这应该可以工作:

public void setSections (Context c,  List<Section> sectionList){
    this.sectionList = sectionList;

    Type sectionListType = new TypeToken<ArrayList<Section>>(){}.getType();
    String sectionListString = new Gson().toJson(sectionList,sectionListType);

    SharedPreferences.Editor editor = getSharedPreferences(c).edit().putString(PREFS_KEY_SECTIONS, sectionListString);
    editor.apply();
}

他们，要抓住它才:

public List<Section> getSections(Context c){

    if(this.sectionList == null){
        String sSections = getSharedPreferences(c).getString(PREFS_KEY_SECTIONS, null);

        if(sSections == null){
            return new ArrayList<>();
        }

        Type sectionListType = new TypeToken<ArrayList<Section>>(){}.getType();
        try {

            this.sectionList = new Gson().fromJson(sSections, sectionListType);

            if(this.sectionList == null){
                return new ArrayList<>();
            }
        }catch (JsonSyntaxException ex){

            return new ArrayList<>();

        }catch (JsonParseException exc){

            return new ArrayList<>();
        }
    }
    return this.sectionList;
}

这对我很管用。

您可以将其转换为Map Object来存储它，然后在检索SharedPreferences时将值更改回ArrayList。

Android sharedpreferences允许您将基本类型(Boolean, Float, Int, Long, String和StringSet，自API11以来可用)作为xml文件保存在内存中。

任何解决方案的关键思想都是将数据转换为这些基本类型之一。

我个人喜欢将my list转换为json格式，然后将其保存为SharedPreferences值中的字符串。

为了使用我的解决方案，你必须添加谷歌gsonlib。

在gradle中只需添加以下依赖项(请使用谷歌的最新版本):

compile 'com.google.code.gson:gson:2.6.2'

保存数据(HttpParam是你的对象):

List<HttpParam> httpParamList = "**get your list**"
String httpParamJSONList = new Gson().toJson(httpParamList);

SharedPreferences prefs = getSharedPreferences(**"your_prefes_key"**, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putString(**"your_prefes_key"**, httpParamJSONList);

editor.apply();

检索数据(HttpParam是你的对象):

SharedPreferences prefs = getSharedPreferences(**"your_prefes_key"**, Context.MODE_PRIVATE);
String httpParamJSONList = prefs.getString(**"your_prefes_key"**, ""); 

List<HttpParam> httpParamList =  
new Gson().fromJson(httpParamJSONList, new TypeToken<List<HttpParam>>() {
            }.getType());

嘿，朋友们，我没有使用Gson库就得到了上述问题的解决方案。我在这里发布源代码。

1.变量声明，即

  SharedPreferences shared;
  ArrayList<String> arrPackage;

2.变量初始化，即

 shared = getSharedPreferences("App_settings", MODE_PRIVATE);
 // add values for your ArrayList any where...
 arrPackage = new ArrayList<>();

3.使用packagesharedPreferences()将值存储到sharedPreference:

 private void packagesharedPreferences() {
   SharedPreferences.Editor editor = shared.edit();
   Set<String> set = new HashSet<String>();
   set.addAll(arrPackage);
   editor.putStringSet("DATE_LIST", set);
   editor.apply();
   Log.d("storesharedPreferences",""+set);
 }

4.使用retriveSharedValue()检索sharedPreference的值:

 private void retriveSharedValue() {
   Set<String> set = shared.getStringSet("DATE_LIST", null);
   arrPackage.addAll(set);
   Log.d("retrivesharedPreferences",""+set);
 }

我希望这对你有帮助…

    public  void saveUserName(Context con,String username)
    {
        try
        {
            usernameSharedPreferences= PreferenceManager.getDefaultSharedPreferences(con);
            usernameEditor = usernameSharedPreferences.edit();
            usernameEditor.putInt(PREFS_KEY_SIZE,(USERNAME.size()+1)); 
            int size=USERNAME.size();//USERNAME is arrayList
            usernameEditor.putString(PREFS_KEY_USERNAME+size,username);
            usernameEditor.commit();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }

    }
    public void loadUserName(Context con)
    {  
        try
        {
            usernameSharedPreferences= PreferenceManager.getDefaultSharedPreferences(con);
            size=usernameSharedPreferences.getInt(PREFS_KEY_SIZE,size);
            USERNAME.clear();
            for(int i=0;i<size;i++)
            { 
                String username1="";
                username1=usernameSharedPreferences.getString(PREFS_KEY_USERNAME+i,username1);
                USERNAME.add(username1);
            }
            usernameArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, USERNAME);
            username.setAdapter(usernameArrayAdapter);
            username.setThreshold(0);

        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

从SharedPreference中保存和检索ArrayList

 public static void addToPreference(String id,Context context) {
        SharedPreferences sharedPreferences = context.getSharedPreferences(Constants.MyPreference, Context.MODE_PRIVATE);
        ArrayList<String> list = getListFromPreference(context);
        if (!list.contains(id)) {
            list.add(id);
            SharedPreferences.Editor edit = sharedPreferences.edit();
            Set<String> set = new HashSet<>();
            set.addAll(list);
            edit.putStringSet(Constant.LIST, set);
            edit.commit();

        }
    }
    public static ArrayList<String> getListFromPreference(Context context) {
        SharedPreferences sharedPreferences = context.getSharedPreferences(Constants.MyPreference, Context.MODE_PRIVATE);
        Set<String> set = sharedPreferences.getStringSet(Constant.LIST, null);
        ArrayList<String> list = new ArrayList<>();
        if (set != null) {
            list = new ArrayList<>(set);
        }
        return list;
    }