如何在Android的SharedPreferences中保存/存储对象? [英] How do you save/store objects in SharedPreferences on Android?

问题描述

我需要在许多地方获取用户对象，其中包含许多字段.登录后，我想保存/存储这些用户对象.我们如何实现这种情况?

I need to get user objects in many places, which contain many fields. After login, I want to save/store these user objects. How can we implement this kind of scenario?

我不能这样存储它:

SharedPreferences.Editor prefsEditor = myPrefs.edit();
prefsEditor.putString("BusinessUnit", strBusinessUnit);

推荐答案

您可以使用gson.jar将类对象存储到 SharedPreferences 中. 您可以从 google-gson

You can use gson.jar to store class objects into SharedPreferences. You can download this jar from google-gson

或在您的Gradle文件中添加GSON依赖项:

Or add the GSON dependency in your Gradle file:

implementation 'com.google.code.gson:gson:2.8.5'

创建共享首选项:

SharedPreferences  mPrefs = getPreferences(MODE_PRIVATE);

要保存:

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();

要检索:

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

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