不兼容的片段类型

Question

嗨,我在Android中有一个小应用程序,我使用片段与导航抽屉菜单.但是现在我想在我的片段对话框弹出窗口中显示当用户点击某些东西时,我得到这些错误:

主要活动:

private void displayView(int position) {
    // update the main content by replacing fragments
    Fragment fragment = null;
    switch (position) {
        case 0:
            fragment = new HomeFragment();
            break;
        case 1:
            fragment = new FindPeopleFragment();
            break;
        default:
            break;
    }

    if (fragment != null) {
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.frame_container, fragment).commit();

        // update selected item and title, then close the drawer
        mDrawerList.setItemChecked(position, true);
        mDrawerList.setSelection(position);
        setTitle(navMenuTitles[position]);
        mDrawerLayout.closeDrawer(mDrawerList);
    } else {
        // error in creating fragment
        Log.e("MainActivity", "Error in creating fragment");
    }
}

我得到的第一个错误是fragment = new HomeFragment(); >>不兼容的类型.

onCreateView方法的 HomeFragment上的第二个错误>>方法不会覆盖或实现超类型的方法

HomeFragment:

public class HomeFragment extends FragmentActivity {

public HomeFragment(){}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.fragment_home, container, false);
    final RelativeLayout rlPolievkaShowDialog=(RelativeLayout)rootView.findViewById(R.id.rlPolievkaButton);
    rlPolievkaShowDialog.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
        }

    });
    return rootView;
}

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

}

DialogFragmentAlergeny:

public class DialogFragmentAlergeny extends DialogFragment {

public static DialogFragmentAlergeny newInstance() {
    DialogFragmentAlergeny frag = new DialogFragmentAlergeny();
    return frag;
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(getActivity());
    View view = getActivity().getLayoutInflater().inflate(R.layout.alergeny_dialog, null);
    alertDialogBuilder.setView(view);
    alertDialogBuilder.setTitle(getString(R.string.alergeny_dialog_title));
    alertDialogBuilder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
    dialog.dismiss();
        }
    });
    return alertDialogBuilder.create();
}

}

Answer 1

如何解决它:

1. HomeFragment必须扩展Fragment
2. 您必须使用/进口android.support.v4.app.Fragment,android.support.v4.app.DialogFragment,android.support.v4.app.FragmentActivity处处需要的地方.
3. newFragment.show(getActivity().getSupportFragmentManager(), "dialog");使用getsupportManager不FragmentManager()
4. 使用 FragmentManager fragmentManager = getSupportFragmentManager();不FragmentManager()

这一切都是为了帮助.

Answer 2

HomeFragment不是片段,而是FragmentActivity ...更改将类扩展为Fragment

public class HomeFragment extends FragmentActivity { ... }