public class UserVideoInfoActivity2 extends AppCompatActivity {


SharedPreferences.Editor editor;
SharedPreferences preferences;
SharedPreferences.Editor editor2;
SharedPreferences preferences2;

Button buttonadd;
Button buttondelete;


private static final String ADD = "ADD_KEY";
private final static String DELETE = "DELETE_KEY";


@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.user_video_info_layout_2);

    buttonadd = (Button) findViewById(R.id.buttonaddlayout);
    buttondelete = (Button) findViewById(R.id.buttondeletelayout);




    preferences = getSharedPreferences(ADD, Context.MODE_PRIVATE);
    preferences2 = getSharedPreferences(DELETE, Context.MODE_PRIVATE);

    buttonadd.setEnabled(GetState());

    buttondelete.setEnabled(GetState2());



    buttonadd.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            buttonadd.setEnabled(false);
            buttondelete.setEnabled(true);

            SaveState(buttonadd.isEnabled());


        }
    });

    buttondelete.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            buttonadd.setEnabled(true);
            buttondelete.setEnabled(false);

            SaveState2(buttondelete.isEnabled());


        }
    });


}

private void SaveState(boolean isChecked) {
    editor = preferences.edit();
    editor.putBoolean(ADD, isChecked);
    editor.commit();
}

private void SaveState2(boolean isChecked2) {
    editor2 = preferences2.edit();
    editor2.putBoolean(DELETE, isChecked2);
    editor2.commit();
}


public boolean GetState() {
    return preferences.getBoolean(ADD, false );

}


public boolean GetState2() {
    return preferences2.getBoolean(DELETE, false);
}

<Button
    android:id="@+id/buttonaddlayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="add" />

<Button
    android:id="@+id/buttondeletelayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="delete" />