如何从Activity转到PreferenceFragment?

本文介绍了如何从Activity转到PreferenceFragment?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我无法从我的主页(活动为 Activity )导航到使用 PreferenceFragment 的帐户设置页面.

I am having trouble navigating from my main page which is an Activity to the account settings page which uses PreferenceFragment.

我正在尝试通过导航抽屉实现这一点，当单击该项目时，应显示设置页面.除帐户设置页面外，我所有其他页面均为 Fragment ，并且所有页面均正常工作(设置页面除外).我以为 PreferenceFragment 是 Fragment 的扩展，因此它肯定可以工作吗?

I'm trying to achieve this via the navigation drawer, when the item is clicked, the settings page should be displayed. All my other pages are a Fragment except the account settings page and all work properly (except for the settings page). I thought PreferenceFragment extends from Fragment so surely it should work?

MainPage.java

@Override
public void onNavigationDrawerItemSelected(int position) {
    // update the main content by replacing fragments
    FragmentManager fragmentManager = getSupportFragmentManager();
    if (position == 0) {
        fragmentManager.beginTransaction()
                .replace(R.id.container, PlaceholderFragment.newInstance(1))
                .commit();

    } else if (position == 1) {
        fragmentManager.beginTransaction()
                .replace(R.id.container, Search.newInstance(2))
                .commit();

    }

    else if (position == 2) {
        fragmentManager.beginTransaction()
                .replace(R.id.container, Favourites.newInstance(3))
                .commit();
    }

    else if (position == 3) {
        fragmentManager.beginTransaction()
                .replace(R.id.container, History.newInstance(4))
                .commit();

    }

    else if (position == 4) {
        fragmentManager.beginTransaction()
                .replace(R.id.container, AccountSettings.newInstance(5))
                .commit();

    }

}

AccountSettings.java

public class AccountSettings extends PreferenceFragment {

    Activity mActivity;

    private static final String ARG_SECTION_NUMBER = "section_number";

    public static AccountSettings newInstance(int sectionNumber) {
        AccountSettings fragment = new AccountSettings();
        Bundle args = new Bundle();
        args.putInt(ARG_SECTION_NUMBER, sectionNumber);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);    //inflating layout
        addPreferencesFromResource(R.xml.settings);
        setHasOptionsMenu(true);
        restoreActionBar();

    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        mActivity = activity;

    }

    public void restoreActionBar() {
        ActionBar actionBar = ((AppCompatActivity)getActivity()).getSupportActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
        actionBar.setDisplayShowTitleEnabled(true);
        actionBar.setTitle("Account Settings");
    }

    public AccountSettings() {

    }
}

这会在 MainPage.java 上给我以下错误:

It would give me the following error on MainPage.java:

'replace(int, android.support.v4.app.Fragment)' in 'android.support.v4.app.FragmentTransaction' cannot be applied to '(int, com.example.laptop.whatsfordinner.AccountSettings)'

我尝试将其更改为 Fragment ，并且可以使用，但是我想使用 PreferenceFragment ，那么如何使它起作用?

I've tried changing it to a Fragment and it works, but I want to use PreferenceFragment, so how can I get it to work?

我肯定会遗漏一些确实很明显的东西吗?

Surely I'm just missing something really obvious?

PreferenceFragment

如何从Activity转到PreferenceFragment?

问题描述

推荐答案