private SettingItemView siv_sim_bound;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_setup2);
    initUI();
  }

  private void initUI() {
    siv_sim_bound = (SettingItemView)findViewById(R.id.siv_sim_bound);
    //1.回显(读取已有的绑定状态，用作显示sp中是否存储了sim卡的序列号)
    final String sim_number = SpUtil.getString(this, ConstantValue.SIM_NUMBER, "");
    //2.判断是否序列卡号为""
    if(TextUtils.isEmpty(sim_number)) {
      siv_sim_bound.setCheck(false);
    } else {
      siv_sim_bound.setCheck(true);
    }
    siv_sim_bound.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        //3.获取原有的方法
        boolean isCheck = siv_sim_bound.isCheck();
        //4.将原有状态取反
        //5,状态设置给当前条目
        siv_sim_bound.setCheck(!isCheck);
        //6,存储(序列卡号)
        //6.1获取sim卡序列号TelephoneManager
        if(!isCheck) {
          TelephonyManager manager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
          //6.2获取sim卡的序列卡号
          String simSerialNumber = manager.getSimSerialNumber();
          //6.3存储
          SpUtil.putString(getApplicationContext(), ConstantValue.SIM_NUMBER, simSerialNumber);
        } else {
          //7,将存储序列卡号的节点,从sp中删除掉
          SpUtil.remove(getApplicationContext(), ConstantValue.SIM_NUMBER);
        }
      }
    });
  }

  /**
   * 从sp 中移除指定节点
   * @param context  上下文环境
   * @param key    需要一处节点的名称
   */
  public static void remove(Context context, String key) {
    // (存储节点文件名称，读写方式)
    if (sp == null) {
      sp = context.getSharedPreferences("config", context.MODE_PRIVATE);
    }
    sp.edit().remove(key).commit();
  }

<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<map>
 <string name="mobile_safe_psd">1107f203c8f0cd474aa3ab6a6e03c6cc</string>
 <string name="sim_number">89014103211118510720</string>
</map>

  public void nextPage(View view) {
    String serialNumber = SpUtil.getString(this, ConstantValue.SIM_NUMBER, "");
    if(!TextUtils.isEmpty(serialNumber)) {
      Intent intent = new Intent(getApplicationContext(), Setup3Activity.class);
      startActivity(intent);
      finish();
    } else {
      ToastUtil.show(this, "请绑定sim卡");
    }
  }