我在我的应用中查看了寻呼机。在viewpager中有两个片段[1]和[2]都有[A]和[B]中的列表视图。当我滚动listview [A]并切换片段[2]时，我希望listview [B]自动滚动相同的数量。请帮忙
这是我的代码段
public class CurrencyViewPager extends BaseFragment {
private ListView mcurrencyListview;
private GeoCurrencyService mCurrency = GeoCurrencyService.getInstance();
ButtonPressListener buttonListener;
private CurrencyAdapter mCurrencyAdapter;
private String bankName;
private boolean checkFlag;
private ProgressBar mCurrencyProgress;
private TextView mCurrencyLoading;
private List<Currency> mList;
private String recCode;
private static int Firstposition;
private final CurrencyScrollListener listener;
private final int mListViewIndex;
// constructor
public CurrencyViewPager(List<Currency> myList, String name, boolean flag,String code, CurrencyScrollListener listener, int listViewIndex) {
super();
this.mList = myList;
this.bankName = name;
this.checkFlag = flag;
this.recCode = code;
this.listener = listener;
this.mListViewIndex = listViewIndex;
}
// interface
public interface ButtonPressListener {
public void onListItemPressed(Currency object, String name,String code);
}
// attach on listener
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
buttonListener = (ButtonPressListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement onButtonPressed");
}
}
// creating the main View.
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
Log.i("TAG","onCreateView");
View view = inflater.inflate(R.layout.listbuy, container, false);
mcurrencyListview = (ListView) view.findViewById(R.id.BuyList);
mCurrencyAdapter = new CurrencyAdapter(getActivity(),
R.layout.currency_row, mList, checkFlag, getLanguage());
mcurrencyListview.setAdapter(mCurrencyAdapter);
mcurrencyListview.setSelection(Firstposition);
// calling method getCurrency which take bank code as a parameter
/*getCurrency(code,null);*/
// reference to the list view of the corresponding layout
mcurrencyListview.setOnItemClickListener(new OnItemClickListener() {
// onClick on the List item
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long arg3) {
// getting Currency object according to the position
Currency currencyObject = mCurrencyAdapter.getItem(position);
// sending the object to the mainActivity
buttonListener.onListItemPressed(currencyObject, bankName,recCode);
}
});
return view;
}
// method getCurrency which takes bank code as a parameter and
// sets the adapter to the list on onPostExecute.
}
和viewpager的片段适配器
public class ViewPagerAdapter extends FragmentStatePagerAdapter implements
CurrencyScrollListener {
private String nBankName;
private List<Currency> list;
private String mycode;
private CurrencyViewPager[] mFragments = new CurrencyViewPager[2];
private int mCurrentScrollPosition;
@Override
public int getItemPosition(Object object) {
// TODO Auto-generated method stub
return super.getItemPosition(object);
}
public CurrencyViewPager getFCurrencyFragment(int index) {
CurrencyViewPager pager = mFragments[index];
if (pager == null) {
if (index == 0) {
pager = new CurrencyViewPager(list, nBankName, true, mycode,
this, 0);
} else {
pager = new CurrencyViewPager(list, nBankName, false, mycode,
this, 1);
}
mFragments[index] = pager;
}
return pager;
}
public ViewPagerAdapter(FragmentManager fm, List<Currency> currencyList,
String name, String code) {
super(fm);
this.list = currencyList;
this.nBankName = name;
this.mycode = code;
}
@Override
public Fragment getItem(int item) {
Log.i("TAG","getItem");
return getFCurrencyFragment(item);
}
@Override
public int getCount() {
return 2;
}
}