Question

如何将其转换为片段并将片段添加到每个导航中而不是文本我想添加片段并将整个代码更改为片段

任何可以帮助解决这个问题

public class QuestionPaper extends AppCompatActivity {

        private TextView TextMessage;

        private BottomNavigationView.OnNavigationItemSelectedListener OnNavigationItemSelectedListener
                = new BottomNavigationView.OnNavigationItemSelectedListener() {

            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                switch (item.getItemId()) {
                    case R.id.navigation_home:
                        TextMessage.setText(R.string.title_home);
                        return true;
                    case R.id.navigation_dashboard:
                        TextMessage.setText(R.string.title_dashboard);
                        return true;
                    case R.id.navigation_notifications:
                        mTextMessage.setText(R.string.title_notifications);
                        return true;
                }
                return false;
            }
        };

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

            mTextMessage = (TextView) findViewById(R.id.message);
            BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
            navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
        }

    }

Answer 1

为家庭，仪表板和通知创建自己的片段类。

public class QuestionPaper extends Fragment {
    private TextView mTextMessage;

    private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
            = new BottomNavigationView.OnNavigationItemSelectedListener() {

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            switch (item.getItemId()) {
                case R.id.navigation_home:
                    HomeFragment homeFragment = HomeFragment.newInstance();
                    createFragment(homeFragment);
                    return true;
                case R.id.navigation_dashboard:
                    DashBoardFragment dashBoardFragment = DashBoardFragment.newInstance();
                    createFragment(dashBoardFragment);
                    return true;
                case R.id.navigation_notifications:
                    NotiFragment notiFragment = NotiFragment.newInstance();
                    createFragment(notiFragment);
                    return true;
            }
            return false;
        }
    };

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_question_paper, container, false);
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        mTextMessage = (TextView) view.findViewById(R.id.message);
        BottomNavigationView navigation = (BottomNavigationView) view.findViewById(R.id.navigation);
        navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
    }

    public void createFragment(Fragment fragment) {
        FragmentTransaction ft = getChildFragmentManager().beginTransaction();
        ft.add(R.id.activity_home_container, fragment, null);
        ft.addToBackStack(null);
        ft.commitAllowingStateLoss();
    }
}

我如何将此活动转换为片段和片段到导航

1 个答案: