别忘了实现Serializable:

Class dataBean implements Serializable{
 public String name;
}
ArrayList<dataBean> dataBeanArrayList = new ArrayList();

https://stackoverflow.com/a/7635154/4639974

正如@nirav所说，最好的解决方案是使用Gson实用工具类将其作为json文本存储在sharedpreferences中。下面是示例代码:

//Retrieve the values
Gson gson = new Gson();
String jsonText = Prefs.getString("key", null);
String[] text = gson.fromJson(jsonText, String[].class);  //EDIT: gso to gson


//Set the values
Gson gson = new Gson();
List<String> textList = new ArrayList<String>(data);
String jsonText = gson.toJson(textList);
prefsEditor.putString("key", jsonText);
prefsEditor.apply();

/**
 *     Save and get ArrayList in SharedPreference
 */

JAVA:

public void saveArrayList(ArrayList<String> list, String key){
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
    SharedPreferences.Editor editor = prefs.edit();
    Gson gson = new Gson();
    String json = gson.toJson(list);
    editor.putString(key, json);
    editor.apply();    

}

public ArrayList<String> getArrayList(String key){
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
    Gson gson = new Gson();
    String json = prefs.getString(key, null);
    Type type = new TypeToken<ArrayList<String>>() {}.getType();
    return gson.fromJson(json, type);
}

科特林

fun saveArrayList(list: java.util.ArrayList<String?>?, key: String?) {
    val prefs: SharedPreferences = PreferenceManager.getDefaultSharedPreferences(activity)
    val editor: Editor = prefs.edit()
    val gson = Gson()
    val json: String = gson.toJson(list)
    editor.putString(key, json)
    editor.apply()
}

fun getArrayList(key: String?): java.util.ArrayList<String?>? {
    val prefs: SharedPreferences = PreferenceManager.getDefaultSharedPreferences(activity)
    val gson = Gson()
    val json: String = prefs.getString(key, null)
    val type: Type = object : TypeToken<java.util.ArrayList<String?>?>() {}.getType()
    return gson.fromJson(json, type)
}

对于String, int, boolean，最好的选择是sharedPreferences。

如果你想存储数组列表或任何复杂的数据。最好的选择是Paper library。

添加依赖关系

implementation 'io.paperdb:paperdb:2.6'

初始化文件

应该在Application.onCreate()中初始化一次:

Paper.init(context);

Save

List<Person> contacts = ...
Paper.book().write("contacts", contacts);

加载数据

如果对象在存储中不存在，请使用默认值。

List<Person> contacts = Paper.book().read("contacts", new ArrayList<>());

给你。

https://github.com/pilgr/Paper

下面的代码是公认的答案，为新手(我)多写几行，例如。说明了如何将set类型对象转换回arrayList，并提供了关于`之前操作的附加指导。putStringSet'和。getstringset '。(谢谢你邪恶)

// shared preferences
   private SharedPreferences preferences;
   private SharedPreferences.Editor nsuserdefaults;

// setup persistent data
        preferences = this.getSharedPreferences("MyPreferences", MainActivity.MODE_PRIVATE);
        nsuserdefaults = preferences.edit();

        arrayOfMemberUrlsUserIsFollowing = new ArrayList<String>();
        //Retrieve followers from sharedPreferences
        Set<String> set = preferences.getStringSet("following", null);

        if (set == null) {
            // lazy instantiate array
            arrayOfMemberUrlsUserIsFollowing = new ArrayList<String>();
        } else {
            // there is data from previous run
            arrayOfMemberUrlsUserIsFollowing = new ArrayList<>(set);
        }

// convert arraylist to set, and save arrayOfMemberUrlsUserIsFollowing to nsuserdefaults
                Set<String> set = new HashSet<String>();
                set.addAll(arrayOfMemberUrlsUserIsFollowing);
                nsuserdefaults.putStringSet("following", set);
                nsuserdefaults.commit();

public class VcareSharedPreference {
  private static VcareSharedPreference sharePref = new VcareSharedPreference(); 
  private static SharedPreferences sharedPreferences; 
  private static SharedPreferences.Editor editor;
  private VcareSharedPreference() {
 } 
public static VcareSharedPreference getInstance(Context context) {
    if (sharedPreferences == null) {
        sharedPreferences = context.getSharedPreferences(context.getPackageName(), Activity.MODE_PRIVATE);
        editor = sharedPreferences.edit();
    }
    return sharePref;
 }
public void save(String KEY, String text) {
    editor.putString(KEY, text);
    editor.commit();
}
 public String getValue(String PREFKEY) {
    String text;

    //settings = PreferenceManager.getDefaultSharedPreferences(context);
    text = sharedPreferences.getString(PREFKEY, null);
    return text;
}
public void removeValue(String KEY) {
    editor.remove(KEY);
    editor.commit();
}

public void clearAll() {
    editor.clear();
    editor.commit();
}
public void saveArrayList(String key, ArrayList<ModelWelcome> modelCourses) {
    Gson gson = new Gson();
    String json = gson.toJson(modelCourses);
    editor.putString(key, json);
    editor.apply();
}

public ArrayList<ModelWelcome> getArray(String key) {

    Gson gson = new Gson();
    String json = sharedPreferences.getString(key, null);
    Type type = new TypeToken<ArrayList<ModelWelcome>>() {
    }.getType();
 return gson.fromJson(json, type);}}