在preference级存储整数 [英] Storing integers in preference class

问题描述

在我的Andr​​oid应用程序，我创建了一个preference类（扩展了preferenceActivity），用于存储约10的整数值。我不是创造的R.xml该活动的任何XML文件，因为我不想要它。我只需要保存在这个文件中10整数变量（甚至退出后，可以将其保存），我想从另一个活动获取这些值，进行一些改变preferences，然后保存preference类。

我的疑问是：

1. 如何保存在preference类的整型变量？
2. 如何调用该变量的另一项活动？
3. 如何再次返回变量preference类？

解决方案

你好我在这里补充样本code的共享preferences为你担心。请试试这个code，让我知道。希望它应该对你有帮助。谢谢你。

共享preferences创建：

 共享preferences共享preF = getBaseContext（）getShared preferences（USER_ preFS，Context.MODE_PRIVATE）。
 

存储值到共享preferences：

  INT用户id = 2425;
字符串的authToken =abcdef345345;
字符串authkey =QRST;
。共享preF = getBaseContext（）getShared preferences（USER_ preFS，prefMode）;
共享preferences.Editor编辑= vSmileShared preferences.edit（）;
editor.putString（AUTH_KEY，authkey）;
editor.putString（的auth_token的authToken）;
editor.putString（USER_ID，将String.valueOf（用户ID））;
editor.commit（）;
 

Retriving共享preferences从另一个活动值：

 字符串的authToken =;
字符串authkey =;
INT用户ID = 0;
。共享preferences共享preF = getBaseContext（）getShared preferences（USER_ preFS，Context.MODE_PRIVATE）;
的authToken =共享pref.getString（的auth_token，NULL）;
authkey =共享pref.getString（AUTH_KEY，NULL）;
用户ID =共享pref.getString（USER_ID，0）;
 

如果共享preference用户ID为空或空意味着将采取默认为0;

In my android app I have created a preference class(which extends PreferenceActivity) for storing about 10 integer values. I am not creating any xml file for that activity in R.xml as I don't want it. I just need to store 10 integer variables in this file(which can save it even after exit) and I want to get these values from another activity, perform some changes to the preferences, then save the preference class.

My queries are:

1. How can I store an integer variable in preference class?
2. How to call that variable from another activity?
3. How to return that variable again to preference class?

解决方案

Hi here i added sample code for SharedPreferences for you concern .please try this code and let me know. Hope it should helpful for you. Thanks.

SharedPreferences Creation:

SharedPreferences sharedPref = getBaseContext().getSharedPreferences("USER_PREFS",Context.MODE_PRIVATE);

Store the values to SharedPreferences:

int userId = 2425;
String authtoken = "abcdef345345";
String authkey = "qrst";
sharedPref = getBaseContext().getSharedPreferences("USER_PREFS",prefMode);
SharedPreferences.Editor editor = vSmileSharedPreferences.edit();
editor.putString("AUTH_KEY", authkey);
editor.putString("AUTH_TOKEN", authtoken);
editor.putString("USER_ID", String.valueOf(userId));
editor.commit();

Retriving SharedPreferences values from another Activity:

String authtoken ="";
String authkey = "";
int UserId = 0;
SharedPreferences sharedPref =  getBaseContext().getSharedPreferences("USER_PREFS",Context.MODE_PRIVATE);
authtoken = sharedPref.getString("AUTH_TOKEN", null);
authkey = sharedPref.getString("AUTH_KEY", null);
UserId = sharedPref.getString("USER_ID", 0);

If the SharedPreference UserID is null or empty means it will take default as 0;

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