SwipeRefreshLayout-垂直滚动不'；将android版本切换到v21时无法工作

当用户在寻呼机内滚动时，MyViewPager必须垂直滚动。 这是在android版本19中工作的，现在我已经将android版本更新到了v21，我得到的是一个刷新球。我可以使球隐形，但寻呼机仍然没有滚动

这是我的主要任务：content.xml

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.widget.SwipeRefreshLayout
    android:layout_below="@id/pull_text_layout"
    android:id="@+id/refresh"
    android:layout_width="match_parent"
    android:layout_height="205dp">
<com.pager.MyViewPager
           android:id="@+id/pager"
           android:layout_marginTop="5dp"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:background="@android:color/white">
       </com.pager.MyViewPager>
</android.support.v4.widget.SwipeRefreshLayout>

这是MyViewPager

public class MyViewPager extends ViewPager {

    private boolean paginationEnabled = true,
                        scrolling = false;
    private int scrolled;
    private ScrollListener listener;

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

    public MyViewPager(Context context, AttributeSet attr) {
        super(context, attr);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent e) {
        if (!paginationEnabled) {
            return false;
        } else {
            int action = e.getAction();
            if (scrolling && (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL)) {
                scrolling = false;
                if (listener != null) {
                    listener.onScrollFinished();
                }
                if(scrolling)
                {}

            }
            return super.onInterceptTouchEvent(e);
        }
    }

    public void setPaginationEnabled(boolean paginationEnabled) {
        this.paginationEnabled = paginationEnabled;
    }

    public void setListener(ScrollListener listener) {
        this.listener = listener;
    }

    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
        scrolling = true;
        if (listener != null) {
            listener.onScrollStarted();
        }
    }

    public interface ScrollListener {
        public void onScrollStarted();
        public void onScrollFinished();
    }

}

---

最后，我使用了一个自定义组件来使用垂直滚动。文件如下：

public class MyViewPager extends ViewPager {

    private boolean paginationEnabled = true,
                        scrolling = false;
    private int scrolled;
    private ScrollListener listener;

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

    public MyViewPager(Context context, AttributeSet attr) {
        super(context, attr);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent e) {
        if (!paginationEnabled) {
            return false;
        } else {
            int action = e.getAction();
            if (scrolling && (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL)) {
                scrolling = false;
                if (listener != null) {
                    listener.onScrollFinished();
                }
                if(scrolling)
                {}

            }
            return super.onInterceptTouchEvent(e);
        }
    }

    public void setPaginationEnabled(boolean paginationEnabled) {
        this.paginationEnabled = paginationEnabled;
    }

    public void setListener(ScrollListener listener) {
        this.listener = listener;
    }

    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
        scrolling = true;
        if (listener != null) {
            listener.onScrollStarted();
        }
    }

    public interface ScrollListener {
        public void onScrollStarted();
        public void onScrollFinished();
    }

}