How to Create Login Form Using Shared Preference in Android Studio? [With Source Code]

1. import shared preference

android.content.SharedPreferences


 2. declare all field inside the mainactivity class.

EditText user, pass;
Button login;
SharedPreferences sharedPreferences;
SharedPreferences.Editor editor;
Boolean savelogin;
CheckBox savelogincheckbox;

3. initialize all field inside the oncreate function:

user=(EditText)findViewById(R.id.txtuser);
pass=(EditText)findViewById(R.id.txtpass);
login=(Button)findViewById(R.id.btnlogin);
sharedPreferences = getSharedPreferences("loginref",MODE_PRIVATE);
savelogincheckbox=(CheckBox)findViewById(R.id.checkBox);
editor=sharedPreferences.edit();

4. Define one function outside the oncreate function but inside the mainactivity class which store the data:

public void login(){
    String usrname = user.getText().toString();
    String passwrd = pass.getText().toString();
    if(usrname.equals("TechSupportNep") && passwrd.equals("TechSupportNep")){
        Toast.makeText(this,"username and passwrod matched!",Toast.LENGTH_LONG).show();
        if(savelogincheckbox.isChecked()){
            editor.putBoolean("savelogin",true);
            editor.putString("username",usrname);
            editor.putString("password",passwrd);
            editor.commit();

        }
    }else {
        Toast.makeText(this, "error",Toast.LENGTH_LONG).show();
    }
}

5. call the function in the setOnClickLister event of button.

login.setOnClickListener(new View.OnClickListener() {
    @Override    public void onClick(View v) {
        login();
    }
});

6. retrieve the store data:

savelogin=sharedPreferences.getBoolean("savelogin",true);
if(savelogin==true){
    user.setText(sharedPreferences.getString("username",null));
    pass.setText(sharedPreferences.getString("password",null));

see all the procedure and designing part in video: