问题
Can anyone point me to an example or show me how to create a simple Tabbed Dialog in Android where the contents of each tab are Fragments? All the examples/tutorials I have found are about Fragments and Tabs, but nothing specific to DialogFragments.
The documentation for FragmentTabHost shows how to create tabs within normal fragments using getChildFragmentManager(). I'm assuming this should also work when the fragment is a DialogFragment but when I try it I get:
java.lang.IllegalStateException: Fragment does not have a view at android.support.v4.app.Fragment$1.findViewById(Fragment.java:1425)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:901)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
...
Here's my code for setting up the view (which is then passed to AlertDialog.setView()):
private void setupView(View v) {
mTabHost = (FragmentTabHost) v.findViewById(android.R.id.tabhost);
mTabHost.setup(getActivity(), getChildFragmentManager(), R.id.realtabcontent);
mTabHost.addTab(mTabHost.newTabSpec("tab1").setIndicator("Tab1"),
MyDialogFragment.class, null);
}
回答1:
Spent a lot of time to get it working, but no luck. The only solution I found is create dummy fragment tabhost and use viewpager with fragments instead of tabhost fragments
voters_dialog.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical"
>
<android.support.v4.app.FragmentTabHost
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tabs"
>
</android.support.v4.app.FragmentTabHost>
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"/>
</LinearLayout>
Dialog class, the trick is use onCreateView not onCreateDialog
public class VotersDialog extends DialogFragment {
private FragmentTabHost mTabHost;
private ViewPager viewPager;
private VotersPagerAdapter adapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.voters_dialog, container);
getDialog().setTitle(getArguments().getString("title"));
mTabHost = (FragmentTabHost) view.findViewById(R.id.tabs);
mTabHost.setup(getActivity(), getChildFragmentManager());
mTabHost.addTab(mTabHost.newTabSpec("tab1").setIndicator("Плюсов"), Fragment.class, null);
mTabHost.addTab(mTabHost.newTabSpec("tab2").setIndicator("Минусов"), Fragment.class, null);
adapter = new VotersPagerAdapter(getChildFragmentManager(), getArguments());
adapter.setTitles(new String[]{"Плюсов", "Минусов"});
viewPager = (ViewPager)view.findViewById(R.id.pager);
viewPager.setAdapter(adapter);
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int i, float v, int i2) {
}
@Override
public void onPageSelected(int i) {
mTabHost.setCurrentTab(i);
}
@Override
public void onPageScrollStateChanged(int i) {
}
});
mTabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {
@Override
public void onTabChanged(String s) {
int i = mTabHost.getCurrentTab();
viewPager.setCurrentItem(i);
}
});
return view;
}
public class VotersPagerAdapter extends FragmentPagerAdapter {
Bundle bundle;
String [] titles;
public VotersPagerAdapter(FragmentManager fm) {
super(fm);
}
public VotersPagerAdapter(FragmentManager fm, Bundle bundle) {
super(fm);
this.bundle = bundle;
}
@Override
public Fragment getItem(int num) {
Fragment fragment = new VotersListFragment();
Bundle args = new Bundle();
args.putSerializable("voters",bundle.getSerializable( num == 0 ? "pros" : "cons"));
fragment.setArguments(args);
return fragment;
}
@Override
public int getCount() {
return 2;
}
@Override
public CharSequence getPageTitle(int position) {
return titles[position];
}
public void setTitles(String[] titles) {
this.titles = titles;
}
}
public static class VotersListFragment extends ListFragment {
List<String> voters;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.list_fragment, container, false);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
voters = (ArrayList) getArguments().getSerializable("voters");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, voters);
setListAdapter(adapter);
getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Intent intent = new Intent(getActivity(), ProfileActivity_.class);
String login = voters.get(i);
intent.putExtra("login", Utils.encodeString(login.substring(0, login.indexOf("(")).trim()));
startActivity(intent);
}
});
}
}
}
Here is result, now you can press tabs or swipe fragments
回答2:
I was looking for the same solution but nothing worked out for me so I built my own Android tabbed dialog containing fragments. might be it may help someone.
you can checkout the complete source code from here
回答3:
You should use a DialogFragment, TabLayout and ViewPager. For instance, your dialog fragment's view may look like this:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<android.support.v4.view.ViewPager
android:id="@+id/masterViewPager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
Build your adapter and make sure you override the getPageTitleMethod, e.g:
public class CustomAdapter extends FragmentPagerAdapter {
List<Fragment> mFragmentCollection = new ArrayList<>();
List<String> mTitleCollection = new ArrayList<>();
public CustomAdapter(FragmentManager fm) {
super(fm);
}
public void addFragment(String title, Fragment fragment)
{
mTitleCollection.add(title);
mFragmentCollection.add(fragment);
}
//Needed for
@Override
public CharSequence getPageTitle(int position) {
return mTitleCollection.get(position);
}
@Override
public Fragment getItem(int position) {
return mFragmentCollection.get(position);
}
@Override
public int getCount() {
return mFragmentCollection.size();
}
}
In the OnCreateView of your dialog, you should setup your viewpager with the tabLayout:
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootview = inflater.inflate(R.layout.dialog_sample,container,false);
tabLayout = (TabLayout) rootview.findViewById(R.id.tabLayout);
viewPager = (ViewPager) rootview.findViewById(R.id.masterViewPager);
CustomAdapter adapter = new CustomAdapter(getChildFragmentManager());
adapter.addFragment("Boy",CustomFragment.createInstance("John"));
adapter.addFragment("Girl",CustomFragment.createInstance("Stacy"));
adapter.addFragment("Robot",CustomFragment.createInstance("Aeon"));
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);
return rootview;
}
I have a blog post written on it here: here.
回答4:
Try using DialogFragment instead and on your dialogfragment layout include a LinearLayout for fragmentTransaction.
FragmentTransaction t = getSupportFragmentManager().beginTransaction();
String Tag = fragment.getClass().getSimpleName();
t.replace(R.id.llTabFragmentContainer, fragment, Tag);
t.commit();
fragment is your tab fragment. cheeers
来源：https://stackoverflow.com/questions/16634519/how-to-create-an-android-tabbed-dialog-containing-fragments