@Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        SharedPreferences preferences=getSharedPreferences("zx", MODE_PRIVATE);

        Editor editor = preferences.edit();

        editor.putString("name", "张三");

        editor.commit();

        //读取

        preferences.getString("name", "123");

    }