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！！