public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
Log.v(TAG, "onCreateView");
View rootView = inflater.inflate(R.layout.fragment_home, container, false);
// setting up the view pager and tab layout
mViewPager = (ViewPager) rootView.findViewById(R.id.view_pager);
mTabLayout = (TabLayout) rootView.findViewById(R.id.tab_layout);
PageAdapter adapter = new PageAdapter(getFragmentManager());
mViewPager.setAdapter(adapter);
mTabLayout.setupWithViewPager(mViewPager);
mViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(mTabLayout));
return rootView;
}
我的自定义寻呼机适配器如下所示：
public class PageAdapter extends FragmentStatePagerAdapter {
public PageAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
return new GroupTabFragment(position);
}
@Override
public CharSequence getPageTitle(int position) {
String title = "";
switch (position) {
case 0:
title = "Game"; // this is from a template, i have to
break; // return title dynamically
case 1:
title = "Movie";
break;
}
return title;
}
@Override
public int getCount() {
return 2; // the tabs number is a subject of change
} // i don't know it from the begining
}
我的问题是，单击按钮或类似的东西时，我必须添加或删除选项卡。
每个选项卡将显示经典的对象列表。谢谢你。
有两种方法可以执行此操作，但ViewPager不适合动态删除：
1）ArrayList<Fragment> data作为参数传递给PageAdapter
然后，适配器将如下所示：
public class PageAdapter extends FragmentStatePagerAdapter {
private ArrayList<Fragment> data;
public PageAdapter(FragmentManager fm, ArrayList<Fragment> data) {
super(fm);
this.data = data;
}
@Override
public Fragment getItem(int position) {
return data.get(position);
}
@Override
public CharSequence getPageTitle(int position) {
String title = "";
switch (position) {
case 0:
title = "Game"; // this is from a template, i have to
break; // return title dynamically
case 1:
title = "Movie";
break;
}
return title;
}
@Override
public int getCount() {
return data.size(); // the tabs number is a subject of change
} // i don't know it from the begining
}
删除您在“活动\片段”中执行的项目：
data.remove(fragmentId);
adapter.notifyDataSetChanged();
2）每次要删除项目时都要重新创建适配器。因此，您基本上可以使用新数据创建新适配器。
data.remove(fragmentId);
PageAdapter adapter = new PageAdapter(getFragmentManager(), data);
mViewPager.setAdapter(adapter);
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