android - ListView OnScrollListener不会在ViewPager中调用

我有一个FragmentPagerAdapter创建它的子页面（即ListFragments），如下所示：

@Override
public Fragment getItem(int position) {
    return FragmentChildPage.newInstance();
}

我给viewpager的OffscreenPageLimit值为1。孩子有一个自定义的。
我遇到的问题是，自定义滚动侦听器只在viewpager扫过其ListFragments时创建的子ScrollListener上工作，即子页>2。
更令人困惑的是，如果我滚动几页，然后返回到第一页滚动侦听器现在工作。
这是怎么回事？似乎ListFragments干扰了一些子页面。
谢谢

最佳答案

试试这个。对我有用！

public class ActivityTest extends SherlockFragmentActivity {

    private ViewPager mViewPager;

    private TestAdapter mAdapter;

    @Override
    protected void onCreate(Bundle arg0) {
        super.onCreate(arg0);

        mViewPager = new ViewPager(this);
        mViewPager.setId(android.R.id.button1);
        setContentView(mViewPager);

        mAdapter = new TestAdapter(getSupportFragmentManager());
        mViewPager.setAdapter(mAdapter);
    }

    private class TestAdapter extends FragmentPagerAdapter {

        public TestAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            return TestListFragment.newInstance(position);
        }

        @Override
        public int getCount() {
            return 10;
        }

    }

    private static class TestListFragment extends SherlockListFragment {

        private static final String TAG = TestListFragment.class.getSimpleName();

        private String[] mItems = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9","0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };

        private int mPos;

        @SuppressLint("ValidFragment")
        public static TestListFragment newInstance(int pos) {
            TestListFragment frag = new TestListFragment();
            Bundle b = new Bundle();
            b.putInt("pos", pos);
            frag.setArguments(b);
            return frag;
        }

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            mPos = getArguments().getInt("pos");
        }

        @Override
        public void onViewCreated(View view, Bundle savedInstanceState) {
            super.onViewCreated(view, savedInstanceState);

            setListAdapter(new ArrayAdapter<String>(getSherlockActivity(), android.R.layout.simple_list_item_1, mItems));

            getListView().setOnScrollListener(new OnScrollListener() {
                @Override
                public void onScrollStateChanged(AbsListView view, int scrollState) {

                }

                @Override
                public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
                    Log.d(TAG, "onScroll() - Fragment: " + mPos);
                }
            });
        }
    }

}