无法通过 Bundle 传递字符串值

Question

这个问题对我来说很严重，我需要有人帮助我解决这个问题。实际上，我正在通过组合导航抽屉和查看寻呼机选项卡式活动来创建一个 RSS 提要应用程序。我想将一个字符串值从一个片段传递到另一个片段。事情就是这样。它在使用导航抽屉活动时工作正常，但在与 view-pager 结合后，String 没有通过捆绑传递给其他片段，我找不到错误，因为它没有显示任何错误，

这是我正在传递的字符串

public class RssFragment extends Fragment implements OnItemClickListener {


private ProgressBar progressBar;
private ListView listView;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_first, container, false);
    progressBar = (ProgressBar) view.findViewById(R.id.progressBar);
    listView = (ListView) view.findViewById(R.id.listView);
    listView.setOnItemClickListener(this);
    return view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    startService();
}

private void startService() {
    Intent intent = new Intent(getActivity(), RssService.class);
    getActivity().startService(intent);
}

/**
 * Once the {@link RssService} finishes its task, the result is sent to this BroadcastReceiver
 */
private BroadcastReceiver resultReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        progressBar.setVisibility(View.GONE);
        List<RssItem> items = (List<RssItem>) intent.getSerializableExtra(RssService.ITEMS);
        if (items != null) {
            RssAdapter adapter = new RssAdapter(getActivity(), items);
            listView.setAdapter(adapter);
        } else {
            Toast.makeText(getActivity(), "An error occurred while downloading the rss feed.",
                    Toast.LENGTH_LONG).show();
        }
    }
};

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    RssAdapter adapter = (RssAdapter) parent.getAdapter();
    RssItem item = (RssItem) adapter.getItem(position);


    Uri uri = Uri.parse(item.getDescription());
    String string;
    string=uri.toString();



    result Des_1=new result();
    FragmentManager fragmentManager1 =getActivity().getSupportFragmentManager();
    fragmentManager1.beginTransaction().replace(R.id.content_main_layout_frame,Des_1 ).addToBackStack("fragBack").commit();



    result ldf = new result();
    Bundle args = new Bundle();
    args.putString("YourKey", string);
    ldf.setArguments(args);
    getFragmentManager().beginTransaction().add(R.id.content_main_layout_frame, ldf).commit();

}

@Override
public void onStart() {
    super.onStart();
    IntentFilter intentFilter = new IntentFilter(RssService.ACTION_RSS_PARSED);
    LocalBroadcastManager.getInstance(getActivity()).registerReceiver(resultReceiver, intentFilter);
}

@Override
public void onStop() {
    super.onStop();
    LocalBroadcastManager.getInstance(getActivity()).unregisterReceiver(resultReceiver);
}
}

这就是我接收字符串的方式

public class result extends Fragment {


public result() {


    // Required empty public constructor
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootview=inflater.inflate(R.layout.fragment_result,container,false);

    Bundle bundle = getArguments();

    TextView textView=(TextView)rootview.findViewById(R.id.distext);





    if(bundle != null) {

        String value = bundle.getString("YourKey");

        textView.setText(value);

      //  Toast.makeText(getActivity(), value,
            //   Toast.LENGTH_LONG).show();

    }





    return rootview;
}

}

我很高兴有人能解决这个问题。我再说一遍它可以工作，但现在不行了

这是另一个片段

public class datafragment extends Fragment {
View view;
ViewPager viewPager;
TabLayout tabLayout;


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


    viewPager = (ViewPager) view.findViewById(R.id.viewpager);
    viewPager.setAdapter(new sliderAdapter(getChildFragmentManager()));
    tabLayout = (TabLayout) view.findViewById(R.id.sliding_tabs);
    tabLayout.post(new Runnable() {
        @Override
        public void run() {
            tabLayout.setupWithViewPager(viewPager);
        }
    });

    return view;

}




private class sliderAdapter extends FragmentPagerAdapter{

    final  String tabs[]={"tab1", "tab2","tab3"};
    public sliderAdapter(FragmentManager fm) {
        super(fm);
    }


    @Override
    public Fragment getItem(int position) {
        Fragment fragment = null;
        switch (position){
            case 0:
                fragment = new RssFragment();
                break;
            case 1:
                fragment = new RssFragment();
                break;
            case 2:
                fragment = new RssFragment();
                break;
        }
        return fragment;
    }


    @Override
    public int getCount() {


       return 3;
    }
   @Override
   public CharSequence getPageTitle(int position) {
        return tabs[position];
   }
}




}

Answer 1

试试下面这个，

ldf = new result(); 
Bundle bundle = new Bundle();
FragmentTransaction fragmentTransaction = 
getActivity().getSupportFragmentManager().beginTransaction();
bundle.putString("key","value");
ldf.setArguments(bundle);
fragmentTransaction.addToBackStack("fragBack");
fragmentTransaction.replace(R.id.content_main_layout_frame, ldf);
fragmentTransaction.commit();

Answer 2

删除这两个事务并添加以下代码，

ldf = new result(); 
Bundle bundle = new Bundle();
FragmentTransaction fragmentTransaction = 
getActivity().getSupportFragmentManager().beginTransaction();
bundle.putString("key","value");
ldf.setArguments(bundle);
fragmentTransaction.addToBackStack("fragBack");
fragmentTransaction.add(R.id.content_main_layout_frame, ldf);
fragmentTransaction.commit();

如果有帮助，请告诉我！

Answer 3

试试这个

public class result extends Fragment {


public result() {


// Required empty public constructor
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                     Bundle savedInstanceState) {
View rootview=inflater.inflate(R.layout.fragment_result,container,false);

TextView textView=(TextView)rootview.findViewById(R.id.distext);


if(savedInstanceState!= null) {

    String value = savedInstanceState.getString("YourKey");

    textView.setText(value);

  //  Toast.makeText(getActivity(), value,
        //   Toast.LENGTH_LONG).show();

}

return rootview;
}

}