Android Studio多個SharedPreferences保存在1個鍵值下？

Question

我有5個不同的字符串值需要保存在他們自己的SharedPreferences鍵下。但是，它們只能保存爲我爲editClass5Text設置的內容。

我試圖讓我的鑰匙串最終和/或它們初始化爲String，但隨後

private static final String ARG_PARAM1 = "param1"; 
private static final String ARG_PARAM2 = "param2"; 

// TODO: Rename and change types of parameters 
private String mParam1; 
private String mParam2; 
private OnFragmentInteractionListener mListener; 

private SharedPreferences sp; 
private SharedPreferences.Editor editor; 
private static final String SAVEFILE = "saveFile"; 

private EditText editClass1Text, editClass2Text, editClass3Text, editClass4Text, editClass5Text; 
private String class1TextSAVEFILE; 
private String class2TextSAVEFILE; 
private String class3TextSAVEFILE; 
private String class4TextSAVEFILE; 
private String class5TextSAVEFILE; 
private Button button; 
private View view; 

public ClassSettings() { 
    // Required empty public constructor 
} 

/** 
* Use this factory method to create a new instance of 
* this fragment using the provided parameters. 
* 
* @param param1 Parameter 1. 
* @param param2 Parameter 2. 
* @return A new instance of fragment Class1. 
*/ 
// TODO: Rename and change types and number of parameters 
public static ClassSettings newInstance(String param1, String param2) { 
    ClassSettings fragment = new ClassSettings(); 
    Bundle args = new Bundle(); 
    args.putString(ARG_PARAM1, param1); 
    args.putString(ARG_PARAM2, param2); 
    fragment.setArguments(args); 
    return fragment; 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    if (getArguments() != null) { 
     mParam1 = getArguments().getString(ARG_PARAM1); 
     mParam2 = getArguments().getString(ARG_PARAM2); 
    } 
    //initialize the SharedPreferences and the editor in onCreate so it is the first thing the fragment does. 
    sp = this.getActivity().getSharedPreferences("classSettings", Context.MODE_PRIVATE); 
    editor = sp.edit(); 

} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    //we initialize the view and set it to the inflater, 
    //so that we can return button, edit text, and set text in the inflater also. 
    view = inflater.inflate(R.layout.fragment_class_settings, container, false); 

    button = (Button) view.findViewById(R.id.buttonn); 
    button.setOnClickListener(this); 

    editClass1Text = (EditText) view.findViewById(R.id.class1); 
    editClass1Text.setText(sp.getString(null, class1TextSAVEFILE), TextView.BufferType.EDITABLE); 

    editClass2Text = (EditText) view.findViewById(R.id.class2); 
    editClass2Text.setText(sp.getString(null, class2TextSAVEFILE), TextView.BufferType.EDITABLE); 

    editClass3Text = (EditText) view.findViewById(R.id.class3); 
    editClass3Text.setText(sp.getString(null, class3TextSAVEFILE), TextView.BufferType.EDITABLE); 

    editClass4Text = (EditText) view.findViewById(R.id.class4); 
    editClass4Text.setText(sp.getString(null, class4TextSAVEFILE), TextView.BufferType.EDITABLE); 

    editClass5Text = (EditText) view.findViewById(R.id.class5); 
    editClass5Text.setText(sp.getString(null, class5TextSAVEFILE), TextView.BufferType.EDITABLE); 

    // return the view statement that includes the inflater, button edittext, and edittext.settext. 
    return view; 
} 

public void onClick(View v){ 
    //change the EditText object to a String and save it to the sp class1 

    editor.putString(class1TextSAVEFILE, editClass1Text.getText().toString()); 
    editor.putString(class2TextSAVEFILE, editClass2Text.getText().toString()); 
    editor.putString(class3TextSAVEFILE, editClass3Text.getText().toString()); 
    editor.putString(class4TextSAVEFILE, editClass4Text.getText().toString()); 
    editor.putString(class5TextSAVEFILE, editClass5Text.getText().toString()); 
    editor.commit(); 

    //sets the text saved to the EditText object, and saves it as editable. 
    editClass1Text.setText(sp.getString(null, class1TextSAVEFILE), TextView.BufferType.EDITABLE); 
    editClass2Text.setText(sp.getString(null, class2TextSAVEFILE), TextView.BufferType.EDITABLE); 
    editClass3Text.setText(sp.getString(null, class3TextSAVEFILE), TextView.BufferType.EDITABLE); 
    editClass4Text.setText(sp.getString(null, class4TextSAVEFILE), TextView.BufferType.EDITABLE); 
    editClass5Text.setText(sp.getString(null, class5TextSAVEFILE), TextView.BufferType.EDITABLE); 
} 


@Override 
public void onAttach(Context context) { 
    super.onAttach(context); 
    if (context instanceof OnFragmentInteractionListener) { 
     mListener = (OnFragmentInteractionListener) context; 
    } else { 
     throw new RuntimeException(context.toString() 
       + " must implement OnFragmentInteractionListener"); 
    } 
} 

@Override 
public void onDetach() { 
    super.onDetach(); 
    mListener = null; 
} 

/** 
* This interface must be implemented by activities that contain this 
* fragment to allow an interaction in this fragment to be communicated 
* to the activity and potentially other fragments contained in that 
* activity. 
* <p> 
* See the Android Training lesson <a href= 
* "http://developer.android.com/training/basics/fragments/communicating.html" 
* >Communicating with Other Fragments</a> for more information. 
*/ 
public interface OnFragmentInteractionListener { 
    // TODO: Update argument type and name 
    void onFragmentInteraction(Uri uri); 
} 

Answer 1

你沒有任何字符串分配給您的變量，默認字符串被分配空這就是您能夠保存editClass5Text值的原因。

null key , editClass4Text value (replaced by editClass3Text) 

null key, editClass5Text value replaced by editClass4Text) 

指定你的變量通過以下方式

private String class1TextSAVEFILE = "k1"; 

private String class2TextSAVEFILE = "k2"; 

private String class3TextSAVEFILE = "k3"; 

private String class4TextSAVEFILE = "k4"; 

private String class5TextSAVEFILE = "k5";