCH_STATE_REST;            break;        }        return true;    }    @Override    public boolean onInterceptTouchEvent(MotionEvent ev) {        // TODO Auto-generated method stub        //Log.i(TAG, "onInterceptTouchEvent-slop:");        final int action = ev.getAction();        if ((action == MotionEvent.ACTION_MOVE)                && (mTouchState != TOUCH_STATE_REST)) {            return true;        }        final float x = ev.getX();        switch (action) {        case MotionEvent.ACTION_MOVE:            final int xDiff = (int) Math.abs(mLastMotionX - x);            if (xDiff > mTouchSlop) {                mTouchState = TOUCH_STATE_SCROLLING;            }            break;        case MotionEvent.ACTION_DOWN:            mNum = new Random().nextInt(5);            mLastMotionX = x;            mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST                    : TOUCH_STATE_SCROLLING;            break;        case MotionEvent.ACTION_CANCEL:        case MotionEvent.ACTION_UP:            mTouchState = TOUCH_STATE_REST;            break;        }        return mTouchState != TOUCH_STATE_REST;    }    class BigStone {        //图片        Bitmap bitmap;        //角度        int angle;        //x坐标        float x;        //y坐标        float y;        //是否可见        String text;        boolean isVisible = true;    }}