DialogFragment中添加后ListView不刷新

Question

我有一个存储在 SugarORM 数据库中的对象（间隔）列表，我将其添加到 DialogFragment 中。 DialogFragment 从 MainActiviy 显示，并在 DialogFragment 本身中保存和创建对象，然后调用 DialogFragment 的 dialoglistener 接口，该接口与 MainActivity 通信，然后通知 ListFragment（显示在选项卡式 ViewPager 中）它应该刷新列表。然而，这不会发生。应用程序恢复或重新启动后列表会更新

我看过这里 How to refresh the ListView after change the data with the DialogFragment? 和这里 Receive result from DialogFragment 没有成功。

提前致谢！

对话框片段代码

public class NewIntervalDialogFragment extends android.support.v4.app.DialogFragment {
    private Button btnSave;
    private EditText etLabel;
    public NewIntervalDialogFragment() {
        // Required empty public constructor
    }

public static NewIntervalDialogFragment newInstance() {
    return new NewIntervalDialogFragment();
}



@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View newView = inflater.inflate(R.layout.fragment_new_interval_dialog, container, false);

    //initiate all Variable and set up view 

    btnSave = (Button) newView.findViewById(R.id.btnSave);
    btnSave.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            EditDialogListener activity = (EditDialogListener) getActivity();
            if(activity==null){
                Log.d("NULL" ,"NULL ACTIVITY");
            }
            long workMins = npMinutesWork.getValue() * 60000;
            long restMins = npMinutesRest.getValue() * 60000;
            long workSecs = npSecondsWork.getValue() * 1000;
            long restSecs = npSecondsRest.getValue() * 1000;
            String label = etLabel.getText().toString();
            Interval newInterval = new Interval(label, workMins + workSecs, restMins + restSecs);
            newInterval.save();
            activity.onFinishEditDialog();
            dismiss();
        }
    });
    return newView;


}

public interface EditDialogListener {
    void onFinishEditDialog();
}

}

主活动

public class MainActivity extends ActionBarActivity implements ActionBar.TabListener, IntervalListFragment.OnListFragmentInteractionListener, NewIntervalDialogFragment.EditDialogListener{


    SectionsPagerAdapter mSectionsPagerAdapter;


    ViewPager mViewPager;

    static final String INTERVALS_KEY = "Saved Intervals";
    static final String WORKOUT_KEY = "Current Workout";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        FloatingActionButton mFab = new FloatingActionButton.Builder(this)
                .withColor(getResources().getColor(R.color.logo_color))
                .withDrawable(getResources().getDrawable(R.drawable.plus))
                .withSize(72)
                .withMargins(0, 0, 16, 16)
                .create();

        mFab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog();
            }
        });

        final ActionBar actionBar = getSupportActionBar();
        getSupportActionBar().setDisplayUseLogoEnabled(true);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);


        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager(), this);

        mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
            @Override
            public void onPageSelected(int position) {
                actionBar.setSelectedNavigationItem(position);
            }
        });


        for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {

            actionBar.addTab(
                    actionBar.newTab()
                            .setText(mSectionsPagerAdapter.getPageTitle(i))
                            .setTabListener(this));
        }



        FragmentManager fragmentManager = getSupportFragmentManager();
        fragmentManager.beginTransaction().add(mSectionsPagerAdapter.getItem(0), INTERVALS_KEY).commit();
        fragmentManager.beginTransaction().add(mSectionsPagerAdapter.getItem(1), WORKOUT_KEY).commit();
    }

    void showDialog(){
        final DialogFragment newFragment = NewIntervalDialogFragment.newInstance();
        newFragment.show(getSupportFragmentManager(), "dialog");
    }

    @Override
    public void onFinishEditDialog() {

            FragmentManager fragmentManager = getSupportFragmentManager();
            IntervalListFragment fragment =   (IntervalListFragment) fragmentManager.findFragmentByTag(INTERVALS_KEY);
            fragment.refresh();

    }
}

列表片段代码

public class IntervalListFragment extends android.support.v4.app.ListFragment {

private OnListFragmentInteractionListener mListener;
public int DIALOG_REQUEST_CODE = 101;
private ArrayList<Interval> intervals;
private IntervalListAdapter adapter;


/**
 * Mandatory empty constructor for the fragment manager to instantiate the
 * fragment (e.g. upon screen orientation changes).
 */
public IntervalListFragment() {
}

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



    try{
    intervals = (ArrayList<Interval>) Interval.listAll(Interval.class);}
    catch (android.database.sqlite.SQLiteException e){
        intervals = new ArrayList<>(10);
    }
    //Interval example = new Interval("Situps", 10000L, 50000L);
    //intervals.add(example);
    adapter = new IntervalListAdapter(getActivity(), intervals);
    setListAdapter(adapter);
}

public void refresh(){
    Log.d("REFRESH", "REFRESH CALLED");
    adapter.clear();
    adapter.refresh(Interval.listAll(Interval.class));

}

列表适配器代码

public class IntervalListAdapter extends ArrayAdapter<Interval> {

public void refresh(List<Interval> intervals)
{
    this.intervals = intervals;
    notifyDataSetChanged();
}e

Answer 1

添加代码

 adapter.setNotifyDataChanged()