不相容的片段类型

Question

嗨，我在android中有一个小应用程序，我使用带有导航抽屉的片段作为菜单。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个东西，在那里我得到以下错误：

MainActivity:

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");
    }
}

第一个错误是片段=新的HomeFragment()；>>incompatible类型。

HomeFragment at onCreateView method >>方法上的第二个错误没有覆盖或实现来自超级类型的方法

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

HomeFragment不是片段，而是将类扩展到片段的FragmentActivity...change。

public class HomeFragment extends FragmentActivity { ... }

Answer 2

如何修正它：

1. HomeFragment必须扩展片段
2. 您必须在任何需要的地方使用/导入android.support.v4.app.Fragment、android.support.v4.app.DialogFragment、android.support.v4.app.FragmentActivity。
3. newFragment.show(getActivity().getSupportFragmentManager(), "dialog");使用getsupportManager而不是FragmentManager()
4. 使用FragmentManager fragmentManager = getSupportFragmentManager();而不是FragmentManager()

这一切都是为了寻求帮助。