我已经设置了一个标签视图，该标签视图使用viewpager为每个标签设置了自定义片段。这是我的代码：
持有片段
public class FragInboxMainView extends Fragment implements CGFragment {
private CGController controller;
private CGFragment thisFragment;
@Bind(R.id.inboxViewPager)ViewPager inboxViewPager;
@Bind(R.id.inboxTabs)TabLayout inboxTabLayout;
@Bind(R.id.inbox_progress_wheel)ProgressWheel inboxProgressWheel;
public FragInboxMainView(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_inbox_mainview, container, false);
ButterKnife.bind(this, rootView);
thisFragment = this;
Globals g = Globals.getInstance();
/** Show loading spinner */
this.inboxProgressWheel.setBarColor(ContextCompat.getColor(controller.getContext(), g.getUserObject().getUserThemeColor()));
this.inboxProgressWheel.setVisibility(View.VISIBLE);
/** Display the profile information based off the ID */
controller.displayInbox(thisFragment);
return rootView;
}
public void hideProgressSpinner() {
this.inboxProgressWheel.setVisibility(View.GONE);
}
public ViewPager getInboxViewPager() {
return this.inboxViewPager;
}
public TabLayout getInboxTabLayout() {
return this.inboxTabLayout;
}
}
其布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:wheel="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.TabLayout
android:id="@+id/inboxTabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="scrollable" />
<com.pnikosis.materialishprogress.ProgressWheel
android:id="@+id/inbox_progress_wheel"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center"
wheel:matProg_barColor="#5588FF"
wheel:matProg_progressIndeterminate="true"
android:visibility="gone"/>
<android.support.v4.view.ViewPager
android:id="@+id/inboxViewPager"
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight="1"
android:background="@android:color/white" />
</LinearLayout>
Tab片段及其充气文件
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
android:id="@+id/main_content"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.baoyz.widget.PullRefreshLayout
android:id="@+id/tabPullRefresh"
android:layout_width="match_parent"
android:layout_height="match_parent">
<view
android:id="@+id/tabRecyclerHolder"
class="android.support.v7.widget.RecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="8dp"
android:paddingBottom="8dp"
android:clipToPadding="false"
android:layout_centerInParent="true"/>
</com.baoyz.widget.PullRefreshLayout>
<com.melnykov.fab.FloatingActionButton
android:id="@+id/tabFab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right"
android:layout_margin="16dp"
android:src="@mipmap/ic_add_white"/>
</android.support.design.widget.CoordinatorLayout>
public class TabRecyclerHolder extends Fragment {
@Bind(R.id.tabRecyclerHolder) RecyclerView tabRecyclerHolder;
@Bind(R.id.tabPullRefresh) PullRefreshLayout tabPullRefresh;
@Bind(R.id.tabFab) FloatingActionButton recyclerFab;
private String tabTitle = "Title";
public TabRecyclerHolder(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.tab_recycler_holder, container, false);
ButterKnife.bind(this, rootView);
recyclerFab.hide(false);
tabPullRefresh.setRefreshStyle(PullRefreshLayout.STYLE_MATERIAL);
return rootView;
}
public RecyclerView getTabRecyclerHolder() {
return this.tabRecyclerHolder;
}
public FloatingActionButton getRecyclerFab() {
return this.recyclerFab;
}
public String getTabTitle() {
return this.tabTitle;
}
public void setTabTitle(String title) {
this.tabTitle = title;
}
public PullRefreshLayout getTabPullRefresh() {
return this.tabPullRefresh;
}
}
我的标签适配器
public class TabPagerAdapter extends FragmentStatePagerAdapter {
private CGController controller;
private List<Object> items;
public TabPagerAdapter(FragmentManager fm, CGController controller, List<Object> items) {
super(fm);
this.controller = controller;
this.items = items;
}
@Override
public int getCount() {
return items.size();
}
@Override
public Fragment getItem(int num) {
return (TabRecyclerHolder)items.get(num);
}
@Override
public String getPageTitle(int num){
return ((TabRecyclerHolder)items.get(num)).getTabTitle();
}
}
处理代码
public void viewInbox() {
/** Set up the views */
receivedHolder = new TabRecyclerHolder();
receivedHolder.setTabTitle(Constants.TAB_INBOX_RECEIVED);
sentHolder = new TabRecyclerHolder();
sentHolder.setTabTitle(Constants.TAB_INBOX_SENT);
tabs.add(receivedHolder);
tabs.add(sentHolder);
/** Set up the tabs */
final ViewPager inboxViewPager = inboxFragment.getInboxViewPager();
TabLayout inboxTabLayout = inboxFragment.getInboxTabLayout();
/** Set the adapter for the view pager */
inboxViewPager.setAdapter(new TabPagerAdapter(inboxFragment.getChildFragmentManager(), controller, tabs));
/** set up the tab look and feel */
inboxTabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
inboxTabLayout.setTabMode(TabLayout.MODE_FIXED);
inboxViewPager.setOffscreenPageLimit(3);
inboxViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(inboxTabLayout));
inboxTabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
inboxViewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
/** And, display! */
inboxTabLayout.setupWithViewPager(inboxViewPager);
receivedAdapter = new RecyclerListAdapter(controller, items);
final RecyclerView receivedList = receivedHolder.getTabRecyclerHolder();
receivedList.setLayoutManager(new LinearLayoutManager(controller.getContext()));
receivedList.setAdapter(receivedAdapter);
}
我错过了一些代码，但与问题无关。最初查看片段时，该代码可完美运行。但是，由于我的应用程序包含一个活动，并且仅替换了导航到的每个片段的内容视图，因此每个片段都将添加到后退堆栈，然后在按下后退按钮时弹出。我的问题是，当导航到该片段时，选项卡内的视图不会膨胀，这意味着无法访问任何元素（因此，应用程序在尝试在recyclerview中显示数据时崩溃等）。
我看过这个问题：TabLayout ViewPager Not Loading When Using Backstack并实现了它的建议（设置寻呼机适配器时使用了getChildFragmentManager()，但是并没有解决我的问题。
将不胜感激！
[将此public View onCreateView(LayoutInflater inflater,...更改为public void onViewCreated (View view, Bundle savedInstanceState)] >>
所以您将拥有这样的东西
@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.tab_recycler_holder, container, false); }然后
@Override public void onViewCreated (View view, Bundle savedInstanceState){ ButterKnife.bind(this, view); recyclerFab.hide(false); tabPullRefresh.setRefreshStyle(PullRefreshLayout.STYLE_MATERIAL); ...看看是否有帮助
在TabPagerAdapter中将FragmentStatePagerAdapter扩展为