java - fragment 到 fragment EditText

Question

我想在单击按钮时将我的 EditText 输入从我的第一个 fragment 传递到第二个 fragment 上的 TextView 。但是当按钮点击被触发时，textview 显示“null”值。

第一个 fragment :

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

    TextView tv = (TextView) v.findViewById(R.id.tvFragFirst);
    tv.setText(getArguments().getString("msg"));

    Button btn = (Button) v.findViewById(R.id.tryBtn);
    btn.setOnClickListener(new View.OnClickListener() {
                               @Override
                               public void onClick(View v) {
                                   EditText woo = (EditText)v.findViewById(R.id.editText);
                                   MainActivity.myBundle.putString("Try", String.valueOf(woo));
                                   switch (v.getId()) {
                                       case R.id.tryBtn:
                                      SecondFragment home = new SecondFragment();
                                           FragmentTransaction ft = getFragmentManager().beginTransaction();
                                           ft.replace(R.id.first_frag, home);
                                           ft.setTransition(FragmentTransaction.TRANSIT_ENTER_MASK);
                                           ft.addToBackStack(null);
                                           ft.commit();
                                           break;
                                   }
                               }
                           }
    );

    return v;
}

第二个 fragment :

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

    TextView tv = (TextView) v.findViewById(R.id.tvFragSecond);
    TextView tvTry = (TextView) v.findViewById(R.id.tvTry);
    String myValue = (String) MainActivity.myBundle.get("Try");

    return v;
}

主要 Activity :

public static Bundle myBundle = new Bundle();

Answer 1

带参数调用newInstance怎么样？

SecondFragment.newInstance(/*your text*/)  //when you open your fragment

//in your Second Fragment
 public static SecondFragment newInstance(String data) {
    SecondFragment sFragment = new SecondFragment ();
    Bundle bundle = new Bundle();
    bundle.putString("data", data);
    sFragment.setArguments(bundle);
    return sFragment;
    }