[Android] Sharedpreference Getting Started

In order to save data with special characters to the file, Google provides the sharedpreference(shared parameters).

Sharedpreference is obtained through the getsharedpreference (name,mode) method of the Context Object objects, name parameter is the file name, Mode The parameters are those in the previous section.

Call the edit () method of the SP object to get the editor object

Call the putstring (key,value) method of the Editor object to put the data, much like the Map Collection

Invoke the commit () method of the Editor object to commit, much like a database transaction operation, to ensure that the data is committed successfully at the same time

Automatically create file /data/data/ package name /shared_prefs/ file name . XML

Read sp very simple, same get SP object, call SP object getString (key,defaultvalue) , the configuration information for the application can be saved using this. When a different type of value is saved, the node is its own type. Special character Inode is escaped.

Copy the project, after modifying the package name must re-guide the R file, the appeal method will not throw an exception, the function is defined as void no return type.

Java code:

    /*** Business method to save user name and method *@paramContext Contexts *@paramUsername User name *@paramPassword method *@return     */     Public Static voidsaveuserinfo (Context context,string username,string password) {sharedpreferences SP=context.getsharedpreferences ("config", context.mode_private); Editor Ed=Sp.edit (); Ed.putstring ("Username", username); Ed.putstring ("Password", password);    Ed.commit (); }

        // Read        Sharedpreferences sp=getsharedpreferences ("config", context.mode_private);        Et_username.settext (sp.getstring ("username", ""));        Et_password.settext (sp.getstring ("password", ""));

[Android] Sharedpreference Getting Started