android - 如何将活动中的searchview的输入发送到该活动的视图寻呼机中的片段

问题描述

所以我有一个searchview放置在一个有tablayout和viewpager的活动中。在viewpager中，每个标签都有一个带有textview的片段。我想做的是从searchview获取输入并设置textview的文本使用该输入，我似乎无法做到这一点。我尝试将来自 searchview 的输入放在一个包中（这是在活动中完成的），然后在 onCreateView() 中获取片段中的参数，但问题是是同时创建活动和片段，这意味着来自搜索视图的输入将为空。

这是活动：

public class SearchActivity extends AppCompatActivity {
TabLayout tabLayout;
ViewPager viewPager;
ViewPagerAdapter viewPagerAdapter;
SearchView searchView;
Toolbar toolbar;
ImageButton imageButtonBack;


@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_search);
    bindUI();
    
    viewPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());
    viewPagerAdapter.AddFragment(new NewestFragment(), "Newest"); // this line can cause crashes
    viewPagerAdapter.AddFragment(new OldestFragment(), "Oldest"); // this line can cause crashes
    viewPager.setAdapter(viewPagerAdapter);
    tabLayout.setupWithViewPager(viewPager);

    setSearchView();
    setImageButtonBack();
}

private void setSearchView() {
    searchView.requestFocus();
    View v = searchView.findViewById(R.id.search_plate);
    v.setBackgroundColor(Color.parseColor("#ffffff"));
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String query) {
            Bundle bundle = new Bundle();
            bundle.putString("searchViewText", searchView.getQuery().toString());
            NewestFragment newestFragment = new NewestFragment();
            OldestFragment oldestFragment = new OldestFragment();
            newestFragment.setArguments(bundle);
            oldestFragment.setArguments(bundle);
            searchView.clearFocus();
            return false;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
            Bundle bundle = new Bundle();
            bundle.putString("searchViewText", searchView.getQuery().toString());
            NewestFragment newestFragment = new NewestFragment();
            OldestFragment oldestFragment = new OldestFragment();
            newestFragment.setArguments(bundle);
            oldestFragment.setArguments(bundle);
            return false;
        }
    });

}

private void bindUI() {
    imageButtonBack = findViewById(R.id.back);
    tabLayout = findViewById(R.id.tabs);
    viewPager = findViewById(R.id.view_pager);
    searchView = findViewById(R.id.search_view_searchactivity);
    toolbar = findViewById(R.id.toolbar_selected_category);
}

private void setImageButtonBack() {
    imageButtonBack.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            finish();
        }
    });

}
}

ViewPager 的适配器：

public class ViewPagerAdapter extends FragmentPagerAdapter {

private final List<Fragment> fragmentList = new ArrayList<>(); // this line can cause crashes
private final List<String> titlesList = new ArrayList<>();

public ViewPagerAdapter(@NonNull FragmentManager fragmentManager) {
    super(fragmentManager);
}

@NonNull
@Override
public Fragment getItem(int position) {
    return fragmentList.get(position);
}

@Override
public int getCount() {
    return titlesList.size();
}

@Nullable
@Override
public CharSequence getPageTitle(int position) {
    return titlesList.get(position);
}

public void AddFragment(Fragment fragment, String title) {
    fragmentList.add(fragment); // this line can cause crashes
    titlesList.add(title);
}

@Override
public void notifyDataSetChanged() {
    super.notifyDataSetChanged();
}
}

这是片段：

public class NewestFragment extends Fragment {
View view;
TextView textView;

public NewestFragment(){

}

@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    view=inflater.inflate(R.layout.fragment_search_newest, container, false);
    textView=view.findViewById(R.id.tttttttttttttttttttt);
    try {
        String searchViewText=getArguments().getString("searchViewText");
        textView.setText(searchViewText);
    }
    catch (Exception e){
        //something
    }
    return view;
}
}

标签： androidandroid-fragmentsandroid-activityandroid-viewpagerandroid-tablayout

android - 如何将活动中的searchview的输入发送到该活动的视图寻呼机中的片段

问题描述

解决方案

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