我正在尝试使用 PagerSlidingTabStrip 而不是 TabView 来实现 viewpager。 viewpager 具有三个选项卡，其中每个 ListView 显示事件列表。这三个选项卡分别称为“过去”、“今晚”和“ future ”。
我已将 slider 设置为 github页面建议:
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
View v = inflater.inflate(R.layout.all_events_main_strip, container, false);
// Set up the ViewPager, attaching the adapter and setting up a listener for when the
// user swipes between sections.
pager = (ViewPager) v .findViewById(R.id.pager_main);
tabs = (PagerSlidingTabStrip) v.findViewById(R.id.tabs);
adapter = new MyPagerAdapter(getFragmentManager());
pager.setAdapter(adapter);
tabs.setViewPager(pager);
// Set Present tab as default
pager.setCurrentItem(1);
return v;
}
当应用程序启动时，主事件第一次添加这个片段，一切都很好。 3 个可滑动选项卡和 3 个 ListView 。 (参见代码部分)
问题是这样的:
我注意到，当我按下后退按钮并再次替换片段时，为了重新打开 View 页面，中间的选项卡不会显示任何 ListView 。如果我向左或向右滑动，则会加载并显示其他选项卡中的内容，但“当前选项卡”仍为空。 当我调试 ToNightEvents ListFragment 时根本没有被调用。 你们有什么建议来解决这个问题吗？
代码:
代码结构如下:在onCreateView之后，我添加了一个OnDestroyView方法来删除片段，但它不起作用...然后在fragmentPagerAdapter中，每个页面都在getItem方法中作为片段调用。最后，在代码末尾，您可以看到三个 ListFragment 类，其中通过 AsyncTask 填充 ListView
public class FragmentAllEvents extends Fragment
{
private static final String TAG_UID = "uid";
private static final String TAG_LOGO = "logo";
private static final String TAG_POKUID = "pokuid";
static ArrayList<HashMap<String, String>> userList;
ArrayList<HashMap<String, String>> userListTotal;
private final Handler handler = new Handler();
HashMap<String, String> userSelected;
EventsFunctions eventsFunctions;
UserFunctions userFunctions;
static ListView lv;
ActionBar actionBar;
MyPagerAdapter adapter;
ViewPager pager;
PagerSlidingTabStrip tabs;
private Drawable oldBackground = null;
private int currentColor = 0xFF666666;
//Context context = this;
@Override public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// Set up the action bar.
actionBar = getActivity().getActionBar();
actionBar.setHomeButtonEnabled(true);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
View v = inflater.inflate(R.layout.all_events_main_strip, container, false);
pager = (ViewPager) v .findViewById(R.id.pager_main);
tabs = (PagerSlidingTabStrip) v.findViewById(R.id.tabs);
adapter = new MyPagerAdapter(getFragmentManager());
pager.setAdapter(adapter);
tabs.setViewPager(pager);
pager.setCurrentItem(1);
return v;
}
@Override
public void onDestroyView()
{
super.onDestroyView();
getActivity().getSupportFragmentManager().beginTransaction().remove(this).commit();
}
public static class MyPagerAdapter extends FragmentPagerAdapter
{
public MyPagerAdapter(FragmentManager fm)
{
super(fm);
}
@Override
public Fragment getItem(int i)
{
switch (i)
{
case 0:
return new PastEvents();
case 1:
return new ToNightEvents();
case 2:
return new FutureEvents();
/*default:
// The other sections of the app are dummy placeholders.
return new ToNightEvents();
*/
}
return null;
}
/**
* A fragment that launches past events list.
*/
public static class PastEvents extends ListFragment implements
PullToRefreshAttacher.OnRefreshListener
{
private ListView pastList;
private PullToRefreshAttacher mPullToRefreshAttacher;
ProgressBar progress;
String tabTime;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View pastView = inflater.inflate(R.layout.pastlist, container, false);
progress = (ProgressBar) pastView.findViewById(R.id.loading_spinner_past);
tabTime="past";
pastList = (ListView) pastView.findViewById(android.R.id.list);
// Now get the PullToRefresh attacher from the Activity. An exercise to the reader
// is to create an implicit interface instead of casting to the concrete Activity
mPullToRefreshAttacher = ((Home) getActivity()).getPullToRefreshAttacher();
// Now set the ScrollView as the refreshable view, and the refresh listener (this)
mPullToRefreshAttacher.addRefreshableView(pastList, this);
new AsyncLoadEvents(getActivity(), progress, pastList, mPullToRefreshAttacher).execute(tabTime);
return pastView;
}
@SuppressWarnings("unchecked")
@Override
public void onListItemClick(ListView listView, View view, int position, long id)
{
super.onListItemClick (listView, view, position, id);
HashMap<String, String> map = (HashMap<String, String>) getListView().getItemAtPosition(position);
//Log.e("AttendList Report", "Clicked list item: " + position +" Content: \n" + map.get(TAG_ID).toString());
Log.e("PastList Report", "Clicked list item: " + position +" Event's content: \n" + map.get(TAG_UID).toString());
Intent intent = new Intent(getActivity(), SingleEventActivity.class);
intent.putExtra("pokuid",map.get(TAG_POKUID)); // Maybe remove attribute toString();
intent.putExtra("uid", map.get(TAG_UID));
intent.putExtra("logo",map.get(TAG_LOGO));
getActivity().startActivity(intent);
}
@Override
public void onRefreshStarted(View view)
{
new AsyncLoadEvents(getActivity(), progress, pastList, mPullToRefreshAttacher).execute(tabTime);
}
}
/**
* A fragment that launches future event list.
