Android导航栏显示较低级别片段的指示符

我有一些问题将导航抽屉功能切换到较低级别片段的功能.我已经阅读了 this thread来管理显示指标.但是当按下按钮时,它会打开导航栏,而不是返回到前一个片段.而且我无法将EditUserFragment中的操作栏标题设置为“编辑个人资料”.
我正在使用Android Studio中提供的导航栏模板.

我有三个层次：

> MainActivity与导航抽屉,由Home和Profile项目组成
> UserFragment标题为“配置文件”,该选项可以显示EditUserFragment
> EditUserFragment(下级片段)由UserFragment触发

主要活动

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawerToggle = new ActionBarDrawerToggle(this,drawerLayout,R.drawable.ic_launcher,R.string.navigation_drawer_open,R.string.navigation_drawer_close);
}

@Override
public void onBackpressed() {
    super.onBackpressed();
    // this won't change the drawer indicator back
    drawerToggle.setDrawerIndicatorEnabled(true);
    // this works
    drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
}

public void onSectionAttached(int number) {
    // Show the corresponding title on the action bar when clicked and open corresponding
    // fragments.
    Fragment fragment = null;

    switch (number) {
        case 1:
            mTitle = getString(R.string.title_home);
            break;
        case 2:
            mTitle = getString(R.string.title_profile);
            fragment = new UserFragment();
            break;
    }

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

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    if (!mNavigationDrawerFragment.isDraweropen()) {
        // Only show items in the action bar relevant to this screen
        // if the drawer is not showing. Otherwise,let the drawer
        // decide what to show in the action bar.
        getMenuInflater().inflate(R.menu.main,menu);
        restoreActionBar();
        return true;
    }
    return super.onCreateOptionsMenu(menu);
}

public void restoreActionBar() {
    ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
    actionBar.setTitle(mTitle);
}

public void setActionBarTitle(String title){
    getActionBar().setTitle(title);
    Log.d("Title 2",getActionBar().getTitle().toString());
}

当我按下手机按钮(操作栏上没有按钮)时,onBackpressed正在部分工作(在代码中注释).

UserFragment

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

    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_profile,container,false);

    drawerLayout = (DrawerLayout) getActivity().findViewById(R.id.drawer_layout);
    drawerToggle = new ActionBarDrawerToggle(getActivity(),R.string.navigation_drawer_close);

    return view;
}

@Override
public boolean onoptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    switch (id) {
        case R.id.action_edit:
            drawerToggle.setDrawerIndicatorEnabled(false);
            // disable sliding from edge to open drawer
            drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
            getFragmentManager().beginTransaction()
                    .replace(R.id.container,new EditUserFragment())
                    .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
                    .addToBackStack(null)
                    .commit();
            return true;
        default:
            return super.onoptionsItemSelected(item);
    }
}

EditUserFragment

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setHasOptionsMenu(true);
    getActivity().getActionBar().setdisplayHomeAsUpEnabled(true);
    ((MainActivity) getActivity()).setActionBarTitle("Edit Profile");
    Log.d("Title",getActivity().getActionBar().getTitle().toString());
}

@Override
public boolean onoptionsItemSelected(MenuItem item) {
    // Get item selected and deal with it
    Log.d("KEY: ",String.valueOf(item.getItemId()));
    switch (item.getItemId()) {
        case android.R.id.home:
            Log.d("EditUserFragment","I'm here");
            getActivity().onBackpressed();
            return true;
        default:
            return super.onoptionsItemSelected(item);
    }
}

.getActivity()getActionBar()setdisplayHomeAsUpEnabled(真).按照预期的方式工作,而不是抽屉;虽然点击它,它开放抽屉,而不是回到以前的片段.另外,case android.R.id.home中的代码从不执行.
并且我尝试从“配置文件”将操作栏标题设置为“编辑配置文件”.日志显示我“编辑个人资料”,但由于某些原因,实际运行的应用程序会显示“配置文件”.

我想要实现的是可以通过点击up指示器从EditUserFragment返回到UserFragment(现在up指示器打开导航栏).并在EditUserFragment中显示正确的标题.

任何帮助是极大的赞赏！！

解决方法

经过几天的分析,我发现问题是我在创建时正在使用内置的导航抽屉活动.内置的将任务分成两部分. MainActivity和NavigationDrawerFragment.因此,我在MainActivity中的drawerToggle与NavigationDrawerFragment中的实际不一样.

主角,MainActivty调用NavigationDrawerFragment来设置导航栏所需的所有内容.我通过在MainActivity中实现导航抽屉来解决这个问题,所以我只有一个drawerToggle.虽然如果我在NavigationDrawerFragment中有所有的东西(导航栏的变量),而不是MainActivity,我仍然找不到办法让它工作.如果有人知道答案,请随意留言！

Android导航栏显示较低级别片段的指示符

解决方法

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