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我一直在整天與這個問題作鬥爭，我認爲，仍然無法做到。 我正在爲我的一位朋友構建一些應用程序。 我使用ActionBarSherlock，所以我可以使用操作欄和其他一些像瀏覽器一樣的東西。無論如何，我打算進入主要活動：3個標籤，每個顯示一個片段（3個不同的片段），每個片段都必須顯示fragmentPagerView，這樣我纔可以前後滾動片段（也許我我會添加「永遠滾動」在我得到這個權利之後的某個點）帶有頁面瀏覽的片段的選項卡
事情是，我已經得到我的標籤和運行（我從apiDemos複製了一些代碼） 但是我可以' t得到的標籤顯示，我找不到原因（它甚至沒有崩潰）
這是我的MainActivity持有navActionbar（和一些選項）
public class MainActivity extends SherlockFragmentActivity
{
SherlockFragment yesTabFragment = new YesTabFragment();
SherlockFragment newTabFragment = new NewTabFragment();
SherlockFragment trendingTabFragment = new TrendingTabFragment();
private void createTabs()
{
// put ActionBar to nav. mode
ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab yesTab = actionBar
.newTab()
.setText("yes")
.setTabListener(new TabListener<YesTabFragment>(
this, "yes", YesTabFragment.class));
actionBar.addTab(yesTab);
ActionBar.Tab trendingTab = actionBar
.newTab()
.setText("trending")
.setTabListener(new TabListener<TrendingTabFragment>(
this, "trending", TrendingTabFragment.class));
actionBar.addTab(trendingTab);
ActionBar.Tab newTab = actionBar
.newTab()
.setText("new")
.setTabListener(new TabListener<NewTabFragment>(
this, "new", NewTabFragment.class));
actionBar.addTab(newTab);
}
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
createTabs();
}
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.main_activity_menu, menu);
return true;
}
public static class TabListener<T extends SherlockFragment> implements ActionBar.TabListener
{
private final SherlockFragmentActivity mActivity;
private final String mTag;
private final Class<T> mClass;
private final Bundle mArgs;
private SherlockFragment mFragment;
public TabListener(SherlockFragmentActivity activity, String tag, Class<T> clz)
{
this(activity, tag, clz, null);
}
public TabListener(SherlockFragmentActivity activity, String tag, Class<T> clz, Bundle args)
{
mActivity = activity;
mTag = tag;
mClass = clz;
mArgs = args;
// Check to see if we already have a fragment for this tab, probably
// from a previously saved state. If so, deactivate it, because our
// initial state is that a tab isn't shown.
mFragment = (SherlockFragment)mActivity.getSupportFragmentManager().findFragmentByTag(mTag);
if (mFragment != null && !mFragment.isDetached())
{
FragmentTransaction ft = mActivity.getSupportFragmentManager().beginTransaction();
ft.detach(mFragment);
ft.commit();
}
}
public void onTabSelected(Tab tab, FragmentTransaction ft)
{
if (mFragment == null)
{
mFragment = (SherlockFragment)SherlockFragment.instantiate(mActivity, mClass.getName(), mArgs);
ft.add(android.R.id.content, mFragment, mTag);
}
else
{
ft.attach(mFragment);
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft)
{
if (mFragment != null)
{
ft.detach(mFragment);
}
}
public void onTabReselected(Tab tab, FragmentTransaction ft)
{
//Toast.makeText(mActivity, "Reselected!", Toast.LENGTH_SHORT).show();
}
}
}
正如我已經說過我複製了TabListener實現直接從apiDemos（雖然我寫了一個完全相同）
這是標籤片段之一的執行（他們都是相同）
public class YesTabFragment extends SherlockFragment
{
View _fragmentView;
private Vector<stuff> list;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
_fragmentView = inflater.inflate(R.layout.yes_fragment, container, false);
ViewPager pager = (ViewPager)_fragmentView.findViewById(R.id.gag_pager);
API api = API.getInstance();
list = api.get("Yes", 1, 10);
MyFragmentPagerAdapter adapter = new MyFragmentPagerAdapter(getFragmentManager(), listOfGags);
pager.setAdapter(adapter);
return _fragmentView;
}
}
的yesTabFragment類
public class YesTabFragment extends SherlockFragment
{
View _fragmentView;
private Vector<things> list;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
_fragmentView = inflater.inflate(R.layout.yes_fragment, container, false);
ViewPager pager = (ViewPager)_fragmentView.findViewById(R.id.thing_pager);
API api = API.getInstance();
list = api.get("Yes", 1, 10);
MyFragmentPagerAdapter adapter = new MyFragmentPagerAdapter(getFragmentManager(), list);
pager.setAdapter(adapter);
return _fragmentView;
}
}
，當然還有XML爲主要的執行情況和是選項卡（再次標籤幾乎相同）
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/List"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:orientation="vertical" >
<FrameLayout
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>
</LinearLayout>
和yesTab
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<android.support.v4.view.ViewPager
android:id="@+id/thing_pager"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</android.support.v4.view.ViewPager>
</LinearLayout>
我實在找不出爲什麼標籤片段不更換的FrameLayout和告訴我viewpager的原因。
我真的可以使用一些很好的意見在這裏，因爲我確實失去了一些東西大這裏，搞不懂是什麼...
由於頭...