Login system SharedPreferences

in this post You will show you how to Read , Write and Clear Value form Shared Preferences

Add permission To Manifest  AndroidManifest.xml

android.permission.READ_PHONE_STATE


Step 01 : Get Value From SharedPreferences

    SharedPreferences settings;
    String txtname;
String txtpass;
settings = context.getSharedPreferences("MyPrefs", Context.MODE_PRIVATE);
     txtname  = settings.getString("nameKey", null);
txtpass  = settings.getString("passKey", null);
    
   Step 02 : Set Value To SharedPreferences

        SharedPreferences sharedpreferences;
        sharedpreferences = getSharedPreferences("MyPrefs", Context.MODE_PRIVATE);
  SharedPreferences.Editor editor = sharedpreferences.edit();
        editor.putString("nameKey", n);
        editor.putString("passKey", ph);
        editor.commit();


Step 03 : Clear Value

   SharedPreferences sharedpreferences = getSharedPreferences("MyPrefs",                 Context.MODE_PRIVATE);
      SharedPreferences.Editor editor = sharedpreferences.edit();
      editor.clear();
      editor.commit();