您可以使用gson.jar将类对象存储到SharedPreferences中。 你可以从google-gson下载这个罐子

或者在Gradle文件中添加GSON依赖项:

implementation 'com.google.code.gson:gson:2.8.8'

你可以在这里找到最新的版本

创建共享首选项:

SharedPreferences  mPrefs = getPreferences(MODE_PRIVATE);

保存:

MyObject myObject = new MyObject;
//set variables of 'myObject', etc.

Editor prefsEditor = mPrefs.edit();
Gson gson = new Gson();
String json = gson.toJson(myObject);
prefsEditor.putString("MyObject", json);
prefsEditor.commit();

检索:

Gson gson = new Gson();
String json = mPrefs.getString("MyObject", "");
MyObject obj = gson.fromJson(json, MyObject.class);

你还没有说明在这之后你对prefsEditor对象做了什么，但是为了持久化首选项数据，你还需要使用:

prefsEditor.commit();

步骤1:在java文件中复制粘贴这两个函数。

 public void setDefaults(String key, String value, Context context) {
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
        SharedPreferences.Editor editor = preferences.edit();
        editor.putString(key, value);
        editor.commit();
    }


    public static String getDefaults(String key, Context context) {
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
        return preferences.getString(key, null);
    }

步骤2: 为了节省使用:

 setDefaults("key","value",this);

检索使用:

String retrieve= getDefaults("key",this);

你可以通过使用不同的键名来设置不同的共享首选项，比如:

setDefaults("key1","xyz",this);

setDefaults("key2","abc",this);

setDefaults("key3","pqr",this);

这么多好答案，她是我的2美分

我更喜欢使用内联函数和旧风格的put和get值

object PreferenceHelper {

    private const val PREFERENCES_KEY = "MyLocalPreference"

    private fun getPreference(context: Context): SharedPreferences {
        return context.getSharedPreferences(
            PREFERENCES_KEY,
            Context.MODE_PRIVATE
        )
    }

    fun setBoolean(appContext: Context, key: String?, value: Boolean?) =
        getPreference(appContext).edit().putBoolean(key, value!!).apply()

    fun setInteger(appContext: Context, key: String?, value: Int) =
        getPreference(appContext).edit().putInt(key, value).apply()

    fun setFloat(appContext: Context, key: String?, value: Float) =
        getPreference(appContext).edit().putFloat(key, value).apply()

    fun setString(appContext: Context, key: String?, value: String?) =
        getPreference(appContext).edit().putString(key, value).apply()

    // To retrieve values from shared preferences:
    fun getBoolean(appContext: Context, key: String?, defaultValue: Boolean?): Boolean =
        getPreference(appContext).getBoolean(key, defaultValue!!)

    fun getInteger(appContext: Context, key: String?, defaultValue: Int): Int =
        getPreference(appContext)
            .getInt(key, defaultValue)

    fun getString(appContext: Context, key: String?, defaultValue: String?): String? =
        getPreference(appContext)
            .getString(key, defaultValue)


}

使用

PreferenceHelper.setString(context,"CUSTOMER_NAME", "HITESH")

Toast.makeText(context, "Hello " + PreferenceHelper.getString(context,"CUSTOMER_NAME", "User"), Toast.LENGTH_LONG).show()

我的utils类保存列表到SharedPreferences

public class SharedPrefApi {
    private SharedPreferences sharedPreferences;
    private Gson gson;

    public SharedPrefApi(Context context, Gson gson) {
        this.sharedPreferences = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
        this.gson = gson;
    } 

    ...

    public <T> void putObject(String key, T value) {
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.putString(key, gson.toJson(value));
        editor.apply();
    }

    public <T> T getObject(String key, Class<T> clazz) {
        return gson.fromJson(getString(key, null), clazz);
    }
}

使用

// for save
sharedPrefApi.putList(SharedPrefApi.Key.USER_LIST, userList);

// for retrieve
List<User> userList = sharedPrefApi.getList(SharedPrefApi.Key.USER_LIST, User.class);

． 我的utils的完整代码//检查使用实例的活动代码

有两个文件解决了共享首选项的所有问题

1)AppPersistence.java

    public class AppPersistence {
    public enum keys {
        USER_NAME, USER_ID, USER_NUMBER, USER_EMAIL, USER_ADDRESS, CITY, USER_IMAGE,
        DOB, MRG_Anniversary, COMPANY, USER_TYPE, support_phone
    }

    private static AppPersistence mAppPersistance;
    private SharedPreferences sharedPreferences;

    public static AppPersistence start(Context context) {
        if (mAppPersistance == null) {
            mAppPersistance = new AppPersistence(context);
        }
        return mAppPersistance;
    }

    private AppPersistence(Context context) {
        sharedPreferences = context.getSharedPreferences(context.getString(R.string.prefrence_file_name),
                Context.MODE_PRIVATE);
    }

    public Object get(Enum key) {
        Map<String, ?> all = sharedPreferences.getAll();
        return all.get(key.toString());
    }

    void save(Enum key, Object val) {
        SharedPreferences.Editor editor = sharedPreferences.edit();
        if (val instanceof Integer) {
            editor.putInt(key.toString(), (Integer) val);
        } else if (val instanceof String) {
            editor.putString(key.toString(), String.valueOf(val));
        } else if (val instanceof Float) {
            editor.putFloat(key.toString(), (Float) val);
        } else if (val instanceof Long) {
            editor.putLong(key.toString(), (Long) val);
        } else if (val instanceof Boolean) {
            editor.putBoolean(key.toString(), (Boolean) val);
        }
        editor.apply();
    }

    void remove(Enum key) {
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.remove(key.toString());
        editor.apply();
    }

    public void removeAll() {
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.clear();
        editor.apply();
    }
}

2)AppPreference.java

public static void setPreference(Context context, Enum Name, String Value) {
        AppPersistence.start(context).save(Name, Value);
    }

    public static String getPreference(Context context, Enum Name) {
        return (String) AppPersistence.start(context).get(Name);
    }

    public static void removePreference(Context context, Enum Name) {
        AppPersistence.start(context).remove(Name);
    }
}

现在你可以保存，删除或者获取，

保存

AppPreference.setPreference(context, AppPersistence.keys.USER_ID, userID);

删除

AppPreference.removePreference(context, AppPersistence.keys.USER_ID);

-get

 AppPreference.getPreference(context, AppPersistence.keys.USER_ID);