Android's permanent login and logout login

First, permanent landing

Sharedprefrence Store UserID and password

Private String File = "saveusernamepwd";//For saving sharedpreferences files
Private Sharedpreferences SP = null;//declares a sharedpreferences

SP = Getsharedpreferences (FILE, mode_private);//Initialize Sharedprefrences

protected void InitData () {
Name = sp.getstring ("name", "");
Password = sp.getstring ("Password", "" ");
Nameet.settext (name);
Passwordet.settext (password);
Editor editor = Sp.edit ();
Editor.putstring ("Name", Nameet.gettext (). toString ());
Editor.putstring ("Password", Passwordet.gettext (). toString ());
Editor.commit ();
}

The following is written in the login click event:

　　　　

if (sp = = null) {
SP = Getsharedpreferences (FILE, mode_private);
}
Editor edit = Sp.edit ();
Edit.putstring ("Name", Nameet.gettext (). toString ());
Edit.putstring ("Password", Passwordet.gettext (). toString ());
Edit.commit ();

Second, log off login

1. Empty the data in sharedpreferences

Private Sharedpreferences sp;

public void Clearnuserinfo () {

SP = getsharedpreferences ("Saveusernamepwd", mode_private);
Sp.edit (). Clear (). commit ();
}

2. Empty the task stack (taskstack)

Intent logoutintent = new Intent (settinghomeactivity.this, Loginactivity.class);
Logoutintent.setflags (Intent.flag_activity_clear_top | Intent.flag_activity_new_task);
StartActivity (logoutintent);

All ok!

Android's permanent login and logout login