android - 不兼容的 fragment 类型

Question

您好，我在 android 中有一个小应用程序，我在其中使用带抽屉导航的 fragment 作为菜单。但是现在我想在用户点击某些东西时在我的 fragment 对话框弹出窗口中显示，并且出现这些错误:

主要 Activity :

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");
    }
}

我遇到的第一个错误是 fragment = new HomeFragment(); >>incompatible types。

onCreateView 方法 上 HomeFragment 的第二个错误 >> 方法没有覆盖或实现父类(super class)型的方法

主页 fragment :

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

如何修复:

1. HomeFragment 必须扩展 Fragment
2. 您必须使用/导入 android.support.v4.app.Fragment、android.support.v4.app.DialogFragment、android.support.v4 .app.FragmentActivity 随处可见。
3. newFragment.show(getActivity().getSupportFragmentManager(), "dialog"); 使用 getsupportManager 而不是 FragmentManager()
4. 使用 FragmentManager fragmentManager = getSupportFragmentManager(); 而不是 FragmentManager()

这就是所有的帮助。