困扰很久的问题 挺纠结的 help啊。
我自定义了一个Scroller继承了ViewGroup 这个控件实现的功能就像android桌面那种滚动效果，然后我在activity给我自定义的Scroller添加了元素，分成了几页，我想在我添加的某个元素上显示当前的页码，我不知道代码到底在哪里写，该怎么写？

//这是自定义的控件package org.bluemedia.constom;import org.bluemedia.R;import org.bluemedia.activities.Brand_search;import android.content.Context;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.Button;import android.widget.LinearLayout;import android.widget.Scroller;public class ScrollLayout extends ViewGroup {    private static final String TAG = "ScrollLayout";    private Scroller mScroller;    private VelocityTracker mVelocityTracker;    private int mCurScreen;    private int mDefaultScreen = 0;    private static final int TOUCH_STATE_REST = 0;    private static final int TOUCH_STATE_SCROLLING = 1;    private static final int SNAP_VELOCITY = 600;    private int mTouchState = TOUCH_STATE_REST;    private int mTouchSlop;    private float mLastMotionX;    private float mLastMotionY;    public ScrollLayout(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public ScrollLayout(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        mScroller = new Scroller(context);        mCurScreen = mDefaultScreen;        mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();    }    @Override    protected void onLayout(boolean changed, int l, int t, int r, int b) {        if (changed) {            int childLeft = 0;            final int childCount = getChildCount();            for (int i = 0; i < childCount; i++) {                View childView = getChildAt(i);                if (childView.getVisibility() != View.GONE) {                    final int childWidth = childView.getMeasuredWidth();                    childView.layout(childLeft, 0, childLeft + childWidth,                            childView.getMeasuredHeight());                    childLeft += childWidth;                } else {                    removeView(childView);                }            }        }    }    @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);        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        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);    }    /**     *      * According to the position of current layout     *      * scroll to the destination page.     */    public void snapToDestination() {        final int screenWidth = getWidth();        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(); // Redraw the layout        }    }    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() {        if (mScroller.computeScrollOffset()) {            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());            postInvalidate();        }    }    @Override    public boolean onTouchEvent(MotionEvent event) {        if (mVelocityTracker == null) {            mVelocityTracker = VelocityTracker.obtain();        }        mVelocityTracker.addMovement(event);        final int action = event.getAction();        final float x = event.getX();        final float y = event.getY();        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");            final VelocityTracker velocityTracker = mVelocityTracker;            velocityTracker.computeCurrentVelocity(1000);            int velocityX = (int) velocityTracker.getXVelocity();            Log.e(TAG, "velocityX:" + velocityX);            if (velocityX > SNAP_VELOCITY && mCurScreen > 0) {                Log.e(TAG, "snap left");                snapToScreen(mCurScreen - 1);                System.err.println("11");            } else if (velocityX < -SNAP_VELOCITY                    && mCurScreen < getChildCount() - 1) {                Log.e(TAG, "snap right");                snapToScreen(mCurScreen + 1);                System.err.println("2");            } else {                snapToDestination();            }            mTouchState = TOUCH_STATE_REST;            break;        case MotionEvent.ACTION_CANCEL:            mTouchState = TOUCH_STATE_REST;            break;        }        return true;    }    @Override    public boolean onInterceptTouchEvent(MotionEvent ev) {        Log.e(TAG, "onInterceptTouchEvent-slop:" + mTouchSlop + "; action = "                + ev.getAction());        final int action = ev.getAction();        if ((action == MotionEvent.ACTION_MOVE)                && (mTouchState != TOUCH_STATE_REST)) {            Log.e(TAG, "onInterceptTouchEvent-action:" + action);            return true;        }        final float x = ev.getX();        final float y = ev.getY();        switch (action) {        case MotionEvent.ACTION_MOVE:            final int xDiff = (int) Math.abs(mLastMotionX - x);            Log.e(TAG, "onInterceptTouchEvent-move: xDiff = " + xDiff                    + "; mLastMotionX = " + mLastMotionX);            if (xDiff > mTouchSlop) {                mTouchState = TOUCH_STATE_SCROLLING;            }            break;        case MotionEvent.ACTION_DOWN:            mLastMotionX = x;            mLastMotionY = y;            Log.e(TAG, "onInterceptTouchEvent-down: x = " + x + "; y = " + y);            mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST                    : TOUCH_STATE_SCROLLING;            break;        case MotionEvent.ACTION_CANCEL:        case MotionEvent.ACTION_UP:            Log.e(TAG, "onInterceptTouchEvent-up: mLastMotionX = "                    + mLastMotionX);            mTouchState = TOUCH_STATE_REST;            break;        }        return mTouchState != TOUCH_STATE_REST;    }}

//这是我的activityscrollLayout = (ScrollLayout)findViewById(R.id.ScrollLayoutTest);        ImageView img1=(ImageView)findViewById(R.id.img1);        ImageView img2=(ImageView)findViewById(R.id.img2);        ImageView img3=(ImageView)findViewById(R.id.img3);        img4=(Button)findViewById(R.id.img4);        ImageView img5=(ImageView)findViewById(R.id.img5);        ImageView img6=(ImageView)findViewById(R.id.img6);        ImageView img7=(ImageView)findViewById(R.id.img7);        DisplayMetrics dm = new DisplayMetrics();        // 取得窗口属性        getWindowManager().getDefaultDisplay().getMetrics(dm);        // 窗口的宽度        screenWidth = dm.widthPixels;        // 图片宽度        imgWidth = BitmapFactory.decodeResource(getResources(),                R.drawable.bg_pinpai_fenlei).getWidth();        // 获取中间的空隙        paddingWidth = (screenWidth/4-imgWidth)/2;                //得到总页数        if(count%pageSize!=0){            page=count/pageSize+1;        }else{            page=count/pageSize;        }        switch (page) {        case 2:            img3.setVisibility(1);            break;        case 3:            img2.setVisibility(1);            img3.setVisibility(1);            break;        case 4:            img5.setVisibility(0);            img2.setVisibility(1);            img3.setVisibility(1);            break;        case 5:            img6.setVisibility(1);            img5.setVisibility(1);            img2.setVisibility(1);            img3.setVisibility(1);            break;        case 6:            img7.setVisibility(1);            img6.setVisibility(1);            img5.setVisibility(1);            img2.setVisibility(1);            img3.setVisibility(1);            break;        case 1:            img4.setText("1");            break;        default:            img1.setVisibility(1);            img7.setVisibility(1);            img6.setVisibility(1);            img5.setVisibility(1);            img2.setVisibility(1);            img3.setVisibility(1);            break;        }        img4.setText("1");        int a=0;          //循环给控件添加元素        breakFor:for(int i=0;i<page;i++){            TableLayout table =new TableLayout(this);            for(int j=0;j<4;j++){//显示4行4列                TableRow row=new TableRow(this);                 for(int k=0;k<4;k++){                    a++;                    ImageView img=new ImageView(this);                    img.setPadding(paddingWidth, 20, paddingWidth, 20);                    img.setImageResource(R.drawable.bg_pinpai_fenlei);                    row.addView(img);                    if(count==a){                        table.addView(row);                        scrollLayout.addView(table);                        break breakFor;//跳到最外层                    }                }                 table.addView(row);            }            scrollLayout.addView(table);        }