java - 如何使用SharedPreference保存自定义ArrayList？

Question

我想知道如何将自定义ArrayList保存到Android手机中。 因为它习惯于过滤 Activity 。 我应该将此信息保存在任何地方。

ArrayList<ListAdapterItemsSelected> mSelectedList = new ArrayList<ListAdapterItemsSelected>();

public class ListAdapterItemsSelected {
    public String  sText;
    public boolean bSelected;

    public String getsText() {
        return sText;
    }

    public void setsText(String sText) {
        this.sText = sText;
    }


    public boolean isbSelected() {
        return bSelected;
    }


    public void setbSelected(boolean bSelected) {
        this.bSelected = bSelected;
    }  

    public ListAdapterItemsSelected(String _text, boolean _selected) {
        sText = _text;
        bSelected = _selected;
    }
}

Answer 1

使用GSON

Gson gson = new Gson();

ArrayList<ListAdapterItemsSelected> mSelectedList = new ArrayList<ListAdapterItemsSelected>();
String jsonString = gson.toJson(mSelectedList);
SharedPreferences sp = context.getSharedPreferences("KEY", Context.MODE_PRIVATE);

//Save to SharedPreferences
sp.edit().putString("KEY", jsonString).commit();

//Get to SharedPreferences

//For default value, just to get no errors while getting no value from the SharedPreferences
String empty_list = gson.toJson(new ArrayList<ListAdapterItemsSelected>()); 

ArrayList<ListAdapterItemsSelected> mSelectedList = gson.fromJson(sp.getString("KEY", empty_list),
        new TypeToken<ArrayList<ListAdapterItemsSelected>>() {
        }.getType());