Android: Use Sharedpreferences to implement automatic login _android

This article describes Android: using Sharedpreferences to automate login, as follows:

Main code:

public class Loginactivity extends activity {private edittext username;
 Private EditText UserPassword;
 Private CheckBox remember;
 Private CheckBox Autologin;
 Private Button login;
 Private Sharedpreferences sp;

 
 Private String Usernamevalue,passwordvalue; @Override protected void OnCreate (Bundle savedinstancestate) {//TODO auto-generated Method stub super.oncreate (save
  Dinstancestate);

  
  Setcontentview (R.layout.login);
  Initialize user name, password, remember password, auto login, login button username = (edittext) Findviewbyid (r.id.username);
  UserPassword = (edittext) Findviewbyid (R.id.userpassword);
  Remember = (CheckBox) Findviewbyid (R.id.remember);
  Autologin = (CheckBox) Findviewbyid (R.id.autologin);

  Login = (Button) Findviewbyid (R.id.login);
  SP = getsharedpreferences ("UserInfo", 0);
  String name=sp.getstring ("user_name", "");
  

  String Pass =sp.getstring ("PASSWORD", "");
  Boolean Choseremember =sp.getboolean ("Remember", false);
Boolean Choseautologin =sp.getboolean ("Autologin", false); Toast.maketext (this, name, Toast.length_short). Show ();
   If the last time you choose to remember the password, then enter the login page also automatically tick remember the password, and fill in the username and password if (choseremember) {username.settext (name);
   Userpassword.settext (pass);
  Remember.setchecked (TRUE);
  //If the last login selected automatic login, then enter the login page automatically check the automatic login if (choseautologin) {autologin.setchecked (true); Login.setonclicklistener (New Onclicklistener () {///Default login account tinyphp, password 123 @Override public void on
    Click (View arg0) {usernamevalue = Username.gettext (). toString ();
    Passwordvalue = Userpassword.gettext (). toString ();
    
    Sharedpreferences.editor Editor =sp.edit (); 
     TODO auto-generated Method Stub if (Usernamevalue.equals ("tinyphp") && passwordvalue.equals ("123")) {
     
     Toast.maketext (Loginactivity.this, "Login Successful", Toast.length_short). Show ();
     Save username and password editor.putstring ("user_name", usernamevalue);
     
     Editor.putstring ("PASSWORD", Passwordvalue);      
   Remember Password if (remember.ischecked ()) {   Editor.putboolean ("Remember", true);    
     }else{Editor.putboolean ("Remember", false);        
      //Whether to automatically log in if (autologin.ischecked ()) {Editor.putboolean ("Autologin", true);
      }else{Editor.putboolean ("Autologin", false);
      
     } editor.commit ();
     Jump Intent Intent =new Intent (loginactivity.this,successactivity.class);
    StartActivity (Intent);
    else {toast.maketext (loginactivity.this, "username or password is wrong, please login again!", Toast.length_short). Show ();

 }

   }

  });
 }

}

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android= "http://schemas.android.com/apk/res/"
 Android "Android:layout_width=" Match_parent "android:layout_height=" match_parent "android:orientation=" vertical "
  android:padding= "10DP" > <textview android:layout_width= "wrap_content" android:layout_height= "Wrap_content" android:text= "User name:"/> <edittext android:id= "@+id/username" android:layout_width= "Match_parent" Android:layo
  ut_height= "Wrap_content" android:ems= "ten" android:inputtype= "Textpersonname" > </EditText> <textview Android:layout_width= "Wrap_content" android:layout_height= "wrap_content" android:layout_margintop= "10DP" Android: text= "Password:"/> <edittext android:id= "@+id/userpassword" android:layout_width= "Match_parent" android:layout_he ight= "Wrap_content" android:ems= "ten" android:inputtype= "Textpassword" > </EditText> <checkbox Android : id= "@+id/remember" Android:layout_widtH= "Wrap_content" android:layout_height= "Wrap_content" android:text= "Remember Password"/> <checkbox "android:id=" Login "android:layout_width=" wrap_content "android:layout_height=" wrap_content "android:text=" Automatic login "/> <Butt On android:id= "@+id/login" android:layout_width= "match_parent" android:layout_height= "Wrap_content" android:text= "
 Login "/> </LinearLayout>

SOURCE Download: Source code

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