获取活动/普通类的Andr​​oid共享preferences值 [英] Get Android shared preferences value in activity/normal class

问题描述

我已经做了一个存储用户设置的共享preference活动，现在我想在一个活动或普通的Java class.please值提供了一个解决方案或例子，我已经尝试过这种code，但失败了

I have made a shared preference activity that store the user settings, now i want to get values in a activity or normal java class.please provide a solution or example i have already tried this code but failed.

public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    SharedPreferences channel=this.getSharedPreferences(strFile, Context.MODE_PRIVATE);
    strChannel=channel.getString(keyChannel,"Default").toString();
    Toast.makeText(getApplicationContext(), strChannel, Toast.LENGTH_LONG).show();
}                     

在此code strfile 的如。 com.android.pack.ClassName 是共享preference活动从值是牵强，而且keyChannel是关键即在共享preference活动。

in this code strfile for eg. com.android.pack.ClassName is SharedPreference Activity from values to be fetched, and keyChannel is key that is same in SharedPreference Activity.

请提供了解决方案。

推荐答案

如果你有一个共享preferenceActivity由你救了你的价值观

If you have a SharedPreferenceActivity by which you have saved your values

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
String imgSett = prefs.getString(keyChannel, "");

如果该值保存在共享preference一个活动，然后这是挽救它的正确方法。

if the value is saved in a SharedPreference in an Activity then this is the correct way to saving it.

SharedPreferences shared = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
SharedPreferences.Editor editor = shared.edit();
editor.putString(keyChannel, email);
editor.commit();// commit is important here.

这是你如何检索值。

and this is how you can retrieve the values.

SharedPreferences shared = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
String channel = (shared.getString(keyChannel, ""));

另外要注意，您可以在非活动类也这样做，但唯一的条件是，你需要传递活动的背景下。使用此上下文来获取共享preferences。

Also be aware that you can do so in a non-Activity class too but the only condition is that you need to pass the context of the Activity. use this context in to get the SharedPreferences.

mContext.getSharedPreferences(PREF_NAME, MODE_PRIVATE);

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