android - 如何从 ViewPager2 中的 EditText 获取文本？

Question

我有一个 ViewPager2，有两页。一个是获取电子邮件，另一个是获取电话号码。为了获得值，我向适配器添加了两个 get 方法，但我不确定这是正确且最安全的方法。这是我的代码：

  public class PhoneEmailFragment extends Fragment {

private View view;
private final String[] tabs = {"Phone", "Email"};
private User user;
private int pageSelected = 0;


@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    view = inflater.inflate(R.layout.fragment_phone_email, container, false);

    return view;
}

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    assert getArguments() != null;
    user = getArguments().getParcelable("user");
}

@Override
public void onStart() {
    super.onStart();
    viewpagerSetup();
}

private void viewpagerSetup() {

    TabLayout tabLayout = view.findViewById(R.id.register_phone_email_tab);
    ViewPager2 viewPager2 = view.findViewById(R.id.register_viewpager);

    SwipeAdapter adapter = new SwipeAdapter(this);
    viewPager2.setAdapter(adapter);

    viewPager2.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
        @Override
        public void onPageSelected(int position) {
            super.onPageSelected(position);
            pageSelected = position;
        }
    });

    new TabLayoutMediator(
            tabLayout,
            viewPager2,
            (tab, position) -> tab.setText(tabs[position])
    ).attach();

}

public void saveValue() {
        switch (pageSelected) {
            case 0:
                user.setUserPhoneNumber();
                break;
            case 1:
                user.setUserEmail();
                break;
        }

}

static class SwipeAdapter extends FragmentStateAdapter {

    public SwipeAdapter(@NonNull Fragment fragment) {
        super(fragment);
    }

    @NonNull
    @Override
    public Fragment createFragment(int position) {

        Fragment fragment = new Fragment();

        switch (position) {
            case 0:
                fragment = new PhoneFieldFragment();
                break;
            case 1:
                fragment = new EmailFieldFragment();
                break;
        }
        return fragment;
    }

    @Override
    public int getItemCount() {
        return 2;
    }

}

}

我想在 saveValue() 方法上使用 EditText 中的值。

标签： androidandroid-fragmentsandroid-viewpager2

Answer 1

更好的方法是使用 SharedViewModel。