java - 将 EditText 保存在 bundle 中并在布局更改时恢复它

Question

我为同一个 Fragment 创建了 2 个不同的布局。一个用于 Portrait，第二个用于 Landscape。我有一个 EditText 字段，如果我改变方向，我想传递它的内容，所以布局会切换。当 onViewCreated 被调用时，该值被保存并在 Log.d 中打印出来，但它没有在 EditText 字段中设置。 我还注意到，它只在第一次保存，并且在每次更改时， bundle 都会成倍增加。运行时的任何其他输入都将被忽略。

遵循:

02-07 10:26:15.100 9968-9968/parohyApps.antdiary D/NewData: Bundle string > hi
02-07 10:26:18.780 9968-9968/parohyApps.antdiary I/System.out: 2131492950
02-07 10:26:23.300 9968-9968/parohyApps.antdiary D/NewData: Bundle string > hi
02-07 10:26:23.340 9968-9968/parohyApps.antdiary D/NewData: Bundle string > hi
02-07 10:26:24.430 9968-9968/parohyApps.antdiary W/IInputConnectionWrapper: getExtractedText on inactive InputConnection
02-07 10:26:25.570 9968-9968/parohyApps.antdiary W/IInputConnectionWrapper: getExtractedText on inactive InputConnection
02-07 10:26:32.380 9968-9968/parohyApps.antdiary D/NewData: Bundle string > hi
02-07 10:26:32.400 9968-9968/parohyApps.antdiary D/NewData: Bundle string > hi
02-07 10:26:32.430 9968-9968/parohyApps.antdiary D/NewData: Bundle string > hi
02-07 10:26:32.550 9968-9968/parohyApps.antdiary I/Choreographer: Skipped 78 frames!  The application may be doing too much work on its main thread.

代码:

public class NewData extends Fragment {

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

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

    return view;
}

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    if(savedInstanceState != null){
        Log.d("NewData", "Bundle string > " + savedInstanceState.getString("outString", "NO STRING"));
        EditText name = (EditText) view.findViewById(R.id.et_name);
        name.setText(savedInstanceState.getString("outString", 
                                                   "NO STRING"));
    }

}

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

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    EditText name = (EditText) getActivity().findViewById(R.id.et_name);
    outState.putString("outString",name.getText().toString());
   }
}

Answer 1

我认为您需要将 fragment 保存在Activity 的onSaveInstanceState 和onRestoreInstanceState 中，例如:

保存 fragment

public void onSaveInstanceState(Bundle outState){
   getFragmentManager().putFragment(outState,"yourFragment",yourFragment);
}

恢复 fragment

public void onRestoreInstanceState(Bundle inState){
    yourFragment = getFragmentManager().getFragment(inState,"yourFragment");
}