android - 使用动态数据填充 Android ViewPager

Question

大半夜的时间里，我一直在绞尽脑汁。我已经尝试了无数次（不成功）尝试自己解决它。

下面是我的完整代码。此外，它可以在Github上找到。

当我运行应用程序时，显示的数据很少是显示在标题栏或我放在屏幕上的（临时）TextViews 中的月份（以确保我得到了我期望的正确日期/月份。

public class MainActivity extends FragmentActivity {
    ArrayList<DataSummary> summary;
    int mMonth = 0, mYear = 0;
    /**
     * The {@link android.support.v4.view.PagerAdapter} that will provide
     * fragments for each of the sections. We use a
     * {@link android.support.v4.app.FragmentPagerAdapter} derivative, which
     * will keep every loaded fragment in memory. If this becomes too memory
     * intensive, it may be best to switch to a
     * {@link android.support.v4.app.FragmentStatePagerAdapter}.
     */
    SectionsPagerAdapter mSectionsPagerAdapter;

    /**
     * The {@link ViewPager} that will host the section contents.
     */
    ViewPager mViewPager;

    static DbHelper mDbHelper;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mDbHelper = DbHelper.getInstance(this);

        summary = mDbHelper.getDataSummary(DbHelper.TABLE_HISTORY);

        setContentView(R.layout.activity_main);
        // Create the adapter that will return a fragment for each of the three
        // primary sections of the app.
        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

        // Set up the ViewPager with the sections adapter.
        mViewPager = (ViewPager) findViewById(R.id.pager);
        mViewPager.setAdapter(mSectionsPagerAdapter);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    /**
     * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
     * one of the primary sections of the app.
     */
    public class SectionsPagerAdapter extends FragmentStatePagerAdapter {

        public SectionsPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int i) {
            Fragment fragment = new DummySectionFragment();
            Bundle args = new Bundle();
            DataSummary sumItem = summary.get(i);
            args.putString(DummySectionFragment.YEAR, sumItem.getYear());
            args.putString(DummySectionFragment.MONTH, sumItem.getMonth());
            args.putString(DummySectionFragment.COUNT, sumItem.getCount());
            fragment.setArguments(args);
            return fragment;
        }

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

        @Override
        public CharSequence getPageTitle(int position) {
            DataSummary sumItem = summary.get(position);
            String monthName = Utility.getMonth(Integer.valueOf(sumItem.getMonth())).toUpperCase();
            CharSequence pageTitle = monthName + " " + sumItem.getYear() + "(" + sumItem.getCount() + ")";
            return pageTitle;
        }
    }

    /**
     * A dummy fragment representing a section of the app, but that simply
     * displays dummy text.
     */
    public static class DummySectionFragment extends Fragment {
        public static final String YEAR = "year";
        public static final String MONTH = "month";
        public static final String COUNT = "count";

        public DummySectionFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            Bundle args = getArguments();
            String strYear = args.getString(YEAR);
            String strMonth = args.getString(MONTH);
            Integer iMonth = Integer.valueOf(strMonth);
            ArrayList<History> wods = mDbHelper.getHistoryByMonth(strYear, 
                    Utility.pad(iMonth), Constants.SORT_BY_DATE);

            View mFragmentView = inflater.inflate(R.layout.wod_history, null);
            TextView tvMonth = (TextView) mFragmentView.findViewById(R.id.wodHistoryMonth);
            TextView tvYear = (TextView) mFragmentView.findViewById(R.id.wodHistoryYear);
            ListView listHistory = (ListView) mFragmentView.findViewById(R.id.listHistory);

            tvMonth.setText(strMonth);
            tvYear.setText(strYear);
            CustomHistoryView chv = new CustomHistoryView(container.getContext(), wods);
            listHistory.setAdapter(chv);
            return mFragmentView;
        }
    }
}

这是一些屏幕截图。在此处输入图像描述