Question

在fragment中，我创建了一个包含MapView（MapBox）的对话框。这加载了很多。该对话框将用户（当用户点击按钮时）重定向到另一个Activity。当用户按下Activity（转到dialog）时，MapView根本不再加载，直到被按下。我正在使用MapBox's的{{1}}实现。

我尝试通过在MapView中调用各自的方法来实现onPause，onResume，onLowMemory和onDestroy方法，但这样MapView 1}}根本不加载，即使我点击它也不加载。

适配器的片段：

MapView

对话：

public class DayAdapter extends FragmentStatePagerAdapter {

/**
 * Construct the fragment pager adapter.
 * @param fragmentManager The manager
 */
public DayAdapter(final FragmentManager fragmentManager) {
    super(fragmentManager);
}

/**
 * Gets the Fragment to be rendered at <i>position</i>.
 * @param position The position of the item.
 * @return Fragment The Fragment that has to be rendered.
 */
@Override
public Fragment getItem(int position) {
    Fragment fragment = new DayFragment();
    Bundle args = new Bundle();
    args.putInt(DayFragment.ARG_OBJECT, position);
    fragment.setArguments(args);
    return fragment;
}

/**
 * Gets the total count of items.
 * @return Integer The amount of items.
 */
@Override
public int getCount() {
    return 100;
}

/**
 * Fragment to display the Day.
 */
public static class DayFragment extends Fragment {
    public static final String ARG_OBJECT = "object";
    private final Client client = Client.getInstance();
    private WorkorderDialog d;

    /**
     * Constructs the Day view.
     * @param inflater The inflater for the Fragment.
     * @param container The container of the Fragment.
     * @param savedInstanceState The arguments of the saved state.
     * @return View The view of the day.
     */
    @Override
    public View onCreateView(final LayoutInflater inflater,
                             final ViewGroup container, final Bundle savedInstanceState) {
        final View rootView = inflater.inflate(
                R.layout.day_fragment, container, false);
        final Bundle args = getArguments();
        final int dayPosition = args.getInt(ARG_OBJECT);
        final int deviation = dayPosition - 50;
        final Date devDate = DateUtil.getDateFromNow(deviation);
        final String renderedDate = DateUtil.getDayInWeek(devDate) + " "
                + DateUtil.getDayOfMonth(devDate) + " "
                + DateUtil.getMonth(devDate);
        ((TextView) rootView.findViewById(R.id.date)).setText(renderedDate);
        final String currentDate = new SimpleDateFormat("MM/dd/yyyy").format(devDate);
        final JSONArray workOrders = client.getWorkOrders(currentDate);
        final ListView jobList = (ListView) rootView.findViewById(R.id.jobList);
        jobList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                try {
                    d = new WorkorderDialog(client.getCurrentActivity(), workOrders.getJSONObject(i), renderedDate, savedInstanceState);
                    d.constructDialog();
                    d.show();
                } catch (JSONException e) {
                    Log.e("CrafterException", e.getMessage());
                }
            }
        });
        jobList.setEmptyView(rootView.findViewById(R.id.emptyTextView));
        jobList.setAdapter(new JobAdapter(workOrders, inflater));
        return rootView;
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        if (d != null) {
            d.onResume();
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        if (d != null) {
            d.onResume();
        }
    }

    @Override
    public void onPause() {
        super.onPause();
        if (d != null) {
            d.onPause();
        }
    }

    @Override
    public void onLowMemory() {
        super.onLowMemory();
        if (d != null) {
            d.onLowMemory();
        }
    }
}

Answer 1

在Fragment的{{1}}实施中，您需要在MapView中致电MapView#onDestroy，如下所示：

Fragement#onDestroyView

这可确保@Override public void onDestroyView() { super.onDestroyView(); mapView.onDestroy(); }正确关闭，以便在第二次显示对话框时再次使用它。希望这有帮助！

回到对话框时MapView没有加载（MapBox）

1 个答案: