editor.putString("text", mSaved.getText().toString());

这里，mSaved可以是任何TextView或EditText，从中我们可以提取一个字符串。您可以简单地指定一个字符串。这里的text将是键，它持有从mSaved (TextView或EditText)获得的值。

SharedPreferences prefs = this.getSharedPreferences("com.example.app", Context.MODE_PRIVATE);

此外，不需要使用包名保存首选项文件，即“com.example.app”。你可以提到自己喜欢的名字。希望这能有所帮助!

Edit

SharedPreferences pref = getSharedPreferences("YourPref", MODE_PRIVATE);
SharedPreferences.Editor editor = pref.edit();
editor.putString("yourValue", value);
editor.commit();

Read

SharedPreferences pref = getSharedPreferences("YourPref", MODE_PRIVATE);
value= pref.getString("yourValue", "");

简单的方法:

保存:

getPreferences(MODE_PRIVATE).edit().putString("Name of variable",value).commit();

检索:

your_variable = getPreferences(MODE_PRIVATE).getString("Name of variable",default value);

2.用于存储在共享优先级

SharedPreferences.Editor editor = 
getSharedPreferences("DeviceToken",MODE_PRIVATE).edit();
                    editor.putString("DeviceTokenkey","ABABABABABABABB12345");
editor.apply();

2.用于检索相同的用途

    SharedPreferences prefs = getSharedPreferences("DeviceToken", 
 MODE_PRIVATE);
  String deviceToken = prefs.getString("DeviceTokenkey", null);

我想在这里补充一点，当使用SharedPreferences时，这个问题的大多数代码片段都有类似MODE_PRIVATE的东西。MODE_PRIVATE意味着无论您写入这个共享首选项的是什么，都只能由您的应用程序读取。

Whatever key you pass to getSharedPreferences() method, android creates a file with that name and stores the preference data into it. Also remember that getSharedPreferences() is supposed to be used when you intend to have multiple preference files for your application. If you intend to use single preference file and store all key-value pairs into it then use the getSharedPreference() method. Its weird why everyone (including myself) simply uses getSharedPreferences() flavor without even understanding the difference between the above two.

下面的视频教程应该会有所帮助 https://www.youtube.com/watch?v=2PcAQ1NBy98

在共享首选项中存储值:

SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = preferences.edit();
editor.putString("Name","Harneet");
editor.apply();

从共享首选项中检索值:

SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
String name = preferences.getString("Name", "");
if(!name.equalsIgnoreCase(""))
{
    name = name + "  Sethi";  /* Edit the value here*/
}