Android ScrollView的各种适配

背景
这里是为了解决在ScrollView包裹下，出现的各种奇葩问题。

1.在ScrollView包裹下ListView无法伸展开的问题

public class AdaptSvListView extends DigitalListView {

    public AdaptSvListView(Context context) {
        super(context);
    }

    public AdaptSvListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

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

    /**
     * 重写该方法，达到使ListView适应ScrollView的效果
     */
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }

}

2.防止包裹的ListView或GridView设置高度后，ScrollView的初始位置不在0

public class NotZeroScrollView extends ScrollView {

    public NotZeroScrollView(Context context) {
        super(context);
    }

    public NotZeroScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public NotZeroScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public void scrollTo(int x, int y) {
        //super.scrollTo(x, y);
    }
}

3.可设置可滑动不可滑动的ViewPager

public class ScrollAbleViewPager extends ViewPager {

    private boolean scrollAble = true;

    public ScrollAbleViewPager(Context context) {
        super(context);
    }
    public ScrollAbleViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    /**
     * 设置是否可滑动
     * @param scrollAble  false不可滑动，true可滑动
     */
    public void setScrollEnabled(boolean scrollAble) {
        this.scrollAble = scrollAble;
    }

    @Override
    public boolean onTouchEvent(MotionEvent arg0) {
        if (!scrollAble)
            return false;
        else
            return super.onTouchEvent(arg0);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent arg0) {
        if (!scrollAble)
            return false;
        else
            return super.onInterceptTouchEvent(arg0);
    }
}

4.在ScrollView包裹弹出PopupWindows导致ScrollView滚动的问题

public class NotZeroScrollView extends ScrollView {

    public NotZeroScrollView(Context context) {
        super(context);
    }

    public NotZeroScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public NotZeroScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public void scrollTo(int x, int y) {
        //super.scrollTo(x, y);
    }
}