blocks|key|267137|text|首先使用以下命令获取SharedPreferences的实例|type|unstyled|depth|inlineStyleRanges|entityRanges|data|267138|SharedPreferences+userDetails+=+context.getSharedPreferences("userdetails",+MODE_PRIVATE);|code-block|syntax|javascript|267139|现在保存SharedPreferences中的值|267140|Editor+edit+=+userDetails.edit();
edit.putString("username",+username.getText().toString().trim());
edit.putString("password",+password.getText().toString().trim());
edit.apply();|267141|上面的行将用户名和密码写入首选项|267142|现在，为了从首选项中检索保存的值，您可以按照以下代码行进行操作|267143|String+userName+=+userDetails.getString("username",+"");
String+password+=+userDetails.getString("password",+"");|267144|(注意:不建议在APP中保存密码。您应该在保存之前加密密码，或者跳过保存密码)|267145|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|10|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

First get the instance of SharedPreferences using

<pre><code>SharedPreferences userDetails = context.getSharedPreferences("userdetails", MODE_PRIVATE);
</code></pre>

Now to save the values in the SharedPreferences

<pre><code>Editor edit = userDetails.edit();
edit.putString("username", username.getText().toString().trim());
edit.putString("password", password.getText().toString().trim());
edit.apply();
</code></pre>

Above lines will write username and password to preference

Now to to retrieve saved values from preference, you can follow below lines of code

<pre><code>String userName = userDetails.getString("username", "");
String password = userDetails.getString("password", "");
</code></pre>

(NOTE: SAVING PASSWORD IN THE APP IS NOT RECOMMENDED. YOU SHOULD EITHER ENCRYPT THE PASSWORD BEFORE SAVING OR SKIP THE SAVING THE PASSWORD)

blocks|key|270725|text|//Set+Preference
SharedPreferences+myPrefs+=+getSharedPreferences("myPrefs",+MODE_PRIVATE);
SharedPreferences.Editor+prefsEditor;++
prefsEditor+=+myPrefs.edit();++
//strVersionName->Any+value+to+be+stored++
prefsEditor.putString("STOREDVALUE",+strVersionName);++
prefsEditor.commit();

//Get+Preferenece++
SharedPreferences+myPrefs;++++
myPrefs+=+getSharedPreferences("myPrefs",+MODE_PRIVATE);++
String+StoredValue=myPrefs.getString("STOREDVALUE",+"");|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|270726|试试这个..。|unstyled|270727|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>//Set Preference
SharedPreferences myPrefs = getSharedPreferences(&quot;myPrefs&quot;, MODE_PRIVATE);
SharedPreferences.Editor prefsEditor; 
prefsEditor = myPrefs.edit(); 
//strVersionName-&gt;Any value to be stored 
prefsEditor.putString(&quot;STOREDVALUE&quot;, strVersionName); 
prefsEditor.commit();

//Get Preferenece 
SharedPreferences myPrefs; 
myPrefs = getSharedPreferences(&quot;myPrefs&quot;, MODE_PRIVATE); 
String StoredValue=myPrefs.getString(&quot;STOREDVALUE&quot;, &quot;&quot;);
</code></pre>
Try this..

blocks|key|270736|text|在阅读了很多内容之后，唯一有效的方法是:在课堂上设置共享首选项：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|270737|SharedPreferences+userDetails+=+getApplicationContext().getSharedPreferences("test",+MODE_PRIVATE);
SharedPreferences.Editor+edit+=+userDetails.edit();
edit.clear();
edit.putString("test1",+"1");
edit.putString("test2",+"2");
edit.commit();|code-block|syntax|javascript|270738|在AlarmReciever中：|270739|SharedPreferences+userDetails+=+context.getSharedPreferences("test",+Context.MODE_PRIVATE);
String+test1+=+userDetails.getString("test1",+"");
String+test2+=+userDetails.getString("test2",+"");|270740|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

After reading around alot, only this worked:
In class to set Shared preferences:
<pre class="lang-java prettyprint-override"><code>SharedPreferences userDetails = getApplicationContext().getSharedPreferences(&quot;test&quot;, MODE_PRIVATE);
SharedPreferences.Editor edit = userDetails.edit();
edit.clear();
edit.putString(&quot;test1&quot;, &quot;1&quot;);
edit.putString(&quot;test2&quot;, &quot;2&quot;);
edit.commit();
</code></pre>
In AlarmReciever:
<pre class="lang-java prettyprint-override"><code>SharedPreferences userDetails = context.getSharedPreferences(&quot;test&quot;, Context.MODE_PRIVATE);
String test1 = userDetails.getString(&quot;test1&quot;, &quot;&quot;);
String test2 = userDetails.getString(&quot;test2&quot;, &quot;&quot;);
</code></pre>

blocks|key|270759|text|如果有人使用了这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|270760|val+sharedPreferences+=+PreferenceManager.getDefaultSharedPreferences(context)|code-block|syntax|javascript|270761|PreferenceManager现在被废弃了，重构为：|270762|val+sharedPreferences+=+context.getSharedPreferences(context.packageName+%2B+"_preferences",+Context.MODE_PRIVATE)|270763|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

If someone used this:

<pre><code>val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
</code></pre>

PreferenceManager is now depricated, refactor to this:

<pre><code>val sharedPreferences = context.getSharedPreferences(context.packageName + "_preferences", Context.MODE_PRIVATE)
</code></pre>

I have an application in which I have to implement a "Login" activity. I have these components:

<ol>
<li>EditText username</li>
<li>EditText password</li>
<li>Button Login</li>
<li>Button Cancel</li>
</ol>

I want that my application to remember the login details of the user once the user has logged in until the user would press the "log out" button. I'm not using preferences in my xml.

How do I get the getSharedPreferences(String name, int mode) to work in my application?

how to use getSharedPreferences in android

我有一个应用程序，我必须在其中实现一个“登录”活动。我有以下组件：EditText EditText Login按钮取消我希望我的应用程序在用户登录后记住用户的登录详细信息，直到用户按下“注销”按钮。我没有在我的xml中使用首选项。如何让getSharedPreferences(字符串名，整型模式)在我的应用程序中工作...

问如何在安卓系统中使用getSharedPreferences
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