1
我有中有一個viewpager片段ViewPager內
頁的一個活動中有另一個viewpager片段
的問題是，當我到達內viewpager片段的頁面，內部viewpager片段的「onCreateView」不會被調用，所以頁面是空白的。
這是爲什麼？
這裏是我的代碼：
fragment_viewpager.xml
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight="1" >
</android.support.v4.view.ViewPager>
fragment_viewpager_with_logo.xml
<include layout="@layout/logo" />
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight="1" >
</android.support.v4.view.ViewPager>
public class ViewPagerFragment extends Fragment {
private ViewPager fragmentPager;
private PagerAdapter fragmentAdapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (container instanceof ViewPager) {
return inflater.inflate(R.layout.fragment_viewpager_with_logo, container, false);
}
return inflater.inflate(R.layout.fragment_viewpager, container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
fragmentPager = (ViewPager)getView().findViewById(R.id.pager);
fragmentPager.setAdapter(fragmentAdapter);
}
public void setAdapter(PurchaseFragmentStatePagerAdapter fragmentAdapter) {
this.fragmentAdapter = fragmentAdapter;
}
public void setCurrentItem(int i) {
fragmentPager.setCurrentItem(i);
}
public int getCurrentItem() {
return fragmentPager.getCurrentItem();
}
public void setOnPageChangeListener(OnPageChangeListener l) {
if (fragmentPager == null) {
fragmentPager = (ViewPager) getView().findViewById(R.id.pager);
}
fragmentPager.setOnPageChangeListener(l);
}
}
在一些活動：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_container);
MyFragmentStatePagerAdapter fragmentAdapter = new MyStatePagerAdapter(getSupportFragmentManager());
List<Fragment> fragments = new ArrayList<Fragment>();
fragments.add(settingsFragment);// settings
ViewPagerFragment vpFragment = new ViewPagerFragment();
fragments.add(vpFragment);
fragmentAdapter.setFragments(fragments);
fragmentPager.setAdapter(fragmentAdapter);
MyFragmentStatePagerAdapter innerFragmentAdapter = new MyFragmentStatePagerAdapter(getSupportFragmentManager());
List<Fragment> innerFragments = new ArrayList<Fragment>();
innerFragments.add(settingsFragment);
innerFragmentAdapter.setFragments(innerFragments);
vpFragment.setAdapter(innerFragmentAdapter);
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.add(R.id.content_fragment, fragmentPager).commit();
}
MyFragmentStatePagerAdapter
public class MyFragmentStatePagerAdapter extends FragmentStatePagerAdapter {
private List<BaseFragment> fragments;
@Inject
public MyFragmentStatePagerAdapter(FragmentManager fm) {
super(fm);
}
public void setFragments(List<Fragment> fragments) {
this.fragments = fragments;
}
@Override
public BaseFragment getItem(int position) {
return fragments.get(position);
}
@Override
public int getCount() {
return fragments == null ? 0 : fragments.size();
}
}