*/
public static class FutureEvents extends ListFragment implements
PullToRefreshAttacher.OnRefreshListener
{
private ListView futureList;
private PullToRefreshAttacher mPullToRefreshAttacher;
ProgressBar progress;
String tabTime;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View futureView = inflater.inflate(R.layout.futurelist, container, false);
progress = (ProgressBar) futureView.findViewById(R.id.loading_spinner_future);
tabTime = "future";
futureList = (ListView) futureView.findViewById(android.R.id.list); //change to attendlist if needed
// Now get the PullToRefresh attacher from the Activity. An exercise to the reader
// is to create an implicit interface instead of casting to the concrete Activity
mPullToRefreshAttacher = ((Home) getActivity()).getPullToRefreshAttacher();
// Now set the ScrollView as the refreshable view, and the refresh listener (this)
mPullToRefreshAttacher.addRefreshableView(futureList, this);
new AsyncLoadEvents(getActivity(), progress, futureList, mPullToRefreshAttacher).execute(tabTime);
return futureView;
}
@SuppressWarnings("unchecked")
@Override
public void onListItemClick(ListView listView, View view, int position, long id)
{
super.onListItemClick (listView, view, position, id);
HashMap<String, String> map = (HashMap<String, String>) getListView().getItemAtPosition(position);
Log.e("PastList Report", "Clicked list item: " + position +" Event's content: \n" + map.get(TAG_UID).toString());
Intent intent = new Intent(getActivity(), SingleEventActivity.class);
intent.putExtra("pokuid",map.get(TAG_POKUID)); // Maybe remove attribute toString();
intent.putExtra("uid", map.get(TAG_UID));
intent.putExtra("logo",map.get(TAG_LOGO));
getActivity().startActivity(intent);
}
@Override
public void onRefreshStarted(View view)
{
new AsyncLoadEvents(getActivity(), progress, futureList, mPullToRefreshAttacher).execute(tabTime);
}
}
/**
* A fragment that launches future event list.
*/
public static class ToNightEvents extends ListFragment implements
PullToRefreshAttacher.OnRefreshListener
{
private ListView tonightList;
private PullToRefreshAttacher mPullToRefreshAttacher;
ProgressBar progress;
String tabTime;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View tonightView = inflater.inflate(R.layout.tonightlist, container, false);
progress = (ProgressBar) tonightView.findViewById(R.id.loading_spinner_tonight);
tabTime = "tonight";
tonightList = (ListView) tonightView.findViewById(android.R.id.list); //change to attendlist if needed
// Now get the PullToRefresh attacher from the Activity. An exercise to the reader
// is to create an implicit interface instead of casting to the concrete Activity
mPullToRefreshAttacher = ((Home) getActivity()).getPullToRefreshAttacher();
// Now set the ScrollView as the refreshable view, and the refresh listener (this)
mPullToRefreshAttacher.addRefreshableView(tonightList, this);
new AsyncLoadEvents(getActivity(), progress, tonightList, mPullToRefreshAttacher).execute(tabTime);
return tonightView;
}
@SuppressWarnings("unchecked")
@Override
public void onListItemClick(ListView listView, View view, int position, long id)
{
super.onListItemClick (listView, view, position, id);
HashMap<String, String> map = (HashMap<String, String>) getListView().getItemAtPosition(position);
Log.e("PastList Report", "Clicked list item: " + position +" Event's content: \n" + map.get(TAG_UID).toString());
Intent intent = new Intent(getActivity(), SingleEventActivity.class);
intent.putExtra("pokuid",map.get(TAG_POKUID)); // Maybe remove attribute toString();
intent.putExtra("uid", map.get(TAG_UID));
intent.putExtra("logo",map.get(TAG_LOGO));
getActivity().startActivity(intent);
}
@Override
public void onRefreshStarted(View view)
{
new AsyncLoadEvents(getActivity(), progress, tonightList, mPullToRefreshAttacher).execute(tabTime);
}
}
public String[] titles=
{
"Past",
"Tonight",
"Future"
};
@Override
public int getCount()
{
return titles.length;
}
@Override
public CharSequence getPageTitle(int position)
{
return titles[position];
}
}
}
最佳答案
如果您在 Activity 中，这通常会起作用，但我猜您是在 Fragment 中，因为您发布的代码是 onCreateView() 方法。问题是您正在尝试使用 Activity 的 FragmentManager，并且您应该使用 Fragment 的 FragmentManager。这个 FragmentManager 不是你所需要的。试试这个:
adapter = new MyPagerAdapter(getChildFragmentManager());
我想我有点晚了，但如果有人碰巧遇到同样的错误，这里就是解决方案 =)
问。
关于android-listview - 替换片段时无法在 PagerSlidingTabStrip 中加载选项卡，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/19126208/