3

我想在片段中创建可编辑的文本字段，在关闭或停止应用程序后将被保存。但是return notatki;我已经有了这个：

public class DetailFragment2 extends Fragment {

    private EditText notatki;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.e("Test", "hello");


    }     
    @SuppressLint("SimpleDateFormat")
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup parent,
            Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.details2, parent, false);
        notatki = (EditText) view.findViewById(R.id.editText1);
        SharedPreferences settings = this.getActivity().getSharedPreferences("PREFS", 0);
        notatki.setText(settings.getString("value", ""));
        return view;
    }  
    @Override
    public void onStop( ){
        super.onStop();
        if(notatki.getText() != null) {
            SharedPreferences settings = this.getActivity().getSharedPreferences("PREFS", 0);
            SharedPreferences.Editor editor = settings.edit();
            editor.putString("value", notatki.getText().toString());
            editor.commit();
        }
    }
}

当我改变return notatki;它return view;直到应用程序停止时，当我想保存editText的内容但它没有保存任何东西时。

4

5 回答 5

3

改成

private EditText notatki;
@SuppressLint("SimpleDateFormat")
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent,
        Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.details2, parent, false);
        notatki = (EditText) view.findViewById(R.id.editText1);
        SharedPreferences settings = this.getActivity().getSharedPreferences("PREFS", 0);
        notatki.setText(settings.getString("value", ""));

  return view; // return view here instead of notaki
}

您已经将 EditText 声明为类成员

 private EditText notatki;

所以只需在onCreateView.

于 2013-11-13T09:12:29.113 回答
1

改变

EditText notatki = (EditText) view.findViewById(R.id.editText1);

至

notatki = (EditText) view.findViewById(R.id.editText1);

因为如果你在你的中再次声明它，onCreateView它会影响全局，你会得到它为空onStop

于 2013-11-13T09:14:47.390 回答
0

尝试这个....

public View onCreateView(LayoutInflater inflater, ViewGroup parent,
        Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.details2, parent, false);
    EditText notatki = (EditText) view.findViewById(R.id.editText1);
    SharedPreferences settings = this.getActivity().getSharedPreferences("PREFS", 0);
    notatki.setText(settings.getString("value", ""));
    return view;
}
于 2013-11-13T09:15:15.387 回答
0

你做得对，但问题是你应该onCreateView从而不是 EditText 实例返回父视图notatki

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup parent,
            Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.details2, parent, false);
        ....
        return view;
    }
于 2013-11-13T09:15:15.493 回答
0 
private EditText etext;

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.secondfragment,container,false);
        etext = (EditText) getView().findViewById(R.id.editText4);
        return v;
于 2017-02-21T10:38:14.157 回答