Question

我在我的应用程序中使用com.astuetz.PagerSlidingTabStrip来在我的应用程序中呈现多个选项卡。我的要求是，当用户点击某些内容时，我需要添加更多标签，或者在向标签的最后右侧滑动时添加更多标签。我查看了几乎所有的stackoverflow线程，但找不到任何适当的帮助。

以下是我正在做的事情 - 布局文件（XML）：

<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <com.astuetz.PagerSlidingTabStrip
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="44dp"
        app:pstsShouldExpand="true"
        app:pstsTextAllCaps="true"
        app:pstsIndicatorHeight="4dp"
        app:pstsIndicatorColor="@color/theme_color">
    </com.astuetz.PagerSlidingTabStrip>

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

    </android.support.v4.view.ViewPager>
</LinearLayout>

片段：

public class MandiEntryAddTabFragment extends BaseFragment {
    private ViewPager viewPager;
    private View view;
    private PagerSlidingTabStrip mTabs;
    private MyFragmentPagerAdapter mAdapter;



    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        if (view == null) {
            view = inflater.inflate(R.layout.fragment_mandi_add, container, false);

            if (viewPager == null) {
                viewPager = (ViewPager)view.findViewById(R.id.pager);
            }
            getBaseActivity().setTitle("Material Entry");
            FragmentManager manager = getChildFragmentManager();
            viewPager.setAdapter(mAdapter = new   MyFragmentPagerAdapter(manager));
            mTabs = (PagerSlidingTabStrip) view.findViewById(R.id.tabs);
            mTabs.setViewPager(viewPager);
        }
        return view;

    }

    class MyFragmentPagerAdapter extends FragmentPagerAdapter {

        public MyFragmentPagerAdapter(FragmentManager fm) {
            super(fm);
        }
        private ArrayList<String> tabs = new ArrayList<>();

        @Override
        public Fragment getItem(int item) {
            Fragment fragment = null;

            if (item == 0) {
                fragment = new MandiEntryFragment();
            } else if (item == 1) {
                fragment = new MandiEntryFarmerFragment();
            } else if (item == 2) {
                fragment = new MandiEntryFarmerFragment();
            } else if (item == 3) {
                fragment = new MandiEntryFarmerFragment();
            } else if (item == 4) {
                fragment = new MandiEntryFarmerFragment();
            }/* else if (item == 5) {
                fragment = new MandiEntryFarmerFragment();
                new MyFragmentPagerAdapter(getChildFragmentManager()).addTab("test " + (mAdapter.getCount() + 1));
            }*/
            return fragment;
        }

        @Override
        public int getCount() {
            return tabs.size();
        }

        @Override
        public CharSequence getPageTitle(int position) {
            String title = new String();
            if (position == 0) {
                title = "Entry";
            } else if (position == 1) {
                title = "Farmer 1";
            } else if (position == 2) {
                title = "Farmer 2";
            } else if (position == 3) {
                title = "Farmer 3";
            } else if (position == 4) {
                title = "Farmer 4";
                tabs.get(position);
            } /*else if (position == 5) {
                title = "Add";

                public CharSequence getPageTitle(int position) { return   tabs.get(position);
                }

            }*/
            return title;
        }

        public void addTab(String tab) {
            tabs.add(tab);
            notifyDataSetChanged();
            mTabs.notifyDataSetChanged();
        }

    }


    @Override
    public void fetchAndShowData() {
        Fragment fragment = getActiveFragment(viewPager);
        if (fragment != null) {
            ((BaseFragment) fragment).fetchAndShowData();
        }
    }
}

我得到的错误是：

E / AndroidRuntime：java.lang.RuntimeException：无法启动活动 ComponentInfo {} c2c.cloud4things.com/com.cloud4things.c2c.CommunityHomeActivity： java.lang.IndexOutOfBoundsException：索引4无效，大小为0

同样在上述片段的getPageTitle和onCreateView函数上。我可以理解getCount方法存在一些问题。但我不知道该怎么做。请帮助我我们非常感谢您。在此先感谢！

PagerSlidingTabStrip（com.astuetz.PagerSlidingTabStrip）如何在运行时动态添加标签？

0 个答案: