如何在android ScrollView xml中为每个滚动滚动滚动一定数量的值

我尝试建立scrollView，用户每次轻弹它时，它都可以滚动一定距离。或者换句话说，它可以每次滚动几个块。它类似于安卓手机2.3的菜单

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有什么想法吗？如果你能给我看一下示例代码。非常感谢您的帮助

从eclip的高级版面中选择滚动视图

<ScrollView
        android:id="@+id/scrol`<ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" >

        <LinearLayout
            android:id="@+id/linearLayout1"
            android:layout_width="match_parent"
            android:layout_height="match_parent" >
        </LinearLayout>
    </ScrollView>`lView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" >

        <LinearLayout
            android:id="@+id/linearLayout1"
            android:layout_width="match_parent"
            android:layout_height="match_parent" >
        </LinearLayout>
</ScrollView>

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用于扩展简单手势监听器。我的代码大致粘贴在这里。这只是为了对此有所了解。我在创建水平滚动视图时已经这样做了

setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {

        if (mGestureDetector.onTouchEvent(event)) {
            return true;
        } else if (event.getAction() == MotionEvent.ACTION_UP || event.getAction() == MotionEvent.ACTION_CANCEL) {
            int scrollX = getScrollX();
            int featureWidth = v.getMeasuredWidth();
            mActiveFeature = ((scrollX + (featureWidth/2))/featureWidth);
            int scrollTo = mActiveFeature*featureWidth;
            smoothScrollTo(scrollTo, 0);
            return true;
        } else {
              return false;
        }
    }
}

简单手势听者：

class MyGestureDetector extends SimpleOnGestureListener {
    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        try {
            if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                int featureWidth = getMeasuredWidth();
                mActiveFeature = (mActiveFeature < (mItems.size() - 1))? mActiveFeature + 1:mItems.size() -1;
                smoothScrollTo(mActiveFeature*featureWidth, 0);
                return true;
            } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                int featureWidth = getMeasuredWidth();
                mActiveFeature = (mActiveFeature > 0)? mActiveFeature - 1:0;
                smoothScrollTo(mActiveFeature*featureWidth, 0);
                return true;
            }
        } catch (Exception e) {
            Log.e("Fling", "There was an error processing the Fling event:" + e.getMessage());
        }

        return false;
    }
}

类MyGestureDetector扩展了SimpleGestureListener{
@凌驾
公共布尔onFling（MotionEvent e1、MotionEvent e2、float-velocityX、float-velocityY）{
试一试{
if（e1.getX（）-e2.getX（）>滑动最小距离和&Math.abs（速度x）>滑动阈值速度）{
int featureWidth=getMeasuredWidth（）；
mActiveFeature=（mActiveFeature<（mItems.size（）-1））？mActiveFeature+1:mItems.size（）-1；
smoothScrollTo（mActiveFeature*featureWidth，0）；
返回true；
}else if（e2.getX（）-e1.getX（）>swip\u MIN\u DISTANCE&&Math.abs（velocityX）>swip\u THRESHOLD\u VELOCITY）{
int featureWidth=getMeasuredWidth（）；
mActiveFeature=（mActiveFeature>0）？mActiveFeature-1:0；
smoothScrollTo（mActiveFeature*featureWidth，0）；
返回true；
}
}捕获（例外e）{
Log.e（“Fling”，“处理Fling事件时出错：”+e.getMessage（））；
}
返回false；
}
}