设置工具栏标题 [英] Set toolbar title

问题描述

我试图像这样设置工具栏标题:

I am trying to set my toolbar title like so:

public class StatisticsPage extends Fragment  {

    public StatisticsPage(){}
    private FragmentTabHost mTabHost;

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

        View rootView = inflater.inflate(R.layout.statistics_pagelayout, container, false);

        Spinner spinner = (Spinner) rootView.findViewById(R.id.statsSpin);
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getActivity(),
                R.array.statspage, R.layout.dropdown_item);
        spinner.setAdapter(adapter);
        getSupportActionBar().setTitle("My title");

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {

                switch (position) {
                    case 0:
                        break;
                    case 1:
                        // do whatever stuff you wanna do here
                        Fragment Fragment_one;
                        FragmentManager man= getActivity().getSupportFragmentManager();
                        FragmentTransaction tran = man.beginTransaction();
                        Fragment_one = new BreweryStatistics();
                        tran.replace(R.id.main, Fragment_one);//tran.
                        tran.addToBackStack(null);
                        tran.commit();
                        break;
                    case 2:
                        Fragment Fragment_two;
                        FragmentManager mantwo= getActivity().getSupportFragmentManager();
                        FragmentTransaction trantwo = mantwo.beginTransaction();
                        Fragment_two = new StyleStatistics();
                        trantwo.replace(R.id.main, Fragment_two);//tran.
                        trantwo.addToBackStack(null);
                        trantwo.commit();
                        break;
                    case 3:
                        Fragment Fragment_three;
                        FragmentManager manthree= getActivity().getSupportFragmentManager();
                        FragmentTransaction tranthree = manthree.beginTransaction();
                        Fragment_three = new TasteStatisticsPage();
                        tranthree.replace(R.id.main, Fragment_three);//tran.
                        tranthree.addToBackStack(null);
                        tranthree.commit();
                        break;
                }
            }

            @Override
            public void onNothingSelected(AdapterView<?> parentView) {
                // your code here
            }
        });

        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
        String userName = prefs.getString("userName", null);
        String userID = prefs.getString("userID", null);
        String url = "myURL";
        String userURLComp = "u=" + userID;

        url = url + userURLComp ;

        new getBasicStats(getActivity()).execute(url);

        return rootView;
    }
}

基本上上述代码中的这一行在该片段中不起作用:

Basically this line in the above code does not work in the fragment:

getSupportActionBar().setTitle("My title");

我又如何阻止我的应用标题显示在应用栏中?我还想在设置标题时将其设置为白色.

Also How can I stop my app title from showing up in the app bar? I would also like to make the title white when I can set it.

推荐答案

将其更改为

((AppCompatActivity)getActivity()).getSupportActionBar().setTitle("Home");

您需要告诉活动它是AppCompatActivity.

然后，由于您处于片段中，因此您可以使用getActivity()进行主要活动.

Then you use getActivity() to get the main activity since you are in a fragment.

然后像往常一样设置标题.

Then just set the title as usual.

这篇关于设置工具栏标题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！