Android Shared Preference

MainActivity.java

public class MainActivity extends AppCompatActivity 
	
   SharedPreferences sharedpreference;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);

      SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
      SharedPreferences.Editor editor = settings.edit(); 
      editor.putString("key","value");
      editor.commit();
      // For Async Commit
      //editor.apply(); 
     
     // Read 
     SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
     String key = settings.getString("key", "DEFAULT_VALUE");
   }