Analysis of the use of Android sharedpreferences _android

Sharedpreferences
It is used to provide the software parameter setting when the software is developed, the XML file is used to store the data, and the file is stored in the/data/data/<package name>/shared_prefs directory;

  
  

   
   
 
    Copy Code code as follows: 
   
  
  
  
  

   
   
public void
   savepreferences(String name, Integer age) {
   
   

   -->> Get sharedpreferences
   
   
Sharedpreferences preferences = context.getsharedpreferences ("Itcase", context.mode_private);
   
   
You do not need to specify the XML suffix name of the filename because the system knows it is an XML file and Android is automatically added;
   
   
Editor Editor = Preferences.edit ();//data stored in memory;
   
   
Editor.putstring ("name", name);
   
   
Editor.putint (' age ', age);
   
   
Editor.commit ()//must use this method to submit the intrinsic data back to the file
   
   
}
   
   

   

   

   
   

   
Public map<string, string> getpreferences() {
map<string, string> map = new hashmap<string, string> ();
Sharedpreferences preferences = context.getsharedpreferences ("Itcase",
context.mode_private);//You do not need to specify an XML suffix name because the system knows it is an XML file;
Map.put ("Name", Preferences.getstring ("name", "Default value"));//If no argument exists, the default value is returned
Map.put ("Age", String.valueof (Preferences.getint ("age", 0));
return map;
}
   

   
   

   
-->> Get Sharedpreferences
   

   
   

   
This.getpreferences (mode);//By default, the name of the activity is used as the name of the XML;
   

   
   

   
Preferencemanager.getdefaultsharedpreferences (context);
   

   
   

   
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android:onclick= "Save" <!--is used to specify a method name, which needs to be defined in the acvitity that displays the interface, and requires the Save method to be the same as its own OnClick signature, as follows! -->
   

   
   

   
View.onclicklistener () {
   

   
   

   
public void OnClick (View v) {}
   

   
   

   
}
   

   
   

   
The definition in public void Save (View v) {}//activity;
   

   
   

   
android:numeric= "integer" <!--set Numeric type-->